Fess vs Guru
Fess
fess.codelibs.org
Guru
getguru.comSide by side
| Figure | Fess | Guru |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 2 | 1 |
| Spec score · AI Enterprise Search Software | 8.3 (#6) | 8.0 (#9) |
| Spec score · Enterprise Search Software | 8.2 (#6) | 7.9 (#10) |
| Integrations | Fess can return search results in JSON, integrate with websites using JavaScript, and extend functionality through plugins. | Guru says it connects to more than 100 enterprise tools, including Slack, Microsoft Teams, Salesforce, Zendesk, Confluence, and SharePoint. |
| Product | Fess is an open-source enterprise search server for searching websites, files, and databases. | Guru describes itself as a self-improving knowledge platform that structures, verifies, and delivers trusted answers across an organization’s tools. |
Plans
In their own words
Guru
Guru is a paid knowledge platform for publishing trusted answers inside an organization. It combines a unified retrieval index and hybrid search across connected sources with Knowledge Agents that answer questions using governed content, citations, and permission-aware access. Guru connects to more than 100 enterprise tools, including Slack, Microsoft Teams, Salesforce, Zendesk, Confluence, and SharePoint. Automated verification uses usage signals, content age, and policy rules; Guru says this handles approximately 80–90% of verification. MCP support lets compatible AI tools and agents access the governed knowledge layer. A browser extension for Chrome, Microsoft Edge, and Opera surfaces answers in the workflow. Mobile apps support searching, viewing, sharing, and copying Cards, with listed requirements of iOS 12.1 or later and Android 10. Connected-source permissions carry across surfaces, alongside role-based access controls and single sign-on. Guru lists SOC 2 Type II auditing, GDPR support, Microsoft 365 and Google CASA certifications, and optional HIPAA agreements. Pricing is custom and available on request.