The free tier covers all essential calculators, including exit waterfalls and dilution models. The interface updates instantly, and CSV export makes sharing data simple for early-stage startups.
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5 Reviews
Reading the details, the core calculators seem free and unlimited, which is attractive. However, the API usage is capped at one hundred requests per month on the free plan. For someone running automated equity checks, that quota might vanish quickly before hitting the paid tier. The pricing structure mentions a per-call cost after the limit, but the exact threshold for switching plans is not entirely clear from the overview. One should verify whether the twenty-nine-dollar monthly plan offers sufficient volume for sustained integration before committing, as the transition from free to paid could disrupt automated workflows if the limits are tighter than expected.
The site clearly states that estimates are for planning only and not legal, tax, or financial advice. Users must verify all figures independently before relying on them for binding decisions, as the platform is not a share-issuance platform of record.
Foundily offers a remarkably clean interface for modeling startup equity. The deterministic engine handles SAFEs and dilution with precision, which is reassuring when projecting cap tables. While the free tier is generous, the distinction between a modeling tool and Carta’s issuance platform is worth noting. For founders needing quick, accurate calculations without enterprise onboarding, the utility is evident and the value proposition is strong.
Foundily delivers exact equity calculations without requiring enterprise onboarding. The deterministic engine ensures consistent results across all tools, making it ideal for founders modeling rounds and exits.
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About Foundily
Foundily is a startup equity modeling platform that provides free calculators for cap tables, SAFE notes, dilution, and exit waterfalls for founders. The service uses a single underlying math engine to power web-based calculators as well as an agent-callable API and MCP server, so that founders, investors, and AI agents can access the same figures. It supports both post-money and pre-money SAFEs with valuation caps, discounts, MFN provisions, and note interest, and models dilution across stacked SAFEs and priced rounds including option-pool shuffles. Foundily positions itself as a self-serve, no-signup alternative to platforms like Carta for modeling equity rounds and building fully-diluted cap tables.
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