Where your notes reveal new connections.

Most AI writing tools split the work across two windows: your draft in one, the AI in another, and time spent copying content between them. Moss is a different kind of writing app — an AI markdown writing environment where the agent works directly inside your document. It researches topics, proposes edits inline, proofreads your prose, and formats copy without you ever leaving the page. Writers who switch to Moss stop juggling a writing app and a chat window side by side. The AI is inside the draft. That's a meaningful difference when you're trying to stay in the flow of writing.

Moss's AI agent can search the web and write findings directly into your note, sources included. Ask it to find supporting data for a point you're making, summarize a competing perspective, or pull a few relevant quotes — and it writes the results in place, with a Sources section you can edit and cite from. Your research notes and your draft live in the same document, not across three browser tabs. This changes the rhythm of writing. Instead of stopping to open a new tab, search, find something useful, copy it, paste it, and reformat it — you stay in the draft and ask Moss. The AI handles the retrieval; you handle the thinking.

Highlight a paragraph and ask Moss to tighten it. Mark a section as rough and ask for a rewrite. Leave an inline comment asking for an alternative opening. Moss proposes changes on the page — you accept, reject, or iterate. This is closer to working with a real editor than using a chatbot. The revision happens in the document, not in a chat log you have to translate back into your draft.

Moss is a local-first markdown editor for writing. Every note is a .md file on your hard drive: readable in any text editor, shareable as a plain file, and not dependent on a company keeping your account active. iA Writer and Ulysses users will feel at home — the file-first philosophy is the same. The difference is the AI writing layer: Moss adds research, editing, and proofreading without asking you to give up local file ownership. No subscription required to start writing. No account required to access your files. If you stop using Moss, your writing is exactly where you left it.

Moss uses standard markdown. Write with standard formatting shortcuts, keep the raw .md files, and move your writing to any CMS, blog platform, or tool that reads markdown. Paste directly into Ghost, use your notes folder as the source for a static site generator, or hand the file off to a developer. No proprietary format, no export step, no reformatting required.

The best writing apps disappear. You stop thinking about the tool and start thinking about the work. Moss is designed with that in mind: a clean markdown writing environment, an AI agent that helps without interrupting, and files that go wherever you go. Whether you're working on articles, essays, scripts, or long-form drafts, Moss keeps the outline, the research, the draft, and the revisions all in one place.

Yes. Moss has a built-in AI agent that works directly inside your document: it researches topics, rewrites sections, proofreads, and formats copy without you ever leaving the page. Unlike ChatGPT or Claude.ai, where you copy-paste content back and forth, Moss edits the draft itself. You highlight a passage, the agent revises it. You ask a question, the agent researches and writes the answer directly into the note.

iA Writer and Ulysses are focused writing environments: minimal UI, distraction-free, excellent for drafting. Moss is an AI markdown writing app: the agent actively collaborates on your draft, researches topics, proposes edits inline, and proofreads. Your notes stay in local markdown files, just like iA Writer. But Moss adds a layer those apps don't have: an editor that can research, rewrite, and revise alongside you, without a separate chat window.

Notion and Google Docs are cloud-first: your writing lives on their servers and requires an account. Moss is local-first: your writing stays on your computer as plain .md files. No cloud account required, no subscription to access the core editor, and no risk of your drafts disappearing if the company changes its pricing. Moss's AI writing features are comparable, but the ownership model is fundamentally different.

No. Moss does not use your drafts, essays, or documents to train AI models. The AI agent processes your content to complete tasks (rewriting, research, proofreading) and doesn't retain it afterward. Your writing stays private. If you're a professional writer working on sensitive or unpublished material, you can connect your own Anthropic API key, and the same standard privacy protections apply directly.

Yes. There's no note length limit in Moss. Draft full articles, long essays, chapter drafts, or research papers in a single note. The AI agent can help you outline, expand sections, research supporting points, and tighten prose throughout, all inside the document. Many writers use Moss's inline comment system to leave revision notes alongside a draft as they work, creating a back-and-forth editorial layer right on the page.

Yes. Every note is a .md file on your computer. Open existing markdown files, work in them directly, and use Moss alongside any tool that reads markdown. iA Writer files, Obsidian notes, Bear exports: they all open in Moss as-is. Format in markdown, keep the raw files, and move your writing anywhere. Moss never converts to a proprietary format.

Not natively yet. Moss doesn't have a direct WordPress or Ghost integration. Since every note is a plain .md file, you can paste markdown directly into any CMS that accepts it, or use Moss's notes folder as the source for a static site generator like Hugo or Jekyll. Direct publishing integrations are on the roadmap.

Moss has a free tier that includes the full markdown editor and note management. AI features (the agent that researches, suggests edits, and proofreads) require a subscription or your own Anthropic API key. Core writing functionality is free and doesn't require an account to get started.

Your notes are never affected. Cancel your subscription and every note remains exactly where it is, on your hard drive, as plain .md files. The AI agent features pause, but your writing, your files, and your ability to read and edit notes are completely unaffected. No lock-in, no export step required, no data held hostage.

Yes. Notes live on your computer as plain markdown files. No account needed, no cloud sync required. Write anywhere — on a plane, in a cabin, in a coffee shop with unreliable wifi. The AI agent needs a connection when you use it, but the writing environment itself works completely offline.