Mockoon

Name: Mockoon
Price: 10 EUR

Free plan APILinuxMacSelf-hostedWebWindows

What Mockoon is

Mockoon is a free, open-source tool for designing and running mock APIs locally. It supports the OpenAPI specification and fits into existing applications and API design workflows. You can create mock behavior with dynamic templates, rule matching, JSON databases, proxy mode, webhooks, and TLS. It can record requests and responses from a real API to create mocks, and supports proxying and integration testing. The open-source version allows unlimited mock APIs and routes to run in parallel. Its command-line interface can run mocks in automated environments such as CI, GitHub Actions, and Docker; mocks can also run in serverless environments including AWS Lambda and GCP/Firebase Functions. The desktop app stores mocks locally, works offline without an account, and reports no mock content or request data to Mockoon. Pro adds real-time team collaboration, synchronized mocks, and deployment management on private infrastructure. It can be self-hosted on-premises, in a private cloud, or on isolated networks. The free plan is available, with paid options from $100/mo (annual).

Who it suits

Mockoon suits developers who need local API mocks for design, proxying, or integration testing, including teams that automate mocks or need private deployment. Its offline desktop app may suit users who want to work without an account.

What it does well

Unlimited mock APIs and routes in the open-source version
Supports OpenAPI and existing API workflows
CLI can run mocks in CI and Docker
Desktop app works offline without an account
Pro supports private and isolated deployments

What to know first

Real-time team collaboration is a Pro feature

Limits

The open-source version allows unlimited mock APIs and routes, including parallel operation. Eligible companies can request one 14-day self-hosted Pro trial with five license slots.

Plans

Plan	Billed and limits	Price
Team plan	€120/license/year; annual billing; tax excl. · €10/license/month · Flexible license slots for users or running mock instances · Self-hosted	€10 a month
Enterprise plan	Contact for pricing · Large teams and organizations · Optional managed cloud deployment · Custom bandwidth and SLA	On request

As mockoon.com lists them, read 4 Oct 2026. The maker's own page has the final word.

Getting started

Visit https://mockoon.com/.
Choose a supported platform: API, Linux, macOS, self-hosted, web, or Windows.
Start with the free plan, or review the paid plans.
Eligible companies can request a 14-day self-hosted Pro trial using a verified work email; no payment method is required.

Verdict

Mockoon covers local mock creation as well as automated, serverless, and private deployment workflows. The open-source version includes unlimited APIs and routes; collaboration and deployment management are available with Pro.

Questions

Is Mockoon free?

Yes. Mockoon has a free plan, and its open-source version allows unlimited mock APIs and routes that can run in parallel.

What does Mockoon cost?

Paid plans start at $100/mo with annual billing. The Team plan is €10 per license per month, billed annually at €120 per license per year, excluding tax; Enterprise pricing is available by contacting Mockoon.

Which platforms does Mockoon support?

Listed platforms are API, Linux, macOS, self-hosted, web, and Windows.

Can I try Pro before paying?

Eligible companies can request one 14-day self-hosted Pro trial with five license slots using a verified work email, without a payment method.

Is Mockoon open source?

Yes. Mockoon is open source; the open-source version supports unlimited mock APIs and routes, including parallel runs.

What does Mockoon Pro add?

Pro includes real-time team collaboration, synchronized mock APIs, and deployment management on private infrastructure. It can be self-hosted on premises, in a private cloud, or on isolated or air-gapped networks.

Facts from Mockoon's own pages

API workflow: It supports the OpenAPI specification and is designed to fit existing applications and API design workflows. · mockoon.com, 4 Oct 2026
Automation: The CLI can run mocks in headless and automated environments, including CI, GitHub Actions, and Docker containers. · mockoon.com, 4 Oct 2026
Compliance: Mockoon says it supports customers operating under GDPR, CCPA, the UK Data Protection Act, and PIPEDA. · mockoon.com, 4 Oct 2026
Founded: 2017 · mockoon.com, 28 Sept 2026
Maker: Mockoon was created in 2017 by Guillaume, its founder and main maintainer, with help from community contributors. · mockoon.com, 4 Oct 2026
Mock behaviors: Features include dynamic templating, rule matching, JSON databases, proxy mode, webhooks, and TLS support. · mockoon.com, 4 Oct 2026
Open-source limits: The open-source version allows unlimited mock APIs and routes and can run them in parallel. · mockoon.com, 4 Oct 2026
Platforms: Desktop downloads are listed for Windows, macOS, and Linux, with Linux packages for x86_64 and arm64. · mockoon.com, 4 Oct 2026
Privacy: The desktop app stores mocks locally, works offline without an account, and reports no mock content or request data to Mockoon. · mockoon.com, 4 Oct 2026
Pro collaboration: Mockoon Pro supports real-time team collaboration, synchronized mock APIs, and deployment management on private infrastructure. · mockoon.com, 4 Oct 2026
Pro deployment: Mockoon Pro can be self-hosted on-premises, in a private cloud, or on an isolated or air-gapped network. · mockoon.com, 4 Oct 2026
Purpose: Mockoon is a free and open-source tool for designing and running mock APIs locally. · mockoon.com, 4 Oct 2026
Serverless: Mock APIs can run in serverless environments such as AWS Lambda and GCP/Firebase Functions. · mockoon.com, 4 Oct 2026
Support: Team includes next-business-day email support; Enterprise offers dedicated support with a four-business-hour initial response time. · mockoon.com, 4 Oct 2026
Testing and recording: It can record requests and responses from a real API for auto-mocking, and supports proxying and integration testing. · mockoon.com, 4 Oct 2026
Trial eligibility: Eligible companies can request one 14-day self-hosted Pro trial with five license slots using a verified work email, without a payment method. · mockoon.com, 4 Oct 2026