Glean vs Coveo vs Microsoft 365 Copilot Search: Real Enterprise AI Search Cost per Employee in 2026

The short answer: two of these three vendors do not publish a price at all, and the third is an add-on that assumes you are already paying for something else. Glean and Coveo are both fully custom-quoted, with no public pricing page and no self-serve tier for either. Buyer-reported estimates put Glean at roughly $50–$75 per user per month, with a 100-seat minimum contract, meaning even a 100-employee company faces a reported $60,000–$90,000 annual floor. Coveo's pricing has no usable public estimate at all in the sources reviewed — not even a buyer-reported range — so this article marks it QUOTE-ONLY / UNKNOWN rather than inventing one. Microsoft 365 Copilot's search capability is the one number that is actually published: $30 per user per month, but only as an add-on requiring an existing qualifying Microsoft 365 license the $30 figure does not include.

What each vendor bills

Glean (REPORTED, no official price list; buyer-reported figures from G2, TrustRadius, Gartner Peer Insights, and procurement evaluations). Glean.com has no public pricing page, and every deal is custom-quoted, gated behind evaluation processes that typically require a 100-seat minimum before pricing conversations even begin. Buyer-reported estimates cluster around $50 per user per month, with some prospects reporting figures closer to $75; the model scales with total licensed seats, not active usage, so an organization pays for every seat provisioned regardless of how many employees actually use the product. Large enterprise deployments were reported to exceed $240,000 annually in some cases. Total cost of ownership, once cloud hosting, indexing infrastructure, and administrative overhead are factored in on top of the base per-seat license, was reported to run two to three times the base licensing figure — meaning the $50–75/user headline may understate the real per-employee cost by a wide margin once a deployment is fully accounted for.

Coveo (QUOTE-ONLY / UNKNOWN). No public pricing page, no self-serve tier, and — unlike Glean — no buyer-reported dollar range was found in the sources reviewed for this article. Every pricing comparison table checked lists Coveo simply as "Custom" with no further figure. This article does not estimate a Coveo price; doing so without any sourced anchor would be inventing a number the vendor has never disclosed and no buyer has publicly reported.

Microsoft 365 Copilot Search (OFFICIAL, Microsoft's published pricing). $30 per user per month, sold as an add-on to an existing, separately-billed Microsoft 365 license (typically E3 or E5 tier, which is not included in the $30 figure and carries its own per-user monthly cost). Copilot's enterprise search and "Work" capability draws on the same Microsoft Graph permissions and connectors already governing a tenant's SharePoint, Exchange, and Teams content, so an organization already on a qualifying M365 tier faces the smallest incremental licensing decision of the three vendors here — but the $30 add-on price is not a standalone enterprise-search product price; it assumes the base M365 subscription cost as a prerequisite this article does not add in, since that base cost varies by which M365 tier and features an organization already holds.

Annual cost by company size

Formula: Glean = max(100, employees) × $50–$75 × 12 (the 100-seat minimum applies even to smaller headcounts); Copilot Search = employees × $30 × 12, add-on cost only, excluding the underlying M365 subscription; Coveo = QUOTE-ONLY / UNKNOWN at every scale.

At every company size in this table, Copilot's add-on-only price is roughly 40–60% of Glean's reported range — but this is not a fair like-for-like comparison, since Copilot's figure excludes the base M365 license it depends on, while Glean's figure is a standalone product price with no equivalent prerequisite.

Effective cost per employee

Formula: annual cost ÷ employees. At 2,000 employees: Glean is $600–$900 per employee per year; Copilot's add-on is $360 per employee per year. Neither figure changes meaningfully with company size on a per-employee basis (both are flat per-seat rates), except that Glean's 100-seat minimum makes very small organizations pay a higher effective per-employee rate than the headline $50–75/user suggests, since the minimum enforces a seat count above actual headcount for the smallest buyers.

The M365 prerequisite cost Copilot's headline doesn't show

A fair comparison to Glean requires adding Copilot's underlying M365 license cost, which varies by tier and by what an organization already holds. If a company must add a new M365 E3-class license specifically to unlock Copilot Search — rather than already holding one for other reasons — the real incremental cost of "Copilot Search" is the $30 add-on plus that base license, which can meaningfully close the gap with Glean's reported range or exceed it, depending on the specific M365 tier required. This article does not have a confirmed, current M365 E3/E5 per-user rate to add in precisely (QUOTE-ONLY / UNKNOWN for the exact current tier price at the time of this comparison), so treat the $30/user/month figure as a floor for organizations not already fully licensed, not a complete standalone price.

What "custom pricing" costs you before you even see a number

Both Glean and Coveo require a sales engagement before any pricing is disclosed, and Glean specifically requires committing to a 100-seat evaluation minimum before a quote is even produced — a structural cost in sales-cycle time and internal buy-in effort that a self-serve, published-price competitor does not impose. This is not a dollar figure this article can quantify, but it is a real procurement cost: teams report it can take a lengthy, multi-stakeholder sales cycle to reach a number for either vendor, versus checking Microsoft's published $30/user/month rate directly.

Sensitivity

1. Which Glean rate is real. The $50 versus $75 per-user range is itself unconfirmed by Glean, sourced only from buyer reports; actual negotiated rates likely vary further by company size and competitive pressure.
2. TCO multiplier on Glean. The reported 2–3x total-cost-of-ownership factor over the base license, once infrastructure and admin overhead are included, is the single largest unmodeled cost risk in this article.
3. Which M365 tier is the Copilot prerequisite. E3 versus E5 licensing carries a substantial cost difference, and an organization not already on a qualifying tier faces a meaningfully larger total cost than the $30 add-on alone suggests.
4. Coveo's complete absence of a public price signal. Any number attributed to Coveo without a direct quote would be invented; budget only after a real sales conversation.

Budgeting traps

• Treating Glean's $50–75/user headline as the full cost. Reported TCO once infrastructure and admin overhead are included runs 2–3 times that base figure.
• Comparing Copilot's $30 add-on price directly against Glean's standalone price. Copilot assumes an existing M365 subscription Glean does not require.
• Assuming Coveo's pricing resembles Glean's or any other enterprise search vendor's. No sourced buyer-reported range exists to anchor even a rough estimate.
• Underestimating Glean's 100-seat minimum for smaller organizations. A 40-employee company evaluating Glean still faces pricing anchored to 100 seats.

What to ask before you buy

Ask Glean directly for its current per-seat rate and whether the 100-seat minimum applies to your organization's actual headcount, and separately ask for a fully loaded TCO estimate including infrastructure and administrative overhead, not just the base license. For Microsoft 365 Copilot, confirm which M365 tier is required to unlock Copilot Search and add that tier's per-user cost to the $30 add-on before comparing it to a standalone enterprise search product's price.