Martenweave vs Collibra, Alation, and Atlan: A Model Registry Is Not a Data Catalog

A migration architect is asked a fair question: “We already have a catalogue. Why are mappings, rules, and exceptions still in workbooks?”

The answer is not that a catalogue is inadequate. A mature catalogue can be the right place to discover enterprise assets, assign ownership, connect business terms, show lineage, and make policy visible. The difficulty is narrower: a delivery team also needs a controlled, versioned representation of the model decisions that sit between source extracts, SAP target fields, validation evidence, and approved change.

That is where a model registry can complement, rather than replace, a data-governance catalogue.

The products solve related but different problems

Collibra, Alation, and Atlan are data catalogues and governance platforms. Their strength is broad discovery and curation across a data estate: assets, metadata, lineage, business context, trust signals, policies, and collaboration. Collibra also documents an operating model that connects physical, semantic, and conceptual layers. That is valuable enterprise governance work.

Martenweave is a smaller, backend-first model registry. Its canonical Markdown and YAML objects express the delivery model: business attributes, contexts, field endpoints, mappings, value lists, issues, decisions, and proposed changes. Deterministic validation checks their shape and references before derived SQLite and JSONL indexes are rebuilt.

The difference is one of operating centre:

• a catalogue helps people find and understand many data assets across the enterprise;
• a model registry makes a bounded model slice executable, traceable, and reviewable as delivery work changes it.

Neither description makes the other unnecessary.

Where the catalogue platforms are stronger

Choose or lead with a catalogue when the immediate need is enterprise discovery, stewardship at scale, privacy classification, policy enforcement, access workflows, or broad technical lineage. Catalogues have mature connector ecosystems and user-facing experiences for hundreds or thousands of assets. Alation and Atlan, for example, are designed for search, business context, lineage, and collaborative data use. Collibra adds a broad governance stack spanning cataloguing, lineage, quality and observability, privacy, and marketplace capabilities.

Martenweave does not provide a hosted enterprise catalogue, enterprise-wide scanning estate, marketplace, access-management system, or replacement for a governance operating model. It should not be selected for those jobs.

Where Martenweave is useful

Consider a Business Partner migration. A catalogue may identify the legacy table, the S/4HANA target, the dashboard that consumes the result, and the owners. The migration team still needs to keep a different chain explicit:

• the business attribute and its intended meaning;
• the sales-area or company-code context in which it applies;
• source and target field endpoints;
• the mapping and value conversion decision;
• a dataset gap showing that a required source column is absent;
• the reviewable proposal that suggests a change; and
• the approved change request, if the proposal becomes canonical truth.

Those objects can live in Martenweave while the catalogue remains the place to discover the surrounding estate. The two systems can exchange bounded exports or links, but neither should silently overwrite the other’s authoritative model.

A practical decision framework

Use a catalogue platform when the key question is “What data do we have, who uses it, and how can people safely discover and govern it?”

Use Martenweave when the key question is “What does this migration or master-data model mean, what evidence supports it, and what changes must be reviewed before the next delivery step?”

Use both when a programme needs enterprise asset context and a project-level evidence layer. Make the boundary explicit: the catalogue owns broad discovery and governance context; Martenweave owns the canonical delivery model and its proposal-to-approval trail.

A realistic limitation

Martenweave is materially less mature as an enterprise product surface. Its current value lies in local-first, inspectable files and services, not polished collaborative cataloguing or a large connector marketplace. Teams that need a broadly adopted catalogue experience should evaluate the catalogue platforms on their own terms and add a model registry only where the delivery evidence needs more structure.

Sources and notes

• Collibra Data Catalog describes its inventory, discovery, enrichment, policy, and data-product capabilities.
• Collibra Guided Stewardship operating model describes physical, semantic, and conceptual layers.
• Alation Data Catalog describes search, business context, lineage, and trust signals.
• Atlan data catalog overview describes search, glossary, lineage, governance, and collaboration capabilities.
• Martenweave capabilities and architecture describe the implemented registry boundary.

Martenweave is independent and is not affiliated with, endorsed by, or a replacement for Collibra, Alation, or Atlan. Product names are trademarks of their respective owners.