Open-source API management platforms compared

The licensing boundary decides which parts of an API management platform you can run without a commercial agreement, so separate each vendor's repository license from the features its paid edition adds. Gravitee API Management is Apache-2.0 at the repository level, and its gateway, management API backend, Console UI and Portal UI are the components its README describes. The Enterprise Edition documentation states that the Enterprise Edition requires a license, and the features behind that license are the ones most likely to matter to an API program: Kafka publish and subscribe over HTTP and WebSocket, MQTT5, RabbitMQ, Solace and JMS endpoints, audit trails of API consumption and activity, data masking, Redis caching, and Agent-to-Agent, LLM and MCP proxies. If your design depends on any of these, budget for the license from the start and plan for the Community Edition as a narrower product.

WSO2 API Manager is Apache-2.0 licensed, and WSO2 sells commercial subscriptions that provide expert support, continuous product updates, vulnerability monitoring and access to the licensed distribution for commercial use. The subscription pays for support and updates, and the supplied facts do not say it gates features in the code, so confirm that point directly with WSO2. WSO2 states that its API Platform components are open source under Apache-2.0 except the Monetization module, so treat Monetization as commercial in any cost model. Tyk Gateway is licensed under the Mozilla Public License 2.0, except the ee folder, which sits under a separate commercial Enterprise Edition license (Tyk LICENSE.md). The full Tyk Self-Managed platform, which includes Tyk Dashboard, the Developer Portal, Tyk Pump, Redis and PostgreSQL, needs a license, and so does the Tyk Operator for Kubernetes-native declarative management.

Before you commit, run a component-by-component check. List every piece you intend to deploy, then match each one to the license that governs it: the Gravitee Enterprise Edition terms, the WSO2 product repository and subscription terms, and the Tyk license files with the ee folder. Mark anything outside Apache-2.0 or MPL-2.0 as commercial, including the Dashboard, Developer Portal, Operator and WSO2 Monetization module. Confirm the exact boundary against each vendor's current license files and the written terms in any quote, because editions and license files change between releases. Ask each vendor which components your architecture needs, and get the answer in writing before you design around an open-source assumption.

The cost of leaving an API management platform is usually higher than the cost of choosing one, so the switching plan belongs in the first evaluation. Policies, plugins and routing rules are the most expensive part to move, because each platform expresses them in its own model. A rate limit, JWT check or request transformation configured in the Gravitee Console, the WSO2 Publisher or the Tyk Dashboard is not a file you copy into another product. Before you commit, list every policy your APIs depend on, mark which ones are standard (authentication, quotas, IP filtering) and which are custom, and estimate the rewrite effort for each custom one on the target platform. Custom code also needs attention: Tyk plugins can be written in Python, JavaScript, Go or any gRPC-capable language, while WSO2 supports custom authenticators, policies and workflows. Confirm whether your custom code can run on the target or must be rewritten in its extension model.

The developer portal and API catalog are the second cost. Gravitee's Portal UI, the WSO2 Developer Portal and the Tyk Developer Portal each hold API documentation, subscriptions, application keys and onboarding content, and that content is only partly portable. Export your OpenAPI and AsyncAPI definitions in open formats, since these move between platforms with less rework than portal pages do. Subscriptions and consumer application credentials are the riskier part: consumers may need to re-register and rotate keys, which is a coordinated change for every client team. Ask each vendor what it exports for portal content, subscriptions and analytics history, in which format, and whether the export covers its own database or only the API definitions. The same question applies to Redis and PostgreSQL state in self-managed Tyk stacks. Identity, certificates and event endpoints add the last layers. Gateway-to-backend mTLS certificates, JWT issuers and client certificates must be reissued or re-trusted on the new gateway, and every token validation path needs testing against it. Event APIs follow the same pattern: Kafka, MQTT or webhook endpoints configured in one platform must be rebuilt in the other, and any Enterprise-only endpoint types you adopted (such as Gravitee's Kafka or MQTT5 entrypoints) will not carry over to a Community or open-source deployment.

The parallel-running period is where switching cost becomes recurring. During cutover, both platforms serve traffic, so you pay for two gateway tiers, two sets of licenses or subscriptions where applicable, and two analytics pipelines, while teams keep configuring APIs in both places. Plan the cutover route by API, starting with low-risk internal APIs, and define a rollback path for each. Before signing, ask for the vendor's written export and migration documentation, confirm which parts require a paid edition, and ask whether your data model will be locked to a hosted control plane. Also confirm which gateway configuration can be kept as version-controlled files, since that makes the next move far less painful. DeployOpen can scope this work as a fixed-scope migration plan, but the effort depends on your API count, custom policies and portal content, which should be inventoried first.