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Have a question, suggestion, or need help with the calculator? We'd love to hear from you. At Open-rate.com, we're committed to helping businesses optimize their email marketing ROI through our free suite of calculators, comparison guides, and educational content.
Whether you're comparing ESPs like Mailchimp, Klaviyo, or Brevo, working on your email marketing strategy, need help understanding a calculator, or found a bug — drop us a message and we'll get back to you within 1-2 business days. We also welcome suggestions for new calculator tools or content you'd find valuable.
Before reaching out, you may find quick answers in our FAQ & Glossary or Methodology page which explains how each calculator works. For ESP pricing questions, see our benchmarks page with data from industry sources.
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