VoIP client privacy ratings
Voice-over-IP apps.
6 voice calls are rated against 4 public criteria, and 6 have enough evidence for a letter grade. Of the 3 with a known jurisdiction, 1 is based in a Five Eyes country, and 2 in the wider Fourteen Eyes.
Open-source voice calls only · Criteria for this category · Suggest an addition · Markdown
| Name | Grade | Score | Data | Jurisdiction | Open source | No trackers or telemetry | No ads or data sales | Independent audit |
|---|---|---|---|---|---|---|---|---|
Portable, modular SIP client with audio and video calling, mainly used from the command line. It supports SRTP, ZRTP and many audio and video codecs. |
Grade B | 80 | 100% | – | Yes | Yes | Yes | No |
Open source, low-latency voice chat client and server (Murmur) for groups, with encrypted connections and self-hosted servers. |
Grade C | 65 | 100% | – | Yes | Partial | Yes | No |
Open source SIP softphone for audio and video calls and instant messaging, with end-to-end encrypted chat and apps for Android, iOS, Windows, macOS and Linux. Developed by Belledonne Communications. |
Grade D | 50 | 100% | France Nine Eyes | Yes | No | Yes | No |
Lightweight portable SIP softphone for Windows, built on the PJSIP stack, for voice and video calls through any SIP provider. |
Grade F | 30 | 100% | – | Yes | No | No | No |
SIP softphone from Securax in Bulgaria for desktop and mobile, with a free version and a paid Pro licence that adds features. |
Grade F | 20 | 100% | Bulgaria Outside Eyes | No | No | Yes | No |
Paid caller ID spoofing service that places calls and texts showing a phone number the user chooses. Closed source, and calls and recordings pass through SpoofCard's servers. |
Grade F | 0 | 100% | United States Five Eyes | No | No | No | No |
Questions
What is the most private option among voice calls?
No pick has been made yet. The table above is sorted by score, based on public evidence.
How are voice calls rated?
Each entry answers 4 questions: open source, no trackers or telemetry, no ads or data sales and independent audit. Answers need links to evidence. See the full criteria.
Does jurisdiction matter?
Jurisdiction decides which laws can compel a provider to hand over data. Each entry shows its country and whether it is in the Five, Nine or Fourteen Eyes. The data a provider can hand over depends mostly on what it stores and who holds the keys. Read about jurisdictions and the CLOUD Act.