box vs other devbox/sandbox 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 powerful 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.

ascii: pocket CTO on Telegram

Built on box. Multi-repo dispatch, cross-VM agent comms, artifacts as demos.

Cost simulator

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
$26flat VM-time block
exe.dev
$202Cloud Pool rate
Daytona
$238
Blaxel
$238M-tier flat
Codespaces
$259auto-stops on idle
Cloudflare
$264active CPU only
E2B
$388
Modal
$430
Islo
$432
Vercel Sandbox
$491active CPU only

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.

The landscape

01

Workflow shape x Affordability

Left = platform bakes in the workflow (give it a ticket, get a PR).

Right = platform gives you the base, you build the workflow.

workflow baked in to build your own workflowexpensive per VM to more affordableasciiboxexe.devName-spaceDaytonaE2BModalVercelIsloCodespcCursor SDKCapyDevin
BYA bring your agentBYT bring your tokensCLI/API programmable

Capabilities

BYO repos + arbitrary setup script

boxasciiexe.devNamespaceDaytonaIslo

SSH access

boxexe.devNamespaceDaytonaCodespacesCursor SDKIslo

Docker inside the VM

boxasciiexe.devNamespaceDaytonaCodespacesIslo

No session cap / runs 24/7

boxasciiexe.devNamespaceDaytonaBlaxelIslo

Fast disk snapshots / branching

boxasciiDaytonaVercel SandboxE2BModal

Dedicated IPv4 per VM

boxasciiIslo

Full TCP/UDP + BYO domain

boxasciiIslo

Flat pricing

boxasciiexe.devCodespaces

Agent harness pre-installed

boxascii

Process fork (memory + running processes)

ModalE2B

1000+ concurrent VMs ergonomically

DaytonaE2BModalVercel SandboxBlaxel

<500ms time to VM-ready

DaytonaE2BBlaxel

Which one's for you

Three questions, ~15 seconds.

Scale of use

Compare individually

Deeper breakdowns.

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

work in progress

In the meantime, ping us and ask directly.