BlackRock BUIDL vs iShares Bitcoin Trust (IBIT)

BlackRock BUIDL (tokenized-treasury) and iShares Bitcoin Trust (IBIT) (ETF and fund) serve different corners of the Bitcoin ecosystem, but the question that matters most is the same: who controls the keys? The scores are close — BlackRock BUIDL at 80/100 (B+) and iShares Bitcoin Trust (IBIT) at 77/100 (B+). When the gap is this narrow, the details matter: custody model, single points of failure, and the fine print on fees.

Where Each Platform Wins

Custody and security — the most heavily weighted category in our methodology at 35% — tilts 13 points toward BlackRock BUIDL (88 vs. 75). BlackRock BUIDL eliminates single points of failure in its custody architecture, while iShares Bitcoin Trust (IBIT) relies on a model where one compromised entity could put your bitcoin at risk. On fees, iShares Bitcoin Trust (IBIT) wins by 8 points. iShares Bitcoin Trust (IBIT) charges 0.25% expense ratio compared to 0.50% management fee at BlackRock BUIDL. Over a multi-year holding period, fee differences compound — a point worth considering for long-term accumulators. BlackRock BUIDL's strongest advantage is in features (78 vs. 55), where BlackRock BUIDL's product breadth and tooling makes a measurable difference. iShares Bitcoin Trust (IBIT) stands out on ease of use (90 vs. 65), reflecting iShares Bitcoin Trust (IBIT)'s user experience and onboarding flow.

The Custody Question

Here's the key difference: BlackRock BUIDL has no single point of failure (Multi-Institution (BNY Mellon + Securitize)), while iShares Bitcoin Trust (IBIT) does (ETF — Coinbase Custody). This matters because a single-point-of-failure model means one compromised entity — whether through a hack, insolvency, or government action — could result in total loss of funds. History has proven this risk is not theoretical. FTX, Celsius, and BlockFi all represented single points of failure for their users.

Bottom Line

BlackRock BUIDL edges out iShares Bitcoin Trust (IBIT) by 3 points. It's a close call, and the right choice depends on your specific situation — how much bitcoin you're holding, how often you need access, and whether you prioritize largest tokenized treasury fund ($2.5b+). blackrock as asset manager, securitize as tokenization agent, bny mellon as custodian. daily nav. multi-chain deployment across 7 networks. over largest spot bitcoin etf by aum. blackrock brand. deep liquidity.. Keep in mind these platforms target different audiences — BlackRock BUIDL is built for accredited investors & institutions, while iShares Bitcoin Trust (IBIT) serves tradfi investors. One thing to watch with iShares Bitcoin Trust (IBIT): single custodian (coinbase). no direct btc withdrawal. counterparty risk via shares..