An Ethereum block builder outearned Tether and Circle for a day as MEV bot activity surged across the network
For one day, the most lucrative name in crypto was not a stablecoin giant or a buzzy exchange. It was an Ethereum block builder most users have never heard of.
Titan Builder briefly claimed the top spot on DeFiLlama’s 24-hour protocol revenue rankings with $22.83 million, pushing past Tether. That is a strange sentence to write about a company that sells no token and runs no app you can download.
A builder takes the crown
The ranking came on October 31, 2026, according to the research findings. Titan’s $22.83 million topped Tether’s $16.99 million over the same window.
Circle, the other heavyweight stablecoin issuer on the list, came in at $6.76 million. Titan’s daily haul was more than three times that figure.
The jump was not entirely out of nowhere. Titan reportedly collected approximately $24.7 million in fees during an earlier 24-hour period before October 31.
The driver behind the spike was a notable increase in MEV bot activity on Ethereum. More bots fighting over the same blocks meant more money flowing to whoever builds those blocks.
The win was temporary, though. Over longer stretches, Titan’s revenue generally does not surpass Tether’s, so this was more of a sprint victory than a marathon one.
What a block builder actually does
Think of an Ethereum block as a delivery truck with limited cargo space. Someone has to decide which packages go on board, in what order, and which ones pay extra for priority.
That someone is the block builder. Builders collect transactions, arrange them into the most profitable order possible, and then bid for the right to have their block added to the chain.
The profit hiding in that ordering is called miner extractable value, or MEV. It covers things like arbitrage between exchanges and liquidations, where bots pay up to get their transactions placed in exactly the right spot.
Under a system called proposer-builder separation, the job of building blocks is split from the job of proposing them. Validators propose blocks, while specialized builders like Titan compete to construct them through an auction.
Builders pay validators for the privilege of having their block selected. Whatever surplus remains after that payment is the builder’s revenue.
Titan describes itself as a neutral builder. It runs multiple bundle-merging algorithms across various relays, the middlemen that pass blocks between builders and validators.
It also avoids self-search, meaning it does not hunt for its own MEV opportunities. The stated goal is to sidestep conflicts of interest with the traders and bots sending it transactions.
Dominance in the block auction
Titan’s revenue spike looks less surprising when you check its market share. The builder accounted for about 52% of MEV-Boost blocks in October 2026.
MEV-Boost is the widely used software that connects Ethereum validators to outside block builders. Building more than half of those blocks puts Titan in a commanding position.
Cumulative revenue for Titan has exceeded $160 million. That is real money for an infrastructure operator that most of the market only notices when it shows up on a leaderboard.
Titan is a private entity. It has no native token and no planned public token launch, and it does not run any community governance system.
So the business model is refreshingly plain: build efficient blocks, win auctions, keep the margin. There is no airdrop campaign attached.
Why a one-day ranking matters
Stablecoin issuers earn steady revenue that tends to hold up over longer timeframes. Builders, by contrast, ride the waves of network congestion and bot competition.
For anyone tracking protocol revenue as a measure of health, that comes with a caveat. A single-day leaderboard can be skewed by short bursts of activity, and Titan’s own longer-term numbers sit below Tether’s.
The bigger question is concentration. A single builder producing roughly half of MEV-Boost blocks raises ongoing debates about market concentration in Ethereum’s block production.
There is also the issue of exclusive order flow. Some builders receive transactions directly from particular sources, which can give them an edge in the auction that rivals struggle to match.
Titan’s neutral positioning and refusal to self-search are partly an answer to those concerns. It positions itself as a pipe, not a competitor to the traders who use it.
