Experimentation & A/B Testing
Run A/B tests and holdout experiments across channels and journeys, and measure true incremental impact.
Opinions are cheap; experiments are decisive. WeZend lets you A/B test subject lines, content, channels, timing and entire journey branches, and reserve holdout groups that receive nothing — so you can measure the real incremental lift a message or automation produced, not just its surface metrics. Winners can be promoted automatically, so your programs keep improving without manual analysis.
Benefits
Why it matters
True incrementality
Holdout groups reveal the lift you actually caused, separating signal from baseline.
Test anything
Subject lines, content, channel, send-time or whole journey paths.
Auto-promote winners
Statistically significant winners can roll out to the full audience automatically.
Capabilities
What you can do
Multivariate A/B tests
Split traffic across variants with configurable allocation and significance.
Global & per-journey holdouts
Reserve control groups at the campaign, journey or program level.
Revenue-based results
Measure outcomes in conversions and revenue, not just opens and clicks.
Frequently asked questions
What's a holdout group?
A randomly withheld set of customers who receive nothing, so you can measure what your messaging genuinely added.
Related
Analytics & Attribution
Funnels, cohorts, attribution and revenue reporting unified across all channels and journeys.
Email API & Marketing
High-deliverability email with double opt-in, one-click unsubscribe, open/click tracking and A/B testing.
Journey Orchestration
A visual, drag-and-drop builder for multi-step, cross-channel journeys triggered by real-time events.
AI Agents & Automation
AI agents that answer conversations, copilots that draft campaigns, and predictive models that pick the next best action.
One platform. Every customer interaction.
Replace your patchwork of messaging APIs, CDP and automation tools with a single engagement platform built for scale.
No credit card required · EU data residency · 99.99% uptime SLA