box by Simular vs E2B Desktop
box by Simular and E2B Desktop side by side: a ready computer for the agent you already use, or a sandbox SDK to build your own.
E2B is a sandbox platform developers build on through SDKs, with a Linux desktop template. box by Simular is a ready cloud computer that the agent you already use reaches through one MCP link, with no code to write.
The short answer: choose box by Simular if you want your existing agent to use a computer today, with no SDK; choose E2B if you are building your own agent product and need sandboxes at scale, SOC 2 or your own cloud.
box by Simular vs E2B Desktop, side by side
| Capability | box by Simular |  E2B Desktop |
|---|---|---|
| Full-stack computer | Ubuntu desktop with Chrome, files and terminal; 4 vCPU / 8 GB on the Small and Medium tiers, 2 vCPU / 4 GB on the Free tier; 20 GB disk | Ubuntu XFCE desktop with LibreOffice, a browser and a file manager |
| Works with the agent you already use | One hosted MCP link for Claude, ChatGPT and Gemini; one install command for Claude Code, Codex, Cursor, OpenCode, Hermes, OpenClaw and VS Code; DeepSeek Harness and any other MCP client too | Built through SDKs; no hosted MCP to drive a sandbox (its local MCP server was archived in April 2026) |
| One computer, many agents | Every agent you connect shares one box and picks up the others’ work, with the same files and logins | You connect each agent to a sandbox in your own code |
| Keeps your setup and logins | Keeps programs, files and logins between sessions; on the Free and Small tiers the box sleeps when idle and wakes when your agent connects; on the Medium tier it never sleeps. On the Free tier, a box asleep 14 days in a row is deleted | Pause keeps disk and memory; a run lasts at most 1 h (Hobby) or 24 h (Pro) |
| Built for computer use | Full-stack control, screenshots last; GUI plans and scripts for multi-step desktop work | Click, type, screenshot and window tools; no element finding or screen-settle wait found |
| Speed and cost of computer use | Most direct route first, screenshots last, several steps in one call; saved tasks replay without model calls | No recorded-flow replay found; snapshots and forks restore state |
| Watch and take over | Live view, take control, time-limited share link (view-only, or let their AI use the box too) | noVNC stream, interactive by default |
| Price | Free tier: a 2 vCPU / 4 GB box with 5,000 credits once (about 50 box-hours, valid 90 days). Small tier, $19/month: a 4 vCPU / 8 GB box that sleeps when idle, with 5,000 credits a month. Medium tier, $39/month: a 4 vCPU / 8 GB box that never sleeps, with 10,000 credits a month. Annual billing: 2 months free | Hobby is free with a one-time $100 credit; about $0.33/h at 4 vCPU / 8 GB (custom sizes need Pro); Pro $150/month plus usage |
Competitor facts are from each company’s public site and docs, checked 12 November 2026. box by Simular facts are from its docs and plans as of November 2026.
Why your agents need a computer
Offload
Offload long tasks
Hand a long task to the box: your agent works on the box’s desktop while your own computer stays free.
Hand off
Agents that work together
Claude starts the job and ChatGPT picks it up. Files, logins and apps stay put when you switch.
Signed in
Logins already inside the box
Sites you’ve signed in to stay signed in on the box, ready for any agent you bring in. Logins stay in Chrome on the box.
Full stack
Control of the whole computer
Desktop apps, browsers, files, terminal and downloads, not just a browser tab.
Use cases
From your terminal
Any coding agent can use a computer now
- Who
- Users of DeepSeek Harness, Claude Code and other coding agents
- The ask
- “Open my staging site in Chrome, sign up as a new user and tell me what breaks.”
- What box does
- With the box plugin added, DeepSeek Harness opens Chrome on the box, signs up with a test email and screenshots each failed step. DeepSeek Harness’s own computer use is experimental and runs on your machine; box gives it a separate cloud desktop.
- The result
- A list of broken steps with screenshots, from a real browser.
Running several agents
Multiple agents, one shared cloud desktop
- Who
- People running several agents a day across Claude, ChatGPT and more
- The ask
- “ChatGPT, put this week’s competitor prices into the sheet I left open. Claude, write the summary from that sheet.”
- What box does
- Both agents connect to the same box. The sheet, files and logins stay there, so each picks up the other’s work.
- The result
- One sheet and one summary, with no copy and paste between apps.
From your chat
Switch AI, keep your logins
- Who
- Claude or ChatGPT subscribers who mostly chat
- The ask
- “ChatGPT, use my box: check last month’s orders on the shopping sites I signed in with Claude, and tell me which haven’t shipped.”
- What box does
- ChatGPT opens Chrome on the box, where you signed in once while using Claude. Same browser, same logins, so nothing needs setting up again. You take control if a site asks for a code.
- The result
- A list of late orders back in your chat, with no new sign-ins after switching AI.
What box by Simular gives you
- Built on computer-use research. box takes the most direct route first, uses screenshots only as a last resort, runs several steps in one call and replays saved tasks without model calls. Faster, cheaper, reliable computer use. Read the research.
- Watch or take over. Live view at any time. Step in to sign in. box’s own agent never enters payment details; it hands that step to you, and agents you connect are told to do the same.
- One box for every agent. All your agents share the same box and pick up each other’s work. Your own AI keeps using its own plan. Credits pay for the Free box’s time, extra boxes, residential IP and box’s own model calls: 5,000 once on the Free tier (valid 90 days), and 5,000 or 10,000 a month on Small and Medium tiers.
FAQ
Is box by Simular a sandbox like E2B?
No. E2B gives developers sandboxes to build on. box by Simular provides a computer your existing agent uses through one link, with a live view you can take over.
Can Claude Code use E2B Desktop directly?
Not through a hosted MCP link; you set it up with E2B’s SDK. Claude Code adds box by Simular with one command.
When does E2B fit better?
When you build your own agent product and need many sandboxes, SOC 2 or HIPAA, or E2B running in your own cloud.
How do I start with box by Simular?
Add box to Claude, ChatGPT, Gemini or your coding agent once, then ask for a task. Read the Quick Start.
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