Best E2B alternatives
The strongest E2B alternatives are Daytona, Modal Sandboxes, Vercel Sandbox. Pick based on what you need that E2B does not offer — see the reasons under each entry.
Why teams look beyond E2B
The safe default for most agent builders: mature, open source, microVM-isolated and widely supported.
- CPU-only — no GPUs
- Session length capped at 1 hour on the free plan and 24 hours on Pro
- SDKs limited to Python and JavaScript/TypeScript
- Pro plan carries a $150/month platform fee
E2B alternatives, ranked
Daytona
Stateful sandboxes for AI-generated code — Linux containers, Linux and Windows VMs, macOS and GPU sandboxes — with snapshots, volumes and preview URLs.
- Containers or VMs
- BYOC
- GPU
- Pause/resume
Why it’s here: Long-lived, stateful agent workspaces that need many SDK languages, GPUs, or Windows and macOS sandboxes. The strongest choice for stateful coding-agent workspaces and breadth of sandbox types; note the shift away from open source.
Modal Sandboxes
Sandboxes on Modal’s serverless compute platform for running untrusted code at very high scale, with GPUs, snapshots and tunnels.
- gVisor or VM
- GPU
- Pause/resume
Why it’s here: High-concurrency and GPU-backed sandboxes — RL rollouts, evals and coding agents at scale. The best fit when scale or GPUs matter most, especially for teams already on Modal.
Vercel Sandbox
Firecracker microVM sandboxes on Vercel’s infrastructure, persistent by default and billed on active CPU, with fine-grained egress control.
- Firecracker microVM
- Pause/resume
Why it’s here: Teams on Vercel and agent builders who want microVM isolation, active-CPU billing and credential brokering. A polished microVM sandbox with standout egress and billing design; the obvious pick for Vercel-centric teams.
Fly.io Sprites
Persistent, hardware-isolated Linux computers for AI agents with a durable 100 GB disk, checkpoints, and no compute charges while idle.
- MicroVM
- Pause/resume
Why it’s here: Long-running, stateful agent computers that should cost nothing while idle. The most natural “persistent computer per agent” model, with idle-free billing.
Cloudflare Sandbox SDK
A TypeScript SDK for Cloudflare Workers that runs untrusted code in Linux sandboxes backed by Cloudflare Containers and Durable Objects.
- MicroVM (Containers)
- Open source
- Snapshots
Why it’s here: Teams building on Cloudflare Workers that want per-user sandboxes with egress and credentials controlled in code. A strong, programmable option for Workers developers; less suited to Python-first agent stacks.
Blaxel
Perpetual microVM sandboxes for AI agents that drop to standby when idle and resume with memory intact, plus volumes, batch jobs and MCP hosting.
- MicroVM
- BYOC
- Pause/resume
Why it’s here: Always-available agents that sit idle most of the time and need near-instant resume. A strong design for always-on, mostly-idle agents; watch how the Baseten acquisition shapes the roadmap.
Microsandbox
Open-source, local-first microVM runtime that gives each sandbox its own Linux kernel, with an optional managed cloud.
- MicroVM (libkrun)
- Open source
- Self-hostable
- BYOC
- Snapshots
Why it’s here: Self-hosted microVM isolation on developer machines or your own servers. The most approachable way to get microVM-grade isolation locally or self-hosted.
E2B vs alternatives
| Sandbox | Isolation | Open source | Self-host / BYOC | Cold start (vendor) | Max session | Snapshots / pause | GPU | SDKs |
|---|---|---|---|---|---|---|---|---|
| E2B | Firecracker microVM | Yes | Yes / Yes | Not documented | 1 h / 24 h (Pro) | Yes / Yes | No | Python, JavaScript/TypeScript |
| Daytona | Containers or VMs | No | Not documented / Yes | <90 ms | Unlimited | Yes / Yes | Yes | Python, TypeScript, Ruby, Go, Java |
| Modal Sandboxes | gVisor or VM | No | No / Not documented | <1 s | Up to 24 h | Yes / Yes | Yes | Python, JavaScript/TypeScript, Go |
| Vercel Sandbox | Firecracker microVM | No | No / No | Milliseconds (claim) | 24 h (Pro) | Yes / Yes | Not documented | JavaScript/TypeScript, Python |
| Fly.io Sprites | MicroVM | No | No / No | 0.1–2 s wake | Unlimited | Yes / Yes | No | JavaScript/TypeScript, Go, Python, Elixir |
| Cloudflare Sandbox SDK | MicroVM (Containers) | Yes | No / No | 1–3 s | No fixed cap | Yes / Not documented | Not documented | TypeScript (Workers) |
| Blaxel | MicroVM | No | No / Yes | <25 ms resume | Unlimited (standby) | Yes / Yes | Not documented | TypeScript, Python, Go |
| Microsandbox | MicroVM (libkrun) | Yes | Yes / Yes | <100 ms | Not documented | Yes / Not documented | No | TypeScript, Python, Rust, Go, Ruby, CLI, MCP server |
Frequently asked questions
What is the best alternative to E2B?
Is there an open-source alternative to E2B?
Cite this page
Agent Sandboxes. (2026). Best E2B alternatives. agentsandboxes.org. Last reviewed November 8, 2026. https://agentsandboxes.org/alternatives/e2b/
Found an error or a missing sandbox? Submit a correction — every entry links to the sources it relies on.