Why FullsendAI
Agents do more
with a computer.
A chat box can only talk. Give an agent a desktop, a browser and a terminal, and it can do the work, while you watch and step in.
What your agent gets.
Everything it needs to finish the job, and everything you need to trust it.
A computer of its own
Each agent gets its own computer with a real desktop, a browser and a terminal. It can install things, open apps and test what it builds, like you would.
You stay in control
Watch live, take the mouse and keyboard whenever you like, point at something on screen, and rewind or record what happened.
Any model, one key
Use the model that suits the job and switch mid-chat. The same key works in Claude Code, Codex, Cursor and your own code.
Work that keeps
Workspaces can start clean, save their files and sleep, or stay on all the time. Projects and teams keep it organised.
Measured, not claimed.
Model speed timed through FullsendAI, each run with its sample size and date.
| Model | First token, median | Output speed, 1,500-token replies |
|---|---|---|
| DeepSeek V4.1 FlashComing soonn=20 · Oct 15, 2026 | First token, median0.39 s | Output speed, 1,500-token replies162 tok/s |
| GLM 5.3 FlashComing soonn=20 · Oct 15, 2026 | First token, median1.25 s | Output speed, 1,500-token replies34 tok/s |
Isolated. Private by default.
Where your work runs, and what we keep of it, stated plainly.
Isolated computers
Every computer runs in its own sandbox, with its own files and network, and only ever sees its own workspace.
Encrypted workspaces
Saved workspaces are encrypted before they are stored, with a key made for each snapshot.
Every model hosted in the USA
Every model on FullsendAI runs on servers in the United States. Requests are never routed abroad, not even when a backup takes over.
API prompts aren’t stored by default
For API calls we keep what billing needs. Turn on body storage for a project to debug, and its requests and replies are kept for 30 days, then deleted. Web chat conversations are saved to your account; delete them any time.
The details: every model’s data handling, data privacy and our privacy policy.
Built for people who get things done.
If the work happens on a computer, an agent can help.
Developers
Features, fixes and tests, checked in a real browser before you look.
Researchers and analysts
Reading, comparing and collecting from many sites at once, with sources.
Operations
The repetitive browser and desktop work nobody wants, done while you do something else.
Security teams
Authorized pentests and red-team work on an isolated computer, with models built for security work.
Give your agent a computer.
Add a card or credit to start. You only pay while your agent works.
Get started