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Theorem (YC X25) — Program verification so even your systems engineers can vibecode

Theorem appears in Y Combinator's company directory in the Spring 2025 batch, listed 2025-05-19. Program verification so even your systems engineers can vibecode.

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Theorem: Accepted into Y Combinator Spring 2025

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Theorem

New accelerator entry · 2025-05-19 · the record

Spring 2025
batch
4
people
Early
stage
United States of America
region
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In their words

Theorem is training models that make program verification 10,000 times faster. Using verification as a feedback loop, developers have found zero-days in GPU accelerated code and cryptography implementations, and sped up code migration in legacy systems. If you have complicated code that needs to be correct and secure, sign up for our beta!

What the record says

BatchSpring 2025
Announced2025-05-19
StageEarly
StatusActive
Team size4
IndustryB2B
Sub-industryB2B -> Engineering, Product and Design
SectorsMachine Learning
RegionsUnited States of America, America / Canada
BasedSan Francisco, CA, USA
HiringYes
Sitehttps://theorem.dev
Previously known asAletheia

The full profile

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If you're behind Theorem: acceptance into a YC batch is one of the few weeks a young company gets looked up by people who matter — investors, other founders, press. FoxPlug turns the commits, deploys, and releases you're already making into that story automatically, so anyone who looks finds something current. FoxChat puts a guide on your own site so the people YC's own page just sent you don't read one line and leave.

Sourced from the company's Y Combinator directory entry.

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Permanent URL: https://mentionfox.com/funding/yc-theorem-2
Last updated 2026-09-26
Primary record: Y Combinator directory entry
Theorem (YC X25) — Program verification so even your systems engineers can vibecode. MentionFox, 2026-09-26. https://mentionfox.com/funding/yc-theorem-2