Doyna vs Glean vs Microsoft Copilot: which enterprise AI is right for you?
A side-by-side comparison of three enterprise AI platforms on the criteria that actually matter: data privacy, deployment flexibility, search quality, and total cost of ownership.
Every enterprise AI buyer ends up comparing the same three names: Glean, Microsoft Copilot, and Doyna. This post is our honest comparison — written by the Doyna team, so take it with appropriate bias, but we'll try to be fair about where each product wins.
The short version
| Criteria | Glean | Microsoft Copilot | Doyna |
|---|---|---|---|
| Self-hosted option | No | No | Yes |
| Cloud option | Yes | Yes | Yes |
| Starting price (per seat/month) | ~$15-25 (enterprise only) | $30 | €23 |
| Training on your data | No (contractual) | Vendor-controlled | Never |
| Unified search sources | Email, docs, Slack, Jira, etc. | Microsoft 365 ecosystem | Email, docs, meetings, CRM, chat, projects |
| Knowledge graph | No | MS Graph (limited) | Yes (Neo4j, full entity extraction) |
| Document generation (PPTX/PDF) | No | Basic (Copilot in PowerPoint) | Yes (25-35 LLM call pipeline, real charts) |
| Native Romanian support | No | Translation layer | Yes |
| Air-gapped operation | No | No | Yes (self-hosted) |
| Project management | No | Via Planner/To-Do | Yes (Doyna Pulse) |
| BYO LLM | No | Azure OpenAI only | Any OpenAI-compatible |
Where Glean wins
Glean is the category leader in enterprise search. They have the deepest connector library — if you need to search across 50+ SaaS tools (Slack, Jira, Confluence, Notion, Salesforce, etc.), Glean has connectors for all of them. Their search quality on English-language content is excellent.
Glean also has the most mature enterprise sales motion. If you're a Fortune 500 company with a procurement team that needs SOC 2 Type II, Glean has it. They're the safe choice for large companies.
Glean's weakness: No self-hosted option, no document generation, no knowledge graph beyond search-powered suggestions, no native non-English support, and enterprise-only pricing that starts at six figures annually.
Where Microsoft Copilot wins
If your entire company runs on Microsoft 365 — Outlook, Teams, SharePoint, Word, Excel, PowerPoint — then Copilot's integration is unbeatable. It lives inside the tools you already use, which means zero adoption friction.
Copilot can draft emails in Outlook, summarize Teams meetings, create PowerPoint slides from Word documents, and analyze Excel data using natural language. The Microsoft Graph gives it access to your organizational hierarchy, calendar, and file permissions out of the box.
Copilot's weakness: Locked to the Microsoft ecosystem. If you use Gmail, Google Drive, Slack, or any non-Microsoft tool, Copilot can't see it. The privacy model is vendor-controlled — your data flows through Microsoft's multi-tenant infrastructure, and you can't audit the path. No self-hosted option. No BYO LLM. No knowledge graph beyond MS Graph. And $30/user/month on top of your existing M365 license adds up fast.
Where Doyna wins
Doyna is the only option in this comparison that offers both cloud AND self-hosted deployment from the same codebase. This is the core differentiator: you choose where the AI runs, and the feature set is identical either way.
The privacy model is the strongest of the three: single-tenant architecture (even on cloud), zero-training guarantee that's contractually enforced and technically isolated, and an air-gap option for the most sensitive environments.
Doyna also has features that neither Glean nor Copilot offer: a full knowledge graph powered by Neo4j (not just search results — actual entity-relationship mapping), document generation with real chart rendering (not markdown exports), a built-in project management tool (Doyna Pulse) that connects tasks to the emails and meetings that generated them, and native Romanian language support.
Doyna's weakness: Smaller team, younger product. Fewer third-party connectors than Glean (Doyna currently connects to Gmail, Outlook, Google Drive, SharePoint, with SAP/Salesforce/Jira in progress). No Slack or Teams integration yet. The desktop app is Tauri-based, not a browser extension that lives inside your existing tools.
Which one should you pick?
- Pick Glean if you're a large enterprise (500+ employees), need to search 20+ SaaS tools, and don't need self-hosted deployment or document generation.
- Pick Copilot if your company is 100% Microsoft 365 and you want zero-friction adoption inside Outlook/Teams/Word.
- Pick Doyna if data privacy is a hard requirement, you need self-hosted or air-gapped deployment, you value document generation and knowledge graph features, or you're a Romanian company that needs native language support.