Best ClrStream Alternatives in 2026
Updated
20 apps from transactional email software ranked against ClrStream on the same published basis.
- 1ClrStream vs turboSMTP
- 2ClrStream vs Mailchimp
- 3ClrStream vs Twilio Segment
- 4ClrStream vs Maileroo
- 5ClrStream vs MailerSend
- 6ClrStream vs Nuntly
- 7ClrStream vs Postmark
- 8ClrStream vs Resend Broadcasts
- 9ClrStream vs SMTP2GO
- 10ClrStream vs EmailSuccess
- 11ClrStream vs Hyvor Relay
- 12ClrStream vs Netcore Email API
- 13ClrStream vs Posthawk
- 14ClrStream vs Reloop
- 15ClrStream vs Twilio SendGrid
- 16ClrStream vs Mailgun
- 17ClrStream vs Pombo
- 18ClrStream vs ReachMail
- 19ClrStream vs Plunk
- 20ClrStream vs Mailmark
ClrStream alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | turboSMTP | 6.6 | Free plan | €14.95/mo | Android, API, iOS, Web |
| 2 | Mailchimp | 6.5 | Free plan | Free | Web, iOS, Android |
| 3 | Twilio Segment | 6.5 | Free plan | $120/mo | Web, iOS, Android |
| 4 | Maileroo | 6.4 | Free plan | $10/mo | API, Web |
| 5 | MailerSend | 6.4 | Free plan | $5.60/mo | API, iOS, Web |
| 6 | Nuntly | 6.4 | Free plan | €10/mo | API, Web |
| 7 | Postmark | 6.4 | Free plan | $5/mo | API, Web |
| 8 | Resend Broadcasts | 6.4 | Free plan | $20/mo | API, Web |
| 9 | SMTP2GO | 6.4 | Free plan | $8.33/mo | API, Web |
| 10 | EmailSuccess | 6.3 | Free plan | — | API, self-hosted, Web, Windows |
| 11 | Hyvor Relay | 6.3 | Free plan | — | API, self-hosted, Web |
| 12 | Netcore Email API | 6.3 | Free plan | Free | API, Web |
| 13 | Posthawk | 6.3 | Free plan | $20/mo | self-hosted |
| 14 | Reloop | 6.3 | Free plan | $10/mo | self-hosted |
| 15 | Twilio SendGrid | 6.3 | Free plan | $19.95/mo | API |
| 16 | Mailgun | 6.2 | Free plan | Free | Web |
| 17 | Pombo | 6.2 | Free plan | $29/mo | API, Web |
| 18 | ReachMail | 6.2 | Free plan | $8/mo | API, Web |
| 19 | Plunk | 6.1 | Free plan | Free | API, self-hosted, Web |
| 20 | Mailmark | 5.4 | No | $10/mo | API, self-hosted, Web |
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Questions about ClrStream alternatives
What is the best alternative to ClrStream?
turboSMTP, number 1 in transactional email software with a score of 6.6 out of 10. The others here: Mailchimp, Twilio Segment, Maileroo and 16 more.
What is the best free alternative to ClrStream?
turboSMTP is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.