Rethink is an Android client for DNS over HTTPS, DNS over Tor, and DNSCrypt, with a WireGuard proxifier, firewall, and connection tracker.
Open source
18 alternativesOpen SSTP Client
Use this open-source Android client to connect through the Secure Socket Tunneling Protocol (MS-SSTP).
About Open SSTP Client
Open SSTP Client is an open-source Android app for connecting to VPN servers that use the Secure Socket Tunneling Protocol (MS-SSTP). The author states that it was developed for accessing VPN Azure Cloud or SoftEther VPN Server, and that testing with other servers was not done. The app can be installed from Google Play, and some earlier versions are available as APK files on the releases page. It is licensed under MIT.
The project lists several limits. The author says its behavior may still be unstable and that a server must enable DHCP. Only PAP and MS-CHAPv2 authentication are supported, and EAP is not. Servers using self-signed certificates require installing the certificate on the device and disabling the Verify Hostname option. The host field cannot include a port number. The author does not officially support Windows Server, and states that debugging help is limited to problems that can be reproduced in the author's own environment. The author advises using the software at your own risk.
Key features
- Connects Android devices to MS-SSTP VPN servers
- Saves and loads connection profiles from the upper-right menu
- Option to limit trusted SSL certificates to a chosen directory
- Choice of PPP network protocol, including an IPv6 option
- Custom DNS server address routed through the VPN tunnel
- App-based rules to allow or disallow apps from using the tunnel
Best for: Android users who need to connect to an MS-SSTP VPN server, such as Azure VPN or SoftEther VPN Server, and who can work within the listed limits.
Good for
- Open source and licensed under MIT
- Available through Google Play, with earlier APK versions on the releases page
- Supports saving and loading connection profiles
Watch out for
- The author states that its behavior may still be unstable
- Tested only with Azure Cloud and SoftEther VPN Server, with no testing on other servers
- Does not support EAP authentication, and the server must enable DHCP
Open SSTP Client at a glance
- Category
- Privacy & Security › Mobile Privacy
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Android
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Open SSTP Client FAQ
Which authentication methods does the client support?
Only PAP and MS-CHAPv2 can be enabled. EAP is not supported.
Can the host field include a port number?
No. The host preference can contain an IP address but cannot include a port number.
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