Delta Chat vs Klak
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Delta Chat
A decentralized instant messenger prioritizing privacy and ease of use. It allows secure communication with friends, family, and groups without requiring personal data like phone numbers. The app is flexible, reliable in challenging network conditions, and built on open-source principles.
- Private instant onboarding
- No phone number required
- Mutual consent for messaging
- Multiple chat profiles
- Works in bad network conditions
- End-to-end encryption
- Run with own email/server
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Delta Chat is a reliable decentralized instant messenger that is easy and fun to use for friends, family, groups and organizations. Delta Chat is developed by a dedicated FOSS contributor community that jointly releases refinements and new features several times a year, across many stores and platforms world-wide. Features at a glance: • Private. Instant on-boarding without a phone number or other private data. • Friends & Family: Only chat with people you know. Unknown users cannot message or follow you without mutual consent. • Flexible. Supports multiple chat profiles and is easy to setup on multiple devices. • Reliable. Works under bad and adversarial network conditions. • Secure. Audited End-to-End encryption safe against network and server attacks. • Sovereign. Can be run with your own e-mail address or server. • FOSS. Fully Open Source/Free Software, built on Internet Standards.
Klak
Connect to any WiFi network and instantly join a group chat with others in the same physical location. Share advice, deals, or simply say hello to people nearby.
- Connect to WiFi for group chat
- Localized conversations
- Share advice and deals
- Meet people nearby
- Ad-free experience
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Every WiFi is a group chat. College, conference, club, office, bobba shop, coffee shop, hotel, hostel, high school, pre school (ok, not there), airport, church, the mall, the gym, the zoo. If you are somewhere then connect to the WiFi and open Klak and join the group chat. If a shared space has WiFi then it has its own group chat. Say hi, get advice, share the deal you snagged, meet a few people, maybe more.. Take a break from posting to the world and random chats with randos 1000miles away. Here its only randos on the WiFi. Klak is a work in progress. Tells us about problems in app or in your love life or anything else: hello@klak.app ----Klak---- Every WiFi = Group chat
Screenshots
Verdict
Delta Chat and Klak both sit at 4.4 stars, but that hides the real split: 100% of Klak's written reviews are positive against 63% of Delta Chat's. Klak also leads on update cadence (weekly vs every 3 weeks) and iOS requirement (12.1 vs 15.6). Delta Chat's advantage is ratings volume (129 vs 6). On price, rating, 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.
On the App Store both sit at effectively the same score — 4.4 for Delta Chat against 4.3 for Klak. That said, the two scores are not equally well evidenced: Delta Chat has 129 ratings behind it against 6, so its average is the more settled of the two. Written reviews are what separate them: 63% of Delta Chat's written reviews are positive against 100% of Klak's.
Delta Chat ships an update every 3 weeks, Klak weekly. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.
| Parameter | Delta Chat | Klak |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (129 ratings) — better | 4.3 (6 ratings) |
| Positive reviews | 63.2% of reviews | 100.0% of reviews — better |
| Number of ratings | 129 — better | 6 |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.6 | 12.1 — better |
| Further details — not scored | ||
| Size | 60 MB | 70 MB |
| Age rating | 4+ | 17+ |
| Developer | merlinux | Bruce Bolton |
Customer experience
Delta Chat
Klak
In-app purchases
Delta Chat
No in-app purchases
Klak
No in-app purchases
