Case Study: Nylas improves account synchronization performance by 500% with Speedscale

How Nylas earned the trust of its largest customers

Nylas, a fast-growing SaaS technology vendor that helps companies synchronize email, calendar, contacts, and other productivity data, was migrating from a monolith on EC2 to smaller services on Kubernetes while supporting rapidly growing traffic from larger customers. To ensure uptime, stability, and performance parity during this shift, Nylas turned to Speedscale and its traffic replay capabilities.

Using Speedscale’s traffic replay, traffic observation, and mock generation tools, Nylas was able to validate APIs and third-party dependencies like Office365 and Google Workspace at scale, all while accelerating testing and release cycles. With Speedscale, Nylas improved account synchronization performance by 500% over a few short releases, helping the team confidently complete architectural upgrades and continue scaling.

Nylas

David Ting

Vice President Engineering