Cold Email A/B Testing, Test Subject Lines & Body Copy
Find the message that converts with cold email A/B testing.
Bulk Email Boxer A/B testing splits your audience across variants and shows you which version performs better.
The problem
Most cold emailers guess at what subject lines and body copy work instead of systematically testing.
The solution
Bulk Email Boxer A/B testing splits your audience across variants and shows you which version performs better.
Everything you need, included
- A/B test subject lines, body copy, and CTAs per step
- Automatic audience splitting (50/50 or custom)
- Per-variant open rate, click rate, and reply rate
- Winner detection with statistical confidence
- Test multiple variants per sequence step
- Apply winning variant to future steps
Simple, flat pricing
Starter: $40/mo · Growth: $90/mo · Scale: $350/mo
All plans include warmup, sequences, A/B testing, and reply tracking. No per-seat fees.
How it works
Connect your email account, import your contacts, build a sequence, and launch. Warmup runs automatically. Replies land in your unified inbox.