A new partnership means that Truecaller’s AI Assistant can use Microsoft Azure AI Speech technology to enable Truecaller to answer your phone (via the Truecaller app) using an authentic AI version of your voice. 


Truecaller is a mobile app, available on iOS and Android, that offers caller identification, call blocking, and spam filtering services. It also provides features like call recording, chat, and contact management. Truecaller is based in Stockholm and was founded in 2009 and is now believed to have over 383 million users globally. 

Microsoft’s Speech Technology – Answers In Your Voice 

The Microsoft Azure AI Speech technology (that as part of the new partnership enables Truecaller to answer the phone using an AI version of the user’s voice) is Microsoft’s ‘Personal Voice’. Launched in November 2023 and updating the existing ‘Custom neural voice’, the new ‘Personal Voice’ feature means that paid users of Truecaller’s Assistant (AI) “can get AI replicating their voice in a few seconds by providing a 1-minute speech sample as the audio prompt, and then use it to generate speech in any of the 100 languages supported”. 

Integrated With The Truecaller Assistant – How It Works 

Microsoft describes how ‘Personal Voice’ works when integrated with Truecaller’s Assistant, saying: “The Truecaller Assistant answers users’ calls and asks questions for the users, detecting spam and letting the users know if the call is worth answering.” 

Truecaller’s Product Director & General Manager, Raphael Mimoun, explains that “The personal voice feature allows our users to use their own voice, enabling the digital assistant to sound just like them when handling incoming calls.” 


Truecaller says being able to use an AI version of the user’s voice “adds a touch of familiarity and comfort for the user”, and Microsoft says it “provides a fully personalised voice experience” and it will “will revolutionise the way our users manage their calls and elevate their overall experience with Truecaller Assistant”. 


It’s been reported that although Truecaller’s Assistant usually gives the option to edit the introductory greeting template for callers, this option will be restricted if users opt for their personal voice instead of a system-generated one. That said, it’s understood that follow-up responses can be customised, based on user preferences. 

Introduced in China Too 

Microsoft’s Personal Voice feature was developed with Haier, a leading IoT Smart Living brand in China, and the new Personal Voice feature has now been added to Haier’s service so that its users can create AI versions of their family’s voices to control and use home appliances via intelligent speakers. 

Truecaller – More In Future 

Truecaller has indicated that it intends to work with Microsoft in future to enhance its products with AI. For example, Truecaller’s Raphael Mimoun said: “We look forward to further exploring the potential of AI-powered voice technologies in partnership with Microsoft and delivering even more innovative solutions to our global user base.”   

What Does This Mean For Your Business? 

The collaboration between Truecaller and Microsoft to integrate Azure AI Speech technology into Truecaller’s app can be seen as a significant advancement in AI-driven customer interaction tools. For Truecaller, this partnership enhances its service offering by leveraging cutting-edge AI to create a more personalised and seamless experience for users. The ability to replicate a user’s voice with AI not only adds a unique touch of familiarity but also sets Truecaller apart from its competitors in the call management and spam detection market. This innovation also aligns with Truecaller’s commitment towards continually improving its user experience and expanding its global reach. 

For Microsoft, this partnership underscores the versatility and power of its Azure AI Speech technology. By enabling Truecaller to offer AI-generated voice capabilities, Microsoft showcases its ability to provide scalable, advanced AI solutions that can be integrated into various applications. This collaboration not only strengthens Microsoft’s position in the AI market but also opens up new avenues for the deployment of its technology across different industries and usage cases. 

For businesses using Truecaller, the integration of AI-generated personal voices could transform how they manage incoming calls. For example, this technology allows for a more efficient and personalised customer interaction, potentially reducing the burden on customer service teams and improving the overall customer experience. By ensuring that calls are answered in a familiar voice, businesses can also maintain a personal touch, even when calls are handled by an AI. Also, the continued partnership between Truecaller and Microsoft hints at the possibility of even more sophisticated AI-driven features in the future, which could further streamline communication processes and enhance business operations. 

Looking ahead, the potential for further AI integrations is vast. Businesses might see developments such as AI-driven analytics providing deeper insights into call patterns and customer behaviour, or enhanced automation features that could seamlessly integrate with other business systems. The ongoing advancements in AI technology promise to bring about more intelligent and adaptive solutions, helping businesses stay ahead in an increasingly competitive landscape. As Truecaller and Microsoft continue to innovate, businesses can look forward to leveraging these technologies to enhance efficiency, improve customer engagement, and drive growth.

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