THE EMAIL API SHORTLIST
Choose for the way
you build.
A source-linked comparison of setup, pricing and fit. Published by Emailer API, so we make our own limits explicit.
You want an assistant inside your email account to guide DNS, approved templates and integration code, with customer review before supported DNS changes and actual sends. You are comfortable evaluating a service with a small shared delivery budget.
| Provider | Starting price | Allowance / capacity context | Consider when |
|---|---|---|---|
| Emailer API | $0 / month · Free for Life | New accounts: 3,000 monthly recipient reservations; 100/day. Planned 50,000/day target is unavailable. Shared platform budget: 1,000 attempts/day, 50 reserved for identity. | Built-in setup help and strict event-backed transactional workflows. |
| Resend | $0 free; Pro $20/month | Free: 3,000 emails/month, 100/day, 3 domains. Pro: 50,000/month. | Developer email workflows, hosted MCP, agent tools and connectors. |
| Postmark | Free developer plan; Basic from $15/month | Free: 100 emails/month. Basic: 10,000/month. | Transactional and broadcast mail separated through Message Streams. |
| SendGrid | Trial, then a paid plan | New direct accounts: 60-day trial, 100 emails/day. Older and partner account terms can differ. | Teams evaluating both an Email API and separate marketing offerings. |
| Mailgun | $0 free; Basic $15/month | Free: 100 emails/day, 1 custom domain. Basic: 10,000/month. | Teams seeking an email API with SMTP and inbound routing options. |
| Amazon SES | Usage-based pricing | Essentials starts at $0.16/1,000; à la carte outbound $0.10/1,000. Data and optional services cost extra. | Teams comfortable assembling an email workflow in AWS. |
Emailer API vs Resend
Built-in guidance, AI tooling and migration tradeoffs.
Read comparison ↗Emailer API vs Postmark
Transactional controls, streams and free-plan fit.
Read comparison ↗Emailer API vs SendGrid
A focused setup path versus broader email requirements.
Read comparison ↗What this comparison does not measure
We have not run an independent head-to-head inbox-placement, latency, reliability or support study. Price alone does not establish total cost, throughput or suitability. Provider limits, account approval and feature packaging can change.
Sources and method
We checked official provider pages on September 7, 2026 and compared them with our own implementation and current runtime limits. This is our editorial assessment, not an independent review. No customer counts, ratings or delivery results are inferred.
YOUR NEXT STEP
Bring your idea.
We’ll help with the email.
Create an account. Choose your first email. Get guided through the setup.