Most tools watch a table for new rows (Zapier, n8n) or sync columns (reverse ETL). Rowfire fires on any SQL query you write: joins, aggregates, even what didn't happen, like "trial ends in 3 days, never activated". What stands out: "once per customer per week" is a setting, not code; every rule is backtested against history and run in shadow mode before it sends; and it's read-only and open source. Postgres/MySQL to Slack, Zendesk, Braze or any API, with no engineering ticket.
