Posting vs Prism Mock
A side-by-side comparison of two self-hosted developer tools & git options — licensing, setup difficulty, resource needs, and what each one replaces.
| Feature | Posting | Prism Mock |
|---|---|---|
| Deploy effort | Read-the-docs project | Under-an-hour setup |
| Health score | 76 · Good | 90 · Excellent |
| Category | Developer Tools & Git | Developer Tools & Git |
| License | Apache-2.0 | Apache-2.0 |
| Language | Python | TypeScript |
| Setup difficulty | Easy | Easy |
| Min. RAM | 128 MB | 128 MB |
| Deployment | binary, source | docker, binary |
| GitHub stars | ★ 12,443 | ★ 5,035 |
| First released | 2024 | 2017 |
| Replaces | Postman, Insomnia | Postman, Stoplight |
What are Posting and Prism Mock?
Posting
Posting is an open-source terminal-based HTTP client for building and sending API requests. It stores collections as YAML files for easy version control and integrates with command-line workflows.
- Terminal HTTP client
- YAML collections
- Keyboard driven
- Scriptable requests
Prism Mock
Prism is an open-source HTTP mock server and validation proxy that turns OpenAPI documents into working mock APIs. It can also validate live traffic against a specification for contract testing.
- OpenAPI-driven mocking
- Contract validation proxy
- Dynamic example responses
- CLI and Docker
Posting vs Prism Mock: key differences
Posting is written in Python, while Prism Mock is built with TypeScript. Prism Mock is the more established project (first released 2017), while Posting arrived in 2024. Posting has the considerably larger community, at 12,443 GitHub stars versus 5,035. Prism Mock lists first-class Docker deployment; Posting does not.
Why pick each one
Choose Posting if…
- Released under the Apache-2.0 license
- Easy to set up — beginner-friendly
- Mature project with 12.4k GitHub stars
- Written in Python
Choose Prism Mock if…
- Spec stays the source of truth
- Good for contract testing
Watch out for
- Requires an OpenAPI doc
- Mock realism is limited
Frequently asked questions
Is Posting or Prism Mock better?
Neither is universally better. Posting has the larger community; both share a easy setup difficulty, so the decision comes down to features and licensing.
Are Posting and Prism Mock free and open-source?
Yes. Posting is licensed under Apache-2.0 and Prism Mock under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Posting and Prism Mock with Docker?
Posting: check the project docs for container support. Prism Mock: yes.