diff --git a/asset/assets_vfsdata.go b/asset/assets_vfsdata.go
index 26011bc2e7..9a6b33e87d 100644
--- a/asset/assets_vfsdata.go
+++ b/asset/assets_vfsdata.go
@@ -162,9 +162,9 @@ var Assets = func() http.FileSystem {
 		"/templates/default.tmpl": &vfsgen۰CompressedFileInfo{
 			name:             "default.tmpl",
 			modTime:          time.Date(1970, 1, 1, 0, 0, 1, 0, time.UTC),
-			uncompressedSize: 17128,
+			uncompressedSize: 17526,
 
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 		},
 	}
 	fs["/"].(*vfsgen۰DirInfo).entries = []os.FileInfo{
diff --git a/cmd/alertmanager/main.go b/cmd/alertmanager/main.go
index 1fc321fcf1..506fc55955 100644
--- a/cmd/alertmanager/main.go
+++ b/cmd/alertmanager/main.go
@@ -31,6 +31,7 @@ import (
 	"github.com/go-kit/kit/log"
 	"github.com/go-kit/kit/log/level"
 	"github.com/pkg/errors"
+	"github.com/prometheus/alertmanager/notify/sns"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"github.com/prometheus/common/model"
@@ -165,6 +166,9 @@ func buildReceiverIntegrations(nc *config.Receiver, tmpl *template.Template, log
 	for i, c := range nc.PushoverConfigs {
 		add("pushover", i, c, func(l log.Logger) (notify.Notifier, error) { return pushover.New(c, tmpl, l) })
 	}
+	for i, c := range nc.SNSConfigs {
+		add("sns", i, c, func(l log.Logger) (notify.Notifier, error) { return sns.New(c, tmpl, l) })
+	}
 	if errs.Len() > 0 {
 		return nil, &errs
 	}
diff --git a/config/config.go b/config/config.go
index ea207858a8..e8c4287f70 100644
--- a/config/config.go
+++ b/config/config.go
@@ -242,6 +242,9 @@ func resolveFilepaths(baseDir string, cfg *Config) {
 		for _, cfg := range receiver.WechatConfigs {
 			cfg.HTTPConfig.SetDirectory(baseDir)
 		}
+		for _, cfg := range receiver.SNSConfigs {
+			cfg.HTTPConfig.SetDirectory(baseDir)
+		}
 	}
 }
 
@@ -447,6 +450,11 @@ func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error {
 				voc.APIKey = c.Global.VictorOpsAPIKey
 			}
 		}
+		for _, sns := range rcv.SNSConfigs {
+			if sns.HTTPConfig == nil {
+				sns.HTTPConfig = c.Global.HTTPConfig
+			}
+		}
 		names[rcv.Name] = struct{}{}
 	}
 
@@ -784,6 +792,7 @@ type Receiver struct {
 	WechatConfigs    []*WechatConfig    `yaml:"wechat_configs,omitempty" json:"wechat_configs,omitempty"`
 	PushoverConfigs  []*PushoverConfig  `yaml:"pushover_configs,omitempty" json:"pushover_configs,omitempty"`
 	VictorOpsConfigs []*VictorOpsConfig `yaml:"victorops_configs,omitempty" json:"victorops_configs,omitempty"`
+	SNSConfigs       []*SNSConfig       `yaml:"sns_configs,omitempty" json:"sns_configs,omitempty"`
 }
 
 // UnmarshalYAML implements the yaml.Unmarshaler interface for Receiver.
diff --git a/config/config_test.go b/config/config_test.go
index df2fe4088f..b787b18185 100644
--- a/config/config_test.go
+++ b/config/config_test.go
@@ -26,7 +26,7 @@ import (
 	commoncfg "github.com/prometheus/common/config"
 	"github.com/prometheus/common/model"
 	"github.com/stretchr/testify/require"
-	yaml "gopkg.in/yaml.v2"
+	"gopkg.in/yaml.v2"
 )
 
 func TestLoadEmptyString(t *testing.T) {
@@ -1020,6 +1020,24 @@ func TestSlackGlobalAPIURLFile(t *testing.T) {
 	}
 }
 
+func TestValidSNSConfig(t *testing.T) {
+	_, err := LoadFile("testdata/conf.sns-topic-arn.yml")
+	if err != nil {
+		t.Fatalf("Error parsing %s: %s", "testdata/conf.sns-topic-arn.yml\"", err)
+	}
+}
+
+func TestInvalidSNSConfig(t *testing.T) {
+	_, err := LoadFile("testdata/conf.sns-invalid.yml")
+	if err == nil {
+		t.Fatalf("expected error with missing fields on SNS config")
+	}
+	const expectedErr = `must provide either a Target ARN, Topic ARN, or Phone Number for SNS config`
+	if err.Error() != expectedErr {
+		t.Errorf("Expected: %s\nGot: %s", expectedErr, err.Error())
+	}
+}
+
 func TestUnmarshalHostPort(t *testing.T) {
 	for _, tc := range []struct {
 		in string
diff --git a/config/notifiers.go b/config/notifiers.go
index 5db3d66ff6..157f61c4d9 100644
--- a/config/notifiers.go
+++ b/config/notifiers.go
@@ -20,6 +20,7 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
+	"github.com/prometheus/common/sigv4"
 
 	commoncfg "github.com/prometheus/common/config"
 )
@@ -127,6 +128,15 @@ var (
 		Expire:   duration(1 * time.Hour),
 		HTML:     false,
 	}
+
+	// DefaultSNSConfig defines default values for SNS configurations.
