OpenAI
AI provider · bring your own key
Use your OpenAI key for contextual AI, prompts, and page-level assistance. Billed by OpenAI under your account.
Integrations
Works with the tools you already trust.
Myellin does not resell AI or lock you into a provider. Bring your own keys, sync where it makes sense, and keep everything else native.
Anthropic
AI provider · bring your own key
Connect Claude through your own Anthropic key and choose it per prompt or per action.
Google Gemini
AI provider · bring your own key
Bring a Gemini key for a third provider option — switch providers without changing workflows.
GitHub
Sync
Your Prompt Lab library syncs to a GitHub repository you control, versioned and reviewable like code.
Excalidraw
Canvas
Freeform sketching and systems diagrams inside boards, with the hand-drawn feel kept intact.
KaTeX & Mermaid
Editor
Typeset equations with KaTeX and render flowcharts and sequence diagrams with Mermaid, natively in notes.
A note on keys
Provider keys are stored in an encrypted vault and used only to run the actions you start. Myellin never proxies your usage through a hidden account, never resells tokens, and never trains anything on your notes. The subprocessors page lists every provider that may touch customer data.