YC Summer 2026 (S26) company

Archal

The improvement loop for AI agents

About Archal

Modern AI agents can send emails, change code repos, and talk with external APIs. Archal verifies your agent takes the right actions, and opens a fix PR when it doesn't.

Public traction evidence

Each signal links to the public source used for attribution.

  1. X

    Archal public launch post

    Official Archal account introduced Archal publicly as a deterministic eval platform for AI agents.

  2. LinkedIn

    They ain't believe in us... GOD DID 🗣️🗣️ ‼️ Excited to announce that Archal is backed by Y Combinator! Noah and I used to laugh at headlines of AI agents breaking production databases. Now we're… | Aidan Tiruvan | 45 comments

    GOD DID 🗣️🗣️ ‼️ Excited to announce that Archal is backed by Y Combinator! Noah and I used to laugh at headlines of AI agents breaking production databases.

  3. X

    yc founders sort of insane! talked to - hs dropout at 14 made a deterministic linux distro for his security product - guy who got chess ...

    yc founders sort of insane! talked to - hs dropout at 14 made a deterministic linux distro for his security product - guy who got chess NM at 12yo (we played and i did ok) - 2x yc whos still technically in school def the best part of yc

  4. X

    When building an agent, it always bothered me that I could not evaluate exactly what actions it could take before dropping it into production. At Scale AI, we've always pushed the notion that evals are intuitively the best way to see how an LLM performs. When coupled with a Show more Quote Archal @archal_labs · May 26 Today we're excited to introduce Archal publicly, the first deterministic eval platform for AI agents. Software testing exists because we figured out that catching bugs before users do is cheaper than catching them after. Somewhere in the last two years that lesson got lost. 0:01 / 1:11

    When building an agent, it always bothered me that I could not evaluate exactly what actions it could take before dropping it into production. At Scale AI, we've always pushed the notion that evals are intuitively the best way to see how an LLM performs. When coupled with a...

  5. X

    Wow I think I had preview access to this (@AidanTiruvan ) without even knowing!

    Wow I think I had preview access to this (@AidanTiruvan ) without even knowing!

  6. YouTube

    Archal (YC S26) Demo

    Archal (YC S26) Demo Archal (YC S26) Demo. archal.ai

  7. X

    that relatable moment when your cofounder goes to jail for being a bad driver

    that relatable moment when your cofounder goes to jail for being a bad driver

  8. X

    my gluttony sickens me

    my gluttony sickens me