Acquisition
Apr 2026Butter was acquired by Modal; Erik Dunteman and Raymond Tana joined Modal's Sandbox team.
SourceCompany research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Butter is a San Francisco-based AI infrastructure company that began as pig.dev and now focuses on deterministic LLM caching and local sandboxing for AI agents; it was acquired by Modal in April 2026.
Primary product
An OpenAI-compatible LLM proxy / response cache with template-aware caching and automatic template induction, plus the bVisor embedded sandbox runtime for AI agents.
Founded
2024
Headquarters
San Francisco, California, United States
Team size
20-30
Work style
Onsite
Industry
Software Development
Sub-industry
AI infrastructure / agent tooling
Offices
Open Positions
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