Nebula (NebulaBank)

Nebula addresses a fairly new finance problem: for AI companies, the biggest expense is often machine time, spread across a long list of vendors — model providers, GPU clouds, inference APIs, eval infrastructure — and there is rarely a clean way to say which team, environment or customer generated a given dollar of usage. Nebula is built as a business account whose native dimensions are agent, model, environment and customer rather than a generic chart of accounts.

Alongside the account, Nebula offers agent accounts and card issuing. A single API call can create a virtual card bound to a policy — a monthly ceiling, a merchant allowlist, an expiry, an environment — so an autonomous agent or a contractor can spend only within limits that are enforced at the card network rather than in application code. Cards can be frozen or revoked quickly, and each charge is meant to arrive already coded to the agent, model and environment that generated it.

The third pillar is treasury: multi-currency balances, sweep rules and runway modelling based on real usage trends rather than a simple monthly average, plus 31 international payout corridors for research vendors, contractors and data partners. Nebula publishes a transparent rate card and a cost estimator, and states that transaction data is never used to train models or sold, with vendor credentials held in an isolated vault and access written to an audit log.