Can someone recommend a CRM? Preferably open source and free? Currently we are considering odoo but any advice appreciated. https://comparisons.financesonline.

Can someone recommend a CRM? Preferably open source and free? Currently we are considering odoo but any advice appreciated. https://comparisons.financesonline.com/sugar-crm-vs-odoo https://comparisons.financesonline.com/sugar-crm-vs-odoo