Noddle is open-core:
🆓 Self-hosted — the core editor is MIT-licensed. Run it yourself, bring your own AI key (Claude/OpenAI/Gemini/OpenRouter). Try it at draw.noddle.dev or grab it on GitHub.
☁️ Cloud — board.noddle.dev adds accounts, team workspaces, sharing & real-time collab, version history, and built-in AI credits.
Free tier: 10 boards, no card required.