Best API (Beat API) records 4,847 monthly visits with -18% month-over-month growth and Paid pricing. Flatkey records 49,134 monthly visits with -40.8% growth and Paid, Contact for Pricing pricing.
One OpenAI-compatible endpoint for OpenAI, Claude and Gemini models
One API key for frontier models, 1,000+ AI tools, and one invoice
| Dimension / Metric | | |
|---|---|---|
| Official Domain | apibest.ai | flatkey.ai |
| Pricing Model | Paid | Paid, Contact for Pricing |
| Monthly Visits | 4.85K (4,847) | 49.13K (49,134) |
| MoM Traffic Delta | -1.07K (-18%) | -33.92K (-40.8%) |
| Primary Market & Share | 🇺🇸 United States (82.9%) | 🇨🇳 China (69.9%) |
| Direct Visits / mo | 1.94K | 30.53K |
| User Rating | 3.8 | 4.1 |
| Supported Platforms | Website | Website |
One OpenAI-compatible endpoint for OpenAI, Claude and Gemini models
Send requests in the familiar chat-completions format to a single base URL, so existing OpenAI SDKs and wrappers work with minimal edits.
Reach OpenAI, Claude and Gemini models from the same credentials instead of juggling three separate accounts and billing setups.
Swapping providers usually means changing a base URL and a model name rather than rewriting application code.
Choose the model that best fits a task's price and quality needs, helping keep inference spend under control.
One API key for frontier models, 1,000+ AI tools, and one invoice
Point your existing SDK at Flatkey's router URL and select models by ID instead of managing a credential per provider.
Frontier chat models and 1,000+ pay-per-call tools share one auth layer, one balance, and one invoice.
Issue scoped keys per agent or environment, capped by spend and restricted to approved models and tools.
Requests route across five channel classes; when one degrades the router reroutes, backed by a 99.5% SLA document.
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Enterprise developer platform and API for deploying GPT-6 Astra, Sol, Luna, and realtime multimodal agents.
Free / Open-sourceOne API key for hundreds of AI models from every major provider
Free / Open-sourceOne API key for hundreds of AI models from every major provider
Free / Open-sourceOne OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control
Free / Open-sourceOne OpenAI-compatible gateway for adaptive LLM routing, guardrails, and spend control
Free / Open-sourceOne OpenAI-compatible API key for 500+ AI models
Free / Open-sourceOne OpenAI-compatible API key for 500+ AI models
Free / Open-sourceOne open-source AI gateway for 100+ LLM providers
Free / Open-sourceOne unified API for 100+ AI models, with insurance when output disappoints
Free / Open-sourceOne unified API for 100+ AI models, with insurance when output disappoints
One API key for hundreds of AI models
One OpenAI-compatible key for discounted GPT, Claude and Gemini access
Free / Open-sourceOne OpenAI-compatible API to route, monitor and control 250+ LLM models
Free / Open-sourceOne OpenAI-compatible API to route, monitor and control 250+ LLM models
Free / Open-sourceOne API key for 70+ AI models, 1,000+ data APIs and web tools
Free / Open-sourceOne OpenAI-compatible API for 200+ AI models
Free / Open-sourceOne OpenAI-compatible API for 200+ AI models
Free / Open-sourceOne API key, 600+ AI models, lower cost
Free / Open-sourceOne API key, 600+ AI models, lower cost
