Nango sits between raw API client libraries and full workflow automation platforms, providing the critical infrastructure layer that handles the unglamorous but essential work of API integration. For each of its 700+ supported APIs, Nango manages the complete OAuth flow including token refresh, handles rate limiting and retries, provides typed data models, and offers sync pipelines that keep local data up to date with external services. This eliminates weeks of integration engineering for each new API connection.
The platform is particularly relevant for AI agent development, where agents need to interact with dozens of external services — CRMs, project management tools, communication platforms, and data sources. Instead of building custom integration logic for each service, developers configure Nango connectors that handle authentication and data access, then expose them through a unified API or MCP server that agents can consume. The built-in observability tracks sync health, API call volumes, and error rates across all integrations.
Backed by Y Combinator W23 and $7.5M in funding led by Gradient Ventures, Nango serves over 100 B2B SaaS companies in production. The core platform is open source under Apache-2.0 with self-hosting support, while a managed cloud option handles infrastructure and scaling. With over 7,000 GitHub stars and active development, Nango has established itself as the open-source answer to Merge.dev and Apideck for teams building products that need to connect to the long tail of SaaS APIs.
