Founder Tools

Free tools that move founders forward

Best-in-class calculators for startup founders, people looking for cofounders, and founders raising from investors. Free, instant, and genuinely useful — no sign-up required.

Calculators

Run the numbers in seconds — free, no sign-up.

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Cofounder Equity Split

Calculate a fair cofounder equity split based on commitment, idea, skills, capital and risk. A transparent, weighted model — free, no sign-up.

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Runway & Burn

Calculate your startup's runway and burn rate from cash, expenses and revenue. Model revenue growth, see your out-of-cash date and when you go default alive. Free.

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Dilution & Fundraising

See exactly how a funding round dilutes your ownership. Model the pre-money valuation, the investor's stake, the option-pool shuffle, and what you keep — free, no sign-up.

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Startup Valuation

Estimate a pre-money valuation range for a pre-revenue startup using the Scorecard and Berkus methods — transparent, investor-recognised, and free with no sign-up.

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Market Size (TAM SAM SOM)

Calculate your TAM, SAM and SOM the way investors expect — top-down or bottom-up. Get a defensible market size for your pitch deck. Free, no sign-up.

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Cap Table Simulator

Build your startup cap table and simulate how each funding round dilutes founders. Model pre-money, option pools and multiple rounds — free, no sign-up.

Coming soon

Startup Cost

Estimate the first-year cost of starting your startup by stage and category.

Generators

Turn a few inputs into a polished, shareable draft.

Coming soon

Startup One-Pager

Turn a few inputs into a polished, shareable startup one-pager you can save as a draft.

Coming soon

Job Description Writer

Generate a compelling startup job description from a few inputs and save it as a job draft.

Coming soon

Cofounder Search Post

Craft a compelling 'looking for a cofounder' post you can publish to the community.

Analyzers

Pressure-test your idea, market, and metrics.

Coming soon

Idea Validator

Pressure-test your startup idea against real signals and community feedback.

Why founders trust them

Not marketing fluff — real, credible utility

Transparent, not a black box

Every calculator shows its methodology and assumptions, so you can trust — and defend — the result.

Beautiful and instant

Fast, focused, no clutter. Results appear as you type — free, with no sign-up wall in your way.

Built for your journey

Made for founders, people seeking cofounders, and founders raising — by a team that lives this every day.

Foundersbase

Built for your whole founder journey

Foundersbase is where founders find cofounders, build their startup profile, hire, and connect with investors. Use the tools free — then create a free account to put the results to work.

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Free forever for founders. No credit card required.

  • Find & vet cofounders
  • Build your startup profile
  • Connect with investors