YCW25· AI· DevtoolsButter
Embedded Sandboxes for Agents
ActiveChecked 18h ago
Founders
- Erik DuntemanFounder/CEO
Same space
Competitors
Closest in what they build, same category.
BoatF26The best cloud VMs for billions of agentsShared: sandboxe, vms, sandboxActive
ArchalS26API sandboxes, built for AI agentsShared: sandboxe, sandbox, agentActive
ArdentX26Database sandboxes for AgentsShared: sandboxe, agentActive
EmbedderS25The Enterprise AI Platform for Embedded SoftwareShared: embedded, agent, buildingActive
Adjacent
Overlapping tags, a different niche.
BeamW22AI-Native Cloud PlatformShared: sandboxe, agentActive
Arga LabsX26Real-world sandboxes to test and train AI agentsShared: sandboxe, sandbox, agentActive
LendflowW21Embedded lending infrastructure for software companiesShared: embedded, embedActive
PlaygentS25Sandboxes for AI agentsShared: sandboxe, sandbox, safeActive
BlaxelX25The infrastructure for autonomous agentsShared: sandboxe, infra, agentActive
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About Butter
Butter is building bVisor, an incredibly lightweight sandbox runtime for AI agents. It embeds directly into your local process, providing a safe bash environment without the overhead of VMs or remote infra.
San Francisco, CA, USA
Butter: questions
Which YC batch was Butter in?
Butter was in Y Combinator's Winter 2025 batch (W25).
Is Butter still active?
Y Combinator lists Butter as active.
Who founded Butter?
Butter's founders, as listed on its YC page: Erik Dunteman (Founder/CEO).
Where is Butter based?
Butter lists San Francisco, CA, USA as its location on YC's directory.
Not affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.