+	DefaultSNSConfig = SNSConfig{
+		NotifierConfig: NotifierConfig{
+			VSendResolved: true,
+		},
+		Subject: `{{ template "sns.default.subject" . }}`,
+		Message: `{{ template "sns.default.message" . }}`,
+	}
 )
 
 // NotifierConfig contains base options common across all notifier configurations.
@@ -579,3 +589,34 @@ func (c *PushoverConfig) UnmarshalYAML(unmarshal func(interface{}) error) error
 	}
 	return nil
 }
+
+type SNSConfig struct {
+	NotifierConfig `yaml:",inline" json:",inline"`
+
+	HTTPConfig *commoncfg.HTTPClientConfig `yaml:"http_config,omitempty" json:"http_config,omitempty"`
+
+	APIUrl      string            `yaml:"api_url,omitempty" json:"api_url,omitempty"`
+	Sigv4       sigv4.SigV4Config `yaml:"sigv4" json:"sigv4"`
+	TopicARN    string            `yaml:"topic_arn,omitempty" json:"topic_arn,omitempty"`
+	PhoneNumber string            `yaml:"phone_number,omitempty" json:"phone_number,omitempty"`
+	TargetARN   string            `yaml:"target_arn,omitempty" json:"target_arn,omitempty"`
+	Subject     string            `yaml:"subject,omitempty" json:"subject,omitempty"`
+	Message     string            `yaml:"message,omitempty" json:"message,omitempty"`
+	Attributes  map[string]string `yaml:"attributes,omitempty" json:"attributes,omitempty"`
+}
+
+// UnmarshalYAML implements the yaml.Unmarshaler interface.
+func (c *SNSConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	*c = DefaultSNSConfig
+	type plain SNSConfig
+	if err := unmarshal((*plain)(c)); err != nil {
+		return err
+	}
+	if (c.TargetARN == "") != (c.TopicARN == "") != (c.PhoneNumber == "") {
+		return fmt.Errorf("must provide either a Target ARN, Topic ARN, or Phone Number for SNS config")
+	}
+	if (c.Sigv4.AccessKey == "") != (c.Sigv4.SecretKey == "") {
+		return fmt.Errorf("must provide a AWS SigV4 Access key and Secret Key if credentials are specified in the SNS config")
+	}
+	return nil
+}
diff --git a/config/testdata/conf.sns-invalid.yml b/config/testdata/conf.sns-invalid.yml
new file mode 100644
index 0000000000..148c71e647
--- /dev/null
+++ b/config/testdata/conf.sns-invalid.yml
@@ -0,0 +1,14 @@
+route:
+  receiver: 'sns-api-notifications'
+  group_by: [alertname]
+
+receivers:
+  - name: 'sns-api-notifications'
+    sns_configs:
+      - api_url: https://sns.us-east-2.amazonaws.com
+        sigv4:
+          region: us-east-2
+          access_key: access_key
+          secret_key: secret_ket
+        attributes:
+          severity: Sev2
diff --git a/config/testdata/conf.sns-topic-arn.yml b/config/testdata/conf.sns-topic-arn.yml
new file mode 100644
index 0000000000..ab83ed9e06
--- /dev/null
+++ b/config/testdata/conf.sns-topic-arn.yml
@@ -0,0 +1,15 @@
+route:
+  receiver: 'sns-api-notifications'
+  group_by: [alertname]
+
+receivers:
+- name: 'sns-api-notifications'
+  sns_configs:
+    - api_url: https://sns.us-east-2.amazonaws.com
+      topic_arn: arn:aws:sns:us-east-2:123456789012:My-Topic
+      sigv4:
+        region: us-east-2
+        access_key: access_key
+        secret_key: secret_ket
+      attributes:
+        severity: Sev2
diff --git a/docs/configuration.md b/docs/configuration.md
index d520bce3a3..fe288e684b 100644
--- a/docs/configuration.md
+++ b/docs/configuration.md
@@ -693,6 +693,64 @@ value: <tmpl_string>
 [ short: <boolean> | default = slack_config.short_fields ]
 ```
 
+## `<sns_configs>`
+```yaml
+# Whether or not to notify about resolved alerts.
