Imposter vs MockServer
A side-by-side comparison of two self-hosted apps from related categories — licensing, setup difficulty, resource needs, and what each one replaces.
Not the right match-up?
Imposter
Scriptable, lightweight mock server for REST and SOAP APIs
VS
MockServer
Mock and proxy any system you integrate with over HTTP
| Feature | Imposter | MockServer |
|---|---|---|
| Category | Developer Tools & Git | CI/CD & Build |
| License | GPL-3.0 | Apache-2.0 |
| Language | Kotlin | Java |
| Setup difficulty | Easy | Medium |
| Min. RAM | 256 MB | 512 MB |
| Deployment | docker, binary | docker, kubernetes, binary |
| GitHub stars | — | ★ 4,933 |
| First released | 2016 | 2013 |
| Replaces | WireMock | WireMock |
Why pick each one
Choose Imposter if…
- Released under the GPL-3.0 license
- Easy to set up — beginner-friendly
- First-class Docker support for quick deployment
- Written in Kotlin
Choose MockServer if…
- Released under the Apache-2.0 license
- First-class Docker support for quick deployment
- Kubernetes-ready with Helm charts available
- Active community (4.9k GitHub stars)
Frequently asked questions
Is Imposter or MockServer better?
Neither is universally better. MockServer has the larger community, while Imposter is simpler to set up (easy difficulty). Choose based on the comparison table above and your own setup.
Are Imposter and MockServer free and open-source?
Yes. Imposter is licensed under GPL-3.0 and MockServer under Apache-2.0. Both can be self-hosted at no software cost.
Can I run Imposter and MockServer with Docker?
Imposter: yes. MockServer: yes.