Does anyone know Knowledge Management software that best for small office use?

Confluence by Atlassian has worked out great for me in the past. You can track changes, control rights to edit (and more) and take advantage of lots of features. It also integrates with other Atlassian tools. Let me know if you'd like further info or details on my past implementations.

Use MediaWiki. It's the platform used by Wikipedia, easy to set up, secure, well tested and familiar interface for collaborative knowledge management.

By bringing all work and knowledge together and making it highly customizable, Notion creates focus and transparency, while consolidating tools, saving time, and driving more productivity for teams of all sizes. SaaS-based SABIO gets the most out of your organizations knowledge because its easy to use, deploy, and administer. Simple and intuitive knowledge management software, for more productive customer service organizations. PICC turns companys knowledge into a competitive advantage. Suited for Mid to large size companies. Elium is a high-quality social knowledge management solution that focuses on content relevance. Managers need a way to break down information silos and make sure everyone has the information they need, without bombarding them with unnecessary documents. With a platform like Elium, managers have one central space to organize, discuss, and share information. Large enterprise organizations use the Nuxeo Platform to build intelligent knowledge management systems for searching, managing, and accessing otherwise hidden information across multiple systems. With a flexible metadata model, intuitive search capabilities, native workflows, connectors, and analytics, the Nuxeo Platform is ideal for complex knowledge management applications. The Nuxeo Platform provides every core knowledge management capability you would expect from an enterprise platform. Onna makes it easy to centralize and index all your enterprise knowledge across applications for superior search, sharing, and collaboration. Grab data by the horns with enhanced machine learning technologies to deliver faster data classification, knowledge management, and predictive search. Onna will centralize and index all your enterprise knowledge across apps for superior management, search, sharing, and collaboration.
You can read more here: https://www.capterra.com/knowledge-management-software/#buyers-guide
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath