How often ChatGPT mentions Glean for enterprise search software, and how it stacks up against the tools that dominate the answers.
Share of ChatGPT answers naming each tool, same 1 questions.
| # | Tool | Visibility | |
|---|---|---|---|
| 1 | Glean ← this tool | 100% | |
| 2 | Elastic | 100% | |
| 3 | Coveo | 100% | |
| 4 | Microsoft 365 | 100% | |
| 5 | Copilot | 80% | |
| 6 | Microsoft 365 Copilot | 67% | |
| 7 | Algolia | 47% | |
| 8 | Sinequa | 47% | |
| 9 | Gemini Enterprise | 33% | |
| 10 | Microsoft Search | 33% | |
| 11 | Lucidworks | 33% | |
| 12 | Microsoft 365 Copilot Search | 27% |
Free account, see every engine, the trend over time, and which sources to win.
The questions where ChatGPT currently names Glean.
If you mean employee-facing enterprise search across Slack, Google Drive, Microsoft 365, Salesforce, Jira, Confluence, etc., my 2026 shortlist is:
| Platform | Best for | My take |
|---|---|---|
| Glean | Best overall | ⭐ Top pick for most large companies |
| Microsoft 365 Copilot Search | Microsoft-heavy enterprises | Best if you're deeply invested in M365 |
| Coveo | Large-scale search, support & commerce | Excellent relevance/search infrastructure |
| Elastic | Engineering-led/custom deployments | Most flexible, but requires more engineering |
| **Google Gemini Enterprise | Google Workspace organizations | Strong native Google ecosystem option |
| Guru | Verified internal knowledge | Great when knowledge governance matters |
1. Glean — best overall
Glean is probably the strongest choice if your goal is “Google-like search for the entire company.” It combines enterprise search with an AI assistant, knowledge graph, and agents, and supports a broad set of business applications with permission-aware access. G2 currently shows 4.7/5 across 266 reviews, while Gartner shows 4.5/5 across 360 ratings. G2 Gartner
2. Microsoft 365 Copilot Search — best for Microsoft shops
Microsoft's current Copilot Search provides unified search across Microsoft 365 and third-party sources, with 100+ connectors in the Microsoft catalog plus custom/ISV connectors. Microsoft Learn
3. Coveo — best for sophisticated relevance
Coveo is particularly compelling if search isn't just an employee knowledge problem—e.g. you also need customer-service, ecommerce, or highly tuned search experiences. G2 currently rates it 4.3/5 from 142 reviews. G2
4. Elastic — best if you have a strong engineering team
Elastic gives you substantially more control over indexing, relevance, vector search, retrieval and infrastructure. It's a better choice when you want to build your own search/RAG platform rather than buy a turnkey workplace-search product. G2 currently lists Elasticsearch at 4.5/5 from 292 reviews in its enterprise-search category. G2
If I were running an enterprise RFP, I'd start with:
Glean vs. Microsoft Copilot Search vs. Coveo vs. Elastic
The biggest buying criterion isn't actually the AI model—it's connector coverage + permission synchronization + search relevance + freshness of indexed data. A brilliant AI assistant is useless if it can't reliably retrieve the document your employee is looking for.
If you tell me your company size, tech stack (Microsoft/Google/Slack/Salesforce/etc.), and approximate budget, I can narrow this to the best 2–3 options and compare pricing, security, connectors, implementation effort, and ROI.
2. Microsoft 365 Copilot Search — best for Microsoft shops
Microsoft's current Copilot Search provides unified search across Microsoft 365 and third-party sources, with 100+ connectors in the Microsoft catalog plus custom/ISV connectors. Microsoft Learn
3. Coveo — best for sophisticated relevance
Coveo is particularly compelling if search isn't just an employee knowledge problem—e.g. you also need customer-service, ecommerce, or highly tuned search experiences. G2 currently rates it 4.3/5 from 142 reviews. G2
4. Elastic — best if you have a strong engineering team
Elastic gives you substantially more control over indexing, relevance, vector search, retrieval and infrastructure. It's a better choice when you want to build your own search/RAG platform rather than buy a turnkey workplace-search product. G2 currently lists Elasticsearch at 4.5/5 from 292 reviews in its enterprise-search category.