Choose enterprise search by the systems and permissions it must bring together, then by who will maintain the experience. Glean offers a workplace search layer; Microsoft Copilot Search fits an eligible Microsoft environment; Coveo can place knowledge into existing employee touchpoints; Sinequa targets a broad enterprise knowledge layer; Elasticsearch gives engineering teams more control over the search application. These are alternatives for finding internal business knowledge, but they involve different ownership models. A configurable engine is not the same purchase as a ready employee search experience.
What the buying decision includes
The job here is finding existing internal documents, messages and business records across systems, rather than searching a public website or writing a new knowledge base. Compare the actual connector for each important source, identity mapping, access updates, search location and commercial entitlements. Document-level controls are only useful when source permissions and identities are correct. An answer with citations can still use outdated material, so assign owners for source freshness and content retirement as well as access.
| Product | Employee experience | Ownership boundary | Commercial or technical check |
|---|---|---|---|
| Glean | Search across connected workplace systems | Native connectors plus custom indexing where needed | Database/custom-source connector work |
| Microsoft Copilot Search | Search in the Microsoft Copilot app | Eligible license and connector ingestion | Search not included with Copilot Chat |
| Coveo | Knowledge within intranets and employee portals | Choose the workplace product and integration | User versus query entitlement; AI additions |
| Sinequa | Enterprise knowledge search and assistance | Scope complex repositories and document security | Quoted deployment, connectors and AI scope |
| Elasticsearch | Custom internal search application | Engineering owns ingestion, UI and authorization design | Connector-specific security and deployment costs |
Glean
Glean's search documentation describes a connector-based internal search system that uses content, activity and identity information. Its visibility model follows connected-source permissions. For unsupported applications, it offers an Indexing API; database ingestion also requires that route rather than a native database connector. This is a consequential difference between having an app on a connector list and needing a custom data pipeline. Glean official source.
Shortlist Glean when employees work across several supported SaaS systems and want a common workplace entry point. Its product page offers search and APIs across enterprise applications. Ask for a proposal covering the actual applications, permission-sync behavior and custom indexing, rather than assuming every database is already searchable. Source access remains a deployment responsibility; documented permission enforcement is not evidence that your organization's existing sharing settings are appropriate. Glean official source.
Microsoft Copilot Search
Microsoft Copilot Search is available in the Microsoft Copilot app to users with an eligible license. Microsoft's FAQ distinguishes it from Copilot Chat, which does not include the Search experience. It can bring third-party content into the Microsoft ecosystem through Copilot connectors, with setup involving a connection, schema and content ingestion. Existing Microsoft subscriptions alone are therefore insufficient to establish the entire proposed deployment cost. Microsoft Copilot Search official source.
Start here when the organization already licenses the eligible experience and wants search in that app. The FAQ says Search itself has no additional charge within the eligible license, while connector features or capacity may have further licensing conditions. Confirm entitlement against the tenant's current agreement and exact connector. This option becomes less compelling if the requirement is an independently designed search interface embedded across unrelated employee portals. Microsoft Copilot Search official source.
Coveo
Coveo's workplace offering emphasizes knowledge discovery inside intranets, employee self-service, departmental portals and help-desk experiences. That makes it relevant when the destination already exists and search needs to appear there. Its product entitlements separate Service, Workplace and Website use cases. A public-site search subscription is not evidence that internal workplace deployment is covered. Coveo official source.
The entitlement document adds a material AI boundary: user-based offerings are for human users; agents and automated use require a queries-per-month offering. Generative capabilities are additions to a standard subscription and include their own query and semantic-item allowances. Compare the exact Workplace product, interface integration and any agent retrieval together. Seat count alone cannot price a combined human and automated knowledge-retrieval deployment. Coveo official source.
Sinequa
Sinequa presents enterprise search as part of a broader knowledge platform connecting internal sources for search, assistance and agents. Its current search offering emphasizes discovering documents, topics and expertise across enterprise knowledge. This is relevant when the brief extends beyond a few common SaaS applications into a more varied information estate. Treat that breadth as a proposal requirement rather than proof that every repository is immediately supported. Sinequa official source.
Its platform describes document-level security and grounding in internal knowledge. Ask how the proposed deployment maps identities, updates access and handles the specific document formats and repositories you own. The public overview does not provide a complete deployable price, hosting commitment or every connector entitlement. Claims of always accurate answers or eliminated hallucinations are not an acceptance guarantee; keep citations and original-source access part of the employee workflow. Sinequa official source.
Elasticsearch
Elasticsearch supports keyword, vector and hybrid search with cloud and self-managed deployment options. It can power internal search through connectors and ingestion APIs, but it is a building platform rather than a preconfigured employee application. This is a reasonable alternative when engineering needs control over retrieval, UI and data processing, and is prepared to own the resulting service. Elasticsearch official source.
Check connector-level details before assuming source permissions carry through. Elastic's current connector reference lists document-level security support separately for each source, with version and deployment conditions. Several sources do not have that capability marked. The buying brief therefore needs both infrastructure/licensing and implementation effort for ingestion, authorization and the employee interface. Older Elastic Workplace Search documentation should not be used as a package description for this current Elasticsearch comparison. Elasticsearch official source.
Which purchase fits your operation?
Start with Microsoft Copilot Search when the eligible license and desired app experience already align. Compare Glean for a common search layer across supported workplace tools, Coveo for search inside existing employee destinations, and Sinequa for a broader enterprise knowledge program. Choose Elasticsearch when control of the application justifies dedicated engineering ownership; it is a different operating commitment from buying a finished search experience.
Ask every provider to scope the same set of high-value sources and explain the route from source identity to visible result, including access removal and stale-content handling. Compare the full human and automated workload, not an isolated seat or query rate. Search can make knowledge easier to find, but it does not repair an over-shared repository or turn a generated answer into an authoritative business record. Keep the underlying document and accountable owner within reach.
For related decisions, compare website search for public visitor discovery and employee intranets as a destination for internal knowledge.
By Toolverly Editorial, with AI-assisted research and drafting. Product information checked November 1, 2026.
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