Propolis

Acquired · Hands off QA via intelligent browser agents.

Why it ranks

11signal of 100 · rising 7

A sum of public facts, not a judgement and not investment advice.

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SmoothShared: browser agentYC F24ActiveAI	AI	Active	YCF24
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Kura AIShared: browser agentYC S24ActiveAI	AI	Active	YCS24
PomeradoShared: browser agentYC F26ActiveAI, Devtools	AI, Devtools	Active	YCF26

Companies next to Propolis
Company	Category	Status	Program
Synthetic SocietyShared: simulate real, real userYC S25ActiveOther	Other	Active	YCS25
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VibeFlowShared: hand offYC S25ActiveAI	AI	Active	YCS25
OnfolkShared: hand offYC S21AcquiredOther	Other	Acquired	YCS21
MachinationsShared: browser, simulateSeedcamp 2019Not statedOther	Other	Not stated	Seedcamp2019

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Propolis simulates real users via swarms of autonomous browser agents that test for you.

Which YC batch was Propolis in?

Propolis was in Y Combinator's Spring 2025 batch (X25).

Is Propolis still active?

Y Combinator lists Propolis as acquired.

Who founded Propolis?

Propolis's founders, as listed on its YC page: Marc Papazian (Founder/CEO), Matt White (Founder/CTO).

Where is Propolis based?

Propolis lists New York City, NY, USA as its location on YC's directory.