+[ send_resolved: <boolean> | default = false ]
+
+# The SNS API URL i.e. https://sns.us-east-2.amazonaws.com.
+#  If not specified, the SNS API URL from the SNS SDK will be used.
+[ api_url: <tmpl_string> ]
+
+# Configures AWS's Signature Verification 4 signing process to sign requests.
+sigv4:
+  [ <sigv4_config> ]
+  
+# SNS topic ARN, i.e. arn:aws:sns:us-east-2:698519295917:My-Topic
+# If you don't specify this value, you must specify a value for the phone_number or target_arn.
+# If you are using a FIFO SNS topic you should set a message group interval longer than 5 minutes
+# to prevent messages with the same group key being deduplicated by the SNS default deduplication window
+[ topic_arn: <tmpl_string> ]
+
+# Subject line when the message is delivered to email endpoints.
+[ subject: <tmpl_string> | default = '{{ template "sns.default.subject" .}}' ] 
+
+# Phone number if message is delivered via SMS in E.164 format.
+# If you don't specify this value, you must specify a value for the topic_arn or target_arn.
+[ phone_number: <tmpl_string> ] 
+
+# The  mobile platform endpoint ARN if message is delivered via mobile notifications.
+# If you don't specify this value, you must specify a value for the topic_arn or phone_number.
+[ target_arn: <tmpl_string> ] 
+
+# The message content of the SNS notification.
+[ message: <tmpl_string> | default = '{{ template "sns.default.message" .}}' ] 
+
+# SNS message attributes.
+attributes: 
+  [ <string>: <string> ... ]
+
+# The HTTP client's configuration.
+[ http_config: <http_config> | default = global.http_config ]
+```
+
+###`<sigv4_config>`
+```yaml
+# The AWS region. If blank, the region from the default credentials chain is used.
+[ region: <string> ]
+
+# The AWS API keys. Both access_key and secret_key must be supplied or both must be blank.
+# If blank the environment variables `AWS_ACCESS_KEY_ID` and `AWS_SECRET_ACCESS_KEY` are used. 
+[ access_key: <string> ]
+[ secret_key: <secret> ]
+
+# Named AWS profile used to authenticate.
+[ profile: <string> ]
+
+# AWS Role ARN, an alternative to using AWS API keys.
+[ role_arn: <string> ]
+```
+
 ## `<matcher>`
 
 A matcher is a string with a syntax inspired by PromQL and OpenMetrics. The syntax of a matcher consists of three tokens: 
diff --git a/go.mod b/go.mod
index 945765036d..a80ed35469 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,7 @@ module github.com/prometheus/alertmanager
 
 require (
 	github.com/alecthomas/units v0.0.0-20210208195552-ff826a37aa15
+	github.com/aws/aws-sdk-go v1.38.35
 	github.com/cenkalti/backoff/v4 v4.1.0
 	github.com/cespare/xxhash v1.1.0
 	github.com/go-kit/kit v0.10.0
@@ -22,8 +23,9 @@ require (
 	github.com/oklog/run v1.1.0
 	github.com/oklog/ulid v1.3.1
 	github.com/pkg/errors v0.9.1
-	github.com/prometheus/client_golang v1.10.0
-	github.com/prometheus/common v0.24.0
+	github.com/prometheus/client_golang v1.11.0
+	github.com/prometheus/common v0.29.0
+	github.com/prometheus/common/sigv4 v0.1.0
 	github.com/prometheus/exporter-toolkit v0.5.1
 	github.com/rs/cors v1.7.0
 	github.com/shurcooL/httpfs v0.0.0-20190707220628-8d4bc4ba7749
@@ -31,7 +33,7 @@ require (
 	github.com/stretchr/testify v1.7.0
 	github.com/xlab/treeprint v1.1.0
 	go.uber.org/atomic v1.5.0
-	golang.org/x/net v0.0.0-20210421230115-4e50805a0758
+	golang.org/x/net v0.0.0-20210525063256-abc453219eb5
 	golang.org/x/tools v0.1.0
 	gopkg.in/alecthomas/kingpin.v2 v2.2.6
 	gopkg.in/yaml.v2 v2.4.0
diff --git a/go.sum b/go.sum
index efc7d83848..df3f13039f 100644
--- a/go.sum
+++ b/go.sum
@@ -1,6 +1,38 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
+cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
+cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
+cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
+cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
+cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
+cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
+cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
+cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
+cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
+cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
+cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
+cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
+cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
+cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
+cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
+cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
+cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
+cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
+cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
+cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
+cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
+cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
+cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
+cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
+cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
+cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
+dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
 github.com/OneOfOne/xxhash v1.2.2 h1:KMrpdQIwFcEqXDklaen+P1axHaj9BSKzvpUUfnHldSE=
 github.com/OneOfOne/xxhash v1.2.2/go.mod h1:HSdplMjZKSmBqAxg5vPj2TmRDmfkzw+cTzAElWljhcU=
@@ -39,6 +71,8 @@ github.com/asaskevich/govalidator v0.0.0-20200907205600-7a23bdc65eef/go.mod h1:W
 github.com/aws/aws-lambda-go v1.13.3/go.mod h1:4UKl9IzQMoD+QF79YdCuzCwp8VbmG4VAQwij/eHl5CU=
 github.com/aws/aws-sdk-go v1.27.0/go.mod h1:KmX6BPdI08NWTb3/sm4ZGu5ShLoqVDhKgpiN924inxo=
 github.com/aws/aws-sdk-go v1.34.28/go.mod h1:H7NKnBqNVzoTJpGfLrQkkD+ytBA93eiDYi/+8rV9s48=
+github.com/aws/aws-sdk-go v1.38.35 h1:7AlAO0FC+8nFjxiGKEmq0QLpiA8/XFr6eIxgRTwkdTg=
+github.com/aws/aws-sdk-go v1.38.35/go.mod h1:hcU610XS61/+aQV88ixoOzUoG7v3b31pl2zKMmprdro=
 github.com/aws/aws-sdk-go-v2 v0.18.0/go.mod h1:JWVYvqSMppoMJC0x5wdwiImzgXTI9FuZwxzkQq9wy+g=
 github.com/beorn7/perks v0.0.0-20180321164747-3a771d992973/go.mod h1:Dwedo/Wpr24TaqPxmxbtue+5NUziq4I4S80YR8gNf3Q=
 github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
@@ -55,8 +89,12 @@ github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
 github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
+github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
+github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
 github.com/clbanning/x2j v0.0.0-20191024224557-825249438eec/go.mod h1:jMjuTZXRI4dUb/I5gc9Hdhagfvm9+RyrPryS/auMzxE=
 github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/cockroachdb/datadriven v0.0.0-20190809214429-80d97fb3cbaa/go.mod h1:zn76sxSg3SzpJ0PPJaLDCu+Bu0Lg3sKTORVIj19EIF8=
 github.com/codahale/hdrhistogram v0.0.0-20161010025455-3a0bb77429bd/go.mod h1:sE/e/2PUdi/liOCUjSTXgM1o87ZssimdTWN964YiIeI=
 github.com/coreos/go-semver v0.2.0/go.mod h1:nnelYz7RCh+5ahJtPPxZlU+153eP4D4r3EedlOD2RNk=
@@ -78,7 +116,9 @@ github.com/eapache/go-xerial-snappy v0.0.0-20180814174437-776d5712da21/go.mod h1
 github.com/eapache/queue v1.1.0/go.mod h1:6eCeP0CKFpHLu8blIFXhExK/dRa7WDZfr6jVFPTqq+I=
 github.com/edsrzf/mmap-go v1.0.0/go.mod h1:YO35OhQPt3KJa3ryjFM5Bs14WD66h8eGKpfaBNrHW5M=
 github.com/envoyproxy/go-control-plane v0.6.9/go.mod h1:SBwIajubJHhxtWwsL9s8ss4safvEdbitLhGGK48rN6g=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
 github.com/envoyproxy/go-control-plane v0.9.1-0.20191026205805-5f8ba28d4473/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
 github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/franela/goblin v0.0.0-20200105215937-c9ffbefa60db/go.mod h1:7dvUGVsVBjqR7JHJk0brhHOZYGmfBYOrK0ZhYMEtBr4=
@@ -87,10 +127,15 @@ github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMo
 github.com/ghodss/yaml v1.0.0/go.mod h1:4dBDuWmgqj2HViK6kFavaiC9ZROes6MMH2rRYeMEF04=
