Truecaller Faces a Double Whammy: Slowing User Growth and Advertising Headaches

Imagine one of the most popular apps on your phone, one used by over 500 million people, suddenly hitting a wall. That is exactly what is happening to Truecaller, the app many of us rely on to identify unknown callers and block spam. Despite its massive user base, especially in India, Truecaller is now seeing a significant slowdown in growth and even a decline in new downloads. This shift is alarming investors, with the company’s stock value dropping sharply since its public offering.

The core problem is twofold. Truecaller is facing increasing competition from all sides. Phone makers like Apple and Google are building similar caller identification and spam-blocking tools directly into their operating systems. At the same time, telecom companies in crucial markets like India are launching their own network-level solutions that display caller names automatically, making a third-party app seem less essential.

Adding to these competitive pressures, Truecaller recently took a big hit to its advertising business. A key advertising partner, identified by analysts as Google, abruptly reduced ad traffic by about one-third in late 2025. Since advertising makes up a significant portion of Truecaller’s revenue, this loss has created an immediate financial challenge. The company is now working to find new advertising partners and build its own ad platform to lessen its reliance on any single company.

Truecaller became a global sensation, particularly in countries like India, where it accounts for about 70 percent of its total users. The app filled a critical need in these markets, helping people navigate a constant barrage of spam and unwanted calls. It went beyond just showing who was calling; it embedded itself into daily communication as a trusted filter.

This widespread adoption turned Truecaller into a powerful platform, allowing it to introduce new features like an AI Assistant for answering calls and family protection tools. However, its very success made it a target. Now, the space it once dominated is becoming crowded with built-in phone features and network-level services that offer similar basic caller identification without needing an extra app.

So, why should you pay attention to Truecaller’s struggles? For starters, if you are one of the millions who use Truecaller, this could affect your experience. As the company focuses on new revenue streams and battles competition, the speed and scope of new feature development might change. For businesses, the landscape of identifying themselves to customers could shift significantly if network-level caller ID becomes the norm.

More broadly, Truecaller’s situation reflects a common challenge for many successful apps. When an app provides a truly useful service, that service often gets absorbed into the phone’s operating system or becomes a standard feature offered by network providers. This trend can make standalone apps struggle to maintain their original value proposition. The ongoing fight against phone spam is evolving, and it is moving beyond just third-party apps to deeper levels of our communication infrastructure.

There are also ongoing concerns about user privacy. Truecaller has faced criticism in the past regarding how it built and maintains its vast database of phone numbers, especially concerning user consent. As more players enter the caller identification space, we need to keep asking how our call data is being collected, used, and protected by these different services, whether they are apps, phone makers, or telecom providers.

Looking ahead, Truecaller is not standing still. The company is actively trying to grow its premium subscriptions, which already have over 4 million paid users. It is also expanding its business services, helping companies verify their identities and communicate with customers more effectively. They are also developing new AI features to combat increasingly sophisticated scam calls.

The big question is whether these new initiatives and diversified revenue streams can fuel enough growth to offset the slowing user acquisition and intense competition. We will have to watch whether Truecaller can continue to be an essential tool, or if caller identification will mostly shift to features already built into our phones and phone networks.

With phone makers and telecom companies building their own caller ID and spam protection, do you think apps like Truecaller will still be necessary in a few years, or will they become obsolete?

If a network-level caller ID, like India's CNAP, became common everywhere, would you still rely on a third-party app to screen your calls?

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Filed under: Truecaller, CallerID, TechNews, AppEconomy, DigitalSecurity