
A/B Subject Tests
Two subject lines, one real answer. duqky sends both lines as separate campaigns to your full list, so everyone gets each version, then compares open rates after a day or two and reports which subject got more people to open.
500 free credits ยท no credit card ยท runs in chat or on a schedule
What this skill does for you
Ask for it in chat, or let an agent run it on a schedule.
Two real campaigns
Sends the same email body twice, once with subject A, once with subject B, both to your full list. Two live campaigns, not a hunch about which line sounds better.
Open-rate winner
Waits 24-72 hours for opens to settle, then compares the open rate of each campaign and reports the subject line that more people opened.
You get the full picture
Reports the winning subject with both campaign IDs and the time the result was evaluated, so you can see the numbers, not just the verdict.
Your own platform
Runs through the email tool you already use, Mailchimp, SendGrid, or HubSpot. Your list, your sender, your account.
The winning subject line, reported with both campaign IDs and the time the result was evaluated.
Under the feathers
What actually happens when this skill runs.
- 1Give it the two lines
You name the test, pick your email platform, and hand it subject A and subject B. The email body is the same for both, only the subject changes, so the test measures the subject and nothing else.
- 2Send both to your list
It sends two separate campaigns to your full list, one with subject A, one with subject B. Everyone on the list receives both emails, so each subject line gets a real send. It confirms this with you before anything goes out.
- 3Wait for opens to settle
It waits 24 to 72 hours (24 by default) while open data comes in. Open rates need a day or two to be meaningful, so it holds off on calling it early.
- 4Compare and report the winner
It compares the open rate of each campaign, picks the subject line that more people opened, and reports it back with both campaign IDs and the time the result was evaluated.
One message. Done.
What asking for this skill actually looks like.
Questions, answered
What founders ask before trying a/b subject tests.
By open rate. It sends both subject lines as separate campaigns to your full list, waits for the opens to come in, then compares the two and reports the subject line that more people opened.

Try a/b subject tests on your site.
500 credits free. No card. Point duqky at your site and watch it work.