Best sandboxes for AI agents in 2026

Updated November 4, 2026.

An AI agent that only chats can't do much. To clean up an inbox, research a list of companies or fix a bug, it needs a computer: a browser it can sign in with, files it can keep, and a terminal to run things in. A sandbox is that computer, kept apart from yours so a mistake stays contained.

Rakazo is an open source app for AI teammates that do real work. You talk to each bot in chat, and each one gets its own computer. You can watch its screen and take over at any moment. Where that computer runs is your choice: a hosted sandbox, a container on your own server, a Kubernetes cluster, or your own Mac or PC. This page compares every option Rakazo supports, with prices as of November 2026, and the popular sandboxes it doesn't support, so you can see where they fit.

Inbox ManagerComputer on any sandbox
inbox got away from me over the weekend, sweep it?
on it. 41 unread since friday. archiving the noise, drafting the rest.
ComputerDone

Sweeping Gmail back to Friday.

Compared

Sandboxes for AI agents compared
SandboxRuns onKeeps between sessionsBest for
BoatHosted Ubuntu VM in the EUIts disk and each bot's Chrome profileMany bots with separate logins
E2BHosted Linux sandboxIts files, paused with the computerPublic or multi-user deployments
DaytonaHosted Linux sandboxIts diskTeams already on Daytona
NovitaHosted Linux sandboxFiles, browser logins and running programsBots that pick up where they left off
RailwayYour Railway accountThe workspace Rakazo savedRunning everything in one Railway account
WuyingYour Alibaba Cloud Windows desktopThe desktop's own diskWindows apps, Alibaba Cloud and mainland China
DockerYour own server or computerEach bot's home folder, on your diskSelf-hosting with no cloud account
KubernetesYour own cluster, one pod per computerThe workspace Rakazo saves, or a volumeTeams that already run Kubernetes
Your computerYour Mac or PC, no isolationEverything; it's your machineBots that need your real apps and logins

Pricing compared

Every price on these pages is for one person's bots, which share one computer by default: 2 vCPU and 4 GB of memory, enough for a Linux desktop, Chromium and a terminal, running 4 hours a workday (88 hours a month) or around the clock (720 hours). Rakazo gives each person one team computer per space, plus one for each bot you give a computer of its own, so for a space where N people use bots, multiply by N. Rakazo stops or pauses a hosted computer after 10 minutes without use, so you pay for roughly the hours bots work. Where a provider or Rakazo can't use that size, the row says which size it prices.

On Rakazo Cloud you don't pay a sandbox provider: computers run on Boat and come with the plan, and the pricing page lists the computer hours each plan includes. The table is for a self-hosted Rakazo, where you bring your own provider.

What a bot computer costs on each option Rakazo supports
OptionHow you payFree to start88 hours a monthAround the clock
BoatPer second, $20 monthly minimum7-day trial, 25 hours$20, the minimum$20, the minimum
E2BPer second. Pro plan $150 a month$100 one-time credit$14.57$119.23. Hobby sessions end hourly; Pro ($269.23) allows 24 hours
DaytonaPer second, no plan fee$200 credit$14.57$119.23
NovitaPer second, no plan fee$100 credit after a survey$10.26$83.98
RailwayPer second for CPU and memory used, from $5 a month$5 trial creditAbout $18 at typical use, plus about $16 for the app and databaseAbout $150 for the computer
WuyingHourly or monthly, plus diskAlibaba Cloud promotions varyAbout $17 at 4 vCPU / 8 GiB, the closest published sizeAbout $57 on the unlimited plan
DockerYour own serverFree softwareA €16.49 server fits Rakazo and about 6 computersSame
KubernetesYour nodes, plus a control-plane fee on some cloudsFree softwareA $96 DigitalOcean node fits about 3 computersSame
Your computerNothing extraFreeElectricityAbout $3 for a Mac mini

Prices in US dollars unless marked, from each provider's pricing page, checked November 2026. Your model provider bills separately. Usage before free credits. Rakazo can't run Boat at 2 vCPU / 4 GB: self-hosted installs use 4 vCPU / 8 GB machines, which cost $20 and $25.92, and larger Rakazo Cloud plans use larger ones. Each option's page shows the rates and assumptions behind its numbers.

  • For a few hours a day, per-second providers are cheapest. Novita has the lowest rate of the hosted options Rakazo supports, and E2B and Daytona charge the same as each other.
  • Boat's $20 minimum covers about 555 hours of the bigger computer self-hosted Rakazo uses, and it covers every computer on the account, so it is cheaper than E2B or Daytona once your computers run more than about 120 hours a month between them, and by far around the clock.
  • A server you rent for Docker costs the same whether bots work or not. It's the cheapest way to run many computers, if you're happy to look after it.

Hosted sandboxes compared, including ones Rakazo doesn't support

Most sandboxes that come up as E2B alternatives are built for running code, not a desktop a person can watch. Modal, Vercel Sandbox, Northflank and Blaxel are good at that, and the table includes them for reference, but Rakazo doesn't support them. Rakazo also works with CreateOS and boxd, which don't have their own page here; the computer providers guide covers them.

Hosted sandboxes for AI agents compared
SandboxIn RakazoIsolation88 hours at 2 vCPU / 4 GBLongest sessionKept when stoppedSelf-host or your cloud
BoatYes. Rakazo Cloud runs on itFull VM per machine$20, the monthly minimum. Rakazo's smallest Boat size is 4 vCPU / 8 GB, which is also $20No fixed cap. Rakazo renews a 2-hour lease while in useDiskNo
E2BYesFirecracker microVM$14.57, or $164.57 with the Pro plan1 hour on Hobby, 24 hours on ProMemory and disk, when pausedOpen source (Apache-2.0). Your cloud on Enterprise
DaytonaYesContainers, which is how Rakazo creates them. VMs available outside Rakazo$14.57No capDisk. Memory only on VM sandboxesClosed source since June 2026. Your cloud on Enterprise
NovitaYesNot stated$10.261 hour free, 24 hours paidMemory and disk, when pausedNo
RailwayYesVMabout $18, billed on CPU and memory actually usedIdle timeout up to 2 hours, or offNothing. Rakazo restores the saved workspaceNo
CreateOSYes, set up from the computer providers guideFirecracker microVM$10.44 plus disk. Rakazo's default 2 vCPU / 2 GB shape is $8.40Not publishedMemory and disk, when paused. Both still billedNo
Modal SandboxesNogVisor, VM runtime optional$20.94. The free plan's $30 monthly credit covers it24 hoursFilesystem snapshots. Memory snapshots are in alphaNo
Vercel SandboxNoFirecracker microVMAbout $9.72 at 10% CPU, $29.99 at full CPU45 minutes on Hobby, 24 hours on ProFilesystemNo
NorthflankNomicroVM (Kata, Cloud Hypervisor) or gVisor$5.87No capDiskYour cloud or on-premises
BlaxelNomicroVM$14.57, billed on memory onlyNot publishedMemory, in standbyNo

Prices in US dollars unless marked, from each provider's pricing page, checked November 2026. Your model provider bills separately. Usage only, before free credits, at each provider's default region. Vercel bills CPU only while it is busy, so its price depends on how hard the bot works.

  • None of the code-first sandboxes ships a desktop for a person to watch and take over, keeps each bot's browser logins apart, or saves a workspace that survives a switch of provider. Rakazo adds those on every provider it supports.
  • Session caps matter for agents. E2B's Hobby plan, Novita's free tier and Vercel's Hobby plan end a session within an hour, so a bot on a long research task needs a paid plan or a provider without a cap.
  • Daytona closed its source in June 2026. E2B is now the main open source hosted sandbox, and Northflank the main one that runs in your own cloud.

Isolation: containers, gVisor and microVMs

How strongly a sandbox separates a bot from everything else depends on what sits between them. Containers share the host's kernel, so a kernel bug can let a process out. gVisor puts a kernel written in user space in the way. A microVM gives every sandbox its own small kernel behind a hypervisor. Stronger boundaries cost a little speed and, on your own hardware, need virtualization support.

Isolation in AI agent sandboxes
BoundaryWho uses itGood forTrade-off
ContainerDocker, Kubernetes by default, Daytona by defaultYour own bots on your own serverShares the host's kernel
gVisorModal, GKE Sandbox, Kubernetes with a runtime classStronger isolation without a hypervisorSlower system calls
microVM: Firecracker, Kata, Cloud HypervisorE2B, CreateOS, boxd, Vercel Sandbox, Northflank, Kubernetes with KataOther people's bots and public instancesNeeds KVM on your own hardware
Full VMBoat, Railway, WuyingLong-lived computersSlower to start than a microVM
NoneYour computerWork that needs your real appsA bot can reach everything you can

Every option

How to choose

You want it hosted

Boat is what Rakazo Cloud runs its own bot computers on: full Linux VMs where every bot keeps its own Chrome logins, for a $20 monthly minimum. E2B is the option Rakazo's live computer tests run on, gives every computer its own microVM, and pauses idle computers instead of deleting them. Novita pauses with memory, so a bot comes back to the same open programs, at the lowest hourly rate. Daytona keeps each computer's disk, has no session cap, and suits teams already using it.

You want the smallest bill

If bots work an hour or two a day, a per-second provider such as Novita or E2B costs a few dollars a month. If they work most of the day, Boat's flat minimum or a Docker server you rent is cheaper. Cheapest of all is a spare machine you already own.

You don't want a cloud account

Docker is the default when you self-host Rakazo: each bot gets a locked-down container with a desktop, on your own machine. Kubernetes runs one pod per computer on a cluster you already have, with gVisor or Kata if you want VM-level isolation.

You want one bill

Railway runs Rakazo, its database and the bot computers from one template. The trade-off is that computers are rebuilt from saved files after they stop, so open programs don't survive.

You run bots for other people

For a public or multi-user instance, keep computers off the server that runs Rakazo and behind a VM boundary: E2B or Boat hosted, or Kubernetes with gVisor or Kata on your own cluster.

You need Windows, or you're in mainland China

Wuying lets bots use a Windows cloud computer you already have on Alibaba Cloud, which also works where other sandbox providers are hard to reach.

You want your bots on your real apps

The Rakazo desktop app can let bots use your own computer, with your files, apps and logins. That isn't a sandbox, so only turn it on for bots you'd trust unattended.

FAQ

What is an AI agent sandbox?

An isolated computer where an agent can run commands, use a browser and change files without touching your own machine. In Rakazo it's the bot's computer, which you can watch and take over.

How much does an AI agent sandbox cost?

Hosted sandboxes charge about $0.12 to $0.17 an hour for 2 vCPU and 4 GB while running, as of November 2026, so a computer used 4 hours a workday costs about $10 to $15 a month. Boat has a $20 monthly minimum that covers far more hours. Self-hosting costs whatever your server does.

What is the cheapest sandbox for AI agents?

A spare computer running Docker, which costs only electricity. Among the hosted options Rakazo supports, Novita has the lowest hourly rate and Boat is cheapest for computers that run most of the day.

Is the E2B sandbox free?

E2B's Hobby plan has no monthly fee and a one-time $100 credit, but sessions end after an hour. See E2B pricing.

Does Rakazo support Modal or Vercel Sandbox?

No. Rakazo supports Boat, E2B, Daytona, Novita, Railway, Wuying, CreateOS, boxd, Docker, Kubernetes, Incus and your own computer. Modal and Vercel Sandbox are compared above for reference.

Do I need a sandbox provider to run Rakazo?

No. When you self-host, Docker computers work out of the box with no cloud account. Hosted providers are optional.

Can I switch providers later?

Yes. Rakazo keeps its own saved copy of each bot's workspace, so a new computer on another provider starts from the last saved version. Let bots finish and their computers stop before you switch, so recent changes are saved first. Software installed outside the workspace doesn't move.

Is Docker a real sandbox for AI agents?

It's a real boundary but not the strongest. Rakazo's containers drop every Linux capability and cap memory, CPU and processes, but they share the host's kernel. For bots you don't fully trust, pick a provider that gives each computer its own kernel as Rakazo uses it: E2B and CreateOS (Firecracker microVMs), boxd (microVMs), Boat and Railway (full VMs), or Kubernetes with Kata. gVisor on Kubernetes is a middle ground. Not every hosted sandbox qualifies: Rakazo creates Daytona computers as Daytona's default containers, which share the host's kernel, and Novita doesn't say what it uses.

Sources