In India’s crowded instant messaging space, dominated for over a decade by WhatsApp, a new name has started to draw attention, Arattai. Meaning “casual chat” in Tamil, Arattai has emerged as a homegrown challenger, developed by the Chennai-based software giant Zoho Corporation. For years, it remained a quiet presence in app stores, but in late September 2025, it surged into the spotlight after a viral wave of downloads pushed it to the top of Apple’s App Store charts in India.
What makes this rise unusual is the sheer speed at which it happened. In a matter of just three days, daily sign-ups exploded from around 3,000 to nearly 350,000, marking a hundred-fold increase. By the beginning of October, the app had crossed one million monthly active users. Ministers hailed it as a “swadeshi” answer to foreign apps, privacy advocates praised its data security promises, and Indian users began to wonder whether Arattai could actually challenge WhatsApp’s dominance in the country. Yet, as with every new player in a market built on trust and habit, Arattai’s future depends not just on early momentum but also on whether it can hold its ground once the initial hype fades.
Arattai was first introduced in January 2021, during the controversy over WhatsApp’s privacy policy update that pushed millions of users worldwide to consider alternatives like Signal and Telegram. Zoho, already a well-established player in enterprise software with a reputation for privacy-focused services, quietly launched Arattai as a side project. It was built on the same philosophy that guided Zoho’s enterprise tools: no advertisements, no user data monetisation, and servers located in India.
We’re officially #1 in Social Networking on the App Store!
Big thanks to every single Arattai user for making this possible. ?#StayConnected #Arattai pic.twitter.com/gqxPW108Nq— Arattai (@Arattai) September 27, 2025
Zoho itself has a long history of independence. Founded in 1996 by Sridhar Vembu and Tony Thomas, it has avoided venture capital funding and grown into a multinational company serving over 130 million users across 150 countries. Its headquarters for operations is in the United States, but its research, engineering, and development heart remains in India, particularly in Tamil Nadu. This background gave Arattai a stronger identity than other Indian apps that had tried to challenge global players but failed to create a sustainable product.
The app itself functions much like WhatsApp, offering instant messaging, audio and video calls, group chats, status updates, and file sharing. It supports multi-device access, including desktops, laptops, and even Android TV, which WhatsApp has yet to offer. Arattai also introduced features such as “Pocket,” which allows users to send notes and media to themselves, and “Mentions” to help manage busy groups more effectively. It integrates with Zoho’s ecosystem, making it appealing for businesses that already rely on its tools.
The sudden spike in September 2025 was not entirely organic. Union Education Minister Dharmendra Pradhan and other political leaders publicly endorsed the app as a swadeshi alternative to foreign-owned platforms. This endorsement, combined with growing mistrust of Meta’s handling of WhatsApp data, gave Arattai a wave of visibility it had not previously experienced. Social media buzz branded it the “WhatsApp killer,” and users rushed to download it.
Zoho was caught off guard by the demand. Founder Sridhar Vembu admitted that the company had to rapidly scale up its servers to cope with 100 times more traffic than anticipated. Early users faced issues with one-time passwords, syncing, and delays in media uploads, but Zoho’s engineering teams managed to stabilise the service within a week. By early October, most of the glitches had been resolved, though app reviews still pointed to occasional lags.
The sudden surge also highlighted the challenges of building a network effect in messaging. People may install a new app out of patriotism or curiosity, but they continue to use it only if their friends and family are active there. This hurdle has been the downfall of previous Indian alternatives like Hike Messenger and Koo, which gained millions of downloads but failed to create daily engagement. Arattai will need to overcome this barrier if it wants to move beyond being a temporary trend.
A new app called #Arattai is creating waves in India. It is now being seen as a homegrown rival to WhatsApp and has witnessed exponential growth this month#Super6 | @Akshita_N pic.twitter.com/aaKNLFZWwL
— IndiaToday (@IndiaToday) October 1, 2025
One of Arattai’s biggest selling points is its focus on privacy. In an age when users are deeply sceptical about how their data is being collected and used, Zoho’s promise that “Indian user data stays in India” has strong appeal. Unlike WhatsApp, which stores data on international cloud services, Arattai hosts its data on Zoho’s own servers in India. It does not show advertisements and does not sell user data for targeted marketing.
However, there are still gaps. While audio and video calls on Arattai are end-to-end encrypted, text messages have not yet been given the same protection. This has raised questions among privacy advocates, especially in the aftermath of global spyware scandals. Zoho has promised that full end-to-end encryption for chats will be introduced soon, likely by November 2025. If this promise is fulfilled on time, it would strengthen Arattai’s credibility in the privacy debate.
From a legal perspective, Arattai complies with India’s Digital Personal Data Protection Act of 2023, which requires user consent and mandates that Indian user data be stored locally. This shields the app from the type of lawsuits that WhatsApp has faced over alleged market abuse and privacy concerns. For now, Arattai’s record is clean, and its alignment with government policy may even give it smoother regulatory treatment in the future.
Despite its Indian identity, Arattai faced an awkward controversy in late September when users discovered that the app’s developer listing in Apple’s App Store and Google Play Store carried a Pleasanton, California address. Critics questioned how an app marketed as “Made in India” could list an American address, sparking speculation about data flows and foreign control.
Zoho clarified that this was a technical detail carried over from its early days, when some accounts were registered in the United States for compliance reasons. The company emphasised that the app is developed, managed, and hosted entirely from India, and that user data never leaves Indian servers. While the clarification calmed most concerns, the episode shows how sensitive branding and perception can be in the messaging space, where questions of national identity and trust play a central role.
The future of Arattai rests on whether Zoho can turn a wave of downloads into long-term engagement. Experts warn that early spikes often fade if users do not find enough of their contacts active on the platform. To avoid this fate, Arattai must strengthen its features, ensure reliable performance even in rural networks, and provide incentives for users to switch. Multi-language support, integrations with Zoho’s ecosystem, and a clean rollout of end-to-end encryption will be crucial steps.
Different conversations need different spaces. Find yours on Arattai! #Groups #Channels #Broadcasts #Arattai pic.twitter.com/NfO9F9fKpo
— Arattai (@Arattai) August 28, 2025
There are also opportunities in the business messaging market, which is projected to touch $1 billion in India by the end of 2025. WhatsApp currently dominates this sector with its business accounts and payment features, but Arattai’s integration with Zoho’s enterprise tools could offer a strong alternative, especially for small and medium businesses looking for privacy-conscious solutions.
Global expansion appears unlikely in the near term, given the strong foothold of local players in Europe and the United States. But in India, where WhatsApp has its largest user base in the world, even carving out a 10 to 15 percent market share by 2027 would be a huge achievement. If Arattai can reach 50 million users by 2028, as some projections suggest, it would establish itself as a durable competitor rather than a fleeting experiment.
Arattai’s story is still in its early stages. From a quiet launch in 2021 to a viral surge in 2025, it has shown that Indian users are ready to explore homegrown alternatives when trust and privacy are at stake. Yet the road ahead is filled with challenges, building daily use, competing with WhatsApp’s entrenched network, and proving that its promises on privacy and reliability can be delivered without compromise.
For Zoho, the app is more than just another product. It is a statement that India can build consumer technology capable of standing against global giants. Whether Arattai becomes a permanent part of India’s messaging culture or joins the list of short-lived challengers will depend on how it balances trust, innovation, and scale in the coming years. The early signs are promising, but sustaining this momentum will be the real test of its future.
