Short answer — it depends on your needs. The most widely used antidetect / multi‑account browsers in 2024–25 are Multilogin, GoLogin, AdsPower, Kameleo, Linken Sphere and (for simpler, extension‑based sessions) SessionBox. Each targets slightly different users: enterprise teams and automation, solo marketers, mobile‑style fingerprints, or lightweight tab isolation. (multilogin.com)

Quick vendor snapshot

• Multilogin — enterprise‑grade platform, cloud or local profiles, built‑in proxy support, automation APIs and team management. Good for large teams and automation workflows. (multilogin.com)
• GoLogin — easy dashboard, included proxy options, API/automation integrations and mobile fingerprint emulation; popular for account managers who want a balance of ease and power. (gologin.com)
• AdsPower — feature‑rich, actively updated antidetect browser optimized for ad/affiliate workflows, strong profile/proxy management and collaboration features. (adspower.com)
• Kameleo — granular fingerprint customization (desktop + mobile emulation), good automation hooks (Selenium/Puppeteer) and local/cloud profile options; aimed at technical users. (kameleo.io)
• Linken Sphere — powerful, highly configurable Chromium fork with session pools, hybrid modes and advanced proxy/session features (favored by advanced users). (linkensphere.info)
• SessionBox — browser extension that creates isolated tab sessions inside your normal browser; lighter‑weight and cheaper but less “antidetect” than full standalone products. (chromewebstore.google.com)

How to choose (short checklist)

• Scale & team features: need role management, shared cloud profiles, or SSO? Favor Multilogin, AdsPower, GoLogin. (multilogin.com)
• Automation / API: do you need robust Puppeteer/Playwright/Selenium/API support? Look at Kameleo, GoLogin, Multilogin. (kameleo.io)
• Mobile-first accounts (TikTok/Instagram): choose tools with mobile fingerprint emulation (Kameleo, GoLogin). (kameleo.io)
• Proxy integration: if you don’t want to manage proxies separately, pick a platform with built‑in residential/mobile proxy options (GoLogin, Multilogin, AdsPower). (gologin.com)
• Budget & simplicity: SessionBox or browser profiles/containers (Firefox Multi‑Account Containers or Chrome profiles) are inexpensive options for benign multi‑login tasks. (chromewebstore.google.com)

Safer / legitimate alternatives

• Firefox Multi‑Account Containers and standard browser profiles let you run multiple accounts with cookie separation without third‑party antidetect tooling — good for social accounts, testing, and privacy. (support.mozilla.org)
• Full VMs or cloud testing browsers (BrowserStack, local VMs) give stronger isolation when you need it for QA or development (not an antidetect product, but legitimate for testing).

Important legal/ethical notes (read before you buy/use)

• These products are dual‑use: they have legitimate applications (QA, ad ops, community management, research) but can also be used to violate websites’ terms of service or commit fraud. Using them to evade bans, commit deception, or break platform policies can lead to permanent account suspensions and legal exposure. Use only for permitted activities and follow each site’s rules.
• Check corporate policy and local law before deploying multi‑account tooling at scale. If you manage client accounts, maintain clear consent, logging and access controls.

If you want, I can:

• recommend 1–2 specific products tailored to your exact use case and budget (e.g., small‑team ad ops vs. developer automation), or
• give a short comparison table (features, price tier, API support, proxies, best use case).