Test and scripting frameworks

BrowserOS neo vs Selenium

Selenium proves the application works across browsers. neo runs the checks nobody could justify automating.

Selenium drives Chrome, Firefox, Safari and Edge through the W3C WebDriver standard, from Java, Python, C#, Ruby or JavaScript, and spreads runs across machines with Grid. It is the oldest and by far the most portable option on this site.

BrowserOS neo is one Chromium browser on your own machine. It holds the logins you already use, and any agent that speaks MCP works in its own tabs inside it.

[ 01 ]

The short version

Choose BrowserOS neo when

The job is work rather than a test.
It runs behind a login and you would rather not script the sign-in.
You want a replay and an audit trail of what actually happened.
You want it installed in one step, not stood up.

Choose Selenium when

You must cover Safari or Firefox, not just Chromium.
Your team writes Java, C# or Python and is not moving.
You need a grid running suites across many machines.
A vendor-neutral standard matters to your organisation.

[ 02 ]

Side by side

BrowserOS neo compared with Selenium, row by row.
Dimension	BrowserOS neo	Selenium
Browsers covered	BrowserOS neoChromium only.	SeleniumChrome, Firefox, Safari and Edge, through one standard interface. Nothing else here comes close.
What drives it	BrowserOS neoAny MCP agent, in plain language.	SeleniumYour code, in almost any language.
Logged-in sites	BrowserOS neoImport your Chrome logins once, into a profile kept for agents.	SeleniumTests start clean by design. You script the login, or load cookies you saved earlier.
Scale	BrowserOS neoOne browser on your machine, several agents inside it.	SeleniumGrid across many machines. Built for suites, not errands.
Seeing what happened	BrowserOS neoLive cockpit, then a scrubbable replay, on by default.	SeleniumScreenshots, logs and whatever your reporter captures.
Price	BrowserOS neoFree. You bring your own model keys.	SeleniumFree. No model in the loop, so no token cost.

The row worth pausing on is browsers covered, and it is Selenium’s. Four engines through one standard, which is what the project exists for.

That is a question about the suite. Most of a QA week is spent around it: reproducing a ticket, sweeping staging, confirming a fix behind a login. None of that is cross-browser work, none of it is written down, and that is the part neo takes.

[ 03 ]

Most of QA never became a test case.

A suite holds the cases that earned automation. Around it sits the rest of the week: exploratory passes, reproducing what a customer reported, checking a build on staging, confirming a fix behind SSO, verifying figures in an admin panel. That work is manual because writing it up as code costs more than carrying it out.

neo runs those as tests without making them test code. Describe the case, the agent performs it in a browser already signed in to your environments, and every run replays, so a reproduction becomes a recording instead of a list of steps somebody has to follow.

Selenium keeps proving the application works across browsers. neo takes the checks nobody could justify automating, which on most teams is the larger half.

[ 04 ]

Common questions

Can I use BrowserOS neo for QA?

Yes, that is what it is for. Exploratory passes, reproducing a reported issue, sweeping a staging build, confirming a fix behind SSO: describe the case and the agent performs it in a browser already signed in to your environments.

Does BrowserOS neo replace Selenium?

No. There is no test runner, no assertions and no Grid. Selenium proves the application works across browsers. neo takes the checks around that suite, the ones nobody could justify writing up as code.

How does an agent run a test case?

You write the case the way you would hand it to a colleague, in plain language. The agent carries it out, and the run replays afterwards, so a failed check comes with a recording of exactly where it went wrong.

Can BrowserOS neo test my site on Safari?

No. neo is Chromium only. Cross-browser coverage is what Selenium is for, and that part of testing is not something neo attempts.

[ 05 ]

Check it yourself

Every claim about Selenium here was read off these pages on 16 September 2026. If something has gone stale, tell us.

What we could not confirm

We did not set up Selenium Grid ourselves; the scale claims come from its documentation.

[ 06 ]

Other comparisons

Give your agent a browser it can sign into.

Free, open source, and it sits beside the browser you already use.