Best proxies for Selenium browser automation: ISP vs rotating residential vs datacenter
A lot of Selenium proxy problems are not really Selenium problems.
One common issue is session instability. For example, a browser profile logs in from one IP, loads the next page from another IP, then hits a dashboard from a third IP. Even if the code is working, the session can look suspicious or unstable.
Quick breakdown:
Static Residential / ISP proxies
Best for login-based workflows, account sessions, dashboards, and anything that needs one stable identity.
Rotating Residential proxies
Best for large-scale public web data collection, especially when you need broader IP diversity. Usually not ideal for logged-in sessions unless rotation is controlled.
Datacenter proxies
Best for speed, QA testing, low-risk scraping, and internal automation. They are cheaper and fast, but easier to detect on sensitive sites.
Mobile proxies
Best for mobile-first platforms or cases where mobile carrier IPs are needed, but usually more expensive.
Selenium tips:
- Keep the same IP during login and session flow.
- Use sticky sessions when stability matters.
- Avoid rotating too aggressively.
- Keep geo, language, timezone, and browser fingerprint consistent.
- If you keep getting 403s or CAPTCHA loops, check IP reputation, rotation timing, headers, and session consistency before blaming Selenium.
I wrote a longer guide here with setup notes and common failure points: