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Nylas
The universal API platform for email, calendar, and contacts integration.
What it does
Provides a single API to integrate with 100% of the world's email, calendar, and contacts. Automates bi-directional syncing of messages, events, and contact data. Features a ready-made 'Scheduler' component for embedding booking pages in apps. Includes 'Nylas Neural' for AI-driven sentiment analysis and data extraction from emails. Ensures enterprise-grade security and compliance for sensitive communication data.
Why it works
Consolidation: Replaces hundreds of individual provider integrations with one clean REST API. Speed: Reduces months of complex backend engineering to a few days of SDK implementation. Maintenance: Nylas handles all the breaking changes and API updates from providers like Microsoft and Google. Intelligence: Their AI layer turns unstructured email data into actionable business insights.
Category: Utilities & System Tools
Team Size: 87
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As of 2026
Utilities & System Tools
Revenue: $50M-$100M ARR
The universal API platform for email, calendar, and contacts integration.
Overview
Nylas is a developer-first platform that provides a single, unified API to connect with all major email, calendar, and contact providers globally. It handles the complex infrastructure of syncing millions of data points from providers like Gmail, Outlook, and iCloud, allowing software teams to build communication features like scheduling, automated email workflows, and contact management without building custom integrations for every provider.
Funding status: Funded
Revenue source: Subscriptions & Usage Fees
Customer type: B2B
Pricing: Usage-based
Tech stack: Python, React, Node.js, AWS
Platform: API • Web
Integrations: Gmail, Outlook, iCloud, Office 365, Exchange, Yahoo
Founder story
Founded in 2013 by Michael Grinich, Christine Spang, and Gleb Polyakov in San Francisco. Michael and Christine, both MIT alumni, realized that while the web was moving forward, email infrastructure was stuck in the 1980s. They built Nylas to modernize how applications interact with the world's primary communication protocols.
What it does
- Provides a single API to integrate with 100% of the world's email, calendar, and contacts
- Automates bi-directional syncing of messages, events, and contact data
- Features a ready-made 'Scheduler' component for embedding booking pages in apps
- Includes 'Nylas Neural' for AI-driven sentiment analysis and data extraction from emails
- Ensures enterprise-grade security and compliance for sensitive communication data.
Who it's for
- SaaS Developers
- Product Managers
- CTOs
- CRM and HR Tech Builders
Why it works
- Consolidation: Replaces hundreds of individual provider integrations with one clean REST API
- Speed: Reduces months of complex backend engineering to a few days of SDK implementation
- Maintenance: Nylas handles all the breaking changes and API updates from providers like Microsoft and Google
- Intelligence: Their AI layer turns unstructured email data into actionable business insights.
Growth strategies
- Targeted the high- growth 'Sales Tech' and 'HR Tech' verticals where email/calendar sync is a core requirement.
- Used a 'Land and Expand' model, starting with engineering teams and scaling across product lines.
- Raised $175M in total funding, including a $120M Series C, to dominate the CPaaS (Communication Platform as a Service) market.
- Built a high- authority developer blog and documentation hub to become the 'Stripe' of email APIs.
Alternatives
Comparison overview
- Cronofy: More focused on pure calendar sync; Nylas is a more comprehensive email + calendar + contacts suite.
- Merge.dev: A unified API for everything (HRIS, ATS); Nylas is the deep specialist for communications.
- Nylas is the premier choice for professional SaaS teams building communication-heavy applications.