SendKit
Login
a/b testing

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.

Set up in under 15 minutesBacked byantx.vc
UnderstoryThe PlaybookLeadHaste11xVectify
Lambda GroupLambda Group
Company Logo
SendKit

Campaigns

Search 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
testing tools

Let the data pick the winner

Multiple variants per step

Create as many variants as you need per email step. Test subject lines, body copy, or both at once.

Auto-optimization

Automatic volume allocation toward winning variants. No manual intervention needed.

Auto-pause underperformers

Variants that consistently underperform get paused automatically based on your configured thresholds.

Per-step independence

Each step in your sequence runs its own A/B test. Optimizations at step 2 don't affect the test at step 4.

workflow

Test variants, keep what converts

Create your variants

Write multiple versions (A, B, C, etc.) for any step in your sequence. Test subject lines, body copy, or both.

Configure optimization rules

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.

Optimization takes over

The algorithm continuously allocates more volume to better-performing variants and auto-pauses underperformers once your thresholds are met.

Subject line optimization

Test multiple subject lines on your initial sends. Once Smart optimization identifies a winner, it gets the lion's share of remaining volume.

Multi-step testing

Each step in your sequence can have its own set of variants running independently. Optimize at every touchpoint.

Copy iteration

Try different value props, CTAs, or email lengths. Let the data decide what resonates instead of guessing.

Start sending
under the hood

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.

vs Instantly
SendKit
vs Lemlist
SendKit

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.

frequently asked questions

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.

start sending today

Ready to hit primary?

Set up SendKit's isolated infrastructure and start sending in under 15 minutes.

Dedicated IPs on every plan. Cancel anytime.