Case Study: OnTheClock achieves 99% reduction in email delivery issues with Postmark

OnTheClock fixes 99% of their email issues by switching to Postmark

OnTheClock, a modern online employee time clock used by over 7,000 companies, was plagued by transactional email deliverability problems—important messages like clock‑in/clock‑out notifications weren’t reaching customers. Founder Dean Mathews evaluated several providers and chose Postmark for its Delivery-focused transactional email service, clear documentation, pricing, and simple API integration.

Postmark’s transactional email system was implemented to handle OnTheClock’s ~50,000 emails/month and immediately improved delivery rates: the switch fixed 99% of their email issues, sharply reducing customer complaints and restoring reliable notifications. OnTheClock now reports far better deliverability and smoother operations after moving to Postmark.

OnTheClock

Dean Mathews

Founder