Apidog vs Prism
Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
From $9 per user/month (Basic, billed annually; Professional $18, Enterprise $27)
Free tierFree and open source
Open sourceWhat drives the bill
The metric that actually scales your invoice.
Priced noticeably below Postman for comparable team functionality.
Free and open source. You pay in engineering time and CI minutes.
Free tier
Free plan for small teams with core design, mock and test features.
Everything, self-hosted
Open source
Apache-2.0
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Apidog · since 2022
Established
Stoplight (SmartBear) · since 2017
Strengths
- Schema-driven mocks and assertions stay correct as the API definition changes.
- Meaningfully cheaper than Postman for equivalent team features.
- One tool instead of three for design, mocking and documentation.
- The mock is generated from the spec, so it cannot silently diverge from the contract.
- Validation proxy mode checks that a real implementation matches its own spec.
- Zero configuration beyond having an OpenAPI file.
Limitations
- Younger vendor with a smaller community and fewer third-party integrations.
- Data residency and cloud storage need checking for regulated environments.
- Documentation quality is uneven in places.
- Useless without an accurate OpenAPI document.
- Limited stateful behaviour — it is spec-driven, not scenario-driven.
- Generated example data is uninteresting unless examples are in the spec.
Best for
Teams doing design-first API development who want mocks and docs generated from the spec.
Design-first API teams who want mocks that are provably in sync with the contract.
All of these integrate with: OpenAPI.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.