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    L1 + L6 ENTERPRISE STACKApril 2026· 8 min

    Glean at $7.2B: The Enterprise Memory Layer Microsoft Was Supposed to Own

    Glean logoGlean
    L1L6L8
    Verdict: L1c + L6d + L8d stack

    Glean Valuation

    Peak

    $2.2B (2024)

    Now

    $7.2B (2025)

    +227%

    Layer Scoring

    L-1
    Resources
    L0
    Infra
    L1
    Data
    L2
    Models
    L3
    Gates
    L4
    Access
    L5
    Execution
    L6
    Orchestration
    L7
    Surface
    L8
    Memory

    Enterprise search has been a difficult category for two decades. Glean is winning because it stopped selling search and started selling the enterprise's L8 memory layer.

    The structural stack:
    • L1: Per-customer, per-tenant index of every connected app, Slack, Gmail, Notion, Jira, Salesforce, Drive, Confluence, GitHub. Proprietary to each customer; not reproducible by a vendor.
    • L6: Permission-aware orchestration that respects every source system's ACLs. Hard. Defensible.
    • L8: A live memory of how this specific organization works, who knows what, what was decided when, what's the latest version.

    Why Microsoft Copilot hasn't displaced this. Copilot is excellent inside the Microsoft 365 perimeter. Most enterprises live in 50+ apps, most of which are not Microsoft. Glean's neutrality across SaaS is itself a moat.

    Law III, value migrates to the scarcest layer. A general LLM is cheap. The org's answer to "what did we decide about X last quarter" lives in nine systems, behind seven permission models, and nowhere else. Whoever assembles that into a single L8 wins the enterprise assistant market.

    The Cube projection: TALL (3 layers), WIDE (cross-vertical), DEEP (every knowledge-worker function). Vertically-stacked archetype, software flavor.

    Public reporting; valuations as disclosed.

    What This Means for You

    Product Leader

    Map your product to the layers it actually owns vs. rents. The rented ones are where the counter-move work belongs.

    Investor

    Underwrite layer ownership, not feature count. The Cube footprint is the moat.

    Operator

    Audit your stack against Supply Chain of Intelligence. Anything sitting only at L7 is the layer to watch.

    AA

    Anand Arivukkarasu

    Ex-Meta product leader. Creator of Supply Chain of Intelligence™. Writes about where AI value accrues, and who can fire your product. LinkedIn

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    Worth sharing? Pull-quote: "L1c + L6d + L8d stack"