Procurement Software

I am looking to procure software that meets my needs as a business owner. Specifically, I need software that can manage purchase orders, suppliers, and inventory. What's more, I'm open to a solution that can integrate with my current systems, though I am not yet sure what those may be. As far as the platform goes, I'd prefer something that is cloud-based, since it can provide more flexibility and scalability than software based on Windows or Mac. If you have a software that could meet these needs, I'd love to hear more!