Comparison

Shiku IM vs RainbowChat

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Shiku IM

A secure and feature-rich instant messaging application designed for high concurrency and availability. It offers a comprehensive suite of communication tools, including text, voice, and video conferencing, with robust privacy features and private cloud support.

Highlights
  • High concurrency and availability
  • End-to-end encryption
  • Private cloud support
  • Voice and video conferencing
  • Burn after reading messages
  • Group chat up to 10,000 members
  • Shared desktop functionality
Features
Read full description

This is an original instant messaging software with stable performance and features. 1. high concurrency: the measured concurrent number is above 20W, and it supports hundreds of millions of users. 2. high availability: the server does not need to restart for half a year, automatic load balancing. 3. function: mainstream IM has all the functions, and we still have none. 4. private cloud: support for privatization and deep customization, not subject to people. 5. high security: communication protocol adopts high intensity encryption algorithm, and chat records do not leak. 6. Support appointment meeting, voice conference, video conference, shared desktop, text chat in the meeting, member management, etc The specific functions are: 1. address book, supporting friend validation or non verification, two-dimensional code, label grouping, pulling black, my colleagues, public numbers, multiple entry, my phone sending messages to my computer, etc. 2. single chat, support message receipt, burn after reading, display read, message free, top, withdraw, video chat, search chat records, etc. 3. group chat, support bulletin, @ group members, group members, group validation, group nicknames, group management, number of readers, video conferencing, etc., to support 10000 people. 4. message, support long text, pictures, recording, video, business card, location, animation, archives, red packets, screenshots and other types. 5. Privacy, exclusive ownership of features such as delivery, read, burn after reading, end-to-end encryption, private groups, private group members, etc

About

RainbowChat

Features
Read full description

RainbowChat为自主知识产权的产品级即时通讯工程,可方便打算基于MobileIMSDK开发全功能IM的开发者,能站在既有的成果上直接2次开发,从而快速掌握自主开发全功能IM的能力、加快项目进度、同时降低项目开发的不可控风险。

Screenshots

Shiku IM3 screens
RainbowChat4 screens

Verdict

The call

The clearest difference is update cadence: Shiku IM at every 3 weeks against RainbowChat's every 2 months. On price, ads, in-app purchases and device support 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Shiku IM ships an update every 3 weeks, RainbowChat every 2 months. The most recent releases landed on August 9, 2026 and September 14, 2026 respectively.

Scorecard1 real difference · 8 level
Shiku IM versus RainbowChat: the parameters behind the verdict, then further details
ParameterShiku IMRainbowChat
PriceFreeFree
Rating5.0 (1 ratings) — better
Number of ratings1 — better
Update frequencyEvery 3 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size176 MB33 MB
Age rating17+17+
DeveloperShenzhen Shiku information technology co., LTD顺 江

In-app purchases

None

Shiku IM

No in-app purchases

None

RainbowChat

No in-app purchases

Questions

Is Shiku IM free?
Shiku IM is free to download, with no in-app purchases.
Is RainbowChat free?
RainbowChat is free to download, with no in-app purchases.
Do Shiku IM or RainbowChat have ads?
Neither Shiku IM nor RainbowChat shows ads.
Which is updated more often, Shiku IM or RainbowChat?
Shiku IM ships an update every 3 weeks, and RainbowChat every 2 months. Most recently, Shiku IM was updated on August 9, 2026 and RainbowChat on September 14, 2026.

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