Turn your skills into a business,
in one place.
Your personal co-founder takes you through a proven 14-step journey (Discover, Validate, Launch, Scale) so you always know the single next move.
- Free to start
- No card required
Grounded in peer-reviewed entrepreneurship research from leading institutions
Start with your idea, or find one.
Get a business plan for the idea you have, or generate an idea for free in under a minute.
A full business plan for your idea
See example plans, then get yours for $29 once or 200 credits. 10 investor-tested chapters, with sources and an appendix. 150+ sources, every key insight backed up.
One journey. Fourteen steps.
Built to compound.
Your co-founder walks you through the same four phases every founder runs, and remembers every interview, decision, and pivot along the way. Every step ends with one action. Finish it, and the next unlocks.
You can also choose to complete some steps in a different order.
- 01About you
- 02Ideation
- 03Market
- 04Key risks
- 05Interviews
- 06Verdict
- 07Business plan
- 08Live site
- 09MVP plan
- 10Legal & setup
- 11GTM
- 12Key metrics
- 13Raise
- 14Stay ahead
“Tell us about you, find your next idea.”
“Map the market. Talk to humans. Get a verdict.”
“Business plan, live website, MVP, legal.”
“30-day GTM, key metrics, raise money, stay ahead.”
Four ways your co-founder
does the work with you.
A partner that scans the market, designs the tests, calls the verdict, and ships the boring stuff, one clear step at a time.
A co-founder, not a chatbot
Most AI gives you a blank box and a blinking cursor. Your co-founder gives you a path (the same 14 steps every founder runs, across Discover, Validate, Launch and Scale) and does the work alongside you.
- One clear next action every day
- Progress auto-saves as you go
- Pivots never delete your work
The signals that matter to your idea, every morning
Real funding, launch, and demand signals. Filtered to your vertical and ideal customer.
We design the test, find the people, then give you a straight answer
Strong demand from ops managers, weak from founders. Drop the founder segment and re-test pricing before you build.
From validated idea to first paying users
Auto-drafted business case + live landing page & waitlist. One-sentence MVP plan, week-by-week roadmap.
“Your co-founder remembers everything you’ve decided, and grounds the next conversation on it.”
Every step you complete, every interview you log, every pivot you make: Fonda folds it into a working memory, so your co-founder picks up where you left off.
Founders who stopped guessing
and started shipping
Join thousands of entrepreneurs using Fonda's co-founder to turn their skills into thriving businesses.
The startup plan my co-founder generated was better than what I got from a $3,000 consultant. The financial projections alone saved me months of work, and it remembered every assumption when I came back to revise it. The best tool for entrepreneurs I've used.
“I had been thinking about starting my own business for a while but wasn't sure where to focus. Fonda helped me explore options. I eventually focused on HR consulting and turn it into a concrete plan. I really enjoyed the clean interface and exhaustive research.”
“I wanted to work for myself but wasn't sure how to position my skills. Fonda helped me think through potential businesses, and get a honest view on their feasibility. The journey is well structured, especially for new founders that don't necessarily know how to sequence a launch. I now run my own development studio since 5 months and enjoying it!”
“I thought I could do everything with usual AI tools, but actually Fonda was much stronger. It really makes deep research and backs up every claim. Having Marty that remembers everything and provides guidance was also a great help for me, I felt like I had a coach by my side.”
Pay for what you use.
One-off credit packs that never expire. No subscription.
Take one idea all the way to a Verdict, with credits to spare.
Get ValidateThe full journey for one idea, plus credits toward a second.
Get LaunchAbout three full journeys, for founders testing several ideas.
Get ScaleOr start free: 40 credits when you sign up, no card needed. Credits never expire.
Questions about building a startup
Everything you need to know about Fonda, the co-founder for entrepreneurs.
Ready to meet
your co-founder?
Your co-founder is waiting at step one. Tell it about you, and you’ll have your next move in minutes.