
Offers robust serverless inference and GPU clusters for open models, but features a narrower selection of proprietary models.

OpenFlowKit records 1,437 monthly visits with -70.3% month-over-month growth and Free pricing. OpenRouter records 19,941,437 monthly visits with -6.2% growth and Paid pricing.

The open-source diagramming studio for builders
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | openflowkit.com | openrouter.ai |
| Pricing Model | Free | Paid |
| Monthly Visits | 1.44K (1,437) | 19.94M (19,941,437) |
| MoM Traffic Delta |
| -3.41K (-70.3%) |
| -1.33M (-6.2%) |
| Primary Market & Share | 🇻🇳 Vietnam (92.4%) | 🇺🇸 United States (16.1%) |
|---|
| Direct Visits / mo | 614 | 11.96M |
|---|
| User Rating | 4.6 | 4.8 |
|---|
| Supported Platforms | Website | Website |
|---|

The open-source diagramming studio for builders
Paste a public GitHub repository and OpenFlowKit reads its files in the browser to draw modules and connections, with every arrow cited to the source line it came from.
29 diagram tools for Claude Code, Codex, Cursor, VS Code, Windsurf or any MCP client, so an agent can draw on the diagram you have open, one undo away.
Write or paste Mermaid, D2 or Structurizr; the text and the canvas remain the same diagram, so you can round-trip between syntax and visuals.
Move from system context to containers to components in linked views that all stay grounded in a single architecture model.
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.

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.
SpecialistDelivers exceptional inference speed and high-throughput performance for open models, but focuses primarily on hosted weights rather than multi-provider aggregation.
#3
Free / Open-sourceProvides self-hosted and Python SDK control over 100+ LLMs, but requires setting up your own infrastructure.

AI diagrams and technical design docs built from your code and systems

SpecialistLow-cost serverless inference APIs for 200+ open models

One unified API for 100+ AI models, with insurance when output disappoints

AI diagramming, mind mapping and project tools with 50,000+ templates
One API for fast, cost-predictable inference on LLMs and multimodal models
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations

Aggregates hundreds of foundation models and agentic tools under one endpoint, but lacks OpenRouter's community popularity and extensive prompt tuning.

AI-powered visual collaboration for diagrams, mind maps, and charts
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.
AI diagrams and technical design docs built from your code and systems
One unified API for 100+ AI models, with insurance when output disappoints
AI diagramming, mind mapping and project tools with 50,000+ templates
One API for fast, cost-predictable inference on LLMs and multimodal models
Free / Open-sourceOpen-source AI automation that unifies agents, flows and 770+ app integrations
AI-powered visual collaboration for diagrams, mind maps, and charts