Open-source Firecracker microVMs
240 ms cold starts for AI agent sandboxes
PandaStack is the open-source alternative to E2B. Spawn isolated Firecracker microVMs from your agent, fork them in milliseconds, snapshot them in seconds. Run on your own VPC, your own hardware, or in the cloud.
# 30 seconds to your first sandbox
$ pip install pandastack
$ export PANDASTACK_API_KEY=dam_...
$ python -c "
from pandastack import Sandbox
sb = Sandbox(template='code-interpreter')
print(sb.run('print(2 + 2)').stdout)
sb.close()
"
4Built for agents that need to do real work
Sub-300 ms cold starts
Snapshot-restore + XFS reflink rootfs CoW. No 'just start a Docker container' nonsense — these are real KVM VMs.
Fork mid-execution
Pause a running VM, fork it 10× from the same memory state. Parallel sandbox exploration in <50 ms each.
11 bake-ready templates
code-interpreter, python-data, node-js, browser, rust, go, ruby, java, deno, bun, blank — all snapshotted at boot.
Python · TypeScript · CLI
First-class SDKs. SSE streaming for exec output. PTY over WebSocket. LSP-as-a-service inside the VM.