Best Sidemail Alternatives in 2026
Updated
20 tools from transactional email software ranked against Sidemail on the same published basis.
- 1Sidemail vs Twilio Segment
- 2Sidemail vs Postmark
- 3Sidemail vs Mailchimp
- 4Sidemail vs MailerSend
- 5Sidemail vs Twilio SendGrid
- 6Sidemail vs Nuntly
- 7Sidemail vs Maileroo
- 8Sidemail vs Hyvor Relay
- 9Sidemail vs Mailchimp Transactional (formerly Mandrill)
- 10Sidemail vs Mailmark
- 11Sidemail vs Posthawk
- 12Sidemail vs Reloop
- 13Sidemail vs Resend Broadcasts
- 14Sidemail vs turboSMTP
- 15Sidemail vs Retarus Transactional Email
- 16Sidemail vs SMTP2GO
- 17Sidemail vs SocketLabs
- 18Sidemail vs EmailSuccess
- 19Sidemail vs Mailgun
- 20Sidemail vs Netcore Email API
Sidemail alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Twilio Segment | 7.5 | Free plan | $120/mo | Web, iOS, Android |
| 2 | Postmark | 7.4 | Free plan | $5/mo | API, Web |
| 3 | Mailchimp | 7.2 | Free plan | Free | Web, iOS, Android |
| 4 | MailerSend | 7.2 | Free plan | $5.60/mo | API, iOS, Web |
| 5 | Twilio SendGrid | 7.2 | Free plan | $19.95/mo | API |
| 6 | Nuntly | 7.1 | Free plan | €10/mo | API, Web |
| 7 | Maileroo | 6.9 | Free plan | $10/mo | API, Web |
| 8 | Hyvor Relay | 6.8 | Free plan | — | API, self-hosted, Web |
| 9 | Mailchimp Transactional (formerly Mandrill) | 6.8 | No | $10/mo | Web |
| 10 | Mailmark | 6.8 | No | $10/mo | API, self-hosted, Web |
| 11 | Posthawk | 6.8 | Free plan | $20/mo | self-hosted |
| 12 | Reloop | 6.8 | Free plan | $10/mo | self-hosted |
| 13 | Resend Broadcasts | 6.8 | Free plan | $20/mo | API, Web |
| 14 | turboSMTP | 6.8 | Free plan | €14.95/mo | Web |
| 15 | Retarus Transactional Email | 6.7 | No | — | API, Web |
| 16 | SMTP2GO | 6.7 | Free plan | $8.33/mo | API, Web |
| 17 | SocketLabs | 6.6 | No | $39.95/mo | API, self-hosted, Web |
| 18 | EmailSuccess | 6.5 | Free plan | Free | Web |
| 19 | Mailgun | 6.5 | Free plan | Free | Web |
| 20 | Netcore Email API | 6.5 | Free plan | Free | Web |
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Questions about Sidemail alternatives
What is the best alternative to Sidemail?
Twilio Segment, number 1 in transactional email software with a score of 7.5 out of 10. The others here: Postmark, Mailchimp, MailerSend and 16 more.
What is the best free alternative to Sidemail?
Twilio Segment is the best-ranked alternative with a free plan. 16 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked on what each maker publishes, the fullest spec sheet first: how deeply the product is documented, the platforms it runs on, a free tier or trial to test it, and its standing.