RUA and RUF reports
The aggregate and forensic report addresses in a DMARC record.
RUA points mailbox providers to the address that should receive aggregate DMARC XML reports. RUF points to forensic failure reports, which many mailbox providers limit or do not send because they can expose message details. Most teams start with RUA reporting and use a DMARC monitor to parse it.
reading this as early-stage startups
At an early stage the deciding factors are what the free tier actually covers, what the first paid invoice looks like, and how much of a founding engineer's week the setup costs. Feature depth that only matters at a million sends a month is noise until it is not.
Applied to rua and ruf reports, that means weighing free tier, best published rate per 1,000, entry price, and developer experience ahead of the rest, against a waitlist, a launch announcement, onboarding email, and the first transactional sends.