Top 10 AI API Proxies & Reverse Proxies for Developers in 2026

Managing multiple AI API keys is the new "dependency hell." You've got OpenAI, Anthropic, Google, Mistral, DeepSeek — each with their own SDK, billing, rate limits, and quirks. AI API proxies sit between your app and these providers, giving you a single endpoint, unified billing, and often better pricing. Some also add caching, logging, fallback routing, and access control. Here are the 10 best options in 2026, split into three categories: commercial , open-source , and self-hosted . Commercial AI API Proxies 1. OpenRouter URL: openrouter.ai Models: 300+ | Markup: 10-30% | Free tier: Yes The most popular AI API gateway. Aggregates models from every major provider into a single OpenAI-compatible endpoint. Great model variety, active community, solid documentation. Strengths: Largest catalog, OAuth for user-facing apps, free models available Weaknesses: Markup adds up at scale, no self-hosting, rate limits on free tier 2. Crazyrouter URL: crazyrouter.com Models: 300+ | Markup: Negative (