Deno Sandbox alternatives
Neutral ranking · no paid placement · verified 2026-08-09
Looking for a Deno Sandbox alternative usually means one specific thing changed in your requirements. Start from what you need to move on (a lower rate, a faster start, GPU access, or stronger isolation), then pick from the list below. For reference, Deno Sandbox itself is best for running untrusted JS/TS or LLM-generated code inside a Deno Deploy app, billed only for CPU time used.
| Alternative | Isolation | Cold start | $/vCPU-hr | Why consider it |
|---|---|---|---|---|
| Blaxel | microVM | 25ms | $0.083 | native MCP support. |
| Cloudflare Sandbox SDK | V8 isolate + container | 50ms | $0.072 | native MCP support. |
| Daytona | Docker container | 90ms | $0.05 | adds GPU access, native MCP support. |
| E2B | Firecracker microVM | 150ms | $0.05 | Teams that want the cleanest SDK and strong microVM isolation for agent code execution. |
| Northflank | Kata / gVisor microVM (selectable) | 300ms | $0.01667 | cheaper per vCPU-hr ($0.01667 vs $0.05), adds GPU access. |
| Fly.io Machines | microVM | 300ms | $0.07 | adds GPU access, native MCP support. |
| Vercel Sandbox | Firecracker microVM | 400ms | $0.128 | Teams already on Vercel building JS/TS AI apps. |
| Runloop | microVM | 400ms | $0.108 | native MCP support. |
| CodeSandbox SDK | Firecracker microVM | 500ms | $0.05 | Web-development agents that fork and branch environments frequently. |
| Modal | gVisor | 800ms | $0.14 | adds GPU access. |
| Beam | Container | n/a | n/a | adds GPU access. |
| Freestyle | Hardware-virtualized VM | n/a | $0.04 | cheaper per vCPU-hr ($0.04 vs $0.05). |
| Fly.io Sprites | Firecracker microVM | n/a | $0.07 | Agents and dev workflows that need a persistent, resumable Linux environment with fast checkpoints. |
| Together Code Interpreter | Managed isolated sandbox | n/a | n/a | RL pipelines and agents that need cheap, high-concurrency Python execution priced per session. |
| Blacksmith Sandboxes | Full VM | n/a | n/a | Coding agents bottlenecked by build/test speed that need full, CI-identical VMs with Docker. |
| AWS Fargate | Firecracker microVM | n/a | $0.04048 | cheaper per vCPU-hr ($0.04048 vs $0.05). |
Head-to-head with Deno Sandbox
FAQ
What is the best alternative to Deno Sandbox?
The closest alternatives to Deno Sandbox are Blaxel, Cloudflare Sandbox SDK, Daytona. The right pick depends on your priority: cold start, isolation model, price and GPU/MCP support. All 16 tracked alternatives are compared below with dated specs.
Why switch from Deno Sandbox?
Deno Sandbox is best for running untrusted JS/TS or LLM-generated code inside a Deno Deploy app, billed only for CPU time used. Teams look at alternatives when their priorities differ: a cheaper vCPU-hour rate, a faster start, GPU access, or a different isolation model.
Weighing Deno Sandbox against the alternatives?
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