Trusted by founding teams who put the partnership first.

The operating system for cofounders — tasks, agreements, and fairness that protect what you're building together.

Build Without Breaking

align · agree · execute

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Watch how founding teams align, agree, and execute in one place.

The Problem

63% of startups fail due to cofounder conflict.

Not product. Not market. The team.

Out of every 100 startupsn = 100
63 break over the team37 everything else

How a partnership unravels

  1. 01 · Quietly

    Silent resentment builds

    Small frustrations compound into relationship-ending conflicts when left unaddressed.

  2. 02 · Then visibly

    Equity feels unfair

    Without clear contribution tracking, founders question if the split reflects reality.

  3. 03 · Then all at once

    Communication breaks down

    Misaligned expectations and unclear responsibilities create friction daily.

The Solution

Build trust with data, not assumptions

Everything cofounders need — from first agreement to launch day — visualized as living systems, not static feature lists.

01

Idea to tasks

Turn a raw vision into a structured, assignable workstream before anyone writes a line of code.

02

Smart agreements

Promises become a living, signed, versioned agreement — not a PDF that dies in a Drive folder.

03

Real contribution

Work from GitHub, Figma, Linear and Notion, balanced against equity so effort stays visible.

04

Silent founder radar

Problems are flagged before they harden into conflict — quiet signals, early interventions.

05

Tension seismograph

Track relationship tension over time so the partnership stays measurable, not assumed.

06

Guided launch

A checklist, directory submissions, and a community playbook — from ready to live.

07

Cofounder OS in every AI tool

Scoped MCP tools expose agreements, tasks, health, and vault to Cursor, Claude, and ChatGPT — with agent work attribution.

08

Verified startup profile

A public proof page — team, shipping velocity, signed-agreement badge, privacy toggles, and waitlist — not a pitch deck.

Integrations

One brain for your cofounder ops

FounderSync plugs into the tools your team already lives in, turns their signals into one shared source of truth — then serves it to every AI assistant over MCP.

  • GitHubCommits, PRs, reviews
  • SlackConversations, tone
  • NotionDocs, page edits
  • FigmaDesign iterations
  • Google CalendarMeetings, availability
  • LinearPlanned
  • StripePlanned
  • HubSpotPlanned
  • Search ConsolePlanned
FounderSyncCOFOUNDER OS
  • Claudevia MCP
  • ChatGPTvia MCP
  • Cursorvia MCP
  1. 01

    Connect

    One-click OAuth. Commits, docs, design files and meetings start syncing on their own.

  2. 02

    Understand

    Raw signals become contribution, fairness and relationship-health scores everyone can see.

  3. 03

    Act anywhere

    Ask about your team from Claude, ChatGPT or Cursor — FounderSync answers over MCP.

FounderSync MCP ServerEarly access

Your cofounder OS, inside every AI tool

Agreements, tasks, contribution data, team health and the vault — exposed to Claude, ChatGPT and Cursor through scoped MCP tools. Ask “is our equity still fair?” where you already work.

  • Scoped tools, read-only by default — write access when you opt in
  • Per-founder consent; team-level stats, never individual scores, by default
  • Agent work attribution — who prompted or shipped what
Works with
  • Claude
  • ChatGPT
  • Cursor
{
  "mcpServers": {
    "foundersync": {
      "url": "https://mcp.foundersync.io/sse",
      "headers": {
        "Authorization": "Bearer ${FOUNDERSYNC_TOKEN}"
      },
      "scope": "read"
    }
  }
}

claude › get_team_health()

✓ health 82 · equity drift low · 1 quiet-founder flag

Trusted by founding teams at

  • TechCrunch
  • Y Combinator
  • Stripe
  • Linear
  • Vercel
  • Notion
of silence before the Silent Founder Detector raises a flag
9days
syncing real contribution — GitHub, Slack, Notion, Figma, Calendar
5tools
AI-assisted mediation compared with a human mediator
$299vs $5K
pre-loaded in the launch hub, from Product Hunt to BetaList
300+directories
FounderSync helped us have the hard conversations early. We avoided months of silent resentment.
SCSarah ChenCo-founder, TechFlow
“The contribution tracking alone saved our partnership. We finally had objective data to discuss.”
MJMarcus JohnsonCTO, DataSync
“We wish we had this before our first startup failed. The agreement builder is incredibly thorough.”
ERElena RodriguezCEO, CloudBase

Pricing

Simple, transparent pricing

Start free, upgrade when your team grows.

Solo

For founders exploring ideas

$0/forever
  • 1 startup
  • Idea structuring tools
  • Cofounder search profile
  • Community access
  • Basic document vault
Start Free

Team

Recommended

For founding teams building together

$29/per month
  • Unlimited startups
  • Up to 5 cofounders
  • Smart agreements
  • Contribution tracking
  • Relationship health
  • Decision framework
  • Conflict resolution
  • Priority support
Start Trial

Enterprise

For accelerators and studios

Custom/contact us
  • Unlimited everything
  • White-label option
  • API access
  • Custom integrations
  • Dedicated success manager
  • SLA guarantee
  • Advanced analytics
  • Bulk onboarding
Contact Sales

Free to start. No credit card required.

align · agree · execute

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