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

Agent37, a Y Combinator F26 startup, offers AI agent sandboxes at under 10% of typical competitor costs, averaging $0.37/month per sandbox with free tier options available. The company achieves these low costs through techniques including efficient CPU/RAM management tailored to agent workload patterns, using lower-cost infrastructure providers like Hetzner and OVH instead of hyperscalers, implementing gVisor containerization for resource sharing, and optimizing server configurations for RAM capacity. The platform supports various AI agent frameworks and has attracted over 90% of new signups as free plan users.