Microsoft OneLake + Atlan:
governance across your entire estate.
Atlan's deep integration with OneLake, Fabric, and the rest of the Microsoft data and AI suite extends governance across your entire estate. And as Microsoft retires Purview Data Governance, Atlan's Migration Studio continues the governance work your team built there.
“AI is only as trustworthy as the context behind it. Microsoft Fabric and OneLake provide a unified data foundation with governance in OneLake Catalog. Atlan's approach to metadata and governance helps customers extend trusted context beyond Fabric and across their entire data ecosystem.”
Partnering with Microsoft on the
new data governance strategy
Microsoft named Atlan one of four spotlight partners for Microsoft Fabric at FabCon Europe 2026.
Microsoft FabricEverything connected, everything in one place
A native Fabric connector brings lakehouses, warehouses, semantic models, and Power BI into Atlan, next to 120+ other sources, with column-level lineage across all of them.
OneLakeAnalytics on your governance
Query Atlan's context from Fabric Spark and Power BI to see which assets have no owner, no tags, or no description, through a OneLake shortcut in early access.
Teams and Copilot StudioContext in the tools you already use
The same certified context reaches your people in Teams and your agents in Copilot Studio.
Microsoft MarketplaceBuy through Microsoft Marketplace
Private offers on Microsoft Marketplace. Eligible purchases count toward your Microsoft Azure Consumption Commitment (MACC).
View Atlan on Microsoft Marketplace →
Visit the Atlan Trust Center →
How Microsoft OneLake and Atlan
work together
Atlan extends governance around OneLake to every source you run, with lineage and business metadata across your estate.
Scroll sideways to see the full diagram →
Start with OneLake catalog.
Add Atlan for the rest of your data estate.
| What you need | OneLake catalog | OneLake catalog + Atlan |
|---|---|---|
| Find and trust data | OneLake catalogFabric items with lineage, ownership, and endorsements, also inside Teams and Excel | OneLake catalog + AtlanPlus every system outside Fabric, in one search |
| Sources | OneLake catalogData in OneLake, including shortcuts and mirroring of external sources | OneLake catalog + AtlanPlus Snowflake, Databricks, SAP, Oracle, Teradata, Tableau, and more, cataloged where they run, in the cloud and on premises |
| Lineage | OneLake catalogLineage across Fabric items | OneLake catalog + AtlanColumn-level lineage from source systems through Fabric lakehouses, warehouses, Dataflows, and semantic models into Power BI reports |
| Your governance work | OneLake catalogA full set of governance features: • Domains for federated governance, with glossary, endorsements, and discovery • OneLake Govern insights and actions for admins and data owners • And many more | OneLake catalog + AtlanYour glossaries, governance domains, data products, and custom metadata, migrated after your approval |
| AI and agents | OneLake catalogCopilot and agents in Fabric | OneLake catalog + AtlanPlus Microsoft Copilot Studio and any MCP-capable agent, with governed definitions, owners, and lineage |
| Security and compliance | OneLake catalogMicrosoft Entra ID, OneLake security, network security, and Microsoft Purview Data Security | OneLake catalog + AtlanThe same. Atlan works alongside all of them, with Entra ID single sign-on. |
| How you buy | OneLake catalogIncluded with Fabric | OneLake catalog + AtlanThrough Microsoft Marketplace. Eligible purchases count toward your MACC. |
Atlan's Migration Studio keeps your
governance work alive
Purview's Data Map and Atlan both use the Apache Atlas type system, so your work carries across closely. You approve every step.
- Glossaries, categories, and termsWith synonyms, acronyms, related terms, status, resources, and the assets they describe
- Governance domains and sub-domainsAs Atlan domains and glossaries, so every term keeps its home
- Data productsWith their status, sensitivity, owners, assets, terms, and documentation links
- Custom attributesDefinitions and values, typed to match
- Critical data elements and objectivesCritical data elements as custom metadata, objectives as glossary terms with their key results
- Classifications on your assetsYour own and Microsoft's built-in ones, as Atlan tags
- Descriptions, display names, and ownersOwners matched by email, with experts and stewards recorded alongside them
- Where everything came fromEach migrated object records its Purview ID, URI, and collection
- Which glossaries, domains, products, and tags move
- Where each custom attribute lands in Atlan
- Which values winWhen a term, domain, or product with the same name already exists in Atlan
- Lineage you drew by handWritten where both ends are in Atlan
- Lineage crawled from your sources by Atlan's connectorsDown to columns where the source exposes them
- Assets and technical metadata, kept current
- Sources Atlan doesn't crawl yetCreated with their curation, which moves onto the crawled assets once Atlan connects the source
- Data quality rulesSet up again in Atlan with your team
- OneLake catalog and all its governance capabilitiesDiscovery, curation, governance, security, and Microsoft Purview Data Security integrations
- Sensitivity labels
- Data Loss Prevention
- Data Security Posture Management
- Audit
Migrate in 3 steps
Analyze
Grant two read-only roles. Atlan's Migration Studio extracts your estate and flags anything that would block the migration or drop data, plus every decision you need to make.
