- Free tier: 10,000 emails/month (can apparently be raised up to 30,000 emails/month permanently by signing up through this page)
- Pros: great API, scheduling, SMTP or REST, logs and analytics,
- Free tier: 100,000 emails/month
- Pros: pre-built client libraries (Python, Php, Node.js...), SMTP or REST, real-time data with webhooks
- Exceeding the free tier: sending stops, user must add a credit card