 github.com/globalsign/mgo v0.0.0-20180905125535-1ca0a4f7cbcb/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
 github.com/globalsign/mgo v0.0.0-20181015135952-eeefdecb41b8/go.mod h1:xkRDCp4j0OGD1HRkm4kmhM+pmpv3AKq5SU7GMg4oO/Q=
+github.com/go-gl/glfw v0.0.0-20190409004039-e6da0acd62b1/go.mod h1:vR7hzQXu2zJy9AVAgeJqvqgH9Q5CA+iKCZ2gyEVpxRU=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
+github.com/go-gl/glfw/v3.3/glfw v0.0.0-20200222043503-6f7a984d4dc4/go.mod h1:tQ2UAYgL5IevRw8kRxooKSPJfGvJ9fJQFa0TUsXzTg8=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.10.0 h1:dXFJfIHVvUcpSgDOV+Ne6t7jXri8Tfv2uOLHUZ2XNuo=
 github.com/go-kit/kit v0.10.0/go.mod h1:xUsJbQ/Fp4kEt7AFgCuvyX4a71u8h9jB8tj/ORgOZ7o=
+github.com/go-kit/log v0.1.0 h1:DGJh0Sm43HbOeYDNnVZFl8BvcYVvjD5bqYJvp0REbwQ=
+github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logfmt/logfmt v0.5.0 h1:TrB8swr/68K7m9CcGut2g3UOihhbcbiMAYiuTXdEih4=
@@ -227,15 +272,27 @@ github.com/gogo/protobuf v1.3.2/go.mod h1:P1XiOD3dCwIKUDQYPy72D8LYyHL2YPYrpS2s69
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/groupcache v0.0.0-20160516000752-02826c3e7903/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/groupcache v0.0.0-20191227052852-215e87163ea7/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
+github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e/go.mod h1:cIg4eruTrX1D+g88fzRXU5OdNfaM+9IcxsU14FzY7Hc=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
+github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
+github.com/golang/mock v1.4.0/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.3/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt3cw=
+github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
+github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
 github.com/golang/protobuf v1.4.0-rc.4.0.20200313231945-b860323f09d0/go.mod h1:WU3c8KckQ9AFe+yFwt9sWVRKCVIyN9cPHBJSNnbL67w=
 github.com/golang/protobuf v1.4.0/go.mod h1:jodUvKwWbYaEsadDk5Fwe5c77LiNKVO9IDvqG2KuDX0=
+github.com/golang/protobuf v1.4.1/go.mod h1:U8fpvMrcmy5pZrNK1lt4xCsGvpyWQ/VVv6QDs8UjoX8=
 github.com/golang/protobuf v1.4.2/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
 github.com/golang/protobuf v1.4.3 h1:JjCZWpVbqXDqFVmTfYWEVTMIYrL/NPdPSCHPJ0T/raM=
 github.com/golang/protobuf v1.4.3/go.mod h1:oDoupMAO8OvCJWAcko0GGGIgR6R6ocIYbsSw735rRwI=
@@ -248,14 +305,29 @@ github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5a
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 github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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@@ -296,12 +368,15 @@ github.com/hashicorp/memberlist v0.2.3/go.mod h1:MS2lj3INKhZjWNqd3N0m3J+Jxf3DAOn
 github.com/hashicorp/serf v0.8.2/go.mod h1:6hOLApaqBFA1NXqRQAsxw9QxuDEvNxSQRwA/JwenrHc=
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@@ -313,6 +388,9 @@ github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCV
 github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
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@@ -430,8 +508,8 @@ github.com/prometheus/client_golang v0.9.3-0.20190127221311-3c4408c8b829/go.mod
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
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 github.com/prometheus/client_golang v1.7.1/go.mod h1:PY5Wy2awLA44sXw4AOSfFBetzPP4j5+D6mVACh+pe2M=
-github.com/prometheus/client_golang v1.10.0 h1:/o0BDeWzLWXNZ+4q5gXltUvaMpJqckTa+jTNoB+z4cg=
-github.com/prometheus/client_golang v1.10.0/go.mod h1:WJM3cc3yu7XKBKa/I8WeZm+V3eltZnBwfENSU7mdogU=
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@@ -444,9 +522,11 @@ github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y8
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@@ -516,7 +596,9 @@ github.com/xiang90/probing v0.0.0-20190116061207-43a291ad63a2/go.mod h1:UETIi67q
 github.com/xlab/treeprint v1.1.0 h1:G/1DjNkPpfZCFt9CSh6b5/nY4VimlbHF3Rh4obvtzDk=
