Alternatives to Lumicall for all platforms with any license

Signal

TextSecure and RedPhone have been merged to create Signal! Using Signal, you can communicate instantly while avoiding SMS fees, create groups so that you can chat in...

Free Open Source Mac Windows Linux Android iPhone ... Android Tablet iPad Chrome Ubuntu Touch
Apps with End-to-End Encryption Encrypted chat Security focused Video calling ... Encrypted calls Encrypted Connection Privacy-friendly Self destructing messages Video calling Voice Call Client side encryption Color coding Electron based Encrypted VoIP calls Forward Secrecy Group chat Group Messaging Integrated File Sharing Mobile friendly Night mode/Dark Theme Works Offline Open Source apps Protected by Password Based on phone number Privacy focused Private messaging File Sending Voice messages Add a feature

460 Like
Linphone

Linphone is an internet phone or Voice Over IP phone (VoIP). With Linphone you can communicate freely with people over the internet, with voice, video, and text instant...

Free Open Source Mac Windows Linux Web Windows Mobile ... Android iPhone Android Tablet Windows Phone iPad Xfce
Encrypted VoIP calls Live Push Notifications Video calling Add a feature

111 Like
Ekiga

Ekiga (formely known as GnomeMeeting) is an open source VoIP and video conferencing application for GNOME. Ekiga uses both the H.323 and SIP protocols. It supports many...

Free Open Source Windows Linux PortableApps.com
Portable No login Video calling Add a feature

68 Like
CSipSimple

csipsimple will allow native sip for android device. It relies on the pjsip SIP stack and use the pjsip-jni project. The use of this native library will ensure a...
- Discontinued Possibly discontinued. App hasn't been updated since November 30, 2014.
Free Open Source Android
Call hold Call Transfer Multi Account Switching Nativ Address Integration Add a feature

35 Like
Sipdroid

Free and open-source SIP/VoIP Client.

Free Open Source Android
No features added Add a feature

3 Like
CallProtector

Encrypted secure Calls with CallProtector! App available on iOS & Android With CallProtector you can call others in a secure way, you only need working...

Free Android iPhone
Encrypted calls Encrypted chat Add a feature

2 Like
Adamant Messenger

A top-notch anonymous MESSENGER encrypted in blockchain. A Blockchain-based system for data and message transfers along with an integrated payment system are providing...

Free Open Source Web Android iPhone Android Tablet iPad
Anonymity Based on Blockchain Encrypted chat Encryption ... Apps with End-to-End Encryption Add a feature

0 Like
Q-municate

The open-source cross-platform video calling and instant messaging app from QuickBlox.

Free Web Android iPhone Android Tablet iPad
Video calling Add a feature

0 Like
KeeperChat

KeeperChat - The leading secure messaging app. • Private vault for messages, photos and videos • Private, encrypted media gallery (nothing is saved on device’s...

Freemium Mac Windows Android iPhone Windows S ... Android Tablet Windows Phone iPad
Customizable Encrypted chat Apps with End-to-End Encryption Group chat ... Integrated Password Manager Self destructing messages Two factor authentication Video calling Add a feature

0 Like