4 Best European Glean Alternatives in 2026
The best European alternative to Glean in 2026 is Elium, based in Belgium. All 4 options below are European-owned, GDPR-native and ranked by feature parity and relevance.
By the EU Alternatives team Last updated
Our top pick this year is Elium, but every option on this list is European-owned, GDPR-native, and production-ready. Worth a closer look: LightOn, Aleph Alpha, Seef.
Glean alternatives are mainly AI & Machine Learning and Developer Tools. Browse any of those categories for a wider shortlist beyond this list.
Top European Glean alternatives compared
| # | Alternative | Country | Open source | Free tier | Compare |
|---|---|---|---|---|---|
| 1 | Elium | Belgium | No | No | vs Glean → |
| 2 | LightOn | France | No | Yes | vs Glean → |
| 3 | Aleph Alpha | Germany | No | No | vs Glean → |
| 4 | Seef | Netherlands | No | No | — |
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Governed knowledge base with AI import, AI search, expiry reminders for stale content and permission-aware delivery to Teams, ServiceNow and AI agents.
Elium turns scattered procedures, policies and runbooks into one governed source of truth for the whole company. Content has owners, gets flagged when it goes stale, and is routed back for verification, so teams and their AI tools work from knowledge that is actually current.
Existing documents come in through AI import from SharePoint, Google Drive, Confluence, Notion or plain Markdown. Answers then reach people where they already work, in the web app, on mobile, in Microsoft Teams, Zendesk and ServiceNow, and reach AI agents through MCP, REST and API access that respects each user's permissions.
Key benefits:
- Expiration management flagging outdated pages and sending them to their owners
- AI search answering questions from verified company content
- Permission-aware AI so agents only see what the asking user may see
- AI import converting legacy documents into structured, maintainable articles
- Wide integrations with more than 30 tools including Teams, Slack, Jira and Salesforce
- Flexible deployment as SaaS, private cloud or on-premise for enterprise customers
Elium is built by Whatever SA, an independent company founded in 2007 in Walloon Brabant, Belgium, with a second office near Paris. It holds ISO/IEC 27001:2022 certification and processes data under GDPR. Standard SaaS data stays in the EU on Google Cloud's Belgian region, while customers who want to avoid US-owned infrastructure can choose hosting in France on 3DS Outscale, which is SecNumCloud-qualified. Customer content is never used to train models.
More than 150,000 people across 150+ organisations use Elium, including L'Oréal, BNP Paribas, VINCI Energies, SNCF and the Council of Europe.
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Enterprise generative AI platform with grounded retrieval, document parsing, structured extraction, and deployment from EU cloud to fully on-premise.
LightOn is a French enterprise AI platform and Europe's first publicly listed pure-play generative AI company, trading on Euronext Growth Paris since November 2024. Where consumer chatbots stop, LightOn starts: grounded retrieval with citations, document parsing that turns scans and handwriting into structured Markdown, and schema-based extraction, all built for regulated organizations.
Deployment flexibility is the differentiator: run it as SaaS on EU sovereign hosting, in a dedicated cloud, inside your VPC, or fully on-premise where no token ever leaves your infrastructure. Enterprise controls include SSO, RBAC, SCIM provisioning, workspace ACLs for agents, and audit logs, with SecNumCloud compliance available for the most sensitive French deployments.
Key features:
- Grounded retrieval with citations, combining dense and sparse search
- Document parsing for scans, tables, handwriting, and complex layouts
- Structured extraction driven by JSON schemas with async webhooks
- Deployment anywhere from EU SaaS to air-gapped on-premise
- Enterprise security with SSO, RBAC, SCIM, and audit logs
- Free starter tier with pure usage-based pricing, no commitment
- GDPR, SOC 2, and AI Act-ready posture stated across the platform
LightOn SA is headquartered in Paris, France, founded in 2016, and serves Safran, Région Île-de-France, and the French tax authority among others, with partnerships including Orange Business and HPE.
Ideal for European enterprises and public bodies that want ChatGPT-class capability on infrastructure their regulators will accept.
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Sovereign enterprise large language models with explainable answers, multilingual support, and on-premise or EU data-centre deployment for regulated organizations.
Aleph Alpha is a German enterprise AI company from Heidelberg building sovereign large language models for governments and regulated industries that cannot send their data to US clouds. Its PhariaAI platform is designed to be deployed inside an organization's own infrastructure, with a focus on transparency and traceability rather than a black-box chatbot.
Where consumer AI hides its reasoning, Aleph Alpha emphasizes explainability, letting operators trace which sources informed an answer, a requirement for public-sector and compliance use. The stack runs on-premise or in sovereign European data centers, supports multiple European languages natively, and is built to satisfy the EU AI Act.
Key features:
- Sovereign LLMs deployable on-premise or in EU data centers
- Explainability tools that trace answers back to their sources
- Multilingual strength across European languages
- On-premise deployment keeping sensitive data inside your walls
- Enterprise integration for retrieval over private document sets
- EU AI Act alignment for regulated and public-sector use
Aleph Alpha is developed by Aleph Alpha GmbH in Heidelberg, Germany, backed by major European investors and positioned as the continent's answer to OpenAI and Anthropic for sovereignty-critical deployments. Its customers are governments, defense, and enterprises that treat data residency as non-negotiable.
Ideal for European public bodies and regulated enterprises that need generative AI they can run and audit on their own infrastructure.
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Company knowledge assistant with cited answers, Google Drive and SharePoint connectors, per-customer isolated instances and a choice of language models.
Seef gives a company an AI assistant that answers from its own documents, not from the open web. Staff ask questions in plain language and every answer cites the source document it came from, so people can check the passage instead of trusting a confident paragraph.
Seef connects to Google Drive and SharePoint and indexes what is already there. Each customer gets a single-tenant instance in a cloud project of its own, with its own database, file storage and search index. Administrators decide which language models the instance may use, including models from OpenAI, Anthropic, Google, DeepSeek and Qwen, and a model only receives a prompt when someone asks a question.
Key benefits:
- Cited answers linking each reply back to the document it was drawn from
- Isolated instance so no other customer's data shares your cloud project
- Model choice letting the organisation approve, switch or block individual models
- Existing sources with connectors for Google Drive and SharePoint
- Team chat for sharing conversations and workflows with colleagues
- Web search control deciding whether the assistant may look outside your documents
Seef is operated by Timformatie B.V. in Rotterdam, the Netherlands, which is certified to ISO 27001:2022 and NEN 7510-1:2024, the Dutch standard for information security in healthcare. Customer instances run on Google Cloud in its Belgian region (europe-west1). Questions are answered by the model providers the customer approves, which are currently non-European, so the stored knowledge stays in the EU while individual prompts go to the chosen provider's API.
Ideal for Dutch healthcare and knowledge-heavy organisations that want a Copilot-style assistant over their own files with an audited security setup.
