Best Transactional Email Software in 2026
Updated
In short: Mailchimp is ranked #1 of 41 as of 4 October 2026, ahead of Twilio Segment and MailerSend. The best-ranked option with a free plan is Twilio Segment. The lowest first paid tier on this page is Postmark at $5/mo.
When an application or service needs to send transactional messages, compare the listed delivery methods, event webhooks and delivery-log retention. Dedicated IP options, template choices and monthly send limits offer further points to assess against your sending workflow. Free-plan availability and paid-from pricing help with cost comparisons. Mailchimp, Twilio Segment and MailerSend are among the named options. Consider the volume you expect and the delivery details your integration needs, then use the listed features to compare how each software option supports that workflow.
41 transactional email software ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 Mailchimp iPhone + Android RecognisedPhone appDocumentedFree plan 7.8Free
- 2 Twilio Segment iPhone + Android RecognisedPhone appDocumentedFree plan 7.8$120/mo
- 3 MailerSend iPhone only RecognisedPhone appDocumentedFree plan 7.7$5.60/mo
- 4 Nuntly No phone app RecognisedPhone appDocumentedFree plan 6.4€10/mo Delivery methods: bothTemplate options: bothEvent webhooks: Yes
- 5 Postmark No phone app RecognisedPhone appDocumentedFree plan 6.4$5/mo
- 6 Reloop No phone app RecognisedPhone appDocumentedFree plan 6.4$10/mo Delivery methods: bothTemplate options: bothEvent webhooks: Yes
- 7 Twilio SendGrid No phone app RecognisedPhone appDocumentedFree plan 6.4$19.95/mo Delivery methods: apiTemplate options: both
- 8 Maileroo No phone app RecognisedPhone appDocumentedFree plan 6.3$10/mo
- 9 Posthawk No phone app RecognisedPhone appDocumentedFree plan 6.3$20/mo Delivery methods: bothTemplate options: bothEvent webhooks: Yes
- 10 Resend Broadcasts No phone app RecognisedPhone appDocumentedFree plan 6.3$20/mo
- 11 SMTP2GO No phone app RecognisedPhone appDocumentedFree plan 6.3$8.33/mo
- 12 Hyvor Relay No phone app RecognisedPhone appDocumentedFree plan 6.2Free
- 13 turboSMTP No phone app RecognisedPhone appDocumentedFree plan 6.2€14.95/mo
- 14 EmailSuccess No phone app RecognisedPhone appDocumentedFree plan 6.1Free Delivery methods: bothEvent webhooks: Yes
- 15 Mailgun No phone app RecognisedPhone appDocumentedFree plan 6.0Free
- 16 Netcore Email API No phone app RecognisedPhone appDocumentedFree plan 6.0Free Delivery methods: bothTemplate options: bothEvent webhooks: Yes
- 17 Pombo No phone app RecognisedPhone appDocumentedFree plan 6.0$29/mo
- 18 ReachMail No phone app RecognisedPhone appDocumentedFree plan 6.0$8/mo
- 19 Plunk No phone app RecognisedPhone appDocumentedFree plan 5.8Free
- 20 Mailmark No phone app RecognisedPhone appDocumentedFree plan 5.7$10/mo Delivery methods: apiTemplate options: code
- 21 Retarus Transactional Email No phone app RecognisedPhone appDocumentedFree plan 5.7 Delivery methods: bothEvent webhooks: Yes
- 22 Mailchimp Transactional (formerly Mandrill) No phone app RecognisedPhone appDocumentedFree plan 5.6$10/mo Delivery methods: bothTemplate options: bothEvent webhooks: Yes
- 23 Aritic Mail No phone app RecognisedPhone appDocumentedFree plan 5.5$9/mo Delivery methods: bothTemplate options: bothEvent webhooks: Yes
- 24 SendLayer No phone app RecognisedPhone appDocumentedFree plan 5.4$5/mo Delivery methods: bothTemplate options: codeEvent webhooks: Yes
- 25 Sendwithus No phone app RecognisedPhone appDocumentedFree plan 5.4
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which transactional email software is ranked first on Samsung Mobile US Press?
Mailchimp is ranked #1 of 41 with a score of 7.8. Twilio Segment is second and MailerSend third.
How many of these have a free plan?
19 of the 25 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, Postmark has the lowest first paid tier we found: $5/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.