Best API Management Software

OpenRouter is a unified interface for large language models that gives developers and teams one API to access hundreds of models from 70+ providers. Built for AI app builders, startups, and enterprises, it simplifies model experimentation, routing, and deployment by letting you use an OpenAI-compatible SDK while switching between providers like OpenAI, Anthropic, Google, Meta, Mistral, and more. Its biggest value is flexibility: you can optimize for price, speed, uptime, or policy requirements without rewriting your integration for every vendor. OpenRouter also supports distributed routing with fallback options, helping maintain higher availability when a provider is slow or unavailable. With custom data policies, transparent usage-based pricing, and no subscription requirement, it is especially useful for teams that want to control costs and reduce operational overhead while building production-grade AI products, agents, and internal tools. Read OpenRouter Reviews

Edge Stack, formerly Ambassador Edge Stack, is a Kubernetes-native API gateway and ingress controller built on Envoy Proxy. It provides automatic TLS, authentication (including OAuth/OIDC), rate limiting, WAF integration and fine-grained access control at the edge of Kubernetes clusters, along with a graphical Edge Policy Console and a customizable developer portal with automatic OpenAPI documentation. Its core functionality is open source under the Apache 2.0 license, with some enterprise features such as SSO offered under a proprietary license.

Ambassador Labs was acquired by Gravitee in July 2025, and Edge Stack pricing and packaging are now managed through Gravitee's unified platform rather than a standalone Ambassador pricing page. Because the vendor's public pricing page now redirects to a general Gravitee product page without published tiers, exact current prices could not be independently verified.

Stoplight is an API design-first platform that lets teams create, prototype and document OpenAPI descriptions and JSON Schemas through a visual editor, reducing the need to hand-write specs. It includes automatically generated interactive documentation, hosted mock servers for parallel frontend and backend development, and style guide tooling to enforce consistency and governance across many APIs. Stoplight integrates with Git-based workflows so design artifacts can live alongside source code.

Stoplight was acquired by SmartBear in 2023 and continues to operate as a distinct product with its own paid plans, while some of its open-source tools have been integrated into SmartBear's SwaggerHub. Plans range from a limited free tier through Basic, Startup and Pro Team tiers billed per user, up to custom Enterprise agreements with SSO and dedicated support.

Zuplo is an API gateway and management platform built for developers, running on a global edge network with 300+ locations. It provides authentication (API keys, JWT, OAuth 2.0, OIDC, mutual TLS), rate limiting, and routing that can be customized in TypeScript, along with an automatically hosted developer portal generated from OpenAPI specs. Zuplo also includes an AI Gateway for routing, caching, and cost tracking across LLM providers, and an MCP Gateway for managing Model Context Protocol traffic.

The platform targets startups and companies that want to ship and monetize APIs quickly without operating traditional gateway infrastructure. It offers a free plan with 100K monthly requests, a paid Builder tier, and custom Enterprise plans with premium SLAs, SSO, and compliance support.

webMethods is an API management and hybrid integration platform originally developed by Software AG, covering API gateway, developer portal, API design, and runtime governance for REST, SOAP and OData APIs. In July 2024 IBM completed its acquisition of the webMethods and StreamSets business from Software AG for about 2.13 billion euros, and the product is now sold and supported as IBM webMethods; the original softwareag.com API product page no longer resolves.

IBM prices the broader webMethods Hybrid Integration suite, which includes API Management, application integration, B2B, managed file transfer and event streaming, using a shared credit model. The SaaS Standard Tier starts at $2,565 per month with unlimited connectors, users, and API definitions included, a free trial is available, and custom or perpetual on-premises licensing is still sold through IBM and its partners.

Azure API Management is Microsoft's hybrid, multicloud platform for publishing, securing, and monitoring APIs, made up of an API gateway, a management plane, and a developer portal. The gateway supports REST, GraphQL, WebSocket, and OData APIs with authentication, rate limiting, caching, and routing, while a self-hosted gateway option allows deployment outside Azure in hybrid or multicloud environments.

Azure API Management is offered across a Consumption serverless tier billed per call, classic Developer/Basic/Standard/Premium tiers, and newer Basic v2/Standard v2 tiers with a lower entry price and built-in virtual network support. The Consumption tier includes a monthly free allowance of calls, and new Azure accounts can start with a free trial credit.

Boomi is a cloud-native integration platform as a service that connects applications, data, and APIs across cloud, on-premises, and edge environments through a low-code, drag-and-drop interface. It bundles Integration, API Management, Data Integration, Data Hub, B2B/EDI management, and AI-assisted mapping through Boomi Suggest in one multi-tenant platform aimed mainly at mid-market and large enterprises.

The only publicly listed price is Pay-As-You-Go at $99 per month plus usage, with no contract and a 30 day free trial of the full platform. Integration, API Management, Data Hub, and Data Integration each ship in five editions from Standard through Enterprise Plus, all quote-based; real enterprise contracts commonly run from tens of thousands to well over $100,000 a year.

Tyk is an API gateway and management platform supporting REST, GraphQL, TCP, and gRPC protocols. Its open source Tyk Gateway is free to self-host forever with no feature lockout, offering authentication methods like OIDC, JWT, and basic auth, along with rate limiting, quotas, service discovery, load balancing, and circuit breakers for microservices architectures.

Paid plans add the Tyk Dashboard, developer portal, and advanced analytics, deployable to Tyk Cloud, self-managed infrastructure, or a hybrid mix. Tyk offers a 48-hour free trial of Tyk Cloud with full feature access and no credit card required. The Core tier is usage-based, Professional is flat-rate with unlimited requests, and Enterprise pricing is fully custom; none publish list prices.

Postman is an API platform used by developers to design, build, test, and document APIs from a single interface. It supports REST, GraphQL, gRPC, WebSocket, and MQTT requests, and organizes work into collections and workspaces that teams can share and reuse. Built-in scripting with pm.test() lets developers automate checks, while the Newman CLI runs collections inside CI/CD pipelines.

Beyond the API client, Postman offers API design and mocking, environment variables for managing configs across stages, automated monitoring, and AI-assisted features such as Agent Mode for generating tests and documentation. Pricing shifted in March 2026 to a simpler four-tier model, with the free plan now limited to a single user.

Kong is an API and AI gateway built for cloud-native, hybrid, and multi-cloud architectures. The open source Kong Gateway handles routing, load balancing, and health checking for RESTful APIs, and can be extended through plugins for authentication (JWT, OAuth, basic auth, ACLs), and now includes a universal LLM API for routing traffic to providers like OpenAI, Anthropic, and AWS Bedrock.

Kong Konnect is the managed control plane that adds a service catalog, real-time analytics, developer portals, and role-based access control on top of the gateway. Konnect offers enterprise functionality free for 30 days, after which the Plus tier is billed per gateway on a consumption basis and Enterprise is custom-priced with SSO, audit logs, and dedicated support.