Let optimization run your A/B tests
Write as many variants as you want for any step in the sequence. The optimization engine shifts sending volume toward whatever's winning and quietly pauses what isn't. You control the guardrails: minimum sends per variant, how many days it waits before acting, and the threshold that triggers an auto-pause.
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 | - | - | - | - | - |
The numbers choose the winner, not you
Create however many variants a step calls for, testing subject lines, body copy, or both in the same run.
Sending volume reallocates toward top performers automatically, with no manual intervention required.
Variants that consistently lag get paused once your configured thresholds are met.
A/B tests at one step run separately from every other — optimizing step 2 has no bearing on what happens at step 4.
Run the test, keep what wins
Draft multiple versions — A, B, C, and beyond — for any step in your sequence. Test subject lines, body copy, or both at once.
Decide the minimum sends per variant before optimization can act, how many days to wait first, and the threshold that triggers an auto-pause. A minimum variant count is available too.
From here, the system keeps shifting more volume toward whatever's converting best and automatically pauses variants that fall below your thresholds.
Run several subject lines on your first send. Once optimization spots a leader, that variant starts claiming most of the remaining volume.
Give each step its own set of variants running on its own clock. Optimize the entire sequence, not just the opener.
Try different value props, calls to action, or email lengths, and let performance data settle the argument instead of a gut call.
Optimization built on rules, not gut feel
The algorithm picks the winner, not a person
Plenty of tools let you set up variants and then leave the winner-picking to you. Sendbox's optimization engine reallocates volume toward top performers and pauses the rest automatically. You define the rules; the system executes them.
Optimization you can see into
You decide when the engine acts. Set the minimum sends per variant, the minimum number of days before anything gets paused, and the auto-pause threshold. Raise the minimum variant count if you'd rather keep more options alive longer. The math runs on your terms.
Got questions? We've got answers.
Still stuck? Talk to us →As many as you need — A, B, C, and beyond, with no strict ceiling.
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