Protocol
Providers that ship a closed protocol of their own. A category: the point of the term is that the implementation cannot be read, which is a property rather than a name.
A proprietary protocol is one a provider designed and ships closed — the source is not published and nobody outside the company can read it. Hydra and Chameleon are examples. The category says the implementation is unreadable, not that it is bad.
On security that is the whole difference: there is no independent review of the cryptography or of what the client sends home, so a claim about it rests on the provider’s word and whatever an audit covered. Against the open protocols on this list it is a step down in evidence, whatever its actual strength.
Proprietary
Four of the twelve terms — obfuscated, proprietary, vendor_open, wireguard_derived — are categories rather than protocol names: each says a protocol was disguised, closed or built on another, not which one it is. A record that publishes no protocol list at all appears on none of these pages (sixteen on file).
More protocols
Coverage—not published
Paying monthly—no monthly plan
Paying yearly$35.88yearly total
Free tierNopaid plans only
Devices10at once
Security
Usability
Coverage100countries
Paying monthly$16.45monthly
Paying yearly$79.00yearly total
Free tierNopaid plans only
Devicesunlimitedat once
Security
Usability
Coverage96countries
Paying monthly$11.99monthly
Paying yearly$47.99yearly total
Free tierYeslimited free plan
Devices5at once
Security
Usability
Coverage54countries
Paying monthly—no monthly plan
Paying yearly$44.99yearly total
Free tierNopaid trial only
Devices6at once
Security
Usability
Coverage—not published
Paying monthly$9.99monthly
Paying yearly$19.00yearly total
Free tierNopaid trial only
Devices1at once
Security
Usability
Coverage80countries
Paying monthly$12.99monthly
Paying yearly—no yearly plan
Free tierYeslimited free plan
Devices10at once
Security
Usability
Coverage63countries
Paying monthly$9.99monthly
Paying yearly$47.88yearly total
Free tierYesfree, no data cap
Devices10at once
Security
Usability
Coverage—not published
Paying monthly—no monthly plan
Paying yearly$49.99yearly total
Free tierNopaid trial only
Devices5at once
Security
Usability
Coverage37countries
Paying monthly$14.99monthly
Paying yearly$89.99yearly total
Free tierNopaid trial only
Devices5at once
Security
Usability
Coverage—not published
Paying monthly—no monthly plan
Paying yearly$29.00yearly total
Free tierYeslimited free plan
Devices10at once
Security
Usability