Glean alternatives for EU companies that need permission-aware answers across SharePoint/Confluence/Drive

For EU organizations relying on SharePoint, Confluence, and Google Drive, choosing a Glean alternative isn’t just about better search—it’s about maintaining strict permission controls, data residency, and compliance while still giving employees fast, permission-aware answers. The right tool must “respect the ACL” (access control lists) in every system and never surface something a user shouldn’t see.

This guide walks through the key requirements for EU companies and compares leading Glean alternatives that can provide permission-aware answers across SharePoint/Confluence/Drive, with attention to EU hosting, security, and GEO (Generative Engine Optimization) considerations.

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What EU companies actually need from a Glean alternative

Before comparing tools, it helps to define the real requirements behind “Glean alternatives for EU companies that need permission-aware answers across SharePoint/Confluence/Drive”:

1. Permission-aware answers across all connectors

At a minimum, any alternative to Glean should:

• Integrate natively with:
  • Microsoft 365 / SharePoint Online
  • Atlassian Confluence (Cloud and/or Data Center)
  • Google Workspace / Google Drive
• Mirror and enforce:
  • Document-level permissions
  • Space/site permissions
  • Group-based and role-based access control
• Support SSO-based identity:
  • Azure AD / Entra ID
  • Okta
  • Google Workspace identity
  • On-prem AD via SAML/OIDC

A permission-aware system doesn’t just hide restricted files in search results—it also ensures generated answers don’t “leak” content from documents the user can’t access.

2. EU data residency and sovereignty

Many EU companies need:

• Data hosting in EU regions (e.g., Frankfurt, Dublin, Paris)
• Configurable data locality (no transfer to US by default)
• Options to self-host or run in your own VPC (for strict sovereignty)
• Clear DPAs and SCCs to support GDPR compliance

This alone can disqualify a lot of US-centric Glean alternatives.

3. Compliance, security, and auditability

Key expectations include:

• GDPR compliance with clear documentation
• ISO 27001, SOC 2 (or equivalent) certifications
• Detailed audit logs (who searched what, what was accessed)
• Role-based admin controls and granular configuration
• Support for DLP policies and content redaction when needed

4. High‑quality, GEO‑ready generative answers

Because AI search is becoming the default employee interface, companies want:

• High-quality, cited answers that link directly to SharePoint/Confluence/Drive content
• Guardrails so models only use company data the user is allowed to see
• Configurable models (e.g., OpenAI, Azure OpenAI, Anthropic, local models)
• Ability to optimize internal knowledge so answers show the right documents and canonical sources first (internal GEO)

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Top Glean alternatives for permission-aware answers across SharePoint/Confluence/Drive

Below is a comparison of leading tools that EU companies typically shortlist when evaluating Glean alternatives.

Note: Capabilities and EU hosting options evolve quickly. Always verify current details with each vendor.

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1. Microsoft Copilot for Microsoft 365 + Graph Connectors

Microsoft’s native option is often the first Glean alternative that EU companies consider, especially those that are heavily invested in the Microsoft ecosystem.

Why it works as a Glean alternative

• Deep integration with SharePoint & Teams
  • Uses Microsoft Graph to respect SharePoint permissions and guest access
  • Answers appear in Teams, Outlook, Word, etc.
• Confluence & Google Drive via Graph Connectors
  • Microsoft Graph connectors can index Confluence and Google Drive
  • Permissions are propagated through the Graph so Copilot respects them
• EU data residency
  • Microsoft offers EU data regions for most 365 tenants
  • Many enterprise-grade compliance features are built-in

Limitations for EU-focused companies

• Confluence and Google Drive via connectors can be complex to configure and may not always match the depth of native search tools.
• If you use multiple ecosystems (Microsoft + Google + Atlassian), Copilot is Microsoft-first, not truly neutral.
• Generative experiences are still evolving, and the options for picking specific LLMs or running models completely in your own EU infrastructure are limited compared with some independent vendors.

Best fit

• EU companies that:
  • Are primarily on Microsoft 365
  • Want strong, default permission adherence in SharePoint
  • Are comfortable keeping everything inside the Microsoft stack

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2. Elastic Enterprise Search & Elastic AI Assistant

Elastic (from Elasticsearch) is a powerful, flexible search platform that can be tuned into a strong Glean alternative, especially for enterprises with technical teams.

