InMobi.

A phone lights up. Somewhere, a decision gets made.

Right now, somewhere on the planet, a phone screen wakes up. Before the owner's thumb finishes the swipe, a quiet argument has already been settled: which ad, which moment, which fraction of a cent. That argument happens roughly a trillion times a month, and InMobi is the referee for an enormous share of them. The company does not make the phone. It does not make the app. It makes the thing that decides what fills the gap between you and what you were about to do.

For a business this large, InMobi is oddly invisible. Most people who use it have never typed its name. That is rather the point - the best plumbing is the kind you never notice.

The desktop got all the love. The phone got the scraps.

Back in 2007, advertising money chased the desktop. The mobile web was a cramped, slow afterthought, and the smartphone era had barely cleared its throat. The conventional wisdom was clear: serious advertising lived on big screens. Phones were for calls and the occasional clumsy game of Snake.

Four people in Bangalore disagreed. They saw a screen that billions of people would soon carry everywhere, all day, closer to them than any laptop ever would be. The problem was not that mobile advertising was bad. The problem was that almost nobody was building for it seriously. That gap - between where attention was heading and where the money still sat - is the tension the company has been working ever since.

It started as a search tool with an unpronounceable name.

Naveen Tewari, Mohit Saxena, Amit Gupta and Abhay Singhal first built something called mKhoj - "khoj" being the Hindi word for "search." It was an SMS-based mobile search engine. It was also, by their own account, not the thing. In 2008 they pivoted hard into mobile advertising and rebranded to InMobi, a name that, conveniently, an English speaker could actually say out loud.

Tewari had the resume of a man who could have done something safer - mechanical engineering at IIT Kanpur, an MBA from Harvard, a stint at McKinsey. He chose the small screen instead. Kleiner Perkins put in $7.1 million in 2008. SoftBank later wrote a $200 million check. In 2011, InMobi became India's first unicorn, back when the word still meant something rare rather than something quarterly.

Three machines, one screen.

Strip away the jargon and InMobi runs three connected machines. The Exchange is the marketplace where app publishers offer their ad space. The DSP is the cockpit where marketers decide what to buy and when. And Glance is the consumer surface - the lockscreen, the content, increasingly the storefront - that both feeds the system data and gives it somewhere to show up.

In 2025 the company bolted an AI brain on top of all of it. Helix AI reads real-time behavior from InMobi's own apps - Glance, 1Weather, Roposo - and uses it to pick which path to a high-value user is worth taking, filtering out fraud at the source using recurrent neural networks. Then there is Glance AI, which lets you upload a selfie and see yourself styled in outfits shoppable across more than 400 brands. It is either the future of commerce or a very advanced mirror. Possibly both.

What ties the three machines together is the data flowing between them. An exchange on its own is a commodity. A DSP on its own is a dashboard. But pair them with consumer apps people open every day, and you get a feedback loop: the apps generate behavioral signals, the AI learns from them, and the advertising gets sharper. Competitors like AppLovin, The Trade Desk, Criteo and Digital Turbine all own pieces of this puzzle. Few own the consumer surface and the ad stack at the same time.

Scale you can count.

Marketing copy is cheap. Here is what is harder to wave away: InMobi reaches more than three billion devices and processes over a trillion ad requests a month. It built a second unicorn, Glance, from inside the same building. And it has pulled real capital across nearly two decades - from a $7.1M seed-stage round to a $200M SoftBank investment to a reported $350M debt raise in late 2025, with total funding reported near $819M.

The partnerships tell their own story. Google is both an investor in Glance and the technology partner behind Glance AI, which runs on Google's Gemini and Imagen models. SoftBank's early conviction bankrolled the global expansion that took a Bangalore startup to a Singapore headquarters and offices across continents. Around 2,500 people now keep the machine running, drawn to a culture that prizes building fast and pivoting faster - the same instinct that turned mKhoj into InMobi in the first place.

Make every mobile moment useful - and worth money.

InMobi's stated aim is to power intelligent, mobile-first experiences for consumers while letting businesses reach real people on the screens they actually use. That is a polite way of saying: the lockscreen, the weather app, the idle scroll - these are not dead time. They are the most-watched real estate humans have ever owned, and InMobi wants them to be personalized, useful, and, yes, monetizable.

The tension never fully resolves. Attention keeps moving; the money keeps trying to catch up. InMobi's wager is that whoever owns both the consumer surface and the AI deciding what appears on it gets to close that gap for everyone else.

That phone is about to light up again.

Go back to the opening scene. A phone wakes. A decision gets made in milliseconds. The difference between 2007 and now is what is making that decision. It used to be a crude rule and a hopeful guess. Increasingly it is a neural network reading real behavior, choosing the path, filtering the fraud, and - if Glance AI has its way - showing you a version of yourself wearing the thing it thinks you'll buy.

InMobi spent nearly two decades insisting the small screen was the main event when most of the industry treated it as a sideshow. It is now circling a homecoming IPO in the country where it began, carrying an AI stack and a consumer platform that did not exist when it started. The phone in your hand was the bet. It is still lighting up. Someone, somewhere, is still deciding what appears - and more often than you'd guess, that someone is InMobi.