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 go.etcd.io/etcd v0.0.0-20191023171146-3cf2f69b5738/go.mod h1:dnLIgRNXwCJa5e+c6mIZCrds/GIG4ncV9HhK5PX7jPg=
@@ -531,7 +613,11 @@ go.mongodb.org/mongo-driver v1.5.1 h1:9nOVLGDfOaZ9R0tBumx/BcuqkbFpyTCU2r/Po7A2az
 go.mongodb.org/mongo-driver v1.5.1/go.mod h1:gRXCHX4Jo7J0IJ1oDQyUxF7jfy19UfxniMS4xxMmUqw=
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 go.opencensus.io v0.20.2/go.mod h1:6WKK9ahsWS3RSO+PY9ZHZUfv2irvY6gN279GOPZjmmk=
+go.opencensus.io v0.21.0/go.mod h1:mSImk1erAIZhrmZN+AvHh14ztQfjbGwt4TtuofqLduU=
+go.opencensus.io v0.22.0/go.mod h1:+kGneAE2xo2IficOXnaByMWTGM9T73dGwxeWcUqIpI8=
 go.opencensus.io v0.22.2/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.3/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
+go.opencensus.io v0.22.4/go.mod h1:yxeiOL68Rb0Xd1ddK5vPZ/oVn4vY4Ynel7k9FzqtOIw=
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@@ -547,6 +633,7 @@ golang.org/x/crypto v0.0.0-20190320223903-b7391e95e576/go.mod h1:djNgcEr1/C05ACk
 golang.org/x/crypto v0.0.0-20190422162423-af44ce270edf/go.mod h1:WFFai1msRO1wXaEeE5yQxYXgSfI8pQAWXbQop6sCtWE=
 golang.org/x/crypto v0.0.0-20190510104115-cbcb75029529/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
 golang.org/x/crypto v0.0.0-20190530122614-20be4c3c3ed5/go.mod h1:yigFU9vqHzYiE8UmvKecakEJjdnWj3jj499lnFckfCI=
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@@ -557,14 +644,34 @@ golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPh
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@@ -746,7 +987,14 @@ gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b h1:h8qDotaEPuJATrMmW04NCwg7v
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+honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
+honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
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+honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
+rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
 sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
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diff --git a/notify/notify.go b/notify/notify.go
index e1cd5f8075..46acea78e0 100644
--- a/notify/notify.go
+++ b/notify/notify.go
@@ -277,6 +277,7 @@ func NewMetrics(r prometheus.Registerer) *Metrics {
 		"opsgenie",
 		"webhook",
 		"victorops",
+		"sns",
 	} {
 		m.numNotifications.WithLabelValues(integration)
 		m.numTotalFailedNotifications.WithLabelValues(integration)
diff --git a/notify/sns/sns.go b/notify/sns/sns.go
new file mode 100644
index 0000000000..dbd1ccc145
--- /dev/null
+++ b/notify/sns/sns.go
@@ -0,0 +1,213 @@
+// Copyright 2021 Prometheus Team
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sns
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/aws/aws-sdk-go/aws"
+	"github.com/aws/aws-sdk-go/aws/awserr"
+	"github.com/aws/aws-sdk-go/aws/credentials"
+	"github.com/aws/aws-sdk-go/aws/credentials/stscreds"
+	"github.com/aws/aws-sdk-go/aws/session"
+	"github.com/aws/aws-sdk-go/service/sns"
+	"github.com/go-kit/kit/log"
+	"github.com/go-kit/kit/log/level"
+	"github.com/prometheus/alertmanager/config"
+	"github.com/prometheus/alertmanager/notify"
+	"github.com/prometheus/alertmanager/template"
+	"github.com/prometheus/alertmanager/types"
+	commoncfg "github.com/prometheus/common/config"
+)
+
+// Notifier implements a Notifier for SNS notifications.
+type Notifier struct {
+	conf    *config.SNSConfig
+	tmpl    *template.Template
+	logger  log.Logger
+	client  *http.Client
+	retrier *notify.Retrier
+	isFifo  *bool
+}
+
+// New returns a new SNS notification handler.
+func New(c *config.SNSConfig, t *template.Template, l log.Logger, httpOpts ...commoncfg.HTTPClientOption) (*Notifier, error) {
+	client, err := commoncfg.NewClientFromConfig(*c.HTTPConfig, "sns", append(httpOpts, commoncfg.WithHTTP2Disabled())...)
