OpenRouter

OpenRouter is a web and API platform for developers, startups, and enterprises that need one interface to access, compare, and run requests across 300+ AI models from 60+ providers.

Key capabilities include:

• Unified API (OpenAI SDK compatible) to call multiple LLM providers through a single endpoint, plus a chat experience for interactive use
• Routing and uptime optimization, including automatic failover and high-availability infrastructure to switch providers when one is unavailable
• Cost and governance controls such as activity logs, analytics, budgets, and spend limits, plus provider selection and prompt caching
• Enterprise controls including SSO/SAML, managed policy enforcement, and observability integrations (including Langfuse and Datadog)

Pricing: Freemium. Free tier includes 25+ models and 50 requests/day. Pay-as-you-go uses pass-through provider pricing with no inference markup, plus a 5.5% platform fee on credit purchases, no minimum spend. Enterprise offers custom, volume-based pricing with invoicing and higher limits.

Notable for combining multi-provider model access, centralized billing/authentication, and reliability-focused routing in a single developer-friendly API, including support for BYOK, crypto payments, and international VAT compliance.