Sandbox.
/ Where agents run code.
Compute sandboxes for AI agents — microVMs, containers, and snapshot architectures that let agents run code, browse the web, and persist state without crashing each other or the host.
●46 vendors·Last update 2026-05-18
Who builds them.
One card per sandbox vendor. Stage, funding, customer logos, and key differentiators — the company-level view that complements the per-product spec sheet.
BL
ReadyCategory leaderFirecrackerSOC 2 · HIPAAOSS16 regions
Total funding
$7.3M
Seed · Jul 2025
Cold start
<25ms
Standby resume
Founded
2024 (core team from ForePaaS / OVHcloud)
Team size
6 co-founders + team
Funding
$7.3M Seed (July 2025) led by First Round Capital, with Y Combinator, Liquid 2, Multimodal
Founders
Paul Sinaï (CEO) — previously CEO of ForePaaS (acquired by OVHcloud); 5 co-founders all from OVH/ForePaaS
Customers
Human Behavior · Vybe · Jazzberry
Isolation
Firecracker microVM · EROFS + tmpfs overlay
Cold start
Sub-25 ms resume from standby
Snapshots
save+restore+fork — full filesystem and memory; fork from templates
Storage
Both — volumes + snapshot-based standby
Compliance
SOC 2 Type II · HIPAA BAA · ISO 27001
GitHub
Partial OSS (SDK/CLI)
Last release
Active development as of April 2026
Edge
Industry-fastest resume at 25 ms; perpetual standby with zero compute cost; 16 global regions
Blaxel's architecture uses EROFS (read-only base filesystem) + tmpfs (RAM-based writable layer) + OverlayFS orchestration, reserving ~50% of available memory for tmpfs. This enables the 25 ms resume benchmark — the fastest in the industry. Standby transitions complete in ~15 seconds, and the system can sustain unlimited standby duration.
Founders
Vasek Mlejnsky (CEO), Tomas Valenta (CTO)
Isolation
Firecracker microVMs
Edge
Most popular open-source sandbox SDK for AI agents.
Founders
Erik Bernhardsson (CEO), formerly Spotify ML; Akshat Bubna (Co-Founder)
Isolation
gVisor + container runtimes
GPU
Yes — A100, H100, L4, T4 on demand
Edge
GPU-first serverless compute with Pythonic API.
Founders
Ivan Burazin (CEO, previously Codeanywhere)
Isolation
Container-based dev environments
Storage
Persistent dev workspaces
Edge
Dev environment platform with managed + self-hosted options.
Team size
Publicly traded (NYSE: NET); thousands of employees
Founders
Matthew Prince (CEO), Michelle Zatlyn (President), Lee Holloway
Isolation
V8 isolates + Cloudflare Containers (microVMs)
Cold start
~5 ms (Workers cold start)
Storage
Durable Objects + R2 + KV
Compliance
SOC 2, HIPAA, GDPR, ISO 27001, FedRAMP
Edge
Edge sandbox spanning 320+ data centers; global reach by default.
Founders
Ives van Hoorne, Bas Buursma
Isolation
Firecracker-based microVMs
Edge
Mature browser-IDE platform pivoting to programmatic sandbox SDK.
Founders
Guillermo Rauch (CEO) — creator of Next.js, Socket.IO, Mongoose
Isolation
Firecracker microVMs
Edge
Sandbox primitive baked into Vercel's deployment platform.
Founders
Kurt Mackey (CEO)
Isolation
Firecracker microVMs
GPU
Yes — GPU regions available
Storage
Volumes + LiteFS/Tigris
Edge
Per-second microVM billing with 35+ global regions.
Founders
Paul Klein IV (CEO)
Isolation
Headless Chromium sandboxes
Snapshots
Browser session checkpoint
Storage
Session persistence + recordings
Edge
Headless browser sandboxes purpose-built for agent web tasks.
Founders
Will Stewart (CEO), Olu Niyi-Awosusi
Isolation
Kubernetes-managed containers
Storage
Persistent volumes + managed databases
Compliance
SOC 2, HIPAA, GDPR
Edge
Managed K8s + BYOC sandboxes for production-grade workloads.
