Traefik
The Cloud Native Application Proxy
API Development & Testing
Compare healthier or more active tools in the same use case using ToolVitals public evidence.
Why compare
Switching guide
Stronger current public-health signal than Apache APISIX.
Useful when portability and inspectability matter.
Public source signals exist, but ToolVitals has not verified the license class.
Ranked alternatives
The Cloud Native Application Proxy
Scalar is an open-source API platform: 🌐 Modern REST API Client 📖 Beautiful API References ✨ 1st-Class OpenAPI/Swagger Support
Python SDK, Proxy Server (AI Gateway) to call 100+ LLM APIs in OpenAI (or native) format, with cost tracking, guardrails, loadbalancing and logging. [Bedrock, Azure, OpenAI, VertexAI, Cohere, Anthropic, Sagemaker, HuggingFace, VLLM, NVIDIA NIM]
Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)
A unified AI model hub for aggregation & distribution. It supports cross-converting various LLMs into OpenAI-compatible, Claude-compatible, or Gemini-compatible formats. A centralized gateway for personal and enterprise model management. 🍥
The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.
Build product integrations with AI.
Fastest enterprise AI gateway (50x faster than LiteLLM) with adaptive load balancer, cluster mode, guardrails, 1000+ models support & <100 µs overhead at 5k RPS.
The Cloud-Native API Gateway and AI Gateway
The Developer Platform for Modern APIs
AI gateway, registry, and proxy for MCP, A2A, and REST/gRPC APIs.
Free, open-source local AWS emulator.