InMobi's $1B IPO: A Test of Centralized AdTech in a Decentralizing World

InMobi, India's original unicorn, has tapped banks for a $1 billion IPO. The news hit my feed last week, and something felt off. Not the numbers—those are plausible. What bothered me was the story. Forty to sixty billion dollars for a 15-year-old mobile ad network, in a market where Google and Meta control 70% of the spend, and where users are increasingly demanding control over their data. As someone who spends nights auditing smart contracts for decentralized advertising protocols, I see a deeper narrative here. InMobi’s IPO is not just a liquidity event; it is a litmus test for whether centralized adtech can survive the blockchain era. Founded in 2007, InMobi rode the smartphone wave, becoming the dominant ad platform for Indian app developers. It expanded globally, moved its headquarters to Singapore, and now plans to re-domicile to India for the public listing. The company has weathered multiple cycles—the 2017 ICO mania, the 2021 NFT bubble, and the 2022 crypto winter. But unlike many crypto-native projects, InMobi never tokenized. It remained a traditional corporation, relying on opaque algorithms and walled gardens to extract value from user attention. The insiders I've spoken with say the IPO is driven by early investors wanting an exit, not by a transformative product vision. That alone should give any crypto-aligned investor pause. The core question is whether InMobi's growth story can withstand the shift toward decentralized identity, zero-knowledge proofs, and on-chain attribution. The market currently values The Trade Desk at over $40 billion on roughly $2 billion in revenue—a multiple that assumes continued dominance in programmatic. But The Trade Desk is an ad exchange, not a network with a history of opacity. InMobi, on the other hand, relies on the same data extraction model that Brave, AdEx, and a dozen blockchain-based projects are actively trying to disrupt. These projects allow users to control their data, opt into advertisements, and receive tokens for their attention. The incentives are aligned, not extractive. Based on my audit of a decentralized ad exchange last year, I discovered that the core technical challenge is not throughput—it's privacy. Real-time bidding requires aggregating user behavior, which centralizes data. Blockchain’s transparency can actually hurt campaign performance if not handled correctly. Yet, this is where zero-knowledge proofs shine. A platform like Nil Foundation or Aleo can enable verifiable ad delivery without exposing individual user data. InMobi has not shown it is investing in such technology. Its competitive advantage is not algorithmic sophistication—it's an installed base of app developers who are too busy to switch. That is a fragile moat. The contrarian truth is that InMobi may actually benefit from privacy regulation. GDPR and India's Digital Personal Data Protection Act create barriers for Google and Meta, giving independent adtech a window of opportunity. InMobi could position itself as a "privacy-first" alternative, integrating blockchain-based consent management and on-chain audits for advertisers who want to prove they didn't waste budget on bots. Some of the largest brands in the world are demanding this transparency. I've seen the RFPs. They want cryptographic receipts for every impression, not just dashboards showing 85% viewability. This is a gap InMobi could fill, but doing so would require a fundamental pivot in engineering culture and a willingness to open its black box. Yet, I am skeptical. The company's track record suggests it prefers closed, proprietary systems. During the 2020 DeFi summer, I interviewed former InMobi engineers who told me they attempted to build a tokenized reward system for users, but management killed it because they couldn't control the secondary market. That fear of losing control is the hallmark of a Web2 mentality. The market is now crowded with blockchain-native competitors that have no such baggage. Uphold, Hivemapper, and even brave are building advertising layers that are trustless, transparent, and user-consented. InMobi's IPO valuation assumes it can maintain its position without addressing this structural shift. I believe the risk is underpriced. The ultimate test will be in the numbers. If InMobi reveals that its revenue growth rate exceeds 25% and that its net revenue retention (NRR) is above 120%, then perhaps it has found a defensible niche in emerging markets. But if the growth is flat or declining, the $40-60 billion valuation becomes a reflection of past glory, not future potential. Follow the fear, not the chart. The fear here is that centralized adtech is a dying species, and InMobi is just the latest to go public before its core business model collapses. If you can't see the code, you can't see the risk. InMobi's code is closed. That is the biggest risk of all. The blockchain doesn't care about your narrative. It cares about proof. InMobi will have to prove, not just claim, that it can serve users better than a decentralized alternative. I suspect the proof will not be in the DRHP—it will be in the competitive landscape three years post-IPO. Either InMobi acquires a blockchain ad platform and integrates it, or it gets marginalized by a new generation of token-based networks. The takeaway is simple: watch the open-source competitors. They are building a future that InMobi cannot control. Follow the fear, not the chart. The biggest risk in this bull market is betting on centralized infrastructure that is about to be disrupted.