Launch HN: Agent37 (YC F26) – Low-cost agent sandboxes for running agents

YC startup Agent37 launched cheap gVisor sandboxes for AI agents, averaging $0.37 per sandbox each month.

Agent37, a Y Combinator F26 startup, launched sandboxes for running AI agents and says costs are under 10% of most sandbox providers, with customers averaging $0.37 per sandbox per month. Free-plan infrastructure averages about $0.05 to $0.10 per user monthly, and more than 90% of new signups use the free plan. The company uses gVisor on hosts from Hetzner and OVH, sharing host memory for faster boots, but those sandboxes do not support Docker-in-Docker or Android emulators. Full VM sandboxes are offered at a higher price for workloads that need them.