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API DESIGN IS HARDBuild beautiful APIsCollaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing.

Apigee is a free tools platform for developers and API providers to debug, test, protect and get analytics on APIs.

WSO2 provides the only 100% open source enterprise platform that helps to build, integrate, analyse and manage your APIs, applications, and Web services on-premises, in the cloud and on mobile devices.

Secure host your applications. Manage devices and updates. Track exceptions. Let Pushlink do the job.

apiman is an open source API management layer that streamlines repetitive tasks often required when providing an API, such as implementing security, throttling and billing.

Keep your employees productive on their favorite apps and devices—and your company data protected.

API Umbrella is an open source API management platform for exposing web service APIs. The basic goal of API Umbrella is to make life easier for both API creators and API consumers. How?

Axway software enables digital business to govern, secure and monitor all interactions; securing company data and ensuring regulatory compliance.

3scale provides an out of the box cloud API management platform and infrastructure for developers, and companies to securely open, control, manage, operate and monetize their API to third parties (e.g. developers, business partners, etc.).

Build APIs RapidlyQuickly define a new API and start building your endpoints in seconds. With our cloud offering you will immediately have a publicly available host serving up your API responses. Start by mocking your endpoints or jump right into connecting to other sources!

Mashery, the Leader in API Management, is the place for API-based business creation. Our guiding principles are trust, collaboration, and presence, in service of rapid, value-based business creation.