Collaboration & presence
Docs-style comments, sharing, and live cursors. You can even see when an agent is reading or editing the doc.
Docs · word processor
The word processor for writing with AI.
It sounds simple, but there's still no good place to write prose with AI. We were tired of waiting — so we built it. Docs-style collaboration, with agents you can actually see and control.
Start your free trial launch-essay.doc M J AI editing
DIFFUSION · FILLING 4 LINES J Tighten this paragraph — too wordy.
OUR FLASHIEST FEATURE
Diffusion
Write two sentences. Drag the diffusion box between them. Resize it to the number of lines you want. Then watch an actual diffusion model fill in the gap — connecting your two ideas, one pass at a time.
No prompt to write, no chat to babysit. Just the shape of the paragraph you want, filled in place.
YOU WRITE
The launch went live at 9am.
DIFFUSION · 3 LINES
By noon, we'd hit our first thousand signups.
DIFFUSION FILLS IN
The launch went live at 9am. Traffic climbed steadily through the morning as word spread across our community channels, and the team watched the dashboard fill up in real time. By noon, we'd hit our first thousand signups.
Everything you'd expect, done right
Good software first. AI woven through.
Partial updates
Highlight and share a precise portion with AI. The agent edits only that block — never regenerating the whole doc.
Change-by-change diffs
Every AI edit arrives as a reviewable diff. Accept or reject each change independently — nothing lands without your say.
Batch comments for AI
Review the whole document and leave comments as you go. The AI doesn't start working until you hit submit.
Custom rule reviews
Grammarly on steroids. Add your own rules and reviews; they run in parallel, grading your draft against dozens of objectives in seconds.
Diffusion
Drop a box between two sentences and let a diffusion model fill the gap in place. The flashiest way to write you've ever seen.
version history · launch-essay.doc
Explore freely
Branch, compare, and merge.
Not sure about a new direction? Branch the document, try it — or let an agent try it for you — and keep working without touching the original. Every version is saved, so you can always go back.
When a branch is better, merge it back in. When it isn't, throw it away. Experimenting never costs you your draft.
Reviews · running 6 rules in parallel 2.1s
Active voice pass
No hedging language 3 flags
Reading level < grade 9 pass
Brand voice: warm & precise pass
Every claim has a source 1 missing
Review, your way
Your rules. Evaluated in parallel.
Standard grammar tips are table stakes. Docs lets you add your own rules and reviews — house style, sourcing requirements, reading level, whatever matters to you.
Every rule runs at once, so a draft can be graded against dozens of objectives in seconds — not one slow pass at a time.
Use any agent
Our agent, or yours.
Docs ships with a thoughtful built-in agent. Prefer your own? Connect it through our MCP server, CLI, or SDK — partial updates, diffs, and batch comments all work the same.
Built-in agent
MCP server
CLI tools
SDK
Write your best, with or without AI.
From $20 a month, Viz included. Sign up in seconds, cancel anytime.
Start your free trial