Side by side
| Feature |  ChatRail | UltraMsg |
|---|---|---|
| Free tier | Included: Sandbox: 1 number, 500 messages a month, no expiry | Not included or not listed: No free tier; 3-day trial |
| Entry price (1 number) | $15 / month(Core, 1 number) | $39 / month(per instance) |
| Annual billing | 2 months free on annual billing | $390 / year(per instance) |
| Five numbers | $79 / month(Team includes 5 numbers) | $195 / month(5 × $39) |
| Message volume | Included: Unlimited on paid plans, with number-safety guardrails (a per-recipient limit that stops runaway loops) | Included: No platform message limit; they warn that bulk sending can get numbers blocked |
| Media and groups | Included: Images, video, voice notes and documents in and out; groups API | Included: Send media and documents |
| Webhooks | Included: Signed webhooks with delivery state and conversation context; media download URLs | Included: Receive messages via webhook |
| AI replies | Included: 10,000 AI replies a month included on Core + AI ($29), no API key needed; 50,000 on Team; or bring your own key | Included: Chatbot tutorials; no built-in AI replies listed |
| MCP | Included: MCP tools on Core + AI and Team | Not included or not listed: Not listed |
| No-code | Included: n8n, Zapier and Activepieces guides, plus an importable n8n workflow | Not included or not listed: Not listed on pricing page |
IncludedPartly, or you build itNot included or not listed
Trial: ChatRail's Sandbox is free with no expiry. UltraMsg: 3-day trial.
Choose UltraMsg if
- You have existing code built on UltraMsg's endpoints.
Choose ChatRail if
- Price: $15 vs $39 per number per month, and $79 vs $195 for 5 numbers.
- You want to build without a trial clock: Sandbox is free with no expiry.
- You want AI replies included, plus MCP tools.
- Guardrails enforce number safety in the product, not just warnings in the docs.
Switching
Both are REST APIs over a linked WhatsApp device, so switching mostly means pairing the number again and updating send calls and webhook handling. The quickstart covers pairing and your first message. Webhooks covers signature checks and media downloads.
Questions
How does ChatRail's price compare with UltraMsg?
ChatRail Core is $15 a month for one number. UltraMsg: $39 / month (per instance). For five numbers, ChatRail Team is $79 a month; UltraMsg: $195 / month (5 × $39).
Does UltraMsg include AI replies?
Chatbot tutorials; no built-in AI replies listed. ChatRail includes 10,000 AI replies a month on Core + AI ($29) and 50,000 on Team, with no API key needed.
Do both use the official WhatsApp Business API?
No. ChatRail and UltraMsg both connect a WhatsApp account as a linked device, so there is no Meta approval and no per-conversation fee. Linked-device sending must stay within WhatsApp's terms. ChatRail adds a per-recipient guardrail that stops runaway loops before they get the number reported.