API gateway concepts and patterns
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WSO2 API Manager is an established open-source API management platform used by enterprises worldwide. As the API management landscape evolves — with AI agent protocols, Kubernetes-native architectures, and stricter European regulations — some teams are evaluating alternatives that better align with their current requirements. This guide provides a feature comparison, migration approach, and practical guidance.
Migrating from a existing API gateway is one of the highest-stakes infrastructure projects an enterprise platform team can undertake. Done well, it eliminates years of accumulated technical debt, reduces licensing costs, and opens the door to AI agent integration. Done poorly, it disrupts production APIs and erodes trust with every team that depends on the platform.
This guide provides a vendor-neutral framework for planning and executing an API gateway migration in 2026 — covering assessment, policy translation, phased traffic migration, and the new requirements introduced by AI agents. Specific guidance for individual platforms (Broadcom Layer7, Software AG webMethods, Axway, Apigee) is linked throughout.
Migrating from Software AG webMethods API Gateway™ to an open-source alternative is achievable in 4-6 months using a phased, zero-downtime approach. This guide covers what makes webMethods migrations distinct — the Integration Server (IS) dependency, the Designer-based policy model, the IBM licensing entanglement — and provides a concrete roadmap for platform teams ready to act.