Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
 Amazon SESOptimize your email communication with reliable, scalable, and secure solutions at competitive prices | ReviewsNone yetWrite one for Amazon SES | Lowest paid plan$0.16per 1,000 emails, for up to 10 million emails a monthEssentials, as of October 20, 2026 | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onSMTP | Main features
|
 BrevoOne AI-powered customer platform for all your marketing and sales needs | ReviewsNone yetWrite one for Brevo | Lowest paid planNot confirmed | Free planYes | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | |
 Elastic EmailEmail API and SMTP for scalable email infrastructure | ReviewsNone yetWrite one for Elastic Email | Lowest paid plan$19per month for up to 50,000 emailsStarter, as of October 23, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 LettermintA European transactional email service running on its own infrastructure, exclusively in the EU. | ReviewsNone yetWrite one for Lettermint | Lowest paid plan€10per monthStarter, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 MailerSendTeam-friendly email API for modern apps | ReviewsNone yetWrite one for MailerSend | Lowest paid plan$99.00per month, billed yearlyProfessional, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 MailgunTransactional email delivery service and API for developers | ReviewsNone yetWrite one for Mailgun | Lowest paid plan$15per month for 10,000 emailsBasic, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 MailjetEmail marketing software that's built for devs and loved by marketers | ReviewsNone yetWrite one for Mailjet | Lowest paid plan$9per month for 8,000 emailsStarter, as of October 23, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 MailtrapModern email delivery for developer and product teams | ReviewsNone yetWrite one for Mailtrap | Lowest paid plan$15per month for 10,000 emailsBasic, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | ||
 PlunkTransactional email, marketing campaigns, and automated workflows, all against one contact list | ReviewsNone yetWrite one for Plunk | Lowest paid planSee plans | Free planYes | Free trialNot confirmed | Public APIYes | Runs onSMTP | |
 PostmarkThe email delivery service that people actually like | ReviewsNone yetWrite one for Postmark | Lowest paid plan$15.00per month for 10,000 emailsBasic, as of October 20, 2026 | Free planYes | Free trialYes | Public APIYes | ||
 ResendEmail for developers | ReviewsNone yetWrite one for Resend | Lowest paid plan$20per month for 50,000 emailsPro, as of October 20, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs on | |
 SendGridCreate, send, and manage emails at scale through RESTful APIs or SMTP relay | ReviewsNone yetWrite one for SendGrid | Lowest paid plan$19.95per month, starting price, for 50,000 to 100,000 emailsEssentials, as of October 20, 2026 | Free planNot confirmed | Free trial60 days | Public APIYes | ||
| SMTP2GOEasily send and track all of your emails, and forget headaches with email delivery. | ReviewsNone yetWrite one for SMTP2GO | Lowest paid plan$15per monthStarter, as of October 28, 2026 | Free planYes | Free trialNot confirmed | Public APIYes | Runs on | |
| Zoho CPaaSReliable, secure, and compliant multi-channel communication platform. | ReviewsNone yetWrite one for Zoho CPaaS | Lowest paid planNot confirmed | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features |
From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
How this list is made
A tool is listed here only when we've confirmed on its own website that it has a public API. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed