E2B vs Replit

E2B is an API that gives each agent session its own small Linux microVM, built for many short jobs that pause and resume. Replit is an AI app builder: you describe an app, Replit Agent writes it, and Replit hosts it.

The companies and products

E2B

E2B calls itself the AI agent cloud: an API that gives each agent session its own isolated Linux machine.

Every E2B sandbox is a Firecracker microVM that boots from a snapshot, so it starts fast and can be paused and resumed with its memory. You build custom sandboxes from templates based on a Docker image, and drive them from Python or JavaScript SDKs. It is built for teams that run many short code, data or agent jobs, and its runtime is open source.

Isolation: Firecracker microVM per sandbox
Regions: US by default; EU and APAC on Pro and above, enabled by support
Open source: Runtime published under Apache-2.0, can run on your own Linux host with KVM
Bring your own cloud: Enterprise data plane in your AWS, GCP or Azure account
Compliance: SOC 2 Type II; HIPAA BAA on request
Machine size: 1 to 8 vCPU and 1 to 8 GiB RAM, CPU only

Replit

Replit is an AI app builder and hosting platform: you describe an app in chat, Replit Agent writes it, and Replit publishes it.

You work in a browser workspace where Replit Agent sets up the project, writes the code, tests it and fixes problems, with system packages managed by Nix. When the app is ready you publish it as an Autoscale, Static, Scheduled or Reserved VM deployment, with Postgres and object storage next to it. It is built for people and teams who want a working app, not for programs that need to create many machines by API, so this page compares the parts where the two overlap.

Kind of product: AI app builder with workspaces and app hosting, not a sandbox API
Hosting: Data is hosted mainly in Google Cloud data centers in the United States, with an optional India region
Regions for published apps: North America, Europe, Asia, South America and Australia on Core, Pro and Enterprise; the free plan publishes to North America
Isolation: Not documented: the security page promises strong logical separation between users but does not say containers or VMs
Plans: Starter (free), Core $20 a month, Pro from $100 a month, Enterprise custom; plan fees come back as usage credits
Compliance: Says it has a SOC 2 Type 2 attestation

Which use cases each one fits

For each use case, Battleships prices every sandbox provider on the same workload and sorts them from the cheapest monthly bill up. “16th cheapest of 367” means 15 of the other 366 providers run that workload, with every feature it needs, for less. “With limits” means the provider runs it but misses something, so it is listed after every full match. Open a use case for its whole ranking and what each provider misses.

Use case and its workload	E2B: price rank	Replit: price rank	bochka: price rank
Software factory 100 at once · 4 vCPU / 8 GB · 2,200 sessions of 8 h a month E2B fits a software factory, with sandboxes created from its SDKs and Docker inside, while Replit's MCP server drives Replit Agent one app at a time; bochka adds no session cap and /dev/kvm.	16th cheapest of 367 $4,143 a month	181st of 367, with limits $2,000 a month	3rd cheapest of 367 $634 a month
Always-on AI employees 50 machines 24/7 · 2 vCPU / 4 GB An assistant that lives on its machine all month hits E2B's 24-hour session cap and must pause and resume, and on Replit it becomes a Reserved VM app billed all month; bochka simply keeps running.	51st of 366, with limits $5,348 a month	202nd of 366, with limits $2,033 a month	5th cheapest of 366 $657 a month
Code interpreter bursts 100 at once · 1 vCPU / 2 GB · 200,000 sessions of 1 min a month E2B is built for this: short code runs that start fast, pause with their memory and wake on the next request, while Replit's Autoscale is a web host, not a code runner.	37th cheapest of 345 $421 a month	228th of 345, with limits $146 a month	186th of 345, with limits $2,000 a month
Sandboxes for your users 300 at once · 2 vCPU / 4 GB · 30,000 sessions of 23 min a month E2B can give each user a sandbox that wakes on the next request, Replit does not publish how many deployments can run at once, and bochka ranks 1st here.	23rd cheapest of 361 $2,354 a month	233rd of 361, with limits $825 a month	Cheapest of 361 $209 a month
RL rollouts 1,000 at once · 2 vCPU / 4 GB · 1,000,000 sessions of 3 min a month E2B ranks 2nd here: its memory forks and high start rate suit many short rollouts that branch from the same state.	2nd cheapest of 360 $9,384 a month	258th of 360, with limits $4,226 a month	34th of 360, with limits $2,000 a month
Agent evals 250 at once · 4 vCPU / 8 GB · 15,000 sessions of 20 min a month	78th cheapest of 364 $1,975 a month	265th of 364, with limits $685 a month	10th cheapest of 364 $200 a month
CI runners 40 at once · 8 vCPU / 16 GB · 6,000 sessions of 12 min a month CI jobs that build containers or Android apps need Docker and nested virtualization; E2B has Docker but no /dev/kvm, Replit documents neither, and bochka has both.	337th of 377, with limits $1,429 a month	275th of 377, with limits $425 a month	4th cheapest of 377 $86 a month
24/7 dev boxes 1 machine 24/7 · 4 vCPU / 8 GB A Replit workspace is a good place to code by hand and E2B stops sessions at 24 hours, while bochka gives a dev box with no cap, Docker, systemd and a dedicated IP.	192nd of 368, with limits $358 a month	165th of 368, with limits $109 a month	18th cheapest of 368 $26 a month
Computer-use agents 50 at once · 4 vCPU / 8 GB · 20,000 sessions of 15 min a month E2B has a Linux desktop for computer use, Replit's VNC pane only shows a desktop to a person, and bochka streams its desktop at 60fps and can embed it in your app.	32nd cheapest of 369 $1,342 a month	190th of 369, with limits $619 a month	6th cheapest of 369 $200 a month
Browser-use agents 50 at once · 2 vCPU / 4 GB · 30,000 sessions of 10 min a month	100th of 367, with limits $746 a month	229th of 367, with limits $317 a month	7th cheapest of 367 $200 a month
Scraping & bots (startup scale) 50 at once · 1 vCPU / 2 GB · 100,000 sessions of 3 min a month	57th cheapest of 346 $554 a month	234th of 346, with limits $217 a month	6th cheapest of 346 $90 a month
Mass scraping & bots (undetectable) 1,000 at once · 1 vCPU / 2 GB · 3,000,000 sessions of 2 min a month	227th of 338, with limits $9,223 a month	150th of 338, with limits $4,378 a month	71st of 338, with limits $1,800 a month
Parallel red teaming 200 at once · 2 vCPU / 4 GB · 5,000 sessions of 30 min a month	11th cheapest of 360 $1,043 a month	208th of 360, with limits $215 a month	2nd cheapest of 360 $200 a month
GPU eval jobs 10 at once · 8 vCPU / 32 GB · 500 sessions of 30 min a month	Can't run it	Can't run it	Can't run it
macOS agents 5 at once · 4 vCPU / 8 GB · 1,000 sessions of 20 min a month	Can't run it	Can't run it	Can't run it

Key features

Feature	E2B	Replit	bochka
Kind of product	Sandbox API: each agent session gets its own isolated Linux machine	AI app builder with browser workspaces and app hosting	Sandboxes you create, stop and fork by API, SDK or CLI
Isolation	Firecracker microVM with its own kernel	Not documented; the security page says strong logical separation between users	Full VM with its own kernel on dedicated AMD Ryzen 9 9950X hosts
Creating machines from code	Python and JavaScript SDKs create sandboxes from templates built on a Docker image	MCP server tools to create, update and publish apps; no API to start many machines	API, SDK and CLI to create, stop, resume and fork many sandboxes
CPU benchmark (4 vCPU / 8 GB)	12.61 runs/s	Not measured	26.69 runs/s
Biggest machine	Up to 8 vCPU / 8 GiB self-serve, more on request	Reserved VM sizes such as 4 vCPU / 16 GB; workspace CPU and memory per plan are not published	Up to 16 vCPU / 32 GB on the $100 plan and above
Session length	Up to 1 hour on Hobby, 24 hours on Pro; pausing resets the clock	A Reserved VM runs continuously as one published app	No cap on paid plans; you set the time to live
Pause, wake and fork	Pauses with memory and resumes in about 1 second; wakes on the next request; forks a running sandbox with its memory	Autoscale starts on the first request and goes idle after 15 minutes; Agent checkpoints at milestones	Disk saved every minute and on stop; fork a running sandbox with its disk; no wake on request
Docker and nested virtualization	Docker inside; nested virtualization not supported	System packages come from Nix; the docs do not describe Docker, systemd or /dev/kvm	Docker, root, systemd and /dev/kvm on every machine
Reaching the machine	HTTPS URL per port, public by default unless you turn on a token; no dedicated IP	Published apps on HTTPS domains and custom domains; SSH into the workspace on paid plans	HTTPS URLs for up to 50 ports, token-protected; raw TCP; dedicated IPv4 or IPv6; SSH
Coding agents	Templates and guides for many agents, run through the command API	Replit Agent, which you can also drive from an MCP client	Claude Code, Codex and five other agents preinstalled, with a prompt, steer and events API
Keeping API keys out of the sandbox	Secrets injected into outbound HTTPS headers (private beta)	Replit manages keys for OpenAI, Anthropic, Google and OpenRouter models; other keys are secrets in the app	Credentials proxy for model providers and any HTTPS API; switch a credential to another account when credits run out
Desktop and computer use	Linux desktop for computer use	VNC pane that streams a desktop to your browser; no computer-use API	60fps desktop and Chromium, computer use and browser control, embeddable stream
Regions	US by default; EU and APAC on Pro and above, enabled by support	North America, Europe, Asia, South America and Australia for published apps on Core and up	EU only: Germany, Finland, France

Every feature Battleships tracks (43)

Feature	E2B	Replit	bochka
Full VM (own kernel)	Yes	Yes	Yes
Docker inside	Yes	No	Yes
Nested virtualization	No	No	Yes
Root	Yes	Not published	Yes
Systemd	Yes	No	Yes
Desktop GUI	Yes	Yes	Yes
Browser	Yes	No	Yes
Computer-use API	Yes	No	Yes
SSH	Yes	Yes	Yes
Persistent disk	Yes	Yes	Yes
Pause/resume	Yes	No	Yes
Automatic snapshots	Yes	Yes	Yes
Fork/clone	Yes	Yes	Yes
Live fork (no pause)	Yes	No	Yes
Memory fork	Yes	No	No
Custom image (Docker or snapshot)	Yes	Yes	Yes
≥24 h sessions	Yes	Yes	Yes
Idle auto-stop	Yes	Yes	No
Wake on request	Yes	Yes	No
HTTPS preview URLs	Yes	Yes	Yes
Raw TCP inbound	No	Not published	Yes
Public IPv4	No	No	No
Egress allowlist	Yes	No	No
Secret proxy	Yes	Yes	Yes
Secret proxy for any API	Yes	No	Yes
Preinstalled agents	Yes	Yes	Yes
Agent harness API	No	Yes	Yes
MCP server	Yes	Yes	No
GPU	No	No	No
Windows	No	No	No
Arm64	No	Not published	No
Self-hosting	Yes	No	No
BYOC	Yes	No	No
Open source	Yes	No	No
Scoped API keys	Not published	Not published	Yes
Spend limits	Yes	Yes	Yes
Usage per sandbox (API)	No	Yes	Yes
Audit logs	Not published	Yes	No
SSO	No	Yes	No
SOC 2	Yes	Yes	No
HIPAA	Yes	No	No
EU data residency	Yes	Yes	Yes
Zero data retention	Not published	Not published	Yes

Performance

E2B12.61 runs/s

ReplitNot measured

bochka26.69 runs/s

E2B and bochka were measured in the same StarSling hpc-sandbox-benchmarks run, a Node.js build-and-test loop at 4 vCPU / 8 GB: E2B did 12.61 runs per second and bochka did 26.69, about twice as much CPU work. Replit is not in that benchmark, so we cannot say how fast it is. This measures CPU speed only, not start time.

Node.js build-and-test loop at 4 vCPU / 8 GB, higher is better. Measured with the open hpc-sandbox-benchmarks suite. Replit has no published run in this suite yet, so there is no like-for-like number to compare.

Pricing in five scenarios

Each bill is priced from the providers' public price lists by the open Battleships engine, with the cheapest plan that runs the scenario.

Scenario	E2B, a month	Replit, a month	bochka, a month
One coding agent, workdays 4 vCPU / 8 GB, 50 GB disk, 8 hours a day, 22 days a month, files kept between days	$202 · Pro	$122 · Pro $100 (annual) · with limits	$20 · $20/mo
One agent that never stops 4 vCPU / 8 GB, 50 GB disk, running 24/7 all month	$368 · Pro · with limits	$122 · Pro $100 (annual) · with limits	$26 · $20/mo
50 agents in parallel 50 machines of 4 vCPU / 8 GB at once, 8-hour sessions, 1,100 sessions a month, Docker inside	$2,773 · Pro	$1,330 · Pro $1,000 (annual) · with limits	$317 · $20/mo × 3 seats
Sandboxes for your users 2 vCPU / 4 GB, 30,000 sessions of 10 minutes a month, up to 300 at once	$1,395 · Pro+ (600 concurrent)	$403 · Pro $250 (annual) · with limits	$200 · $100/mo × 2 seats
1,000 short jobs at once 2 vCPU / 4 GB, 1,000 at once, 3 minutes each, 200,000 jobs a month	$2,797 · Pro++ (1,100 concurrent)	$825 · Pro $1,000 (annual) · with limits	$2,000 · $2000/mo · with limits

E2B: E2B bills per second for the vCPU and RAM you set, idle time included, until you pause or kill the sandbox. Pro costs $150 a month for higher limits with no usage credit, and more concurrency costs $500 a month per 500 slots.

Replit: Replit plans (Core $20, Pro from $100) turn into monthly credits for Agent work and hosting, then usage is pay-as-you-go. A Reserved VM has a fixed monthly price per size, such as $130 for 4 vCPU / 16 GB, busy or idle; Autoscale bills only while it serves requests.

Replit: Plans start at $20 a month, and the whole fee is usage credit spent per second on running sandboxes. A stopped sandbox costs nothing and keeps its disk.

Limits in those scenarios

E2B caps a session at 24 hours on Pro and includes 20 GiB of disk, so an agent that runs all month does not fit without pausing and resuming. Replit is marked as not a fit in every scenario because it is an app platform: each always-on machine is a published Reserved VM app, it does not publish how many can run at once, and it does not document Docker. For 1,000 short jobs at once, E2B Pro++ only queues bursts above 300 starts a minute, while bochka's $2,000 plan caps starts per hour and per day.

Scenario	E2B	Replit	bochka
One coding agent, workdays	disk beyond 20 GiB: price unknown egress price not published	different kind of product: app platform monthly / always-on product: priced as 1 machines kept on and reused	None that bite
One agent that never stops	Pro: sessions capped at 24 h disk beyond 20 GiB: price unknown egress price not published	different kind of product: app platform	None that bite
50 agents in parallel	egress price not published	adjacent product, not a like-for-like sandbox missing persistent disk, Docker inside different kind of product: app platform how many machines can run at once: limit not published, probably fine at 50 (the typical published limit is 50)	None that bite
Sandboxes for your users	egress price not published	adjacent product, not a like-for-like sandbox different kind of product: app platform not confirmed: how many machines can run at once (you need 300; the typical published limit is 50)	None that bite
1,000 short jobs at once	egress price not published bursts above 300 starts/min are queued (a burst of 333 takes ~2 min to start)	adjacent product, not a like-for-like sandbox different kind of product: app platform not confirmed: how many machines can run at once (you need 1,000; the typical published limit is 50)	max 2,400 starts/day (needs ~6,667) max 600 starts/hour (needs ~1,000) bursts above 90 starts/min are queued (a burst of 333 takes ~4 min to start)

Which one should you use?

Use E2B when

your code runs many short jobs that start fast, pause with their memory between requests, or branch from the same state.

Built for short jobs by API. Useful when your code starts many short sandboxes: E2B pauses one with its memory and resumes it in about a second.
Wake on request and memory forks. A paused E2B sandbox wakes on the next request, and a running one can be forked with its memory into many copies.
Open source and outbound rules. Its runtime is Apache-2.0 and can run on your own host, and you can limit which hosts a sandbox reaches.

Use Replit when

you want Replit Agent to build a web app from a description and host it for you, with a database, sleeping when idle and regions outside Europe.

An app built and hosted for you. Useful if you want a working app from a description: Replit Agent builds, tests and publishes it with Postgres and storage.
Hosting that costs nothing when idle. Useful for web apps with uneven traffic: Autoscale wakes on the first request and costs nothing while idle.
Regions on five continents. Useful if your users are spread out: Replit publishes apps in North America, Europe, Asia, South America and Australia.

Where bochka fits

If what you are really running is coding agents that work for hours, neither fits well: E2B is tuned for short jobs and stops at 24 hours, and Replit is an app builder, not a sandbox API. bochka gives each agent a full VM by API that runs as long as it needs, with Docker, a desktop and agents you drive from outside.

No 24-hour stop, no month-long bill

E2B Pro ends a session at 24 hours, so your code must pause and resume long tasks. Replit's always-on option is a Reserved VM, one published app billed all month. bochka has no cap and a stopped sandbox costs nothing.

Docker, systemd and /dev/kvm, on a faster CPU

E2B runs Docker but has no nested virtualization, so Android emulators and VMs cannot start, and Replit's docs describe neither Docker nor systemd. bochka has all of them, and did 26.69 runs/s to E2B's 12.61 on the CPU benchmark.

Agents and keys handled from outside

On E2B you build the agent harness yourself and its secrets injection is in private beta. Replit's MCP server drives only Replit Agent, and other API keys sit in the app as secrets. bochka has a prompt, steer and events API and a credentials proxy for any HTTPS API.

Use bochka when your agents do real work for hours: installs, builds, tests, Docker, emulators and a browser, on a fast full VM your code starts by API and that never cuts them off. Compare it one to one: bochka vs E2B and bochka vs Replit.

Questions people ask

Is E2B cheaper than Replit?

Replit's bill is lower in every scenario we priced, for example $122 on Replit against $202 on E2B for one coding agent on workdays, but Replit fits none of them because it is an app platform. bochka comes to $20 for the same agent and $317 for 50 agents in parallel, against $2,773 on E2B.

Which is faster, E2B or Replit?

E2B did 12.61 runs per second on the StarSling CPU benchmark at 4 vCPU / 8 GB. Replit is not in that benchmark, so there is no fair comparison. bochka did 26.69 runs per second in the same run as E2B.

Can E2B or Replit run Docker?

E2B runs Docker inside its sandboxes but does not support nested virtualization. Replit sets up environments with Nix packages and its docs do not describe Docker. Every bochka sandbox has Docker, root, systemd and /dev/kvm.

Can a machine run for days on E2B or Replit?

On E2B, not in one session: it stops after 24 hours on Pro and 1 hour on Hobby, though pausing resets the clock. A Replit Reserved VM runs continuously, but it is one published app billed all month. bochka has no session cap on paid plans.

Is Replit a sandbox for AI agents like E2B?

Not in the usual sense. E2B and bochka let your code create machines by API, while Replit is an app builder where Replit Agent writes and publishes apps, driven from outside only through its MCP server.

Where does my data run?

E2B runs in the US by default, with EU and APAC on Pro and above. Replit hosts data mainly on Google Cloud in the United States and publishes apps on five continents on Core and up. bochka runs only in the EU, in Germany, Finland and France.

Try bochka

Install the CLI, then run bochka new.

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