Stop building blind.
Describe your idea. Get a structured, stakeholder-reviewed PRD in 15 minutes, not 15 hours. Built for PMs who write specs and developers who just want to build the right thing.
Your PRD will appear here...
Sound familiar?
You spend days writing PRDs that engineering skims in 5 minutes. Requirements drift. Stakeholders disagree on what was decided. The PRD lives in a Google Doc nobody opens after sprint planning.
You dive into code, ship fast, then realize you built the wrong thing. Scope creeps because nothing was written down. Three weeks in, you can't remember why you made half those decisions.
Both problems have the same root cause: no structured thinking before building.
Idea to spec in 3 steps
No templates to fill. No blank pages to stare at. Just talk.
Talk through your idea
Pick a template or start blank. THIG asks the right questions, not all the questions. It adapts based on your answers and pulls context from your uploaded docs.
Get a real PRD, not AI slop
Your conversation becomes a structured PRD with user stories, technical specs, and stakeholder perspectives. An AI CPO scores it and tells you what's missing.
Ship it everywhere
Export to DOCX, Markdown, or clipboard. Generate developer specs, wireframes, launch blog posts, and demo scripts. All from one conversation.
Your PRDs will actually get read
Every feature designed for people who write specs for a living.
CPO-Level Review
Every PRD scored on completeness, clarity, feasibility, and user focus. Specific suggestions, not generic advice.
Stakeholder Perspectives
See your product through engineering, design, QA, security, and business eyes before the first meeting.
Version Control
Every edit tracked. Compare versions side by side. Never lose a decision or wonder what changed.
5 PRD Styles
Comprehensive. Technical. Business. Lean. Agile. Match your team's way of working.
Build the right thing the first time
Skip the 50-page doc. Get what you need to start coding with confidence.
Talk, Don't Write
No templates, no forms, no 50-page docs. Have a conversation. Get a spec. Start coding.
Dev Specs on Tap
Auto-generate technical specs, architecture diagrams, and user stories with acceptance criteria.
AI Wireframes
User flows, system architecture, data flow, sequence diagrams. Generated from your PRD in seconds.
Bring Your Own Key
Use your OpenAI or Anthropic API key. Full control over costs. No vendor lock-in on the AI layer.
Replace the chaos with structure
See why teams switch from scattered docs to THIG.
Under the hood
Knowledge Base Context
Upload your existing docs, specs, and reference files. THIG reads them and weaves that context into every conversation and generated document.
Launch Content Generator
One conversation produces a PRD, developer spec, blog post, press release, social media copy, email announcement, demo script, and changelog entry.
Real-time Collaboration
Share PRDs via secure links. No account needed for reviewers. See who's viewing. Get feedback inline.
What teams are saying
“Cut our PRD writing time from 3 days to 30 minutes. Engineering actually reads them now because they're structured and scored.”
“I used to start coding without a spec. Now I spend 15 minutes in THIG and save myself 2 weeks of rework.”
“The stakeholder perspectives feature alone is worth it. We catch design, QA, and security gaps before the first standup.”
Frequently asked
Start free. Scale when ready.
Your next product deserves a real spec.
Whether you're a PM who needs completeness or a builder who needs direction. Start your first PRD in under 15 minutes.