o2b.org
The extension changes the meaning here, which is unusual and useful. The same three characters on a commercial domain would read as B2B jargon. On the .org they read as mission.
O2B parses as organisation to beneficiary, which is the actual value chain of the entire nonprofit sector. How much of a donated pound reaches the person it was meant for is a question the sector spends enormous effort on, and a platform, standard or organisation named for that transfer states its purpose exactly. Direct-giving platforms, transparency initiatives and impact measurement bodies all fit.
Operations to board is a second reading, suiting governance tooling for nonprofits, a small but real software niche.
Three characters, X-to-Y structure, permanently scarce.
The name is available. Enquiries welcome.