Architecture comparison
HR
Deel runs a proprietary, multi-tenant SaaS platform (app.deel.com / api.letsdeel.com) on AWS with separate sandbox and production environments, using relational and NoSQL databases behind REST APIs consumed by customers and integrations.[3][10][4] AI is incorporated primarily at the application and workflow layer to automate compliance, payroll, and HR processes, rather than as a foundational LLM-native architecture.[6][4]
HR
Runs Illuminate, its own ~800B-parameter LLM trained on HR/finance data from 10,500+ customers (800B transactions/yr) for privacy + enterprise fit; acquired Sana (2025) for custom AI agents.