Odoo HR is divided into 4 different apps: Recruitment, Vacations, Expenses and Appraisal at $15/month each and can be used individually. Odoo recommends the Online Edition for companies with less than 50 people using Odoo. This cloud version is hosted on Odoo servers. For this service an extra fee of $25/user/month is added. For companies with more than 50 people using Odoo, the On-Premise version is recommended. Odoo On-Premise is deployed locally.