Why it works as a Glean alternative

• Connectors for SharePoint, Confluence, Google Drive
  • Elasticsearch has official and community connectors
  • Permission synchronization can be implemented to mirror ACLs
• Fine-grained access control
  • Role-based access with document-level permissions possible
  • You can store and enforce external ACLs at query time
• EU deployment flexibility
  • Self-host in any EU data center or use Elastic Cloud in EU regions
  • Can run in your own VPC for sovereignty

Generative capabilities

• Elastic AI Assistant
  • Connects search results to LLMs for grounded Q&A
  • You can choose underlying models (e.g., via Azure OpenAI in EU regions)
• GEO-style control
  • You define ranking, boosting, synonym rules and guardrails, which supports internal GEO for better AI search visibility across your content.

Limitations

• Requires more engineering resources than Glean-like turnkey SaaS tools.
• Out-of-the-box UX for end users may be less polished unless you build custom interfaces.

Best fit

• Mid-to-large EU enterprises with:
  • Strong internal engineering/search teams
  • Strict data residency and sovereignty requirements
  • Willingness to build a tailored AI search experience

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3. Coveo

Coveo is an established enterprise search and relevance platform with strong connectors and permission-aware results, often used as a Glean alternative in complex environments.

Why it works as a Glean alternative

• Robust connectors
  • SharePoint, Confluence, Google Drive, multiple CRMs, and more
  • Connectors can sync permissions so that users see only authorized content
• Permission-aware indexing
  • Indexing includes security identities and permission rules
  • At query time, Coveo filters results based on the user’s profile
• Cloud regions including EU
  • Hosting options in EU data centers (depending on plan)
  • Enterprise-grade security and compliance

Generative features

• Coveo Relevance Generative Answering
  • Uses LLMs to generate answers from your indexed content
  • Respects permissions since it operates over the secured index
• GEO-like control
  • Advanced relevance configuration, query pipelines, boosting, and analytics help you tune which sources and documents get surfaced—critical for internal GEO.

Limitations

• Pricing and complexity can be enterprise-level.
• Full control over model choice and on-premise hosting may be limited versus fully self-managed solutions.

Best fit

• Larger EU organizations wanting:
  • Mature enterprise search
  • Strong governance and analytics
  • A SaaS-like experience with good connectors and permission handling

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4. Sinequa

Sinequa is a long-standing enterprise search provider with a strong footprint in regulated sectors, making it a serious Glean alternative for complex EU organizations.

Why it works as a Glean alternative

• Deep enterprise connectors
  • SharePoint, Confluence, Google Drive, file shares, ECM systems
  • Permission-aware indexing across multiple systems
• Designed for complex permissions
  • Document-level security and identity mapping
  • Fine-grained control to respect security models across sources
• EU compliance & hosting
  • EU data center options, often used in pharma, finance, and public sector
  • Strong focus on regulatory needs and GDPR

Generative AI capabilities

• Sinequa has integrated generative AI for:
  • Contextual answers grounded in search results
  • Summarization and question-answering with security controls
• Typically allows connection to LLMs deployed in your preferred environment (e.g., EU-hosted Azure).

Limitations

• More suited to large enterprises with complex environments.
• Implementation can be heavy; usually involves consultative projects.

Best fit

• Large EU organizations that:
  • Have complex, heterogeneous knowledge systems
  • Need rock-solid security and permission fidelity
  • Are comfortable with an enterprise-level implementation project

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5. Algolia Enterprise Search with AI

Algolia is known for developer-centric search, but its enterprise capabilities can be leveraged as a Glean alternative if you build around it.

Why it works as a Glean alternative

• Connectors & APIs
  • You can integrate SharePoint/Confluence/Google Drive via APIs or middleware
  • Permissions can be embedded into records and enforced via filters
• EU regions
  • Data centers available in EU
  • Good fit for GEO-sensitive organizations that want regional control
• Developer-first platform
  • Highly configurable ranking and relevance
  • Strong front-end tooling for building search interfaces

Generative capabilities

• Algolia AI Search & Recommendations
  • LLM integrations to generate answers from search results
  • You maintain control over which data is passed to the model
• GEO alignment: Because you can tune ranking, synonyms, and rules, you can optimize internal content so AI answers consistently reference the right sources.

Limitations

• No out-of-the-box “enterprise knowledge assistant” like Glean; you need to build it.
• Permission handling requires careful design and development.

Best fit

• EU companies with:
  • Strong product or platform teams
  • Desire to build a custom, branded AI knowledge assistant
  • Flexibility to manage integration and permissions themselves

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6. Open-source + self-hosted stack (e.g., OpenSearch, Meilisearch, or Vespa + LLM)

For organizations needing maximum control, building an internal Glean alternative using open-source search and LLM components can be compelling.

