The challenge
An email marketing agency writes campaign copy for 30 client brands, each with its own Trello board, brand rules and Klaviyo account. Every email meant moving details between tools by hand.
What we built
- A trigger on every Trello card: tick “Create copy” and the automation reads the brief, format, send date and discount code.
- Claude writes the copy with that brand’s own rules and voice file, so every client sounds like themselves.
- A review loop in Slack: the copywriter asks for changes in plain language and Claude revises with the whole conversation in mind. A ✅ reaction approves it.
- On approval, the copy lands in a formatted Google Doc in the client’s folder, subject lines and preview text are posted to the card, and the card moves to “Copy completed”.
The result
A campaign’s copy costs about 3 cents in AI usage, and the whole agency’s monthly AI bill is around $13.
Tools used
TrelloZapierClaude AIGoogle DocsSlackKlaviyo