Vercel Sandbox now supports FUSE-based filesystems
Vercel just unlocked direct S3 streaming in Sandbox. No more data copies. Remote storage mounts now native.
Why it matters
Vercel's FUSE filesystem support removes a key operational bottleneck for AI/ML workloads—teams can now stream large datasets and state across distributed Sandboxes without copying, reducing latency and infrastructure costs for model training pipelines and inference workflows.
The key facts
11 to knowVercel Sandbox now supports FUSE-based filesystems
Enables mounting of S3 buckets, network filesystems, and custom FUSE drivers
Allows streaming large datasets directly from object storage without copying data
Supports shared state across multiple Sandboxes via common filesystem
POSIX-compatible tools can now run against remote sources directly
Published July 3, 2026
Enables direct mounting of S3 buckets and remote storage
Eliminates need to copy data into Sandbox first
Supports streaming large datasets directly from object storage
Allows state sharing across Sandboxes through common filesystem
Works with any FUSE-compatible driver as POSIX paths
Go to the source
Vercel Blogvercel.com
Publisher excerpt: now supports FUSE, letting you mount remote storage and custom filesystems inside a running Sandbox. Use it to attach S3 buckets, network filesystems, or any other FUSE-compatible driver as a regular path.Vercel Sandbox This makes it possible to stream large datasets directly from object storage,…