The archive · Consumer Apps · Product decision · 2021-2025
Arattai: Zoho's quiet messaging bet went viral as India wanted a local WhatsApp
Zoho's Arattai jumped from under 10K downloads to 7.5M in weeks as India's demand for domestic apps surged
Arattai
What the business is
Arattai (casual chat in Tamil) is Zoho's messaging and calling app: chat, voice and video calls, group chats, business tools, built for low-end phones and slow connections
Starting capital：Built inside bootstrapped Zoho on its own messaging framework — no external funding disclosed
How it started
Arattai soft-launched in 2021, built quietly by a Zoho team that worked for over five years without expecting the product to take off, per founder Sridhar Vembu. Zoho's advantage was patience and existing infrastructure: a messaging/AV framework perfected over 15 years, run across its own servers and data centers.
What happened
For most of 2025 the app stayed below 10,000 downloads. In late September a national push for self-reliance and indigenous digital alternatives suddenly made a domestic WhatsApp rival relevant. Daily signups jumped from 3,000 to 350,000 within three days, active users rose 100x, and Arattai became the most-downloaded app in India — 7.5 million downloads by October 3, 2025.
How it ended up
Live and scaling, but retention is unproven: Zoho rushed plans forward and is working on end-to-end encryption for messages, while WhatsApp keeps roughly 500M monthly users in India
Background
Arattai is Zoho's messaging app — chat, voice and video calls, group chats and business tools, built for low-end phones and slow internet. The Tamil word means 'casual chat', and the product was Zoho's quiet answer to a question few Indian startups had the patience for: could a homegrown app ever rival WhatsApp in India?
Arattai soft-launched in 2021 and stayed nearly invisible — under 10,000 downloads as of August 2025. Zoho's founder Sridhar Vembu later said his team had worked for more than five years without expecting the product to take off, funded by Zoho's bootstrapped cash flow and built on a real-time messaging and audio-video framework Zoho had perfected over 15 years for its own products.
In late September 2025 the conditions changed: a broad push for indigenous digital alternatives made a domestic WhatsApp rival suddenly relevant. Daily signups jumped from 3,000 to 350,000 in three days, active users rose 100x, and Arattai became the most-downloaded app in India. By October 3, 2025 it had passed 7.5 million downloads across the Play Store and App Store, according to Economic Times/PTI.
The open question is retention. WhatsApp still has roughly 500 million monthly users in India, and Arattai's messages are not yet end-to-end encrypted — Zoho says it pulled launch timelines forward and is racing to add encryption and infrastructure. Analysts note previous Indian challengers like Koo and ShareChat spiked and faded, making Arattai's durability the real test of Zoho's bet.
What has to be true
- Zoho could fund years of quiet development from its own bootstrapped profits, so the bet cost patience, not venture approval.
- It reused a 15-year-old messaging framework, so a consumer app was incremental on infrastructure Zoho already ran.
- The market signal was real and measurable: under 10K downloads in August to 7.5M by October 3, with signups spiking 3,000 to 350,000 a day.
- India's WhatsApp dependence was concentrated — 500M users — leaving enormous room for a credible domestic alternative to gain share.
- Being ready when sentiment shifted let Zoho capture the wave without spending on acquisition; the app rose on downloads, not ads.
What can be applied
A patient product bet pays off when the wave arrives: Zoho built Arattai for years on infrastructure it owned, so it absorbed millions of downloads in days.
Aftermath
As of October 9, 2025, Arattai is live on both app stores with 7.5M+ downloads and is the most-downloaded app in India, but its daily-active retention is undisclosed. Zoho is rushing end-to-end encryption for messages and expanding infrastructure, with CEO Mani Vembu saying the company wants users to keep control of their data while complying with Indian rules. Whether the viral spike becomes durable adoption against WhatsApp's 500M Indian users remains unproven.
Sources
- The Indian messaging app that wants to take on WhatsApp
- Arattai hits 7.5 million downloads as Zoho-backed messaging platform trends on social media, app charts
spotted an error? The archive wants to know.
Your turn
You just read one. Describe what you are building, and see who is betting on the same thing.
Free account · 3 free questions · no card