Virtual machines that boot in 70 milliseconds.
Any Linux distro today. macOS and Windows in closed beta.
70 ms
0 ms
< 100 ms
50–90 %
import asyncio from fastvm import FastVM async def main(): async with FastVM() as client: # launch, 70 ms p50 vm = await client.launch(machine="c1m2") out = await client.run(vm, "python3 --version") print(out.stdout) # => Python 3.13.5 asyncio.run(main())
Measured against the alternatives.
FastVM≈ 14× faster than Modal70 ms≈ 14× faster than Modal
E2B300 ms
Daytona300 ms
Modal1 000 ms
E2BModalDaytona
Boot70 ms300 ms1 000 ms300 ms
Snapshot0 ms, zero-downtimeInterrupts procsVM shutdownFilesystem only
StorageSub-linearLinearLinearLinear
Compute50–90% savedStandardStandardStandard
IsolationDedicated kernelDedicated kernelShared, gVisorDocker
What people build on FastVM.
Coding agents
Snapshot every step. Roll back instantly on red. Spin up ten parallel attempts at a test suite, let an agent pick the best result, merge it.
Sixty seconds.
1$ pip install fastvm
2$ export FASTVM_API_KEY=…
3$ python -m fastvm launch
→ vm-7c4d9a ready (72 ms)