Campaign optimization
Email A/B testing Your best email
wins on its own.
Run an A/B test on any email campaign: send two variations to part of your audience, and tinyEmail sends the higher-performing one to everyone else — decided on open rate or click rate, delivered automatically.
- Variations
- A & B
- Min. audience
- None
- Follow-ups
- 0
Subject line test
Spring Sale campaign
Metric
Open rate
Split
25 / 25 / 50
Test group
2,491
Your spring picks are in
34%25% off everything today
21%+62%
more opens · variation A
Winner cloned and sent to the remaining 6,240 automatically
Test what actually moves the numbers
You only get one shot at the inbox.
Make it your better email.
Most campaigns go out on a hunch, and you find out how the subject line did after the whole list has already seen it. Email A/B testing — split testing — moves that answer to the front.
The whole list sees your guess
Pick the wrong subject line and every contact gets the weaker email. There's no second first impression, and no way to claw the opens back.
Testing by hand rarely happens
Splitting a list, comparing two reports, then building a follow-up campaign for the rest is a job in itself — so most teams skip it and keep guessing.
What A/B testing changes
A fraction of your audience decides for you. tinyEmail evaluates both variations, then clones and sends the winner to everyone still waiting.
How it works
How email A/B testing works in tinyEmail
Four steps inside a regular campaign. After you launch, there is nothing left to watch and nothing left to send.
Create two variations
Exactly two — A and B. Change the subject line or the content, one variable at a time, so the result points at a single change.
Split your audience
You set the distribution — say 25% to A, 25% to B, and the remaining 50% held back for whichever wins.
Choose how it's judged
Open rate or click rate decides the winner. Add an optional target percentage and the first variation to reach it wins on the spot.
The winner sends itself
tinyEmail clones the winning campaign and delivers it to the remaining audience — no follow-up for you to build.
What you control
Every rule of your A/B test is yours to set
Automatic doesn't mean opaque. You decide what's tested, who tests it, and what counts as winning.
One variable at a time
Test the subject line or the email content — never both at once, so the winner tells you exactly what worked.
What to test
You set the exposure
Full control over the split. Your audience is frozen at launch, so the groups stay consistent for the whole test.
Distribution
25 / 25 / 50
Half the audience only ever receives the better email
Winning metric, your call
Judge on open rate when you're testing subject lines, or click rate when you're testing what's inside the email.
Pick the winner by
Open rate
Best for subject lines
Click rate
Best for content
Win early on a target
Set an optional limit value. The first variation to reach that percentage wins instantly, without waiting out the duration.
Open rate target
First to 20% wins immediately
Exactly how the A/B test winner is decided
You never have to wonder why a variation won. The rules are fixed before you launch, and they run the same way every time.
-
A target is reached. That variation wins immediately. If both reach it, the higher rate takes it.
-
The duration ends first. The highest-performing variation wins, even by a fraction of a percent.
-
An exact tie. Variation A is sent, so a test never stalls without a result.
-
Then it ships. tinyEmail clones the winning campaign and sends it to the remaining audience.
Variation A
34%
Variation B
21%
Frequently asked questions
What is email A/B testing?+
Email A/B testing — also called split testing — sends two variations of the same campaign to different parts of your audience, then compares how each performed. In tinyEmail you create two variations, A and B, choose open rate or click rate as the winning metric, and the winning campaign is sent to the remaining audience automatically.
How long does an A/B test run?+
For as long as the test duration you set. If you also set a limit value, the test can finish sooner — the first variation to reach that percentage wins immediately.
What can I A/B test in a campaign?+
Either the subject line or the email content. Every test uses exactly two variations, A and B, and changes one variable — so whichever wins, you know what caused it.
How is the winner decided?+
You choose open rate or click rate as the winning metric. If you set a limit value, the first variation to reach it wins immediately — and if both reach it, the higher rate wins. If the test duration elapses first, the highest-performing variation wins, even by a fraction of a percent. An exact tie defaults to Variation A.
Do I have to send the winning campaign myself?+
No. Once a winner is decided, tinyEmail clones the winning campaign and sends it to the remaining audience automatically.
How is my audience split between variations?+
You have full control over the distribution — for example 25% to A, 25% to B and the remaining 50% reserved for the winner. The audience is frozen at launch, so the splits stay consistent for the whole test.
Is there a minimum audience size?+
No. There's no minimum audience size required to run an A/B test, so you can start with the list you already have.
Does it work with workflows and SMS?+
A/B testing is available for regular email campaigns only — not workflows or SMS.
Let your next campaign decide itself
Write two variations, choose the split and the metric, and send the winner to everyone else without lifting a finger.
Regular campaigns · No minimum audience size · Winner sent automatically
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