Last month at a Layer 2 meetup in Barcelona, I watched something interesting happen. When the speaker asked which L2 everyone was building on, the room split almost perfectly: half said Base, half said Arbitrum. One person mentioned Optimism. Not a single hand went up for any of the 50+ other rollups.
At my stealth startup, we just went through our L2 selection process. It took us about 15 minutes. Base or Arbitrum? We flipped a coin. (We went with Arbitrum.) The point is—the decision space has collapsed. And the data backs this up in a way that’s honestly kind of stunning.
The Consolidation Numbers
Base and Arbitrum now control 77% of Layer 2 DeFi TVL. Let me break that down:
- Base: 46.58% of L2 DeFi TVL
- Arbitrum: 30.86% of L2 DeFi TVL
- Optimism: ~6% of L2 DeFi TVL
Combined, the top three hold 83% market dominance. Even more telling: these three networks process nearly 90% of all Layer 2 transactions. This isn’t just about where money sits—it’s about where actual activity happens.
For context, over 50 rollups are competing in this space. That means 47+ rollups are fighting over the remaining 17% of TVL and 10% of activity. The power-law distribution here is extreme.
What Happened to Everyone Else?
Remember Blast? In June 2024, they had $2.2 billion in TVL. By December 2025, that number was $55 million—a 97% collapse. Blast isn’t alone. Most L2s launched in 2025 followed a predictable pattern:
- Big airdrop announcement
- TVL spike as farmers arrived
- Airdrop executed
- Everyone left
- Ghost town
I’ve started calling these “airdrop zombies.” They technically still exist, but there’s no meaningful development, no user activity, just the faint pulse of a few validators keeping the lights on.
The enterprise rollups are a different story. Kraken launched INK, Uniswap launched UniChain, Sony launched Soneium, Robinhood integrated Arbitrum. These aren’t airdrop plays—they’re distribution plays. They have built-in user bases. But even here, notice the pattern: if you’re not bringing millions of existing users, you’re picking Base or Arbitrum, not launching your own.
Why Did These Three Win?
Here’s the uncomfortable truth: distribution beat technology.
Base didn’t win because it has the most advanced rollup architecture. It won because Coinbase put it in front of 100+ million users. Arbitrum didn’t win because of superior fraud proofs (though they’re good). It won because it launched early, captured liquidity, and built a developer community while everyone else was still in testnet.
From a technical perspective, what Base and Arbitrum offer isn’t dramatically better than a dozen other rollups. But they offer:
- Deep liquidity (the DeFi moat)
- Strong developer communities (better tooling, more tutorials, faster support)
- Network effects (your users are already there)
- Platform stability (less likely to rug or shut down)
The best technology doesn’t always win. The best-positioned technology wins.
Is This Consolidation Healthy?
I go back and forth on this.
Arguments for:
- Better interoperability between fewer chains
- Liquidity concentration improves DeFi UX
- Clearer choices for developers (decision paralysis was real)
- Easier for newcomers to know where to start
- Standards can actually emerge when there are fewer platforms
Arguments against:
- Centralization risk (what if Base makes bad governance decisions?)
- Platform power (sequencer fees could become extractive)
- Reduced innovation (smaller L2s were experimenting with cool tech)
- Single points of failure (security-wise, 77% concentration is scary)
The big question: Did Ethereum’s rollup-centric roadmap succeed or fail?
We wanted a world where L2s handled execution and L1 handled settlement/security. We got that. But we also got a duopoly. Vitalik recently said the L2 model “no longer makes sense.” Meanwhile, Ethereum’s targeting a 100M+ gas limit expansion—a 5x increase. Are we pivoting back to L1 scaling because the L2 experiment didn’t work as planned?
The Path Forward
I think we’re seeing the maturation of the L2 ecosystem, not its failure. In any market, consolidation happens. The early internet had thousands of search engines. Google won. The early smartphone era had dozens of operating systems. iOS and Android won. This is normal.
But I worry about what happens next. When a market consolidates around 2-3 players, those players gain pricing power. Right now, Base and Arbitrum compete on user experience and fees. What happens in two years when they don’t need to compete anymore? What happens when they realize they can extract rent?
The smaller L2s that survive will need to be hyper-specialized. Maybe you’re the gaming L2. Maybe you’re the privacy L2. Maybe you’re the emerging markets L2. Generic “faster, cheaper Ethereum” isn’t enough anymore. You need a reason to exist beyond just being another rollup.
What Do You Think?
Is this consolidation final, or just a phase?
Could a new L2 realistically challenge Base/Arbitrum at this point, or is the game over?
What should smaller L2 teams do—shut down gracefully, find a niche, or keep grinding in hopes of a breakthrough?
And the bigger question: Is this what Ethereum’s scaling vision was supposed to look like?
I’m honestly not sure. I’d love to hear what this community thinks—especially from folks building on smaller L2s or working on interoperability solutions. Are we in a healthy equilibrium, or are we watching the centralization of Ethereum’s execution layer in real time?