Perpetual sandboxes for autonomous agents.

A sandbox shouldn't expire while your agent is still thinking. Blaxel gives every agent a persistent microVM runtime that boots in milliseconds, suspends to zero when idle, and resumes in about 25 milliseconds with full memory and filesystem intact. Close the lid, open it months later, and pick up exactly where you left off.

Read the sandbox quickstart Try Sandboxes for free
An isolated sandbox crate holding files, processes and an agent

[HOW IT WORKS]

Traditional sandboxes lose state. Blaxel persists.

Traditional sandboxes provision from scratch on every run, stay alive for an hour at most, then lose their state forever. Blaxel inverts that. A Blaxel sandbox runs for any duration, drops to standby at $0 compute when idle, and restores in about 25 milliseconds on the next call - with process state, memory, and filesystem unchanged.

  • 1

    Boot in milliseconds

    Instantly provisions a fresh isolated microVM environment.

  • 2

    Suspend to zero when idle

    Automatically snapshots CPU & RAM state after 15 seconds.

  • 3

    Resume in ~25ms with state intact

    Restores execution instantly on next API or tool call.

[THE FASTEST SANDBOX IN THE WORLD]

Speed & persistence

Flagship 25ms resumes give your agents absolute autonomy and context persistence at instant speeds.

  • World-class 25ms resume times

    Resume from standby in about 25 milliseconds with memory state restored. Industry-leading cold-starts let agents run AI code instantly.

  • Fully stateful machines

    Persist sandboxes forever across sessions and resume them near-instantly, even after months. Full filesystem and memory snapshots mean you never have to restart processes on resume.

  • Auto-suspended when idle

    Sandboxes scale to zero after 15 seconds of inactivity, so you never pay for compute you don't use - with no 24-hour timeout, no 7-day rebuild, and no cold-start tax.

  • RAM-speed filesystem

    The root filesystem runs in memory, keeping reads and writes at RAM speed for almost every operation.

  • Automated cleanup

    Set lifecycle policies to automatically delete sandboxes that will never be reused.

“Other providers take minutes to spin up a sandbox. Blaxel takes milliseconds.”
Dirk Breeuwer Co-founder, Corvera

[GIVE A COMPUTER TO YOUR AGENT]

Agent-native environment

Blaxel Sandboxes are AI-native: a high-performance OS-as-a-service that gives every agent full Linux access to filesystems, libraries, shells, and logs.

[STORAGE]

Persist context and AI-generated code for years

Complement your agent runtimes with storage built to retain context and AI-generated data for the long term.

  • Guaranteed retention for years

    Block-storage-based volumes retain data for years with a fully redundant solution.

  • Fork from a snapshot every time

    Create new volumes from volume templates to prepopulate them with data you reuse on every run.

  • Share context across workloads

    Reuse the context persisted in one sandbox across other workloads.

Own your networking layer

Shape egress, inject secrets, pin IPs, and route model calls from the same private agent backbone.

Learn more about our networking features

  • Custom domains

    Expose services running in a sandbox on your own domains, with managed TLS.

  • Proxy

    Inject secrets into HTTPS traffic with a managed egress proxy, so credentials never live in the sandbox.

  • Fixed egress identity

    Dedicated static IPs so downstream systems can allow-list your sandbox traffic.

  • Interconnect with your own cloud

    Private endpoints into your VPC, so data never transits the public internet.

[BUILT FOR SCALE AND SECURITY]

Isolation, compliance & scale

Hardened security and elastic infrastructure for your most demanding AI workloads with total control.

  • Hardware-level isolation

    Every sandbox is an individual microVM built on Firecracker. Kernel-level isolation means an LLM can't be prompted into escaping its sandbox, and one tenant can never reach another.

  • Enterprise compliance

    Security-first architecture certified to the standards enterprises require: SOC 2, HIPAA, ISO 27001. Visit the compliance portal.

  • Zero data retention

    Each sandbox runs in its own microVM with the root filesystem in memory, so all data is wiped forever when the sandbox is destroyed.

  • Region support

    Choose deployment regions for local data residency, with Europe and US regions available.

  • Scale to 50,000+

    Scale to 50,000+ concurrent sandboxes and up to 512 TB of volume storage with a tier-based quota system.

[BUILT FOR AI USE CASES]

AI builders run sandboxes to power their products from agentic code execution to data wrangling.

  • AI code review

    Review agents analyze repositories in fully isolated, per-tenant environments, kept snapshotted in standby between sessions so there's no need to re-clone.

  • Coding agents and app builders

    Materialize a runnable app the moment a user prompts, keep it warm on standby, and resume it in 25ms when they come back.

  • Data wrangling

    Run untrusted, AI-generated transformations against real data with RAM-speed filesystems and hard isolation per job.

  • Computer use and browsing

    Give agents a full Linux desktop and browser per session, with outbound control on everything they reach.

Achieve near-instant latency today.

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