Portelon is a browser, for humans and agents. Your agents use it signed in as you, in invisible tabs of their own. When one needs you, it shows you its tab. When it’s done, it hands you the page.
Free to browse. Agents: 14 days free, no card needed.
By downloading Portelon, you agree to the Terms of Service.
Agents
It works with the agent you already use. Claude Code, Codex, OpenCode, GitHub Copilot, Cursor, Antigravity, Devin, Cline, Zed and Kimi Code connect in one click, from Portelon’s welcome page. Any other agent that supports MCP connects with one command.
Agents drive it through one persistent JavaScript REPL. They read pages and act on them, run several tabs at once, and read, render and fill PDFs, scanned ones included.
Your tabs, their tabs
You and your agents share one browser. They use your profile, so they’re signed in wherever you are. Their tabs never appear on your screen, in your taskbar or in your history, so several agents can work at once without getting in your way.
When an agent needs you, for a passport check or a payment, it shows you that one tab.
When it’s finished, it hands you the page, as it is, in your own window.
Benchmarks
It is first on every benchmark we ran.
Research
| Rank | Agent | Score | Cost per task |
|---|---|---|---|
| 1 | Portelon | 98.7% | $0.19 |
| 2 | Exa Agent Ultra | 93.9% | $1.39 |
| 3 | Perplexity Agent | 89.7% | $1.23 |
| 4 | Exa 3.0 | 88.2% | unknown |
Research
| Rank | Agent | Score | Cost per task |
|---|---|---|---|
| 1 | Portelon | 90.1% | $10.35 |
| 2 | Exa Agent Ultra | 81.4% | $18.82 |
| 3 | Perplexity Agent | 40.1% | $29.50 |
Action
| Rank | Agent | Score | |
|---|---|---|---|
| 1 | Portelon | 87.1% | |
| 2 | BrowserCode + GPT-6.1 Sol | 79.6% | |
| 3 | BrowserCode + GPT-6 Astra | 77.9% | |
| 4 | Browser Use BU fast | 72.9% |
Action
| Rank | Agent | Score | |
|---|---|---|---|
| 1 | Portelon | 90.7% | |
| 2 | BrowserCode + GPT-6 Astra default | 84.6% | |
| 3 | Browser Use Pi + GPT-5.6 Luna max | 71.9% |
How we ran them. Portelon ran in the Codex harness, through its app-server, with GPT-6.1 Sol as the main agent at xhigh reasoning effort and up to four concurrent GPT-6.1 Terra subagents, also at xhigh. Each agent ran its search queries through Serper, to avoid rate limits across concurrent runs. It ran the first 200 tasks of DeepSearchQA, the first 100 of WANDR and the first 180 of BU Bench v2.1. Exa benchmarked the other agents on DeepSearchQA and WANDR, on up to 200 tasks, except Exa 3.0, which Exa benchmarked on an undisclosed number of tasks. Browser Use benchmarked the other agents on BU Bench v2.1, on 180 tasks, and on Odysseys2.
For you
It’s a perfectly good browser for you, too. It blocks ads and trackers itself, from the first request a page makes.
It runs on your computer, and we don’t see your browsing. It sends no usage statistics or crash reports, and it contacts Google only to keep you safe or to do what you’ve asked: every server it contacts is listed.
Websites see the same browser whether you’re using it or an agent is, visible or not, so bot detection rarely gets in the way.
Price
Browsing is free. Agents are free for 14 days, no card needed, and then $10 a month, plus applicable tax. One subscription covers you on five devices at once, servers and CI included.
Christopher Gait-Smith
Founder, Portelon, Inc.
Enclosed
Portelon, for Linux, Windows and macOS.
By downloading Portelon, you agree to the Terms of Service.
P.S.Portelon, Inc. was largely set up by agents working in Portelon, down to its phone number.
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Formed the company, and applied for its tax number
The agent researched the route and prepared the formation documents, proofreading them by rendering 66 pages. It took the incorporation order to checkout and checked the signing packet before the founder signed. The next morning it filled in the SS-4 application inside the PDF, faxed it to the IRS and kept the receipt.
- Time3 h 57 min
- Sites30
- Hand-offs7
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Opened its bank account
The agent filled in a US business bank application from documents in the founder’s inbox, stepping aside for his password, his passport and his signature. When the bank asked a company with no revenue to prove its source of funds, it wrote the letter, checked the typesetting, and filed it.
- Time1 h
- Sites17
- Hand-offs6
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Got its D-U-N-S number, and its email
Apple’s D-U-N-S lookup kept answering “unavailable”. The agent read the page’s own JavaScript, showed the fault was on Apple’s side, and filed with Dun & Bradstreet directly, attachments and all. While it waited, it set up the company’s email domain: the founder signed in to Cloudflare in a tab the agent showed him, and the agent entered six DNS records. The number was issued two days later.
- Time44 min
- Sites9
- Hand-offs10
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Chose the photograph on its New Tab page
Five agents went through more than 30,000 photographs, among them one photographer’s entire portfolio of 19,345, NASA’s astronaut archive and a dozen museum collections. The one chosen is the sunrise in Fig. 1.
- Time4 h 32 min
- Sites18
- Hand-offs0
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Set up its sign-in, email and payments
“You’re signed into everything I am,” the founder told the agent. It set up the company’s Google sign-in, Cloudflare tokens, email sending and Stripe keys through his logins, and handed him the window only for the four boxes a human had to tick. No secret was ever printed into its context. About 45 minutes after the go-ahead, the account service was running on staging, its end-to-end test passing.
- Time1 h 22 min
- Sites7
- Hand-offs4
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Read up for its Terms
Before we wrote our Terms, four agents read 31 legal documents from Google, Apple, Amazon, Meta and Microsoft, and about 180 pages of statutes, cases, guidance and commentary from the EU, the UK and the US. A fifth opened our production logs to make sure the privacy policy told the truth.
- Time59 min
- Sites62
- Hand-offs0
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Chose its phone number
The agent compared eight providers, opened the signup for the founder to verify, and searched for a number ending in 1300. Then it wrote the greeting and set the hours.
- Time26 min
- Sites11
- Hand-offs3