§ BBlog
Notes on billing, written by engineers.
How usage based pricing works in practice: meters, ledgers, migrations and the edge cases that show up at scale.
Engineering7 min read
Designing a meter: what to count, and what to leave out
A good meter maps to the value a customer feels, survives retries and is boring to audit. Here is the checklist we use with every new customer.
Lena BrandtFounding Engineer
All posts
- 02 / October 2, 2026Price changes without surprisesRaising prices is not the hard part. Knowing exactly who pays more, by how much, before anyone gets an invoice is. Here is how versioned plans make that routine.Product, 6 min read
- 03 / September 11, 2026Idempotency at a million events a secondRetries are free for the sender and expensive for the ledger. A look at how we drop duplicates without slowing down ingest.Engineering, 9 min read