Case Study: Invoice Ninja achieves reliable transactional email delivery and tracking with Postmark

Invoice Ninja increases deliverability for their critical emails

Invoice Ninja, co-founded by Shalom Stark and Hillel Coren, is an open-source invoicing, payments, time-tracking and expense platform for freelancers and small teams. Because invoices and payment emails are mission-critical, Invoice Ninja needed guaranteed transactional email delivery and engagement tracking, and chose Postmark for transactional emailing.

Postmark provided transactional email services with Open Tracking, Link Tracking, and Bounce Handling so Invoice Ninja can reliably deliver and monitor invoices and payment notices. The solution supports about 150k emails processed per month, improved deliverability and visibility into opens/links/bounces, and lets users promptly repost, resend, or record payments—Invoice Ninja has relied on Postmark since April 2015.

Invoice Ninja

Shalom Stark

Co-founder