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GoodbyeDPI vs Ultrasurf: catalog facts
GoodbyeDPI	Ultrasurf
Free Free and open source under the Apache 2.0 licence.	Free Free to download and use.
Windows	Windows
Works against both passive and active DPI Runs locally without a remote proxy or VPN server	Traffic is disguised as ordinary TLS web traffic Small, portable download that needs little setup
Windows only Requires administrator privileges	Closed source, so its security claims cannot be independently audited Focused on getting past censorship rather than full VPN features
Downloadable app	Downloadable app
Open source	Closed source
License: Apache-2.0	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.