Factorial API
Factorial has a documented public REST API with dated versions, a demo environment, and native webhooks. Access is self-serve via admin-panel API keys, or OAuth 2.0 for multi-tenant partners. No official SDKs; most integrators code straight against REST.
Frequently asked questions
Factorial scores A+ on the API Report Card. Factorial has a documented public REST API with dated versions, a demo environment, and native webhooks. Access is self-serve via admin-panel API keys, or OAuth 2.0 for multi-tenant partners. No official SDKs; most integrators code straight against REST.
Factorial has a workable official integration path. Most engineering teams can build against it directly. Open API: self-serve, documented, with SDKs
Factorial is a Barcelona-based cloud business management platform that unifies HR, payroll, time tracking, talent, finance, and IT management for small and mid-market companies.
Vertical: Enterprise / HR / ERP (Sanity vertical mapping: Enterprise/HR/ERP; Airtable bucket: misc). Target market: SMB and lower mid-market companies, typically 10-500 employees, with a sweet spot around 30-250. HR system of record: employee profiles, contracts, documents, org chart, teams, locations. Time off and leave management (request, approval, balance tracking, calendar sync, country-specific leave types).
High within European SMB HR; moderate-to-rising globally.
HR system of record: employee PII (name, DOB, address, national ID, tax ID, bank details, IBAN), employment contracts, contract types, compensation history, role/title/department, manager relationships, family/dependents.
Founded 2016, ~10 years old as of 2026. Cloud-native from inception, hosted on AWS, with a multi-tenant SaaS architecture and Spanish/Catalan/English/French/German/Italian/Portuguese localization.
Grades measure one thing: can a customer's engineering team get their own data out programmatically? We check six things (whether a real API exists, how access is gated, data coverage, auth quality, docs and developer experience, and stability) and roll them into a letter grade. Grades get re-verified, and they only move on evidence.