ShardX is a free antidetect browser from the ProxyShard team. It stores profiles locally, includes prepared fingerprint sets, supports HTTP and SOCKS5, and can proxy WebRTC and QUIC through UDP-capable proxies.
Best for
Solo work with 10–30 profiles without a subscription.
Gmail, Twitter, Discord, testing, and everyday multi-accounting.
Local automation through API, CDP, Playwright, or Puppeteer.
What to consider
Profiles are stored locally; 100 profiles may use roughly 20–50 GB.
The local format is less convenient for teams and work across several computers.
For WebRTC and QUIC, use a SOCKS5 proxy with UDP support when possible.