Best Unified API for Read and Write ATS Integrations (2025)

Unified.to offers a powerful solution for recruiting software by providing a unified API that streamlines integration with over 63 Applicant Tracking Systems (ATS), including platforms like Greenhouse, Lever, and iCIMS. This API normalizes data across various ATS platforms into a consistent schema, enabling real-time, bi-directional data access without the need for storing customer data. It features real-time delivery through virtual webhooks, supports custom fields and objects, and ensures compliance with security standards like SOC 2 Type II and GDPR. Unified.to distinguishes itself with a zero-storage architecture, ensuring data is fetched live from source APIs, and offers a developer-friendly experience with multiple SDKs and usage-based pricing. Its AI-native integrations support Model Context Protocols (MCP), allowing seamless interaction with large language models for enhanced recruiting workflows.