Mockoon vs Postman

Mockoon is a free, open-source tool for designing and running mock APIs locally. It supports OpenAPI and can fit into existing applications and API design workflows. Mock behavior can use dynamic templating, rule matching, JSON databases, proxy mode, webhooks, and TLS. The tool can record requests and responses from a real API to create mocks, and it supports proxying and integration testing. The open-source version permits unlimited mock APIs and routes, including parallel runs. Its CLI can run mocks in headless 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 that mock content and request data are not sent 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 or air-gapped networks. Team is listed at €10 a month, billed annually at €120/license/year, tax excluded. Eligible companies can request one 14-day self-hosted Pro trial with five license slots using a verified work email, without a payment method.

Postman is a platform for building, exercising, sharing, documenting, and monitoring APIs. Its API client handles multiple protocols and includes authentication, response inspection and visualization, variables, environments, and request history. For API design, it supports specifications, mock servers, importing definitions, multiple definition formats, and third-party integrations. Testing options include collection runs and automated, integration, performance, regression, and end-to-end testing, with Postman CLI also available. Listed integrations include Jira, Slack, GitHub, GitLab, Microsoft Teams, VS Code, Amazon API Gateway, AWS Secrets Manager, and 1Password Vault. Postman describes local secret protection, cloud detection, runtime resolution, and connections to secret-management services. Its stated compliance credentials include SOC 2 Type II, PCI DSS, HIPAA, GDPR, and others. It says customer data is not used to train its models and Enterprise teams control AI access and usage. The Free plan includes 50 AI credits. Solo is $9 a month, billed annually. Basic and Professional plans are closed to new customers; existing Professional customers retain their current plan and pricing.