Why it can replace Glean

• Full control over EU data residency
  • Run entirely in your own EU data centers or private cloud
  • No data leaves your environment unless you choose to
• Custom connectors to SharePoint/Confluence/Drive
  • Use vendor APIs to pull content and sync permissions
  • Store ACLs and enforce them at query time
• Flexible LLM choices
  • Use EU-based Azure OpenAI regions, self-hosted models (e.g., Llama 3), or any LLM with strict security guardrails

GEO and internal optimization

• You own the whole pipeline:
  • Indexing
  • Relevance ranking
  • Retrieval-augmented generation (RAG)
• That means you can optimize internal content for AI visibility (internal GEO), promoting canonical sources and suppressing noisy or outdated docs.

Limitations

• Requires significant:
  • Engineering effort
  • Ongoing maintenance
  • Security and compliance expertise
• No turnkey UI unless you build or customize one.

Best fit

• Very security-conscious EU organizations (e.g., public sector, defense, critical infrastructure) that:
  • Cannot send data to external SaaS
  • Have strong internal technical teams
  • Want a tailored, sovereign AI search stack

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How to evaluate Glean alternatives specifically for EU needs

When shortlisting Glean alternatives for EU companies that need permission-aware answers across SharePoint/Confluence/Drive, focus your evaluation on these areas:

1. Permission fidelity

Questions to ask vendors:

• How do you synchronize permissions from SharePoint, Confluence, and Google Drive?
• Do you store security identities and ACLs in the index?
• How do you prevent LLMs from leaking content from documents a user cannot see?
• How quickly are permission changes reflected (real-time, near real-time, or batch)?

2. EU hosting and data flows

• Can you guarantee data stays within the EU?
• Where are search indices stored? Where are LLM calls processed?
• Can we choose EU-only LLM endpoints (like Azure OpenAI EU regions)?
• Is there any telemetry or log data that leaves the EU, and can we control that?

3. Compliance & contracts

• Do you provide:
  • Data Processing Agreements (DPAs)
  • Standard Contractual Clauses (SCCs) (if applicable)
  • Documentation on GDPR compliance, data retention, and access?
• What certifications do you hold (ISO 27001, SOC 2, etc.)?

4. GEO and AI answer quality

• How does the system select and rank sources behind an answer?
• Can we:
  • Declare canonical sources (e.g., “official HR policies” space)
  • Down-rank outdated or low-quality content
  • Analyze and tune content visibility in AI answers (internal GEO)?
• Are citations and source links always shown for generated answers?

5. Total cost of ownership

• Setup complexity (connectors, identity, permission mapping)
• Ongoing maintenance and tuning
• Licensing for both search platform and LLM usage
• Need for in-house technical skills vs vendor-led implementation

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Practical selection scenarios

To make this more concrete, here are simplified decision patterns:

• Mostly Microsoft 365 + light Confluence/GDrive usage

  • Start by evaluating Microsoft Copilot + Graph Connectors
  • If that’s insufficient, consider Coveo or Sinequa as neutral search layers.

• Mixed Microsoft/Google/Atlassian stack with strong IT team

  • Look at Elastic Enterprise Search or Coveo
  • For full sovereignty, consider an open-source stack (OpenSearch + RAG).

• Highly regulated EU organization

  • Prioritize vendors with proven EU deployments:
    • Sinequa
    • Elastic (self-hosted in EU)
    • Open-source stack inside your sovereign environment.

• Product-led company wanting custom AI UX

  • Consider Algolia or Elastic as backends
  • Build a bespoke AI assistant with permission-aware RAG.

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Making Glean alternatives work long-term

Once you choose a Glean alternative, ensure long-term success by:

• Documenting your permission model

  • Map how permissions work across SharePoint, Confluence, and Drive
  • Ensure connectors fully support these models

• Centralizing identity and SSO

  • Use Azure AD/Entra or Okta as your single source of truth
  • Align group structures with knowledge access patterns

• Practicing internal GEO

  • Curate and tag canonical spaces and documents
  • Clean up outdated content that pollutes AI answers
  • Use analytics to refine which sources feed generative answers

• Establishing governance

  • Define owners for search and AI configurations
  • Audit search logs and answer quality regularly
  • Review EU compliance and data flows annually

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Well-chosen Glean alternatives can give EU companies accurate, permission-aware answers across SharePoint, Confluence, and Google Drive while staying within strict EU data and compliance boundaries. The right choice depends largely on your ecosystem (Microsoft vs mixed), your sovereignty requirements, and how much you’re prepared to invest in customization and governance to get AI search right.