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Outline VPN vs Outline Keeper: catalog facts
Outline VPN	Outline Keeper
Free The open-source software is free. Cloud hosting is paid separately.	Free Free and open source under the Apache 2.0 license.
Windows, macOS, Linux, Android, iOS	Android
Shadowsocks transport resists the blocking that stops ordinary VPNs Manager application makes server creation and key sharing simple	Manages Outline servers from a phone Uses the official Outline Server Management API
You pay for and run the server yourself Access keys are shared secrets; anyone with one has your server	Only useful if you run Outline servers Not a VPN client itself
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: Apache-2.0
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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