Compare every kind of
sandbox, neutrally.
From AI-agent code runtimes to Salesforce orgs to regulatory test regimes: one word, three universes. We track the specs, pricing and cold-start numbers so you don't have to trust a vendor's own blog.
AI Agent & Code-Execution Sandboxes
Ephemeral, secure runtimes (microVMs and containers) that spin up in milliseconds so agents and apps can execute generated code safely. Compared on cold start, isolation, pricing, GPU, persistence and SDK support.
Browse AI → 15 trackedEnterprise, Cloud & API Sandboxes
Vendor-provided sandboxes for building against a platform without touching production: Salesforce and ServiceNow orgs, cloud learning accounts, and payment/fintech API test environments like Stripe, Plaid and Mastercard.
Browse Enterprise → 11 trackedRegulatory & Fintech Sandboxes
Programs run by regulators (and the platforms that support them) that let firms trial innovative financial products with real customers under a controlled, time-limited regime.
Browse Regulatory →AI sandboxes, sorted your way
- Blaxel microVM 25ms
- Cloudflare Sandbox SDK V8 isolate + container 50ms
- Daytona Docker container 90ms
- E2B Firecracker microVM 150ms
- Northflank Kata / gVisor microVM (selectable) 300ms
- Fly.io Machines microVM 300ms
- Vercel Sandbox Firecracker microVM 400ms
- Runloop microVM 400ms
- CodeSandbox SDK Firecracker microVM 500ms
- Modal gVisor 800ms
- Beam Container n/a
- Freestyle Hardware-virtualized VM n/a
- Fly.io Sprites Firecracker microVM n/a
- Together Code Interpreter Managed isolated sandbox n/a
- Deno Sandbox V8 isolate n/a
- Blacksmith Sandboxes Full VM n/a
- AWS Fargate Firecracker microVM n/a
Vendor-published figures as of each page's verified date. Start times mix cold boots, warm resumes and isolate starts.
The comparisons people actually run
AI-agent code sandboxes
The fastest-moving category: secure runtimes where agents execute generated code. Ranked and compared on the specs that decide the bill.
E2B
AI code-execution sandboxE2B is a Firecracker-microVM sandbox that gives AI agents a secure, ~150ms-cold-start environment to run generated code, with pause/resume and filesystem snapshots.
Daytona
AI code-execution sandboxDaytona is an open-source, container-isolated sandbox for AI agents with ~90ms creation, persistent stateful workspaces, mid-execution snapshots and optional H100 GPUs.
Modal
AI code-execution sandboxModal is a Python-first serverless compute platform whose Sandboxes offer gVisor isolation, sub-second cold start and, uniquely, GPUs (T4 through B200) inside the sandbox.
Vercel Sandbox
AI code-execution sandboxVercel Sandbox is a Firecracker-based, JavaScript/TypeScript-native sandbox that is persistent by default, billed on active CPU plus a per-creation fee.
Cloudflare Sandbox SDK
AI code-execution sandboxCloudflare Sandbox SDK runs code on Cloudflare Containers + Durable Objects, blending V8 isolates (~50ms) with containers, bundled into the Workers Paid plan.
Northflank
AI code-execution sandboxNorthflank 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.
From "which sandbox?" to a decision, in four steps
Pick your universe
AI-agent code runtimes, enterprise and API test environments, or regulatory programs. Three different problems.
Compare what moves the bill
Cold start, isolation, price per vCPU-hour, GPU and persistence, side by side, not a feature checklist.
See real, dated pricing
Every figure carries a primary source and a "last verified" date, so you trust the number, not an adjective.
Get the fit
The cost calculator models your workload and we flag the gotchas, so you commit with eyes open.
Hard numbers
Cold start, $/vCPU-hr, session caps, GPU: measured and dated, not marketing adjectives.
No vendor bias
Every top result today is a vendor ranking itself #1. We're the referee, not a player.
Always current
A fast category. Each data point carries a "last verified" date and a link to the primary source.
What moved in the sandbox world, every Friday.
Pricing changes, new entrants, benchmark refreshes and one sharp take from Eve Harper. Read by engineers choosing where their agents and apps run. No fluff. Read the archive.