+	if err != nil {
+		return nil, err
+	}
+	return &Notifier{
+		conf:    c,
+		tmpl:    t,
+		logger:  l,
+		client:  client,
+		retrier: &notify.Retrier{},
+	}, nil
+}
+
+func (n *Notifier) Notify(ctx context.Context, alert ...*types.Alert) (bool, error) {
+	var (
+		err  error
+		data = notify.GetTemplateData(ctx, n.tmpl, alert, n.logger)
+		tmpl = notify.TmplText(n.tmpl, data, &err)
+	)
+
+	client, err := createSNSClient(n, tmpl)
+	if err != nil {
+		if e, ok := err.(awserr.RequestFailure); ok {
+			return n.retrier.Check(e.StatusCode(), strings.NewReader(e.Message()))
+		} else {
+			return true, err
+		}
+	}
+
+	publishInput, err := createPublishInput(ctx, n, tmpl)
+	if err != nil {
+		return true, err
+	}
+
+	publishOutput, err := client.Publish(publishInput)
+	if err != nil {
+		if e, ok := err.(awserr.RequestFailure); ok {
+			return n.retrier.Check(e.StatusCode(), strings.NewReader(e.Message()))
+		} else {
+			return true, err
+		}
+	}
+
+	level.Debug(n.logger).Log("msg", "SNS message successfully published", "message_id", publishOutput.MessageId, "sequence number", publishOutput.SequenceNumber)
+
+	return false, nil
+}
+
+func createSNSClient(n *Notifier, tmpl func(string) string) (*sns.SNS, error) {
+	var creds *credentials.Credentials = nil
+	// If there are provided sigV4 credentials we want to use those to create a session.
+	if n.conf.Sigv4.AccessKey != "" && n.conf.Sigv4.SecretKey != "" {
+		creds = credentials.NewStaticCredentials(n.conf.Sigv4.AccessKey, string(n.conf.Sigv4.SecretKey), "")
+	}
+	sess, err := session.NewSessionWithOptions(session.Options{
+		Config: aws.Config{
+			Region:   aws.String(n.conf.Sigv4.Region),
+			Endpoint: aws.String(tmpl(n.conf.APIUrl)),
+		},
+		Profile: n.conf.Sigv4.Profile,
+	})
+	if err != nil {
+		return nil, err
+	}
+
+	if n.conf.Sigv4.RoleARN != "" {
+		var stsSess *session.Session
+		if n.conf.APIUrl == "" {
+			stsSess = sess
+		} else {
+			// If we have set the API URL we need to create a new session to get the STS Credentials.
+			stsSess, err = session.NewSessionWithOptions(session.Options{
+				Config: aws.Config{
+					Region:      aws.String(n.conf.Sigv4.Region),
+					Credentials: creds,
+				},
+				Profile: n.conf.Sigv4.Profile,
+			})
+			if err != nil {
+				return nil, err
+			}
+		}
+		creds = stscreds.NewCredentials(stsSess, n.conf.Sigv4.RoleARN)
+	}
+	// Use our generated session with credentials to create the SNS Client.
+	client := sns.New(sess, &aws.Config{Credentials: creds})
+	// We will always need a region to be set by either the local config or the environment.
+	if aws.StringValue(sess.Config.Region) == "" {
+		return nil, fmt.Errorf("region not configured in sns.sigv4.region or in default credentials chain")
+	}
+	return client, nil
+}
+
+func createPublishInput(ctx context.Context, n *Notifier, tmpl func(string) string) (*sns.PublishInput, error) {
+	publishInput := &sns.PublishInput{}
+	messageAttributes := createMessageAttributes(n, tmpl)
+	// Max message size for a message in a SNS publish request is 256KB, except for SMS messages where the limit is 1600 characters/runes.
+	messageSizeLimit := 256 * 1024
+	if n.conf.TopicARN != "" {
+		topicTmpl := tmpl(n.conf.TopicARN)
+		publishInput.SetTopicArn(topicTmpl)
+		if n.isFifo == nil {
+			// If we are using a topic ARN it could be a FIFO topic specified by the topic postfix .fifo.
+			n.isFifo = aws.Bool(n.conf.TopicARN[len(n.conf.TopicARN)-5:] == ".fifo")
+		}
+		if *n.isFifo {
+			// Deduplication key and Message Group ID are only added if it's a FIFO SNS Topic.
