Free plans only

8 Best Free Transactional Email Services of 2026

By the Rankozo research desk · Updated November 10, 2026

8 of the 10 tools in our best transactional email services ranking offer a permanent free plan. Resend scores highest among them at 8.9 out of 10.

1. 01

   Resend

   Developers who want a modern API, a usable free tier and the lowest paid price per 1,000 emails among the subscription plans here.

   Free plan with 3,000 emails a month (100 a day); Pro $20 per month with 50,000 emails; Scale $90 per month with 100,000 emails; extra emails $0.90 per 1,000

   Full entry, No. 1 overall

   Paid from

   $20

   Score 8.9

2. 02

   Postmark

   Product teams that want fast, well-documented transactional delivery and clear overage rates.

   Free developer plan with 100 emails a month; Basic $15 per month with 10,000 emails; Pro $16.50 and Platform $18 per month; extra emails from $1.20 per 1,000

   Full entry, No. 2 overall

   Paid from

   $15

   Score 8.5

3. 03

   Mailgun

   Teams that expect to grow into hundreds of thousands of emails and want falling per-1,000 rates.

   Free plan with 100 emails a day; Basic from $15 per month with 10,000 emails; Foundation $35 with 50,000; Scale $90 with 100,000

   Full entry, No. 4 overall

   Paid from

   $15

   Score 8.3

4. 04

   Brevo

   Small teams that want a daily free sending allowance and one account for transactional and marketing email.

   Free plan with up to 300 emails a day; Starter $9 per month from 5,000 emails; Standard $18 per month

   Full entry, No. 5 overall

   Paid from

   $9

   Score 8.2

5. 05

   Elastic Email

   Budget-minded developers who need 50,000 emails a month for under $20.

   Free plan with 3,000 emails a month (100 a day); Email API Starter $19 per month for up to 50,000 emails; Pro $49 per month

   Full entry, No. 7 overall

   Paid from

   $19

   Score 8.1

6. 06

   MailerSend

   Teams that want transactional email and SMS in one service with a cheap entry plan.

   Free plan with 500 emails a month; Hobby $6.30 per month billed yearly with 5,000 emails; Starter $31.50 per month billed yearly with 50,000 emails

   Full entry, No. 8 overall

   Paid from

   $6.30

   Score 8.1

7. 07

   Mailjet

   Developers and small teams who want the largest monthly free allowance and a template language.

   Free plan with 6,000 emails a month (200 a day); Starter $9 per month with 8,000 emails; Essential $19 and Premium $29 per month with 15,000 emails

   Full entry, No. 9 overall

   Paid from

   $9

   Score 8.1

8. 08

   SMTP2GO

   Teams that want a plain SMTP relay with human support and simple USD billing.

   Free plan for up to 1,000 emails a month; Starter $10 per month with 10,000 emails; Professional $75 per month with 100,000 emails

   Full entry, No. 10 overall

   Paid from

   $10

   Score 7.9

Scores and prices come from our Best Transactional Email Services ranking, which uses one method for every tool. Questions or corrections: editorial@rankozo.com