Review
Your governance lead decides where glossaries, domains, products, custom metadata, tags, and hand-drawn lineage land in Atlan. Nothing is written until you approve.
Move
Atlan's Migration Studio writes your governance into Atlan, validates it against the plan, then enriches your crawled assets. Rerun it for a fresh snapshot while both systems run.
What you can check at every step
- Purview Data Governance stays untouchedAtlan reads with read-only access and writes nothing back.
- An analysis reportWhat carries across, what needs a decision, and anything that would drop data, before anything moves.
- A validation reportWhat you planned next to what landed in Atlan: object counts, coverage for each glossary, tags, and custom metadata.
- Every object traced backEach migrated object records where it came from in Purview Data Governance.
- Run both side by sideKeep Purview Data Governance running until you're ready. Each new run adds what's new without duplicating what already landed.
Start with an assessment
Atlan reads your Purview Data Governance with read-only access and gives you a plain-English report of what carries across and where your team will decide, plus a dated plan for your migration.
A leader across every context category
“The Metadata Lakehouse forms the core foundation, built on an open and highly performant architecture. It is designed to be Iceberg-native and includes a knowledge graph for business domains, vector storage, and analytics, which is purpose-built for AI.”
Leader in the 2025 Gartner® Magic Quadrant™ for Metadata Management Solutions
“Atlan stands out in AI-native governance through context-based partnerships, agentic stewardship and orchestration of enterprise agentic systems. They take a partnership and co-innovation based approach, which is reflected in their App Framework as a marketplace for context.”
Leader in the 2026 Gartner® Magic Quadrant™ for Data & Analytics Governance
A Leader and a Customer Favourite in the Forrester Wave™
Data & Analytics Governance Solutions and Enterprise Data Catalogs
Frequently asked questions
Microsoft has announced a new data governance strategy, built on Microsoft OneLake. Governance moves into the data platform, and the OneLake catalog becomes the foundation for discovering, governing, and securing data in Microsoft Fabric. As part of that strategy, Purview Data Governance, including Microsoft Purview Unified Catalog, Data Map, and classic Azure Purview, reaches end of support on November 12, 2027. Microsoft Purview Data Security and Compliance is not affected.
The OneLake catalog comes with Fabric and governs your Fabric items, so if your data lives almost entirely in Fabric, it may be all you need. Atlan is for teams whose data goes further: sources outside Fabric governed where they run, column-level lineage across all of them, the work you built in Purview Data Governance moved by Atlan's Migration Studio, and governed context for Copilot Studio and any MCP agent. Read how governance works in the OneLake catalog on Microsoft Learn.
Atlan connects to 120+ data sources across clouds and on premises, including Snowflake, Databricks, SAP, Oracle, Teradata, and Tableau. See Atlan's connectors.
Atlan traces lineage down to columns, including lineage mined from query logs, from your source systems through Fabric into Power BI reports, and across the rest of your estate. Read about lineage in Atlan.
Atlan runs on Microsoft Azure and works whether or not you're on Fabric yet. Add the OneLake catalog as you adopt Fabric; a Fabric trial is a good place to start.
They stay with Microsoft Purview Data Security and Compliance. Classifications on your assets, both your own and Microsoft's built-in ones, carry across as Atlan tags.
It depends on the size of your governance and how many sources you connect. Your assessment sizes the work and gives you a dated plan, with a completion date ahead of November 12, 2027.
Buy Atlan on Microsoft Marketplace with a private offer. Eligible purchases count toward your Microsoft Azure Consumption Commitment, so you can fund the migration from a commitment you've already made. Your assessment includes a quote.
Yes. Atlan is built on open foundations. Atlan's Context Lakehouse keeps your metadata in open Apache Iceberg tables that any Iceberg-compatible engine can query, including Microsoft Fabric through a OneLake shortcut. Atlan's APIs and SDKs give you programmatic access to all of it.
Yes, through Atlan's MCP server. Other AI tools that support MCP can use it too.
Bring your governance with you
on Atlan and OneLake.
