Short answer: Maybe — but only for a narrow set of legitimate use cases and when you understand the limitations, costs, and legal/ethical risks. For most people they’re not worth it.

Why people buy “antidetect” browsers

• Purpose: mask or change browser fingerprints (user agent, canvas, WebGL, fonts, plugins, etc.) so multiple accounts/identities look like different real users.
• Typical legitimate uses: QA/testing (how sites behave for different devices/regions), privacy research, managing many benign marketing or customer-support accounts while reducing accidental cross-linking.
• Typical commercial/grey uses: multi-account affiliate/sneaker/ads operations and account farming — many vendors of these tools target those markets.

What they actually deliver — and their limits

• They can change many browser-visible attributes and isolate profiles better than a default browser.
• They do NOT guarantee anonymity or permanence. Fingerprinting techniques (canvas, audio, timing, TLS, IP/port behaviors, hardware signals, behavioural analytics) evolve quickly; vendors and detectors play an arms race.
• Poorly configured tools or cheap/resold fingerprints can be easily detected. Integration with low-quality proxies or reused fingerprints defeats the purpose.
• Using them often raises legal/ToS issues if used to evade bans, commit fraud, or impersonate others.

Risks and downsides

• Legal and policy risk: evading blocks or committing fraud is illegal/unethical and can result in account bans, civil liability, or criminal charges.
• Operational cost/complexity: you’ll need reliable residential/proxy infrastructure, isolated OS/VMs, careful workflow separation, and ongoing maintenance.
• False sense of security: they can increase complexity and still get detected.
• Vendor risk: some vendors log activity, sell data, or provide weak/duplicated fingerprints.

When they might be worth it

• You run a legitimate business need that requires managing many distinct, long-lived accounts and you can invest in proper proxies, infrastructure, and compliance (e.g., large-scale social media marketing under each client’s consent; automated testing across many device profiles).
• You need controlled, repeatable testing of how sites respond to different browser/fingerprint combinations.
• You’re doing privacy research in an ethical/legal way and need profile isolation.

When they’re not worth it

• You want a quick privacy boost for casual browsing — use privacy-focused browsers (or Tor) and good proxy/VPN practices instead.
• You’re seeking a low-cost way to evade bans, run fraud, or “cheat” in marketplaces — expensive and risky, and likely to fail long-term.

How to evaluate if you’re considering one (checklist)

• Define your legitimate use case and required ROI.
• Trial first: does vendor offer a trial and clear documentation?
• Fingerprint uniqueness: can you test profiles against public fingerprint tests and see realistic diversity?
• Proxy support: does it integrate with quality residential/ISP proxies (not cheap datacenter IPs)?
• Isolation: how complete is profile isolation (cookies, storage, OS-level artifacts)?
• Logging/privacy: vendor logs? retention policy? where are servers located?
• Compliance: legal counsel or compliance review for your use case.
• Support and updates: vendor reaction to new fingerprinting techniques.
• Community reputation: independent reviews, forums, and warnings.

Alternatives to consider

• For privacy: Tor, Brave, Firefox with strict privacy settings, cookie/container isolation extensions.
• For multi-account work: use separate virtual machines/containers, separate devices, strong proxy setup, and discipline around workflow separation.
• For testing: cloud device farms, real-device testing, or dedicated QA tools.

Bottom line Antidetect browsers are a specialized tool that can be worth the investment only if you have a clear, legitimate business need, budget for high-quality proxies and maintenance, and are prepared for an ongoing technical arms race. For casual privacy or low-stakes multi-account use they’re usually overkill and risky.

If you want, tell me your specific use case and budget and I’ll give a targeted assessment (legal/compliance considerations included).