Lemma
The PRD writing tool for product managers who ship.
PRDs shouldn't be painful
You've tried writing PRDs in Google Docs. The formatting is manual, the structure is inconsistent, and there's no intelligence built in. You end up spending more time wrestling with the document than thinking about the product.
Lemma is different. It's a purpose-built editor for product requirements — with AI that actually understands your documents.
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Write structured PRDs with a rich editor, get AI help that understands your document's context, and go from idea to spec in minutes — not hours.
What you get
A real editor
Lemma gives you a full-featured document editor with everything you need for product specs. Headings, tables, callouts, code blocks, checklists, images, and more — all with keyboard shortcuts and slash commands.
Organize your work in folders, upload existing docs (Markdown, HTML, or DOCX), and pick up right where you left off.
AI that edits with you
Lemma's AI sidebar isn't a generic chatbot. It sees your entire document, knows which paragraph you've selected, reads your comments, and makes targeted edits right where they belong.
Select a section, reference a comment, and ask: "please resolve my comments. also, shorten the selected paragraph". The AI understands the context and applies precise edits — no copy-pasting needed.
Wing It: from zero to PRD
Don't know where to start? Give Lemma a topic and hit Wing It. It researches the web, reads your existing docs for context, and drafts a complete PRD — structured with sections, success metrics, and technical considerations.
You answer a few quick-fire questions, then sit back while the research agent reads documents, searches the web, and writes your first draft. It's a starting point — not a final product — and you can refine it with the AI sidebar from there.
Context that persists
Define your product's constraints, terminology, and background knowledge in a Context document. This acts as a universal set of rules underlying every AI operation across your workspace — so the AI always knows your product's domain.
What's inside
Feature | Details |
|---|---|
Rich Editor | Headings, tables, callouts, code blocks, images, checklists, toggles, equations, and more |
AI Sidebar | Context-aware editing with selection, comment, and document awareness |
Wing It | Automated research + drafting from just a topic and a few questions |
Context Docs | Persistent product context that shapes all AI operations |
File Management | Folders, drag-and-drop, import (Markdown, HTML, DOCX), and export |
Comments | Inline comments with AI-powered resolution |
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Ready to write your next PRD? Sign up for free and start shipping better specs today.
Ready to write better PRDs?
Sign up for free and start shipping better specs today.
Get started for free