Bitrix24 has been pretty successful going against Odoo, though Bitrix24 is not an ERP system per say - https://www.bitrix24.com/tools/ https://www.bitrix24.com/

Bitrix24 has been pretty successful going against Odoo, though Bitrix24 is not an ERP system per say - https://www.bitrix24.com/tools/ https://www.bitrix24.com/tools/ . The hybrid approach (Bitrix24 is free in cloud, source code is available to commercial users) seems to work great with businesses that have a limited budget. Open source products are great but unless you are a techie yourself, high labor costs make deployment too expensive oftentimes. This is especially true for smaller project with small or no budget.