OpenRouter records 19,941,437 monthly visits with -6.2% month-over-month growth and Paid pricing. Thinkstack.ai records 917 monthly visits with -47.4% growth and Freemium pricing.
One API key for hundreds of AI models from every major provider
Build custom AI chatbots and agents trained on your own data
| Dimension / Metric | | |
|---|---|---|
| Official Domain | openrouter.ai | app.thinkstack.ai |
| Pricing Model | Paid | Freemium |
| Monthly Visits | 19.94M (19,941,437) | 917 (917) |
| MoM Traffic Delta | -1.33M (-6.2%) | -828 (-47.4%) |
| Primary Market & Share | 🇺🇸 United States (16.1%) | 🇺🇸 United States (48.2%) |
| Direct Visits / mo | 11.96M | 367 |
| User Rating | 4.8 | 4.1 |
| Supported Platforms | Website | Website |
One API key for hundreds of AI models from every major provider
Six hundred plus models for text, image, video, audio, transcription, embeddings, and reranking behind one OpenAI-compatible API.
Requests are rerouted to another provider on outages or rate limits by default, so you don't write custom retry logic.
The auto-router selects a model and provider per request using live marketplace performance and pricing data.
Track spend, tokens, and usage per model, provider, and team member in one place, including bring-your-own-key usage.
Build custom AI chatbots and agents trained on your own data
Create fully functional AI agents in seconds from a visual, no-code interface without engineering help.
Connect multiple data sources so the bot answers from your own documents, help content, and websites.
Automate customer actions and build autonomous systems that require minimal human oversight.
Move complex chats to live agents and collect structured data through chat-based forms.
Offers robust serverless inference and GPU clusters for open models, but features a narrower selection of proprietary models.
Offers robust serverless inference and GPU clusters for open models, but features a narrower selection of proprietary models.
Features adaptive LLM routing and automatic failover, but lacks OpenRouter's massive ecosystem of community-rated model endpoints.
Features adaptive LLM routing and automatic failover, but lacks OpenRouter's massive ecosystem of community-rated model endpoints.
SpecialistDelivers exceptional inference speed and high-throughput performance for open models, but focuses primarily on hosted weights rather than multi-provider aggregation.
Free / Open-sourceProvides self-hosted and Python SDK control over 100+ LLMs, but requires setting up your own infrastructure.
AI customer service that answers instantly and turns chats into revenue
AI customer service that answers instantly and turns chats into revenue
Custom AI agents trained on your documentation and knowledge base
Custom AI agents trained on your documentation and knowledge base
SpecialistLow-cost serverless inference APIs for 200+ open models
One unified API for 100+ AI models, with insurance when output disappoints
One unified API for 100+ AI models, with insurance when output disappoints
One API for fast, cost-predictable inference on LLMs and multimodal models
One API for fast, cost-predictable inference on LLMs and multimodal models
Aggregates hundreds of foundation models and agentic tools under one endpoint, but lacks OpenRouter's community popularity and extensive prompt tuning.
Delivers advanced enterprise observability, guardrails, and caching, but focuses more on governance than simple model aggregation.
Delivers advanced enterprise observability, guardrails, and caching, but focuses more on governance than simple model aggregation.
Provides unified API access and cost tracking across multiple AI providers, but supports fewer niche open-weight models than OpenRouter.
