Agents work, wait, then work again. Blaxel puts their full working environment on standby between actions, then resumes it in 25ms. Files, memory, and processes stay intact. Active-compute cost drops to $0 while on standby.
Up to $200 in credits · No credit card required
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Blaxel vs. Vercel Sandbox
Vercel Sandbox runs code inside Vercel projects. Blaxel keeps the agent's live working state ready without charging for active compute during the wait.
Best fit
Blaxel
Agents that do real work
Agents that execute code, pause for input, and return to the same working environment.
Vercel Sandbox
App-native sandbox execution
Code execution that belongs inside a Vercel project and fits a session-based sandbox.
While the agent waits
Blaxel
Keep the state without active compute
The sandbox enters standby automatically. Active-compute cost drops to $0 while the full working state stays ready. Snapshot storage still applies.
Vercel Sandbox
Persist files, restart the runtime
Save the filesystem and restore it into a new sandbox session. Memory and running processes start over with the session.
Access and credentials
Blaxel
Set controls on the sandbox
Control sandbox access with workspace permissions and short-lived client sessions. Domain filtering and proxy secret injection are available.
Vercel Sandbox
Route control through the Vercel project
Set egress rules, broker credentials outside the VM, and proxy selected requests through the Vercel project.
Runtime visibility
Blaxel
Inspect the live working environment
Stream output, process activity, and filesystem events while the agent works.
Vercel Sandbox
Logs and platform metrics
Stream logs and monitor sandbox metrics in Vercel.
Where it runs
Blaxel
Independent of the app platform
Run the agent on Blaxel and call it from any application through an SDK or REST API.
Vercel Sandbox
Inside the Vercel project
Run the sandbox as a Vercel project primitive alongside the application.
Run the pause test. Keep the Vercel app.
Up to $200 in credits · No credit card required
Agents work, wait, then work again
Blaxel snapshots the full sandbox into standby. You pay for snapshot storage, not active compute, while it waits. The same files, memory, and processes resume in 25ms.
$0 active compute on standby
When the agent waits for a person, CI run, or external system, active-compute billing stops. Snapshot storage keeps the working state ready for the next action.
25ms resume with full state
Resume the same filesystem, memory, and processes in 25ms. The next action starts with dependencies loaded and the working environment intact.
Credentials and network access
Use workspace permissions and short-lived sessions to control who can operate a sandbox. Add domain filters or proxy secret injection.
Live runtime visibility
Stream output, watch process and filesystem activity, and open a controlled preview before the agent finishes or enters standby.
Keep Vercel and the agent framework
Keep the agent logic and model provider you already use. Host the agent, sandbox, MCP servers, batch jobs, and model access on Blaxel while the application stays on Vercel.
First-class sandbox provider
Keep OpenAI agent logic while Blaxel provides persistent code execution, file transfer, streaming, and application previews.
Agent framework compatibility
Run Claude Agent SDK or Claude Code with an isolated computer that preserves the working environment between interactions.
Run the pause test with OpenAI or Claude.
Up to $200 in credits · No credit card required
Blaxel vs. Vercel Sandbox
Blaxel is the better fit for agents that work in bursts and must resume the same filesystem, memory, and running processes. Vercel Sandbox is the better fit when execution belongs inside a Vercel project and should share its authentication, observability, and filesystem persistence.
Blaxel standby preserves the filesystem, memory, and running processes, then resumes the same working state in 25ms. Vercel persistence snapshots the filesystem and installed packages, then starts a new VM session from that state, so memory and processes must be recreated.
Blaxel stops active-compute billing while a sandbox is in standby; snapshot storage and attached volumes still incur charges. Vercel bills Active CPU only while the CPU is used, but bills provisioned memory for the full running session, including time spent waiting. A stopped persistent sandbox uses snapshot storage.
Yes. Keep the frontend or API on Vercel and call Blaxel through an SDK or REST API. AI SDK agents can use the @blaxel/vercel package to connect to Blaxel-hosted models and MCP servers, and you can deploy agent logic with the Blaxel CLI.
Choose Vercel Sandbox when the workload is tightly coupled to a Vercel project and you want project authentication, observability, and filesystem persistence in the same control plane. Choose Blaxel when preserving the agent's live working state across pauses is the primary requirement.
Compare which state survives a pause, where credentials live, how outbound access is restricted, what operators can inspect, and whether the runtime must belong to the application platform. The right choice depends on whether the agent lifecycle or the Vercel project should own execution.
Vercel sessions run for up to 24 hours on Pro and Enterprise and up to 45 minutes on Hobby. Persistence carries filesystem state into later sessions. Blaxel moves inactive sandboxes to standby and resumes the preserved environment in 25ms; starter-tier expiration policies still apply.
Keep the Vercel app
Connect a Vercel app or AI SDK agent to Blaxel. Let it enter standby at $0 active-compute cost, then reconnect. In 25ms, verify that the same files, memory, and processes continue. Snapshot storage charges apply.
