Agent 37
Hosted Linux computers for agents, sold two ways: a prepaid Cloud API and a one-click personal-agent subscription.
6 recorded caveats.
Providers
The twelve providers
These pages are secondary: the feature pages carry the comparison. Use these for the detail behind a verdict — sizes, the meter, how far a non-technical user gets, and every contradiction the research found.
Blaxel
MicroVM sandboxes billed by allocated RAM, now part of Baseten.
5 recorded caveats.
Boat
Ubuntu VMs in the EU, billed per second, with seven coding agents preinstalled and no pause at all.
5 recorded caveats.
boxd
KVM machines in the EU that boot in milliseconds, snapshot with memory, fork live, and hibernate when idle.
8 recorded caveats.
E2B
Firecracker microVMs and templates for agent code, sold per running second.
5 recorded caveats.
InstaBox
Firecracker machines with a browser desktop, sold as a subscription that is also a monthly credit.
6 recorded caveats.
Lizard
Firecracker sandboxes at a flat hourly price per size, plus an app platform for whatever the agent builds.
6 recorded caveats.
Morph
Full VMs with memory-and-disk snapshots, branched into parallel copies, billed in MCUs.
5 recorded caveats.
Runtime
Firecracker microVMs billed on measured CPU, with the strongest secret handling in this set.
6 recorded caveats.
Sandboxer
Whole Ubuntu microVMs billed per second, sold through monthly plans whose dollars come back as machine time.
5 recorded caveats.
Sprites
Persistent Fly.io microVMs that suspend after about 30 seconds idle and bill measured CPU and memory.
5 recorded caveats.
Vercel Sandbox
Firecracker microVMs inside Vercel, billed on active CPU and provisioned memory.
5 recorded caveats.