Great products diefrom bad planning.
Manyfast turns your idea into a spec, user flow and wireframe
your AI coding tool can build from.
No credit card · 🔒 Your docs never train AI
“Show me how it actually helps.”
Real use cases, real deliverables
Defining a product every team
signs off on, in days not months.
With Manyfast
- 01Drops interview notes into one project.
- 02Generates the PRD, works the review flags.
- 03Updates the spec with engineers and designers.
Pinning down scope and non-goals
before the engagement starts.
With Manyfast
- 01Runs the client kickoff in Manyfast.
- 02Shares a link to sign off on scope.
- 03Hands the spec to the build team over MCP.
Turning your idea into a spec
you can start building today.
With Manyfast
- 01Shapes features in dialogue with the AI agent.
- 02Reads the user flow for missing screens.
- 03Hands the spec to an AI coding tool and builds.
Summary
An internal market intelligence hub — it pulls scattered external market information into one place, organizes it by company, and lets people review AI-written briefings before they go out.
Target Metrics
Move four numbers within the half.
- Time spent collecting market info: 12 hrs/week → 3 hrs
- Time to notice a competitor's move: 9 days on average → within 2
- Briefings carrying source citations: 40% → 100%
- Duplicate and false-positive alerts: 31% → under 10%
Context
Every team tracks competitors in its own spreadsheet today.
- The same company is written differently per team, so files won't reconcile
- When someone changes roles, the accumulated context disappears
- An AI summary pilot was rejected because it carried no source citations
Problem
Strategy & planning
- Teams read different files and hold different views of the same event
- Competitor moves surface late, through press coverage
Analysts
- Collection is manual and eats 12 hours a week
- Role changes leave no record of how judgments were made
Security & audit
- No record of who accessed which external material, or when
Solution
Declare collection rules per source, unify companies written differently, then layer change detection and briefings on top of that.
- Collection interval and failure handling are defined per source
- Auto-merge only above the threshold; the ambiguous band goes to a human queue
- AI summaries must carry source links and cannot ship before review
- Every access and share is logged
Non-goals
- Internal performance analytics — the existing BI covers this
- Demand and price forecasting — phase two
- Long-term storage of source originals — outside our licensing
One document everyone agrees on
One shared standard, ready to build
Trace how users move, catch gaps early
Screen layouts for review, in minutes
Excel, images and markdown, or plug into your AI tools and issue trackers over MCP
“Sounds good. But has it worked for anyone?”
Trusted by users
Every PM should try Manyfast at least once. My team often says it feels like a genuinely well-built tool, and I'd recommend it to fellow PMs. What stood out most was how quickly it structures your thinking.Read interview →
The friction of starting from zero dropped sharply. Even Excel export gave me a solid skeleton. I could add the tabs I needed and tidy up right away. Defining the product up front and sharing became dramatically faster.
During company-wide AX, non-developers often shipped without a spec, and we paid for it in maintenance. Manyfast set clear product standards, cut the churn, and got the team aligned in one language.
For startups competing globally, what matters most is 'speed' and 'logical completeness.' Manyfast removes the planning bottleneck so teams can focus on what matters. For teams that want to move fast and structured like Silicon Valley builders, it'll be a major asset.
For an enterprise POC collaboration, we ran the early product definition in Manyfast. Compared with past POCs, the time to define a product shrank by over 90%, so we could brief internal PMs and engineers much faster.
We tested it with a project that used to take two months. The AI framed the spec so well it almost felt unfair. Because we could produce first drafts much faster than the usual two to three weeks, we cut the time we spent on kickoff and early-meeting prep.
“Alright. A few questions before I start.”
Fair questions, straight answers
“Doubts cleared. So how do I start?”
Start free, right now
Core features are free. No credit card.
Start for free
When you need more, Pro gives you more credits and unlimited projects.
- 5,000 on signup + 3,000 daily
- AI chat with Manny, your AI PM
- Share via public link
- Export your planning docs
- Connect AI tools over MCP
- No credit card required
The productivity jump
Building the same product, with and without a spec.
Without a spec
2 monthsRework eats the schedule.
With Manyfast
1 daySpec first, build once.
Proportions are illustrative.
“Signed up. Now what?”
Don't go in blind
Three short videos to get your first spec shipped in minutes.
“Is everything I make in here safe?”
Protected at every layer
Your planning data stays yours. Here is exactly how.
Encryption at rest and in transit.
Every product document is stored with field-level encryption, and traffic is protected with TLS 1.3.
Group-level isolation, by design.
Role-based access control (RBAC) and per-organization logical isolation ensure data from other groups is never accessible.
Never used to train AI models.
Customer product data is technically prevented from being used in AI model training without consent.