Comparison
Relm vs HubSpot
The all-in-one marketing platform that also has a CRM
HubSpot is a marketing suite first, CRM second. If you're building an AI product or an integration, you'll spend more time fighting seat limits, portal-scoped rate limits, and a fragmented API than shipping.
| Feature | Relm | HubSpot |
|---|---|---|
| API-first design | Yes — spec is the source of truth | Retrofitted on top of the dashboard |
| Idempotency-Key on POST | Yes, every endpoint | Partial, undocumented |
| Cursor pagination | Yes, uniform | Mixed: offset, cursor, token |
| MCP server for AI agents | Native, OAuth 2.1 | None |
| Signed webhooks + replay | Yes, HMAC-SHA256 + UI replay | Yes, no UI replay |
| Custom fields via API | One call, typed | Requires schema call per property |
| Pricing model | Per-workspace, unlimited seats | Per-seat + per-hub, adds up fast |
| OpenAPI spec | Public /openapi.yaml | Partial, out of date |