Nylas

Nylas provides a set of unified APIs for email, calendar, and contacts that let developers embed communication features into their own applications. The platform connects to major providers such as Google, Microsoft, and IMAP-based email services, abstracting away the differences between them into a single integration point. It targets software engineering teams at SaaS companies, particularly those building CRM, scheduling, recruiting, or productivity tools that need to sync and act on user email and calendar data. Core capabilities include email sending and threading, calendar event management and scheduling links, contact synchronization, and webhook-based real-time updates. Nylas also offers security and compliance tooling, including OAuth-based authentication and data handling designed to meet enterprise requirements around user permissions and data residency.