Transactional and marketing senders. Daily caps and monthly caps are easy to mix up, so both are quoted when the page printed both.
Email 8
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Resend
Free
100 emails / day
A transactional email API with React Email support. The Free plan has a daily send cap, a few inboxes and a few custom domains. Open and click tracking is available on every plan, including Free.
3 inboxes and 3 custom domains on the Free column
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Mailgun
Free
100 emails / day
Email API and SMTP. The Free plan is $0 a month for trying the product, with a daily send cap, one sending domain and a short log window.
$0 / mo; 1 custom sending domain, 1 API key, 1-day log retention, ticket support
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Mailjet
Free
6,000 emails / month
API, SMTP and a campaign editor. The Free plan is $0 a month and states both a monthly and a daily email cap, plus a contact cap.
$0 / month; 200 emails per day, 1,000 contacts, APIs, SMTP relay and webhooks
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Plunk
Free forever
1,000 emails / month
Transactional mail, workflows and broadcasts with a simple two-plan price list. The free plan is labelled free forever and does not need a credit card.
No credit card; unlimited contacts, no per-email charge on the free plan
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EmailJS
Free
200 requests / month
Send email from the client via templates, without your own server. The Free plan is described as being for testing, with a monthly request cap and two templates.
$0 / mo; 2 email templates, requests up to 50 KB, limited contacts history
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Courier
Developer
10,000 sends / month
A notifications API that fans out to email and other channels. The Developer plan is free and includes a monthly send cap, Journeys, Broadcasts and the official SDKs.
Free; Journeys and Broadcasts, MCP server, CLI, all SDKs, SSO via Google or GitHub
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Mailtrap
Free
4,000 emails / month
Email testing and sending. The Free plan is $0 a month, with both a monthly and a daily cap, one domain and a short log window.
$0 / month; 150 emails/day, 1 user, 1 domain, 3 days of email logs
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Formspree
Testing
$0 / month
Form endpoints that forward submissions by email. The plans page lists a $0 monthly plan for testing and development; paid Personal starts at $15 a month.
Listed for testing and development; the plans page also offers a yearly option described as free for that testing plan
Nothing matches.
Other lists
When a limit changes
A short note when we re-check the list. No other mail.