Arcbase – understand what your startup equity is worth
Equity tax calculator for non-finance people, competes directly with Carta and spreadsheets.

Aggregates employee demand to pressure liquidity funds—nobody's done this angle before.
Startup employees facing equity decisions, especially post-layoff or during 90-day exercise windows
Carta · EquityZen · Forge Global
The site is meant to be a central resource for anyone navigating this. I included a Liquidity 101 section that explains the different financial vehicles because that information is hard to find in one place. I also built a Liquidity Provider Directory and a Compare Tool so people can see their options side by side.
The Equity Scenario Modeler is currently in beta. I would love feedback on the logic and the math from this community.
The real point of the site is the Waitlist. My goal is to aggregate enough demand to signal that we are a group worth competing for. If we can prove volume, we can force these funds to stop spending so much on ads and move them toward a flat monthly fee instead. This should lower the cost of liquidity for everyone.
I am happy to answer any questions about how the modeler works or the mission to commoditize these providers.
Equity tax calculator for non-finance people, competes directly with Carta and spreadsheets.
Gamifies dilution math better than dry Carta calculators, but likely linear.
Finally, a portfolio tracker that handles private equity and SAFEs properly.
Startup equity horror roguelike teaching ESOP manipulation through actual gameplay mechanics.
Multi-agent startup simulation is ambitious, but execution feels pre-alpha and outcome quality is unverified.
Startup team roleplay is creative but only 7 commits in—no shipped products or working demo yet.