SKI+ v2 vs PeerLink X
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SKI+ v2
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SKI+ v2 is an end-to-end instant messaging app with in-depth support of post-quantum encryption algorithms. Message encryption and decryption are completed on the user's device, and the server has no access to these details. Therefore, it provides users with a more privacy-protected messaging system. For more details, please refer to https://www.e2eelab.org. Feel free to download and use it. If you have any questions or suggestions, please send relevant descriptions or screenshots to: ziv@citi.sinica.edu.tw. We will address your inquiries promptly.
PeerLink X
A private, open-source messenger offering secure chats, group conversations, and voice/video calls. It allows users to maintain control over their communication infrastructure through self-hosted server options.
- Private messaging
- Group chats
- Voice and video calls
- Open-source code
- Self-hosted infrastructure
- Custom server configuration
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PeerLink X is a private, open-source messenger for secure chats, group conversations, voice and video calls, and self-hosted communication. Stay connected with friends, family, teams, and communities while keeping more control over the infrastructure used for your communication. PRIVATE MESSAGING Send private messages through a clean and modern chat interface. PeerLink X is designed for everyday personal and team communication. GROUP CHATS Create group conversations for friends, families, teams, projects, and communities. VOICE & VIDEO CALLS Make voice and video calls directly from PeerLink X and communicate without switching between multiple apps. OPEN-SOURCE MESSENGER PeerLink X is open source. The source code of both the mobile application and server components is publicly available for review. Open-source development makes it possible to inspect how the application works and independently deploy the communication infrastructure. SELF-HOSTED SERVERS PeerLink X supports self-hosted communication infrastructure. Advanced users, teams, and organizations can run their own servers instead of depending entirely on a centralized messaging service. FLEXIBLE SERVER CONFIGURATION PeerLink X supports configurable Bootstrap, Relay, and TURN servers. Server configuration can be added to the application using a QR code available on the official PeerLink X website. RELIABLE CONNECTIVITY Relay and TURN support helps PeerLink X maintain communication across different networks and network configurations. PRIVACY-FOCUSED COMMUNICATION PeerLink X is designed around private communication and reducing unnecessary dependence on centralized services. KEY FEATURES • Private messaging • Group chats • Voice calls • Video calls • Open-source code • Self-hosted messenger infrastructure • Custom server configuration • Bootstrap, Relay and TURN support • QR-based initial server setup • Modern and simple interface PeerLink X is designed for users looking for a private messenger, secure chat app, open-source messenger, self-hosted chat, private voice calls, video calls, and greater control over their communication infrastructure. OPEN SOURCE & SELF-HOSTED Application source code: https://github.com/simplegear-org/peerlink Server source code: https://github.com/simplegear-org/peerlink_servers Official website, server configuration and QR setup: https://simplegear.org
Screenshots
Verdict
The clearest difference is iOS requirement: PeerLink X at 15.0 against SKI+ v2's 17.6. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
SKI+ v2 ships an update fortnightly, PeerLink X weekly. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.
| Parameter | SKI+ v2 | PeerLink X |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Fortnightly | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 249 MB | 59 MB |
| Age rating | 4+ | 4+ |
| Developer | Academia Sinica Research Center for Information Technology Innovation | Vladimir Zarkov |
In-app purchases
SKI+ v2
No in-app purchases
PeerLink X
No in-app purchases








