Free forever. Pay for what you use.
Notes, projects and files cost nothing. Add AI when you want it, from five dollars, and every run shows its price before it starts. No card to start.
Start freeChoose the right fit for you
File storageNotes, PDFs and anything else you drop in, synced across your machines. AI runs and codespaces draw on credits, not storage.
Credits included10,000 credits is $1.00. Credits pay for AI runs, OCR and codespaces, at the rates on the model pricing page.
Note editor + calculatorWrite in Markdown and LaTeX. The editor runs calculations inline, fully offline. No AI involved.
Tiled tabs, for any screenSplit the window into tiles and arrange tabs to fit the screen. One layout for a vertical monitor, another for a widescreen.
PDF to note (OCR)Turns a scanned PDF into an editable note with OCR. Formulas come out as LaTeX, tables and figures stay in place. Scan once, and every AI question after that reads the note instead of re-running OCR.
PDF editor (OCR)Edits run on the OCR text, so OCR is required. Hand an AI agent one instruction and the agent applies it to the whole PDF. For example: translate every page or fill a form.
Sync across multiple devices
AI chatChat is billed per token at the rates on the model pricing page. Pro and Max pay 10% under the listed rates.
CodespacesA full Linux machine in the cloud, billed by the hour only while it runs.
Small 4 vCPU, 8 GB RAM, 240 GB SSD
Medium 4 vCPU, 16 GB RAM, 320 GB SSD
Large 8 vCPU, 16 GB RAM, 480 GB SSD
X-Large 8 vCPU, 32 GB RAM, 640 GB SSD
Bring your own API keyYou can bring your API keys from OpenAI, Anthropic, Openrouter, Deepseek and bring your subscription account for Claude Code, Cursor CLI and Codex.
Encrypted at rest with AES-256-GCMEncrypted in transit too.
Kept separate per account
Training on your workNo plan trains on your files, notes or conversations.
Cancel any time