FreeITSM vs Tessio
FreeITSM
freeitsm.co.ukTessio
tessio-ai.github.ioSide by side
| Figure | FreeITSM | Tessio |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 3 |
| Spec score · IT Knowledge Base Software | 8.9 (#9) | 7.3 (#50) |
| Knowledge base | Knowledge supports rich-text articles, folders, audience visibility, review workflows, semantic search and AI chat. | The knowledge base supports self-service articles and an Ask Tess answer box over the knowledge base. |
| Product | FreeITSM is an open-source IT service management platform with 23 integrated modules. | Tessio is a self-hosted IT service management platform with ticketing, inventory, a knowledge base, forms, dashboards, and workflow automation. |
| Workflow automation | Workflows use a visual canvas with more than 138 triggers, outbound webhooks and an AI co-author. | The visual workflow builder supports branches, ticket updates, comments, HTTP calls, and sandboxed scripts. |
Plans
In their own words
FreeITSM
FreeITSM is an open-source IT service management platform with 23 integrated modules for running a service desk. Its Tickets module connects Microsoft 365 and Google Workspace mailboxes for email ticketing, assignment, prioritisation, replies, attachments and audit trails. Assets tracks physical and virtual equipment and can discover VMware virtual machines through vCenter. Listed service-management tools include risk assessment, approval workflows, change calendars and change audit trails. Optional AI features provide knowledge answers, ticket-reply cleanup, form assistance, workflow authoring and problem detection. They use a customer-provided Anthropic, OpenAI or OpenRouter key, and provider usage may cost extra. FreeITSM runs with Docker on Linux or Windows, or through IIS with PHP or WAMP and MySQL 8.0+ or MariaDB 10.5+. Security options include OpenID Connect SSO, AES-256-GCM key management, TOTP multi-factor authentication, account lockout, brute-force protection and trusted devices. The project has no formal support.