Great products diein bad planning.

Endless rework, vague specs, a team pulling in five directions. Manyfast turns your idea into a spec you can build from.

Used by 2,000+ product teams worldwide
PRD
0%
Overview
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 & Solution
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
Target Users
Primary user

Market analysts in the strategy office.

  • Track 15 or more competitors continuously
  • Write the weekly executive briefing themselves
Usage context

Used heavily the night before the weekly executive briefing and right after a competitor launch.

  • Latest moves get re-checked the night before the briefing
  • A launch dumps articles and reviews all at once

Moments you need Manyfast

Ethan Brooks

Solo founder

“I have an idea, but can't picture the product.”

With Manyfast

Just talk through your idea and Manyfast turns it into a PRD, user flows, and wireframes. Hand the finished spec to a developer the same day, or point Claude at it.

Emma Carter

Enterprise product manager

“Product definition alone, took us two months.”

With Manyfast

Get a first-draft spec developers actually like in a day. Multi-perspective review and dev-ready slots cut definition time by 90%.

Daniel Reyes

Agency CEO

“We shipped without specs, and paid the penalty.”

With Manyfast

Your team and your client read the same spec and speak the same language. One standard document prevents mismatched builds and rework.

A good spec is your project's compass.

01Quick start

Don't start from a blank page. Turn what you already have into a draft.

  • Start light with AI and a short questionnaire
  • Start from existing files: meeting notes, spreadsheets
  • Start from the AI conversations you already had

02High fidelity

Easy for developers to read, written from the business view.

  • Review from business, dev, and QA perspectives
  • Write detailed policies in dev-ready slots
  • AI flags missed edge cases and policies first

03Real-time collaboration

A living spec, built by the whole team.

  • Invite members and edit together
  • Share externally with a simple link
  • Comment without touching the document

04Context

It understands your product context and keeps everything consistent.

Stop re-explaining the background to ChatGPT or Claude every time. Make Manyfast the hub your planning runs through.

  • Your agent always thinks and writes inside your spec
  • Turn chat ideation straight into a structured PRD, feature spec, and user flow

05Workflow integration

Connect your tools and work faster with less friction.

MCP connects your spec straight into AI tools like Claude, Cursor and Lovable. No re-pasting or re-explaining, just pick up in the tool you already use.

  • Connect to MCP-ready tools like Claude, Cursor and Lovable
  • Reference the whole spec without copy-paste
  • Export to Excel, image, or Markdown when you're done

Build and manage the spec together with your team

Keep the whole trail of your team's decisions

Gather everything from meeting notes to final materials in one place, and see at a glance when, what, and why you decided.

Collaborate safely with version history

Every edit and change is recorded automatically, so you can always check who changed what, and when.

Your data is
protected at every layer.

Never used to train AI models.

Customer product data is technically prevented from being used in AI model training without consent.

No model trainingTechnically enforced

Encryption at rest and in transit.

Every product document is stored with field-level encryption, and traffic is protected with TLS 1.3.

Field-level encryptionTLS 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.

RBACOrg-level isolation

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 →
Il-gu Lee (Macbe)Product manager, 20 years
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.
Su-min SongPM, large enterprise (N)
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.
Peter ShinY Combinator (W20), 500 VC
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.
Younghak AhnCEO, Eventus
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.
In-jun ShinCEO, AI-SaaS company (SIJE)
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.
Do-hwan KimCEO, AX firm (Definite)
Honestly, it blew me away. It narrowed the gap between idea and execution. In community workshops, even non-developers shipped working prototypes in a day.
Read interview →
Jae-deok KimOperator, AI planning community
Mapping out the product before UI/UX got much easier. We skipped drawing wireframes by hand, moved into design and dev faster, and sharing docs smoothed developer collaboration.
Jae-hyuk HeoDirector, design agency
If you have ideas but can't picture the product clearly, try Manyfast. Manyfast bridges the gap from idea to execution. I was able to put down a lot of the overwhelming, tedious work.
Sang-gi Min (Class Binu)Solopreneur (Weenote)

Start without pressure

Core features are free. Upgrade when you need more credits and advanced capabilities.

Starter

Free

Get started effortlessly

  • 3,000 credits per day
  • Personal use · 3 projects
  • AI assistant chat
  • Write PRDs via MCP
  • 10 wireframes
  • 3 exports per project

Pro

20% off
$16/ mo

A dramatic productivity boost

  • 100,000 credits per month
  • Use up to 3 seats · Unlimited projects
  • Unlock smarter AI models
  • Unlock all MCP features
  • 10 free wireframes per day
  • Unlimited document exports

Team

25% off
$45/ mo

For teams that plan together

  • 100,000 credits per month
  • 5 seats included · Unlimited projects
  • Full history activity log
  • Apply meeting decisions to your specs
  • Share outside your group with edit access
  • Early access to new updates
See full pricing

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