In Forrester's 15-criteria evaluation of application programming interface (API) management platform vendors, Layer 7 and WSO2 — and their solutions — rose to the top, followed by Intel, Mashery, IBM, Vordel, and 3scale. None of the vendors we examined fielded a complete solution across all the subsystems, security models, service integrations, and form factors required, but that's not surprising in an emerging market. In fact, newly emerging standards and evolution of modern application architectures will keep this market in flux for the foreseeable future. This report details our current findings about how well each vendor fulfills our criteria and where they stand in relation to each other to help app development and delivery professionals select the right partner for API management.