Best ClrStream Alternatives in 2026
Updated
20 tools from transactional email software ranked against ClrStream on the same published basis.
- 1ClrStream vs turboSMTP
- 2ClrStream vs Twilio Segment
- 3ClrStream vs Postmark
- 4ClrStream vs Mailchimp
- 5ClrStream vs MailerSend
- 6ClrStream vs Twilio SendGrid
- 7ClrStream vs EmailSuccess
- 8ClrStream vs Nuntly
- 9ClrStream vs ReachMail
- 10ClrStream vs Maileroo
- 11ClrStream vs ZeptoMail
- 12ClrStream vs Hyvor Relay
- 13ClrStream vs Mailchimp Transactional (formerly Mandrill)
- 14ClrStream vs MailsSetu
- 15ClrStream vs Netcore Email API
- 16ClrStream vs Posthawk
- 17ClrStream vs Reloop
- 18ClrStream vs Resend Broadcasts
- 19ClrStream vs Aritic Mail
- 20ClrStream vs Mailmark
ClrStream alternatives compared
| # | Tool | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | turboSMTP | 7.8 | Free plan | €14.95/mo | Android, API, iOS, Web |
| 2 | Twilio Segment | 7.5 | Free plan | $120/mo | Web, iOS, Android |
| 3 | Postmark | 7.4 | Free plan | $5/mo | API, Web |
| 4 | Mailchimp | 7.2 | Free plan | Free | Web, iOS, Android |
| 5 | MailerSend | 7.2 | Free plan | $5.60/mo | API, iOS, Web |
| 6 | Twilio SendGrid | 7.2 | Free plan | $19.95/mo | API |
| 7 | EmailSuccess | 7.1 | Free plan | API, self-hosted, Web, Windows | |
| 8 | Nuntly | 7.1 | Free plan | €10/mo | API, Web |
| 9 | ReachMail | 7.1 | Free plan | $8/mo | API, Web |
| 10 | Maileroo | 6.9 | Free plan | $10/mo | API, Web |
| 11 | ZeptoMail | 6.9 | API, Web | ||
| 12 | Hyvor Relay | 6.8 | Free plan | API, self-hosted, Web | |
| 13 | Mailchimp Transactional (formerly Mandrill) | 6.8 | No | $10/mo | Web |
| 14 | MailsSetu | 6.8 | Free plan | ₹399/mo | API, Web |
| 15 | Netcore Email API | 6.8 | Free plan | Free | API, Web |
| 16 | Posthawk | 6.8 | Free plan | $20/mo | self-hosted |
| 17 | Reloop | 6.8 | Free plan | $10/mo | self-hosted |
| 18 | Resend Broadcasts | 6.8 | Free plan | $20/mo | API, Web |
| 19 | Aritic Mail | 6.7 | $9/mo | API, Web | |
| 20 | Mailmark | 6.7 | $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 7.8 out of 10. The others here: Twilio Segment, Postmark, Mailchimp and 16 more.
What is the best free alternative to ClrStream?
turboSMTP 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.