How often ChatGPT mentions Microsoft 365 Copilot Search 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 | 100% | |
| 2 | Coveo | 100% | |
| 3 | Guru | 100% | |
| 4 | Elastic | 100% | |
| 5 | Google Gemini Enterprise | 100% | |
| 6 | Sinequa | 50% | |
| 7 | Microsoft 365 Copilot Search ← this tool | 50% |
Free account, see every engine, the trend over time, and which sources to win.
The questions where ChatGPT currently names Microsoft 365 Copilot Search.
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.