Open-source Modal alternatives
7 open-source sandbox providers you can use instead of Modal. Celesto Cloud has the lowest hourly price, $0.030 for 2 vCPU and 4 GiB.
Updated
Modal, for reference
ModalServerless compute with sandboxes and GPUs.
IsolationgVisor
2 vCPU · 4 GiB$0.238 / hr
Free tier$30 / month
Max session24 hours
7 open-source alternatives to Modal
Sorted by hourly price for 2 vCPU · 4 GiB, low to high
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Celesto Cloud
Cloud computers for AI agents, each in a microVM.MicroVMLower vCPU priceSnapshot and resume keep processes intact$0.030per hour
Containarium Cloud
Hosted Linux boxes for AI agents, reached over SSH.ContainerLower vCPU priceFree tier$0.040per hour
Sandbox0
Long-running agent sandboxes with durable storage.Bills on memory onlyNo session limitgVisor$0.060per hour
BoxLite Cloud
Hosted microVM boxes for AI agents, with an SDK.MicroVMLower vCPU priceDisabled on Cloud$0.158per hour
microsandbox cloud
Hosted microVM sandboxes for AI agents and untrusted code.MicroVMLower vCPU priceDisk only, from stopped persistent sandboxes$0.165per hour
$0.166per hour
PandaStack Sandbox
Firecracker microVM sandboxes for AI agents.Bills active CPU onlyNo session limitFirecracker$0.173per hour
Side by side
Modal first, then the 7 alternatives
Provider
Isolation
vCPU / hr
GiB / hr
Free tier
Max session
GPU
- Isolation
- gVisor
- vCPU / hr
- $0.071
- Free tier
- $30 / month
- Isolation
- MicroVM
- vCPU / hr
- $0.015
- Free tier
- $5 credit
- Isolation
- Container
- vCPU / hr
- $0.020
- Free tier
- Free tier
- Isolation
- gVisor
- vCPU / hr
- Included
- Free tier
- Not listed
- Isolation
- MicroVM
- vCPU / hr
- $0.050
- Free tier
- $100 credit
- Isolation
- MicroVM
- vCPU / hr
- $0.050
- Free tier
- Free plan
- Isolation
- Firecracker
- vCPU / hr
- $0.050
- Free tier
- $100 credit
- Isolation
- Firecracker
- vCPU / hr
- $0.054
- Free tier
- $5.40 / month