Vercel Sandbox review

Vercel Sandbox ranks third for a clean design and fair billing. The docs state that each sandbox runs in a Firecracker microVM with its own filesystem and network, and that it is meant for agent output, user uploads and third-party scripts. Features include snapshots, persistent sandboxes, custom OCI images, a firewall, regional placement and a multi-agent mode that gives each agent its own Linux user and home directory. It can also run privileged processes such as Docker or FUSE drivers, which many sandboxes block. Billing counts active CPU at $0.128 per hour and provisioned memory at $0.0212 per GB hour, so idle waiting on a model costs little CPU. Hobby includes 5 active CPU hours, 5,000 creations and 45-minute sessions free each month; Pro lifts sessions to 24 hours and 10,000 concurrent sandboxes. There is no desktop or computer use product, and Hobby stops creating sandboxes once its allotment is used.

Who it is for

Teams already on Vercel who want sandboxes that bill only for active CPU and authenticate automatically from their projects.

Price

Hobby includes 5 active CPU hours a month; Pro and Enterprise pay $0.128 per active CPU hour plus $0.0212 per GB hour of memory.

Active CPU $0.128 per hour
Quoted from the vendor pricing page on November 9, 2026.

Key features

• Each sandbox runs in a Firecracker microVM with its own filesystem and network
• Snapshots and persistent sandboxes
• Custom OCI images from Vercel Container Registry
• Firewall controls for sandbox traffic
• Multi-agent isolation with a Linux user per agent

Strengths and weaknesses

• Strength: Hobby includes 5 active CPU hours and 5,000 sandbox creations a month
• Strength: Pro allows 24-hour sessions and 10,000 concurrent sandboxes
• Strength: Supports system-privileged processes such as Docker and FUSE
• Weakness: Hobby sessions are capped at 45 minutes and 10 concurrent sandboxes
• Weakness: Hobby sandbox creation pauses once the monthly allotment runs out
• Weakness: Data transfer is billed at $0.15 per GB on paid plans

Key facts

• Hobby allotment: 5 active CPU hours, 420 GB-hours memory, 5,000 creations a month
• Active CPU: $0.128 per hour in iad1
• Memory: $0.0212 per GB-hour
• Max session: 45 minutes on Hobby, 24 hours on Pro
• Concurrency: 10 on Hobby, 10,000 on Pro

Where it ranks

Vercel Sandbox is No. 3 in our Best AI Agent Sandboxes verdict.