The local editor and core document workflows are free, with GPT-5.6 Luna as the default model for 40 monthly agent requests. Pro adds more capacity, model choice, cloud writing, and collaboration.
Clear terms before you pay
Start without a card. If you upgrade, Stripe Checkout shows the exact billing terms before you confirm.
Choose your workspace
One product, three ways to work.
Every plan starts with the same local-first desktop workspace. Free includes 40 monthly agent requests powered by GPT-5.6 Luna.
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Free
A complete local writing workspace with a useful monthly AI allowance.
Free includes local project storage, Markdown, LaTeX, DOCX, spreadsheets, presentations, imports, exports, and 40 agent requests per month powered by GPT-5.6 Luna, the default model for Free accounts. Free users can also accept and view read-only shared cloud docs. Upgrade to Pro for more agent usage, other managed models, cloud writing and sharing, collaboration, and search tools.
Can I try Nebula Writer before upgrading?
Yes. The Free plan lets you try the local editor and included AI allowance without a credit card. Any current Pro trial or promotion will be shown in Stripe Checkout before you confirm; otherwise billing begins when you subscribe.
What AI models do you use?
GPT-5.6 Luna is the default model for Free accounts. Pro accounts keep Luna and can also choose from all other enabled managed models in the model picker, including Claude, Gemini, Kimi, and GLM options where available.
What cloud features require Pro?
Free users can accept and view read-only shared cloud docs. Creating cloud folders, writing shared documents, inviting collaborators, editor sessions, sync, snapshots, binary saves, and owned cloud storage require Pro.
Is my writing data secure?
Your writing stays on your device by default. AI features only send the selected context needed for the request, Python work runs in the local runtime, and we never train AI models on your content.
Can I cancel anytime?
Yes. You can cancel your subscription at any time. You'll retain access until the end of your billing period.
Ready when you are
Put your next project in a workspace built for real documents.