+			key, err := notify.ExtractGroupKey(ctx)
+			if err != nil {
+				return nil, err
+			}
+			publishInput.SetMessageDeduplicationId(key.Hash())
+			publishInput.SetMessageGroupId(key.Hash())
+		}
+	}
+	if n.conf.PhoneNumber != "" {
+		publishInput.SetPhoneNumber(tmpl(n.conf.PhoneNumber))
+		// If we have an SMS message, we need to truncate to 1600 characters/runes.
+		messageSizeLimit = 1600
+	}
+	if n.conf.TargetARN != "" {
+		publishInput.SetTargetArn(tmpl(n.conf.TargetARN))
+	}
+
+	messageToSend, isTrunc, err := validateAndTruncateMessage(tmpl(n.conf.Message), messageSizeLimit)
+	if err != nil {
+		return nil, err
+	}
+	if isTrunc {
+		// If we truncated the message we need to add a message attribute showing that it was truncated.
+		messageAttributes["truncated"] = &sns.MessageAttributeValue{DataType: aws.String("String"), StringValue: aws.String("true")}
+	}
+
+	publishInput.SetMessage(messageToSend)
+	publishInput.SetMessageAttributes(messageAttributes)
+
+	if n.conf.Subject != "" {
+		publishInput.SetSubject(tmpl(n.conf.Subject))
+	}
+
+	return publishInput, nil
+}
+
+func validateAndTruncateMessage(message string, maxMessageSizeInBytes int) (string, bool, error) {
+	if !utf8.ValidString(message) {
+		return "", false, fmt.Errorf("non utf8 encoded message string")
+	}
+	if len(message) <= maxMessageSizeInBytes {
+		return message, false, nil
+	}
+	// if the message is larger than our specified size we have to truncate.
+	truncated := make([]byte, maxMessageSizeInBytes)
+	copy(truncated, message)
+	return string(truncated), true, nil
+}
+
+func createMessageAttributes(n *Notifier, tmpl func(string) string) map[string]*sns.MessageAttributeValue {
+	// Convert the given attributes map into the AWS Message Attributes Format
+	attributes := make(map[string]*sns.MessageAttributeValue, len(n.conf.Attributes))
+	for k, v := range n.conf.Attributes {
+		attributes[tmpl(k)] = &sns.MessageAttributeValue{DataType: aws.String("String"), StringValue: aws.String(tmpl(v))}
+	}
+	return attributes
+}
diff --git a/notify/sns/sns_test.go b/notify/sns/sns_test.go
new file mode 100644
index 0000000000..7d300ab1f6
--- /dev/null
+++ b/notify/sns/sns_test.go
@@ -0,0 +1,45 @@
+// Copyright 2021 Prometheus Team
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package sns
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestValidateAndTruncateMessage(t *testing.T) {
+	sBuff := make([]byte, 257*1024)
+	for i := range sBuff {
+		sBuff[i] = byte(33)
+	}
+	truncatedMessage, isTruncated, err := validateAndTruncateMessage(string(sBuff), 256*1024)
+	require.True(t, isTruncated)
+	require.NoError(t, err)
+	require.NotEqual(t, sBuff, truncatedMessage)
+	require.Equal(t, len(truncatedMessage), 256*1024)
+
+	sBuff = make([]byte, 100)
+	for i := range sBuff {
+		sBuff[i] = byte(33)
+	}
+	truncatedMessage, isTruncated, err = validateAndTruncateMessage(string(sBuff), 100)
+	require.False(t, isTruncated)
+	require.NoError(t, err)
+	require.Equal(t, string(sBuff), truncatedMessage)
+
+	invalidUtf8String := "\xc3\x28"
+	_, _, err = validateAndTruncateMessage(invalidUtf8String, 100)
+	require.Error(t, err)
+}
diff --git a/template/default.tmpl b/template/default.tmpl
index 64e95b49ab..35e4b4c5ad 100644
--- a/template/default.tmpl
+++ b/template/default.tmpl
@@ -217,3 +217,15 @@ Alerts Resolved:
 {{ end }}
 {{ end }}
 {{ define "pushover.default.url" }}{{ template "__alertmanagerURL" . }}{{ end }}
+
+{{ define "sns.default.subject" }}{{ template "__subject" . }}{{ end }}
+{{ define "sns.default.message" }}{{ .CommonAnnotations.SortedPairs.Values | join " " }}
+{{ if gt (len .Alerts.Firing) 0 }}
+Alerts Firing:
+{{ template "__text_alert_list" .Alerts.Firing }}
+{{ end }}
+{{ if gt (len .Alerts.Resolved) 0 }}
+Alerts Resolved:
+{{ template "__text_alert_list" .Alerts.Resolved }}
+{{ end }}
+{{ end }}