Apidog vs OpenMail
Apidog and OpenMail are both developer tools tools aimed at developers and small businesses. Both have a free plan.
All-in-one API design, testing, mocking and docs; a Postman rival
Email inboxes for AI agents, with replies pushed by webhook
| Pricing | Freemium · $12 | Freemium |
| Starting price | $12/mo | Not published |
| Free plan | Yes | Yes |
| Free trial | 14 days | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses |
| Platforms | web, macos, windows, linux | web |
| Country | — | LT |
| Rating | — | — |
Choose Apidog if
Small and mid-size engineering teams that want one spec-first tool for API design, debugging, testing, mocking and docs at a lower per-seat cost than Postman.
- Replaces several tools with one spec-first workspace
- Free for up to four users; paid seats cost less than Postman
- Imports Postman, Insomnia, OpenAPI, HAR, cURL and WSDL
Look elsewhere if: Companies whose main need is a polished public developer portal or strict design governance (ReadMe, Mintlify, Stoplight).
Choose OpenMail if
Developers building AI agents that need their own email address to receive, thread and answer mail.
- Built for receiving and replying, not only sending
- Each inbox has its own sending reputation
- Free plan needs no credit card
Look elsewhere if: Teams that mainly send marketing or transactional email at high volume (Resend, MachineMail).
Apidog vs OpenMail pricing
Apidog
- Free$0Up to 4 users; design, debug, test, mock and docs
- Basic$12/user/mo$9/user/mo billed annually; 3 custom domains
- Professional$24/user/mo$18/user/mo billed annually; unlimited change history
- Enterprise$27/user/moBilled annually; SSO, organizations; on-prem separately
OpenMail
- Free€0/mo3 inboxes, 3,000 emails/mo (100/day), 3 GB, openmail.sh addresses
- Pro€9/mo10 inboxes, 10,000 emails, custom domains; then usage-based
- EnterpriseCustomDedicated sending IPs, SSO, 1-hour SLA, custom DPA
Apidog · Key features
- Visual OpenAPI and JSON Schema designer with change history
- Request client for HTTP, GraphQL, gRPC, WebSocket, SOAP and SSE
- Postman-compatible pre and post scripts and database connections
- Visual test scenarios, scheduled runs and performance testing
- Schema-driven smart mocks, cloud mock and self-hosted runner mock
- Interactive API docs with custom domains and free readers
Cons
- Interface is dense and takes time for non-technical users
- Public docs portals are less polished than ReadMe or Mintlify
- Smaller community and plugin ecosystem than Postman
OpenMail · Key features
- One API call or CLI command creates a dedicated agent inbox
- Inbound mail delivered in real time over webhook or WebSocket
- Full email threading so agents reply in the same conversation
- PDF, CSV and image attachments parsed into plain text (extra cost)
- Allow and block rules per address or domain
- Custom domains with DKIM, SPF and DMARC on Pro
Cons
- Pricing page mixes $9 and €9; overage rates are in euros
- Free plan caps sending at 100 emails a day
- Free plan appends a "Sent with OpenMail" footer
Apidog vs OpenMail: FAQ
Do Apidog and OpenMail have a free plan?
Yes, both Apidog and OpenMail have a free plan; paid plans add more usage and features.