Free CRM A/B Testing and Email Templates
CRM A/B Buddy is a free browser-based tool for CRM and email marketing teams. Run statistically valid A/B tests and build production-ready email templates without a data science team or a paid platform.
A/B Test Analyser
Upload your campaign CSV to get z-test significance results, segment balance checks, outlier detection and exportable reports. Everything runs in your browser. No data leaves your device.
- Sample size calculator for one-time sends and automated journeys
- Segment balance checker to validate your audience split
- Outlier detection with Winsorisation for revenue metrics
- Two-proportion z-test with p-value, confidence intervals and relative uplift
- Export results to Excel or copy a plain-text summary
Email Template Builder
Drag-and-drop email builder with 15 block types. Build, preview and export production-ready HTML for Klaviyo, Mailchimp or any ESP. No account required.
- Heading, text, image, button, divider and spacer blocks
- Navbar, footer, product grid, columns and box layout blocks
- Desktop and mobile preview
- Export as plain HTML, Klaviyo or Mailchimp format
- Import and round-trip edit existing HTML emails
Built for lean CRM teams
Both tools are free and require no account. Your data never leaves your browser. Designed for CRM analysts and email marketers who need rigorous results without the overhead of enterprise tooling.
Open the free A/B test analyser or open the email template builder.