Apidog vs Tessary
Apidog and Tessary 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
Open-source monitoring that finds why production AI agents fail
| Pricing | Freemium · $12 | Open source |
| Starting price | $12/mo | Not published |
| Free plan | Yes | Yes |
| Free trial | 14 days | — |
| Built for | Developers, Small businesses, Enterprise | Developers, Small businesses, Enterprise |
| Platforms | web, macos, windows, linux | web, linux |
| Country | — | — |
| 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 Tessary if
Engineering teams running AI agents in production with OpenTelemetry traces who want every trace checked and failures explained.
- Apache 2.0 open source with free self-hosting
- Checks every trace instead of a sampled subset
- RCA links failures to specific commits when a repo is connected
Look elsewhere if: Teams that want a mature, fully supported observability suite or an eval-first workflow (Datadog, Braintrust).
Apidog vs Tessary 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
Tessary
- Open Source$0Self-host with Docker Compose; all core features
- Cloud Free$010k traces/mo, 1 GB, 30-day retention, $10 one-time RCA credit
- PaidCustomCustom classifiers, managed dedicated instance, Slack support
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
Tessary · Key features
- Classifiers run on every production trace with no sampling
- Built-in checks for drift, tool errors, secret leaks and malformed output
- LLM triage groups real deviations into trackable cases
- Root-cause analysis over failing traces and your GitHub repository
- OTLP ingestion over HTTP and gRPC with OpenTelemetry gen_ai conventions
- PII redaction before traces are stored
Cons
- Very new project with a short track record
- Paid plan prices are not published
- Frustration classifier requires your own OpenRouter or TypeSafe key
Apidog vs Tessary: FAQ
Do Apidog and Tessary have a free plan?
Yes, both Apidog and Tessary have a free plan; paid plans add more usage and features.