# CollaChat vs Atom Messenger

The clearest difference is update cadence: Atom Messenger at every 3 weeks against CollaChat's every 2 months. CollaChat's advantage is device support (4 vs 1) and iOS requirement (14.0 vs 16.0). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CollaChat ships an update every 2 months, Atom Messenger every 3 weeks. The most recent releases landed on September 19, 2026 and September 6, 2026 respectively.

## The numbers

| Metric | CollaChat | Atom Messenger |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/collachat/id1546363298/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 288 MB | 42 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [CURL TECH PTE. LTD.](https://appshunter.io/developer/1546363300) | [igloocy s.r.l.](https://appshunter.io/developer/1691843040) |

## What reviewers say

### CollaChat

[App page](https://appshunter.io/ios/app/collachat/id1546363298)

A decentralized, open-source messaging app focused on privacy and data security. It leverages blockchain technology for peer-to-peer communication, offering end-to-end encryption and user control over data storage.

**Highlights:** Decentralized communication network, End-to-end message encryption, Open-source client and server, Multi-device support (Web/Mobile/Desktop), Group chats and calls, Message self-destruction and recall, Contact and chat locking

**In-app purchases:** none


### Atom Messenger

[App page](https://appshunter.io/ios/app/atom-messenger/id6450101210)

**In-app purchases:** none


## Frequently asked questions

### Is CollaChat free?

CollaChat is free to download, with no in-app purchases.

### Is Atom Messenger free?

Atom Messenger is free to download, with no in-app purchases.

### Do CollaChat or Atom Messenger have ads?

Neither CollaChat nor Atom Messenger shows ads.

### Which is updated more often, CollaChat or Atom Messenger?

CollaChat ships an update every 2 months, and Atom Messenger every 3 weeks. Most recently, CollaChat was updated on September 19, 2026 and Atom Messenger on September 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*