Mockoon
Open-source API mocking with a desktop app and CLI, from a Luxembourg company, plus a self-hosted Pro plan
Quick Overview
| Company | 1kB SARL-S (doing business as Mockoon) |
|---|---|
| Category | Developer Tools |
| Headquarters | Luxembourg |
| Founded | 2017 |
| EU Presence | EU (Luxembourg) |
| Open Source | Yes |
| Pricing | Team plan: €10 per license per month (tax excl.), billed €120 per license per year. Annual billing, minimum 5 licenses. Enterprise plan: pricing on request (contact us, dedicated support with a 4-business-hour response). Prices are in EUR and exclude taxes. Checked on 13 November 2026. |
| Free Option | 14-day free trial for users with a valid work email, no credit card required |
| Replaces | Postman mock servers, WireMock |
Detailed Review
Mockoon is an API mocking tool, which puts it in a narrower corner of this page than GitLab, Gitea or TeamCity. It lets a developer define mock endpoints with rules and stateful routes, then run them from a desktop app, a command line tool or an embedded web application. Front-end and integration work can then continue before the real back end exists. The operator is 1kB SARL-S, registered in Luxembourg under business register number B257186 and trading as Mockoon.
The open-source core is free, and the paid Team plan is €10 per license a month, billed as €120 per license a year with a minimum of 5 licenses, excluding tax.
A 14-day trial is available with a work email and no credit card. Pro is self-hosted by default, so mock data stays on the customer's own infrastructure, and it adds role-based access control and an administrative and workspace audit trail. Enterprise pricing is on request and comes with a 4-business-hour support response.
Where it is weaker: Mockoon does one job, so it does not replace a Git forge, CI pipeline or API gateway such as Tyk. A hosted managed cloud exists only as an Enterprise option, not on the Team plan.
The annual Team plan needs at least 5 licenses, which is a poor fit for a solo developer who wants collaboration features. We could not confirm the open-source licence name, a hosting location or certifications for the managed cloud from the pages we opened.
What Mockoon does well
- Free open-source core with desktop app and CLI
- Team plan includes all of Mockoon's open-source features
- Pro is self-hosted by default, so mock data stays on your infrastructure
- Pro adds role-based access control and an audit trail
- Priced in euros with a clear €10 per license a month rate
Where Mockoon falls short
- Covers API mocking only, not source hosting or CI
- Managed cloud is available only on the Enterprise plan
- Annual Team billing needs a minimum of 5 licenses
- No hosting location or certification stated for the managed cloud
Standout feature. It keeps API mocks free and local, with a paid self-hosted Pro plan, rather than tying mocking to a hosted subscription.
Pros and Cons
Pros
- Free open-source core with desktop app and CLI
- Team plan includes all of Mockoon's open-source features
- Pro is self-hosted by default, so mock data stays on your infrastructure
- Pro adds role-based access control and an audit trail
- Priced in euros with a clear €10 per license a month rate
Cons
- Covers API mocking only, not source hosting or CI
- Managed cloud is available only on the Enterprise plan
- Annual Team billing needs a minimum of 5 licenses
- No hosting location or certification stated for the managed cloud
Alternatives to Mockoon
Frequently Asked Questions
What is Mockoon?
Mockoon is an API mocking tool, which puts it in a narrower corner of this page than GitLab, Gitea or TeamCity. It lets a developer define mock endpoints with rules and stateful routes, then run them from a desktop app, a command line tool or an embedded web application. Front-end and integration work can then continue before the real back end exists. The operator is 1kB SARL-S, registered in Luxembourg under business register number B257186 and trading as Mockoon.
Where is Mockoon based?
Mockoon operates from Luxembourg, which places it under EU (Luxembourg).
What does Mockoon cost?
Team plan: €10 per license per month (tax excl.), billed €120 per license per year. Annual billing, minimum 5 licenses. Enterprise plan: pricing on request (contact us, dedicated support with a 4-business-hour response). Prices are in EUR and exclude taxes. Checked on 13 November 2026.. 14-day free trial for users with a valid work email, no credit card required.
Who is Mockoon best for?
Developers who need mock APIs without a SaaS. It keeps API mocks free and local, with a paid self-hosted Pro plan, rather than tying mocking to a hosted subscription.
What are the drawbacks of Mockoon?
Covers API mocking only, not source hosting or CI. Managed cloud is available only on the Enterprise plan. Annual Team billing needs a minimum of 5 licenses. No hosting location or certification stated for the managed cloud.
Is Mockoon a good alternative to Postman mock servers?
Mockoon is built as a European alternative to Postman mock servers: Open-source API mocking with a desktop app and CLI, from a Luxembourg company, plus a self-hosted Pro plan. It will not be a like-for-like feature match in every respect, so check the review above for where the two genuinely differ before switching.
How does Mockoon compare to other Developer Tools?
Mockoon is one of several European Developer Tools we cover. It is most often compared with Postman mock servers, WireMock.