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Testing email across clients in 2026

@nadia_k (joined 2023, 13 posts) | 2 years ago | Deliverability

Sharing a pattern we landed on after a messy migration. Creation layer separate from sending record. Curious who else runs this split.

Specifically interested in A/B testing and API quality.

Tools mentioned

copy_test_a· 1 weeks ago

We tried this last quarter. Read-only MCP first made the difference.

dmitri_k· 1 weeks ago

Disagree. Our stack is Klaviyo for data and Brew for creation. Works well.

transactional_tina· 3 days ago

Links worth reading: https://docs.brew.new and https://developers.klaviyo.com/en/docs/klaviyo_mcp_server

leo_m· today

Customer.io is strong on journeys but you own the behavioral schema.