How often ChatGPT mentions Google Vertex AI 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 | Coveo | 100% | |
| 2 | Glean | 100% | |
| 3 | Elastic | 100% | |
| 4 | Copilot | 80% | |
| 5 | Microsoft 365 Copilot | 80% | |
| 6 | Google Gemini Enterprise | 60% | |
| 7 | Gemini Enterprise | 60% | |
| 8 | Guru | 40% | |
| 9 | Google Vertex AI Search ← this tool | 20% | |
| 10 | Lucidworks | 20% | |
| 11 | Microsoft 365 Copilot Search | 20% | |
| 12 | Algolia | 20% |
Free account, see every engine, the trend over time, and which sources to win.
The questions where ChatGPT currently names Google Vertex AI Search.
If you mean enterprise search for employees to find information across Slack, Google Drive, Microsoft 365, Jira, Salesforce, Confluence, etc., my 2026 shortlist is:
| Rank | Platform | Best for | My take |
|---|---|---|---|
| 1 | glean.com | Best overall | Best combination of AI answers, enterprise connectors, permissions, relevance, and knowledge graph |
| 2 | coveo.com | Customer/service search | Excellent relevance and personalization, particularly for support, ecommerce, and customer-facing experiences |
| 3 | azure.microsoft.com | Microsoft/Azure shops | Strong choice if you're already heavily invested in Azure, Microsoft 365, and custom AI/RAG |
| 4 | cloud.google.com | Google Cloud shops | Strong for organizations already using Google Cloud and Gemini |
| 5 | elastic.co | Build-your-own search | Extremely flexible and powerful, but requires considerably more engineering |
For a large company wanting an employee-facing "Google for the company", I'd start with Glean.
It searches across 275+ connectors, understands natural-language queries, uses a company knowledge graph, generates answers/summaries, and enforces existing permissions so employees only see information they're authorized to access. Glean Glean Documentation
Glean has also evolved beyond traditional search into an enterprise AI platform with Assistant and Agents, so you're effectively buying search plus a foundation for enterprise AI workflows. Glean
Bottom line: If you want something employees can start using rather than a search engine your developers have to build, Glean is probably the strongest default choice in 2026.
If you tell me your company size, Microsoft vs. Google stack, and what systems you need to search (Slack, Salesforce, Jira, SharePoint, etc.), I can give you a more rigorous Glean vs. Coveo vs. Microsoft vs. Elastic comparison, including likely pricing and implementation effort.
Glean has also evolved beyond traditional search into an enterprise AI platform with Assistant and Agents, so you're effectively buying search plus a foundation for enterprise AI workflows.