- Free tier: 100 emails/day
- Pros: powerful insights, HTTP API, 24/7 support
- Exceeding the free tier: billing starts, no service interruptions
- Free tier: 24,000 emails/month
- Pros: SMTP or REST, API for logs and analytics
- Exceeding the free tier: billing starts, no service interruptions
- Free tier: 500 emails/month, 100 emails/day test accounts
- 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 / upgrade plan