Nango

Nango is an open source platform for building product integrations that connects SaaS applications to third-party APIs. By providing a unified infrastructure for OAuth authentication, data synchronization, webhook handling, and API proxying, Nango eliminates the repetitive, complex work of implementing each third-party integration from scratch.

The core problem that Nango solves is the substantial engineering effort required to build and maintain native product integrations. Each third-party API has its own authentication flow, rate limits, pagination conventions, data models, and quirks. Building integrations with dozens of APIs means repeatedly solving the same infrastructure problems, while also maintaining the integrations as APIs evolve and authentication tokens expire. Nango centralizes this infrastructure so that product teams can focus on the integration logic that provides user value rather than the plumbing.

Nango Auth handles the OAuth authentication flow for over 250 pre-configured API providers. When a user wants to connect their GitHub, Salesforce, HubSpot, Slack, Google, or any other supported account, Nango displays the appropriate OAuth consent screen, handles the authorization code exchange, and stores the access and refresh tokens securely. Token refresh is managed automatically, ensuring that stored credentials remain valid without any application code handling the refresh logic.

Integration scripts in Nango are TypeScript functions that define how to sync data from a third-party API. A sync script implements the logic for fetching resources from the API, handling pagination and rate limiting, transforming the data, and persisting it to Nango's managed database. Nango executes these scripts on a defined schedule or in response to webhooks, keeping the synchronized data current.

The Nango Proxy feature enables making authenticated API calls to third-party services on behalf of connected users without managing access tokens in application code. The application sends the request to Nango with the user's connection ID, and Nango injects the appropriate authentication credentials and forwards the request to the target API. This decoupling simplifies application code and centralizes credential management.

Webhooks from third-party APIs can be received and processed through Nango. Nango validates webhook signatures, handles deduplication, manages delivery retries, and routes events to the appropriate processing logic. This eliminates the need to build and maintain webhook infrastructure in each application.

Nango is self-hostable using Docker and has a managed cloud offering. The open source model and Nango's integration library of pre-built sync scripts for popular APIs accelerate the development of new integrations significantly.