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

Agent37, a YC F26 company, offers low-cost sandboxes for running AI agents, significantly reducing expenses compared to other providers. Their customers pay an average of $0.37 per month per sandbox. Thanks to optimizations, Agent37 now provides a free plan, with over 90% of new sign-ups utilizing it to host personal AI agents like Hermes, Openclaw, or Claude Code. The infrastructure cost for these free sandboxes ranges from $0.05 to $0.10 per user monthly.