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YC company brief / July 2026

B4Math is decision rehearsal software.

B4Math helps teams rehearse market reactions before making expensive business decisions.

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01

Problem

Founders make pricing, launch, ICP, positioning, market, and GTM decisions with incomplete pre-market signal. The cost arrives after commitment.

02

Insight

Teams already rehearse investor questions. Buyer and competitor reactions should be rehearsed before expensive business changes too.

03

Solution

B4Math turns one decision brief into a forecast memo: segment reactions, objections, weak assumptions, risks, scenario paths, and a seven-day validation plan.

04

Product

A working public simulator, deterministic no-key engine, optional server-side AI provider, private saved reports, dashboard, investor room, and administrator console.

05

Wedge

Founder pricing and launch decisions are frequent, painful, specific, and expensive enough to make the first artifact immediately useful.

06

Why now

Model capability and low-cost simulation make market rehearsal fast enough to become an operating habit, while founders need faster learning loops.

07

Market

Start with founders and early product/GTM teams. Expand into agencies, VC platform teams, and enterprise decision rooms.

08

Business model

Pilot-led pricing: Founder Pilot, Team Pilot, and Private Decision Room. Recurring revenue follows recurring decision volume and calibration.

09

Competition

Interviews provide observed language; analytics explains prior behavior; consultants provide bespoke judgment. B4Math owns the pre-commitment rehearsal artifact and connects it to the next test.

10

Moat

Forecast-to-reality calibration memory. Decisions, forecasts, experiments, and outcomes become company-specific priors and recurring error patterns.

11

Expansion

Comparison runs, team workflows, outcome logging, exports, integrations, API access, and portfolio-level decision intelligence.

12

Roadmap

Improve evaluation and calibration first, then collaboration, integrations, security controls, and company memory.

13

Founder

B4Math is founder-led around a direct product conviction: the output must help make a decision, not merely demonstrate model capability.

14

What we are looking for

Design partners with a real pricing, launch, ICP, positioning, market, or GTM decision and willingness to compare forecast against reality.