A/B test messaging at scale

Run message variants against live traffic, kill the losers, and roll winners out as templates.

Outcome: Messaging that measurably improves every cycle - each sequence step carries data-picked copy, and winning messages become reusable templates for the whole team.

Availability: runnable today — all 6 steps are callable now.

The optimization loop most teams never close: variants get created, but nobody reads the per-variant stats or kills the losers. For an agent this is a pure numbers job — every step of the loop is an API call available today.

Step-by-step guide: docs.reply.io/guides/manage-sequences — the canonical per-surface instructions (MCP, CLI, Skills, API) for this workflow.

Steps

Create variants on key steps
Add A/B message variants to the sequence steps that matter most — openers and first follow-ups move the numbers hardest. Uses Sequence API .
Let traffic split
Run the sequence; the platform distributes contacts across enabled variants automatically. Uses Sequence API .
Read per-variant performance
Pull per-step stats and compare open, reply, and positive-reply rates between variants. Uses Sequence API .
Disable the losers
Turn off underperforming variants mid-flight — no need to stop the sequence. Uses Sequence API .
Promote the winners
Save winning messages as email templates so every future sequence starts from proven copy. Uses Templates & Schedules API .
Verify the lift
Confirm the aggregate effect in channel reports — reply rate and positive-reply rate over time. Uses Analytics API .