A/B testing on autopilot
Add multiple A/B variants per email step. Smart optimization shifts volume to winners and auto-pauses underperformers. Configure minimum sends per variant, minimum days before optimization, and auto-pause thresholds.




Lambda Group
Campaigns
Campaign | Status | Leads | Sent | Opened | Replied | Positive | Bounced | |
|---|---|---|---|---|---|---|---|---|
SaaS VP Decision Makers | Active | 4,200 | 2,847 | 1,748(61.4%) | 236(8.3%) | 92(39.0%) | 51(1.8%) | |
Series A Founders – West Coast | Active | 1,800 | 1,204 | 784(65.1%) | 133(11.0%) | 61(45.9%) | 19(1.6%) | |
Agency Owners Outreach | Paused | 5,600 | 3,891 | 2,218(57.0%) | 214(5.5%) | 72(33.6%) | 82(2.1%) | |
Enterprise IT Directors | Completed | 7,100 | 5,102 | 3,265(64.0%) | 453(8.9%) | 176(38.8%) | 92(1.8%) | |
RevOps Teams Q1 2025 | Draft | 920 | — | — | — | — | — |
Let the data pick the winner
Create as many variants as you need per email step. Test subject lines, body copy, or both at once.
Automatic volume allocation toward winning variants. No manual intervention needed.
Variants that consistently underperform get paused automatically based on your configured thresholds.
Each step in your sequence runs its own A/B test. Optimizations at step 2 don't affect the test at step 4.
Test variants, keep what converts
Write multiple versions (A, B, C, etc.) for any step in your sequence. Test subject lines, body copy, or both.
Set the minimum sends per variant before optimization can kick in, the minimum number of days to wait, and the auto-pause threshold. You can also set a minimum variant count.
The algorithm continuously allocates more volume to better-performing variants and auto-pauses underperformers once your thresholds are met.
Test multiple subject lines on your initial sends. Once Smart optimization identifies a winner, it gets the lion's share of remaining volume.
Each step in your sequence can have its own set of variants running independently. Optimize at every touchpoint.
Try different value props, CTAs, or email lengths. Let the data decide what resonates instead of guessing.
Smart optimization, not guesswork
Smart optimization, not manual winner picking
Other tools let you set up variants but leave you to manually decide the winner. SendKit uses Smart optimization to automatically shift volume toward top performers and pause underperformers. You configure the rules, the algorithm does the rest.
Configurable optimization, not a black box
You control when optimization kicks in. Set the minimum sends per variant, the minimum days to run before pausing anything, and the auto-pause threshold. Want to keep more variants alive longer? Raise the minimum variant count. Smart optimization handles the math.
Got questions? We've got answers.
Multiple variants per step (A, B, C, and more). There's no strict limit on the number of variants you can test.
Ready to hit primary?
Set up SendKit's isolated infrastructure and start sending in under 15 minutes.
Dedicated IPs on every plan. Cancel anytime.