Announcing Caleb Tebbe Joining as CTO and Operating Partner

We’re excited to formally welcome Caleb Tebbe as CTO and Operating Partner at Blockchain Capital. He’s been an essential member of the team since joining in September 2022 and will continue to lead technical due diligence and portfolio support. 

Caleb is as crypto-native as you can get, building at the frontier of the industry since 2013. Over the last decade, he’s repeatedly shown a rare ability to identify technical frontiers early, build where others haven’t yet arrived, and translate deep protocol work into real, scaled systems. His career spans some of the most formative chapters of crypto’s infrastructure layer. Caleb was one of the first external data science hires at Coinbase during its Series B, applying graduate research in big data to an exchange that was still defining what crypto infrastructure could look like. He later co-founded RADAR, one of the earliest decentralized exchanges on Ethereum, pioneering auction-based order books and on-chain settlement before “DeFi” existed as a category. RADAR was ultimately acquired through BCAP’s network.

Caleb has also operated crypto infrastructure at industrial scale. As SVP of Product and Engineering at Core Scientific, then the largest Bitcoin miner in North America, he worked on mining fleet management systems and firsthand experienced the operational realities of running crypto infrastructure beyond the protocol layer. More recently, he co-founded Rio, which was acquired by EigenLayer, where he served as Director of Engineering.

Now, as the fund’s first CTO, Caleb leads technical due diligence and portfolio support at Blockchain Capital, serving as the technical voice in the investment committee. He pressure-tests feasibility not through decks or abstractions, but by pulling code, reviewing architecture, and asking the kinds of questions that reveal whether teams truly understand what they’re building. For portfolio founders, he’s a hands-on advisor on hiring, performance management, and engineering decision-making, drawing directly from his own experience taking companies from zero to acquisition.

Caleb’s perspective is shaped by a long-held conviction: the technology matters more than the intermediary. After watching Mt. Gox collapse early in his career, he drew a distinction that still guides his work today, the protocol wasn’t the failure; the operator was. That lens informs how he evaluates technical risk, founder competence, and where durable value is created in crypto.

As CTO and Venture Partner, Caleb will continue to operate across technical diligence, internal tooling, and deep support for technical founders across the portfolio. His builder’s mindset, protocol-level depth, and founder-first approach strengthen our ability to back ambitious teams tackling problems that couldn’t exist before crypto.

We’re excited to have Caleb in this role as we continue to partner with founders building the next generation of crypto infrastructure and to keep asking the hard technical questions that move the space forward.