Case Study: Zapier achieves error-free email at scale with Litmus

Zapier relies on Litmus to send error-free email at scale

Zapier, a high-volume email sender, relied on a small three-person email team while other marketers helped execute campaigns. Their previous manual testing process was time-consuming and error-prone—missed links, image ALT tags, preview text, and client-specific rendering issues were common—and non-email experts struggled to optimize for the subscriber experience.

Zapier implemented Litmus to create a formalized, step-by-step pre-send testing workflow. Litmus Test automated critical checks, made errors easier to catch or flag for experts, and improved visibility into mobile, image-off, and client rendering. As a result, Zapier scaled email production across the marketing org without the email team proofing every send, reducing errors and raising overall campaign quality.

Zapier

Sean Kennedy

Product Marketer