BAS vs ZennoPoster, Selenium and Playwright: Choosing by the Task

The “BAS versus everything else” argument is usually held about the wrong thing. These tools apply at different points: one hands you ready-made infrastructure for browser automation in exchange for flexibility, the other hands you full freedom in exchange for time. Choose from the task and from who will maintain it.

What BAS gives you out of the box

The strength of BAS is not “programming with a mouse” - it is the built-in infrastructure you would otherwise write yourself:

• Browser profiles and fingerprint substitution as a feature, not an assembly of libraries.
• Multithreading with per-thread profile and proxy isolation.
• Input distribution across threads without races.
• Captcha solving and code reception as ready modules.
• Compilation into an application with a UI that you can hand to a client.

That last point is often what decides it. Writing a scraper in Playwright is a day’s work. Turning it into a program a non-technical person operates - with settings, threads and a protected source - is an entirely different job.

What BAS does not give you

Honestly about the weak spots:

• Version control. A project is not text, so there is no meaningful git diff. On a large project with two people that hurts.
• Automated tests. No familiar unit testing of logic; verification means running it.
• Ecosystem. Need a specific library? Python has it; here you work around it with built-in languages or an external process.
• Platform. The ecosystem is Windows-oriented, which dictates where the bot will live.
• Complex logic. Branching that takes ten lines in code sprawls into an action tree that is hard to read six months later.

ZennoPoster

The closest analogue: same class of work, same visual approach, same audience. The differences live in interface details, the module set and habit - which is exactly why the “which is better” argument so rarely ends.

The practical difference that affects the decision: BAS has a free version capable of building and compiling a complete bot. That makes “is this tool right for my task” cheap to answer - you can take a prototype to working condition without buying anything. More on the limits in free version vs premium.

If you are already fluent in one of them, the right answer is almost always “stay”. Speed comes from accumulated experience and your own library of solutions, not from the tool.

Selenium and Playwright

A different world: these are developer libraries, not applications. What you get in exchange:

Upside: full control, real git, tests, CI, any library in the language, cross-platform support, easy integration into an existing service.

Downside: everything BAS ships ready, you build yourself. Profile management, proxy rotation, a thread manager that hands out accounts, captcha service integration, a UI for the client - that is weeks of work, not checkboxes. Evasion is its own topic: bare Playwright is detectable by anti-bot systems, and getting it to blend in becomes a permanent arms race.

Choose code when: you have a developer, the automation plugs into an existing product, you need tests and CI, the target environment is Linux, or the logic is complex and heavily branched.

Choosing without the argument

Four questions that usually settle it:

1. Who maintains this in a year? If not you and not a developer - visual builder.
2. Who operates it? If it is a client who needs a program with a button, BAS wins on compilation and UI.
3. Do you need accounts, profiles and fingerprints? If yes, BAS saves weeks. If it is a plain public-data scraper, code is simpler.
4. What does it plug into? A standalone Windows program - BAS. Part of an existing Linux service - code.

The bad criterion is “which is more powerful”. Both families solve the same problems; the difference is how much you spend getting there, and who can fix it the next time the site changes its markup.