Agent37

Pay-by-the-minute cloud sandboxes for hosting your AI agents

Overview

Each sandbox is a full Linux machine with root access, a terminal, a browser and desktop the agent can drive, and persistent storage that survives between sessions. It runs Claude Code, Codex, OpenCode, Grok, Pi, Hermes, OpenClaw or your own Docker image, with 1,000+ app integrations through Composio and gVisor isolation underneath.

The pitch is price: no subscription, metered compute, memory and disk, and idle boxes sleep and only pay for storage. It is a Y Combinator F26 company that launched on Hacker News on 12 October and picked up 127 points and 91 comments.

Key Features

  • Isolated sandbox per agent, gVisor kernel isolation

  • Full Linux root, terminal, browser and desktop control

  • Works with Claude Code, Codex, OpenCode, Grok, Pi, Hermes, OpenClaw or custom Docker images

  • 1,000+ app integrations via Composio

  • Sleep/wake for idle sandboxes, automatic backups

  • Per-sandbox spend caps

Pricing

Starting price

$0.0011/vCPU-hour (usage-based, no flat tier)

Pay as you go, no subscription.

  • Compute: $0.0011 per vCPU-hour

  • Memory: $0.00096 per GB-hour

  • Disk: $0.00012 per GB-hour

  • New accounts get a $5 starter credit once a card is added

Example from the site: a 2 vCPU / 4GB sandbox costs about $0.37 a month when mostly idle. Idle sandboxes only pay for disk. Caveat: that figure is the low end. A box running agents continuously is billed for every vCPU-hour, so budget from your real usage and set a spend cap.

Pros

  • Genuinely cheap at idle: a 2 vCPU / 4GB box that is rarely used comes to about $0.37 a month

  • No subscription, no minimums; you pay for minutes used

  • Spend caps per sandbox

  • Bring-your-own agent or Docker image, not locked to one vendor

  • $5 starter credit for new accounts

Cons

  • Cheap at idle is not cheap at load. Per-vCPU-hour billing scales with real use, and an agent that runs all day costs far more than the headline figure

  • Founded this year; the launch is a day old and there are no independent long-term reviews

  • The '95% cheaper' claim is the vendor's own comparison

  • Card required to claim the starter credit

  • No affiliate programme listed

What Makes It Unique

Metered per-minute pricing with sleep/wake makes an always-available agent box nearly free when it is idle, where most agent hosts sell flat monthly plans.

Kay Score

7

/ 10

Tool Information

Pricing

$0.0011/vCPU-hour (usage-based, no flat tier)

Category

Automation & AI Agents

Platform

Web / iOS / Android

Last Updated

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