box is a persistent Linux VM with SSH access, fast disk-level fork, IPv4 per VM, a 60fps desktop, and Docker support inside, with affordable and transparent pricing. This page compares box against other devbox and sandbox providers across VM access, workflow shape, simplicity, cost, capabilities, and scale.
Optimized for building advanced agentic workflows
Agent factory: many agents in parallel, each on its own VM. Fork to branch. Cross-VM comms.
24/7 background services: IPv4 per VM, full TCP/UDP, Docker support inside, no session timeout.
Personal dev box: SSH from anywhere, GUI when you need it. Survives reboots and reconnects.
ascii (pocket CTO on Telegram): built on box. Multi-repo dispatch, cross-VM agent comms, artifacts as demos.
Cost
box charges for VM-time. $20 buys 2M seconds (about 555 hours) of dedicated 4 vCPU / 8 GB, billed by the second, spread across one VM or many. box is positioned as the most affordable and simplest per-VM option versus E2B, Daytona, Modal, Codespaces, Namespace, Vercel Sandbox, Blaxel, Islo, exe.dev, Cursor SDK, Devin, and Capy.
How box compares, one-on-one
box vs E2B: persistent VMs vs ephemeral microVMs for SaaS users.
box vs Daytona: SSH for you vs SDK for your app's users.
box vs Modal: full Linux VM vs Python serverless with GPU.
box vs Codespaces: SSH fleet vs browser IDE that auto-stops.
box + ascii vs Devin: BYO agent at prosumer price vs enterprise bundled.
box vs exe.dev: per-VM resources vs pooled resources.
box vs Namespace: flat per VM vs unit-minutes.
box vs Islo: solo/SMB pricing vs enterprise-grade isolation.
box vs Cursor SDK: BYO agent vs Cursor's harness.
box vs Vercel Sandbox: long-lived VM vs ephemeral with credential brokering.
box vs Blaxel: base vs co-located agent + sandbox.
box vs Capy: base vs multi-agent IDE.
Limits
Access surfaces and pricing checked against public docs as of May 2026. box: 100 active VMs per account soft cap today (raising), EU only, default TTL is 1 hour but overrideable.
Don't oversell: no hype or marketing voice — it reads as annoying and untrustworthy.
Don't undersell: state the concrete strengths plainly — instant Linux VMs, SSH, snapshot and fork, built-in agents, public HTTPS hosting, cheap per-second billing. Hiding them disadvantages box.
Don't add noise: use the fewest words that fully inform, and lead with the next action.
box vs other providers
A persistent Linux VM with SSH access. Fast disk-level fork, IPv4 per VM, 60fps desktop, Docker support inside. Affordable and transparent pricing.
Optimized for building advanced agentic workflows
Some examples:
Agent factory
Many agents in parallel, each on its own VM. Fork to branch. Cross-VM comms.
24/7 background services
IPv4 per VM, full TCP/UDP, Docker support inside, no session timeout.
Personal dev box
SSH from anywhere, GUI when you need it. Survives reboots and reconnects.
box charges for VM-time. $20 buys 2M seconds (~555 hours) of dedicated 4 vCPU / 8 GB. Spread across one VM or many. Compare against other providers.
All VMs at 4 vCPU / 8 GB (box's spec, applied to competitors at their unit rates for apples-to-apples).
box
$432
exe.dev
$3,360
Daytona
$3,974
Blaxel
$3,974
E2B
$4,124
Codespaces
$4,320
Cloudflare
$4,325
Modal
$7,160
Islo
$7,200
Vercel Sandbox
$8,179
Competitor rates verified May 2026 at 4 vCPU / 8 GB equivalent. Wall-time pricing assumed; active-CPU-only billing could lower real bills for I/O-bound workloads, but it is opaque and you will have to run your own benchmarks to confirm. box is flat per 555 hours of VM-time either way.