The co-founders of Swedish caller identification app Truecaller are stepping back from day-to-day operations, marking the end of an era for one of Swedens most successful consumer technology companies.Alan Mamedi and Nami Zarringhalam (pictured above), who co-founded Truecaller in 2009, will hand over control in January to Rishit Jhunjhunwala, the companys product chief and head of its crucial Indian business. Both founders will remain with the company as strategic advisors and board members.Were approaching half-a-billion users, and I am convinced we can reach one billion users within a few years, said Mamedi in his final quarterly statement as chief executive. We are one of the very few companies globally whose product has managed to attract hundreds of millions of people. By doing that, we have put Sweden on the world map, [and] that accomplishment is something my co-founder Nami and I are incredibly proud of.Jhunjhunwala, who joined in 2015 and holds a Swedish passport, inherits a company whose stock is rebounding after a tough few years. The companys shares lost value steadily following its IPO in 2021, and last year fell more than 32% overnight after the firm reported a 20% decline in quarterly advertising revenues, mostly due to a contracting advertising market. The stock has recovered well since then, however, nearly doubling in value, and Truecaller on Wednesday said its third-quarter revenues rose 15% to SEK 457.3 million ($42.3 million). More significantly, advertising revenue increased 8% in the third quarter after several quarters of decline alleviating concerns about its crucial ad revenue stream. The company also showed promising growth in strategic markets like Colombia and Nigeria, where user numbers jumped 40% year-over-year. Subscription revenues in the U.S. rose more than 60% as the company focused on converting users to paying customers.JPMorgan analysts have noted that new market entries and emerging revenue streams could drive further upside for the stock.Truecaller dominates caller identification in emerging markets, but has found it difficult to penetrate developed economies. And while iPhone users represent just 7% of the companys user base, they generate 40% of its subscription revenue a disparity that highlights both the challenges and opportunities ahead.Recognizing that opportunity, the company plans to launch what its executives are calling its largest product improvement ever for iOS this quarter in an effort to match some of the apps capabilities on Android. Having worked closely with Alan and Nami since 2015, I know these are big shoes to fill, said Jhunjhunwala, who has overseen product development and the companys two largest revenue streams.Jhunjhunwala will have to navigate a hopeful but challenging market. The company faces regulatory scrutiny in India, where it generates over 70% of its revenues. Recent reports suggested that telecom operator Airtels new spam-blocking tool could threaten Trucallers dominance, though early reviews of the telcos offering favor Truecaller.We have a fantastic management team in whom we have immense trust, said Mamedi and Zarringhalam in a joint statement. With these pieces in place, we are convinced that the company is well positioned for future success.