Cofounder
CO-OP IDLE STARTUP SIM

Co-found a startup.
Together.

Bootstrap a tech company from a garage to IPO — hire a team, ship websites, win users, and scale your servers. It keeps growing while you're away. And the best part? Run the whole company with a friend, live.

▶  Play free in your browser See how it works

No download · works on phone & desktop · get launch updates

THE TWIST

Most idle games are solo. This one isn't.

Invite a friend with a code and you both run the same company at the same time — hire, build, decorate, and grow together, with every move syncing live. One of you logs off? The startup keeps running. Come back to what you both earned.

👥Two founders, one company
Symmetric — you can both do everything.
⚡Live sync
See each other's hires, builds & decorating in seconds.
🌙Always-on
Offline-friendly: it grows for both of you while away.
THE LOOP

From a garage to IPO

A legible startup machine — every part feeds the next.

  1. 1

    Hire your team

    Developers make Code, Designers make Design, Marketers bring reach, Researchers unlock new tech. Seat them at desks in your office.

  2. 2

    Ship websites

    Spend Code & Design on features that pull in users and revenue. Pick a type — social, video, webshop, blog — and an engine to power it.

  3. 3

    Grow & scale

    Market to win users. Users need servers (with monthly upkeep). Mind your burn rate, take a loan if you're bold, optimize to host more.

  4. 4

    Go big

    Acquire rivals to absorb their users, hit milestones, then IPO for permanent Equity — and do it all again, faster.

A LOOK INSIDE

A real company, in your browser

Actual gameplay — not mock-ups.

Your team seated at desks in the isometric office, with live cash, valuation and revenue
Your team, your office — hire, seat them, and watch it grow.
Managing a website — features, a marketing budget, and optimization
Build features, market, and optimize each website.
The co-op panel — start a shared company or join a friend with a code
Start a shared company — or join a friend with a code.
WHAT'S INSIDE

Depth that respects your time

∞

Truly idle

Active when you're playing, growing when you're not. Return to offline earnings and a company that kept building.

⇄

Real co-op

Two founders, one live company. Friends-only, invite by code. The headline feature — not a bolt-on.

▦

Build a real office

Place desks, decorate, and upgrade Garage → Office → HQ. Your little team sits down and gets to work.

★

Garage to IPO

Prestige resets with permanent Equity, plus acquisitions, milestones, and a deep upgrade tree to chase.

▶

No install

One save, any modern browser — nothing to download. Mobile apps and a Steam release are on the way.

◎

Grounded, not gimmicky

A real modern-startup vibe and clean, readable systems — no meme noise, just a company you actually run.

THE PLAN

Where it's going

Live and playable now — with a lot more on the way.

NOW · PLAYABLE
  • Free to play on web
  • Single-player and live co-op
  • Offices, websites, servers, acquisitions, IPO
NEXT
  • Mobile apps — iOS & Android
  • More website types & features
  • Events, campaigns, and milestones
LATER
  • Steam release (premium)
  • Compete on a shared market
  • Deeper prestige & endgame
FREE TO PLAY

Free now — and free to keep playing

The browser & mobile game is free, for real. Steam will be a one-time premium. We never sell power you can't earn.

WEB & MOBILE
Freeforever
  • The full game — co-op and all
  • No account needed to play
  • Rewarded ads are opt-in — you choose
  • Optional supporter pack — cosmetic only
▶  Play free
STEAM · COMING
Pay oncepremium
  • The same game — buy it, own it
  • No ads, ever
  • Supporter pack included
  • Achievements, cloud saves & controller
Notify me at launch

No pay-to-win, ever. Anything you can buy is convenience or cosmetic — never power you couldn't earn by playing.

PLAY WITH A FRIEND

Co-op in three taps

No accounts, no setup — just a code.

1

Start a shared company

Open the Co-op tab and tap Start a shared company. You'll get a short invite code.

CF-AB3KZ

Share the code

Send it to your friend any way you like — text, Discord, whatever's handy.

3

Build together

They tap Join with code — and you're both running one company, live. Even when one of you is away.

▶  Start a company
QUESTIONS

Good to know

Is it free?

Yes — free to play right now in your browser. Mobile will be free with optional extras, and the Steam version will be a one-time premium. We never sell power you can't earn.

How does co-op actually work?

Invite a friend with a code and you both run one shared company, live. It's symmetric — you can both hire, build, decorate and grow, and you'll see each other's moves within seconds.

Do we both have to be online?

No. It's idle-friendly: the company keeps running and growing even when one (or both) of you is away — and you're notified of what your co-founder did.

Do I need an account?

No sign-up to play. Your progress saves automatically, and co-op just uses a short invite code.

What can I play it on?

Any modern browser — it runs best on desktop or Android today. Mobile apps and a Steam (premium) release are on the way; iPad / iOS support is improving.

Is it pay-to-win?

No. Monetization is opt-in and cosmetic / supporter-only — never power you couldn't earn by playing.

STAY IN THE LOOP

Get launch updates

You never need an account to play — this is optional. Leave your email and we'll ping you when the mobile apps and the Steam version land. That's it.

Only used for launch news. No spam, unsubscribe anytime.

Ready to build something?

Grab a friend, grab a code, and take a garage to IPO.

▶  Play Cofounder — free

🌐 Web — play now 📱 Mobile — soon 🎮 Steam — premium, coming

Plays best on a desktop or Android browser. iPad / iOS support is improving.