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