The best AI agent sandboxes in 2026

Verified 2026-07-26

1. 1
   Blaxel AI code-execution sandbox

   An idle-cost-optimized sandbox that resumes from hibernation in ~25ms with memory and processes intact, and charges $0 for compute on standby.

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2. 2
   Cloudflare Sandbox SDK AI code-execution sandbox

   Runs code on Cloudflare Containers + Durable Objects, blending V8 isolates (~50ms) with containers, bundled into the Workers Paid plan.

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3. 3
   Daytona AI code-execution sandbox

   An open-source, container-isolated sandbox for AI agents with ~90ms creation, persistent stateful workspaces, mid-execution snapshots and optional H100 GPUs.

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4. 4
   E2B AI code-execution sandbox

   A Firecracker-microVM sandbox that gives AI agents a secure, ~150ms-cold-start environment to run generated code, with pause/resume and filesystem snapshots.

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5. 5
   Northflank AI code-execution sandbox

   Runs sandboxes with selectable Kata/gVisor microVM isolation, unlimited session duration, any OCI image and BYOC deployment, at the lowest published vCPU rate in the category.

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6. 6
   Fly.io Machines AI code-execution sandbox

   Are fast-booting microVMs with a persistent ext4 filesystem, ~300ms checkpoints, zero idle cost and a native MCP endpoint.

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7. 7
   Vercel Sandbox AI code-execution sandbox

   A Firecracker-based, JavaScript/TypeScript-native sandbox that is persistent by default, billed on active CPU plus a per-creation fee.

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8. 8
   Runloop AI code-execution sandbox

   Provides enterprise "devbox" infrastructure for coding agents: SOC 2, 10K+ parallel instances, git-style disk snapshots with branching, and built-in SWE-bench evaluation.

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9. 9
   CodeSandbox SDK AI code-execution sandbox

   (now Together Code Sandbox) runs Firecracker microVMs with a git-versioned filesystem, ~500ms resume and sub-second forking, tuned for web-dev agents.

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10. 10
    Modal AI code-execution sandbox

    A Python-first serverless compute platform whose Sandboxes offer gVisor isolation, sub-second cold start and, uniquely, GPUs (T4 through B200) inside the sandbox.

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11. 11
    Beam AI code-execution sandbox

    A serverless sandbox and GPU platform with sub-second cold starts, per-second billing and no subscription floor, notable for offering GPUs inside the sandbox (H100 at $1.74/hr).

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12. 12
    Freestyle AI code-execution sandbox

    Gives AI agents hardware-virtualized Linux VMs with built-in Git, real persistent state and per-second billing at $0.04/vCPU-hr.

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13. 13
    Fly.io Sprites AI code-execution sandbox

    Are stateful sandbox environments on Firecracker microVMs, with a persistent ext4 filesystem and roughly 300ms checkpoint/restore, that pause to zero cost when idle.

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14. 14
    Together Code Interpreter AI code-execution sandbox

    A session-based API that runs LLM-generated Python in an isolated sandbox, billed at a flat $0.03 per 60-minute session.

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15. 15
    Deno Sandbox AI code-execution sandbox

    A V8-isolate sandbox, part of Deno Deploy, for running untrusted or LLM-generated JavaScript and TypeScript, billed on CPU time rather than wall-clock.

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16. 16
    Blacksmith Sandboxes AI code-execution sandbox

    (beta) are full VMs for coding agents that mirror a CI environment: they run Docker, system packages and services, boot from managed environment snapshots, and target the fastest single-core CPU for build- and test-heavy agent work.

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17. 17
    AWS Fargate AI code-execution sandbox

    Serverless container compute for ECS and EKS that runs each task in a Firecracker microVM, a general-purpose primitive teams use to isolate untrusted or agent-generated code, priced at $0.04048 per vCPU-hour and $0.004445 per GB-hour (Linux/x86, US East).

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