# finos/legend

The Legend project

Repository: https://github.com/finos/legend
Canonical: https://ross.abutalabs.com/products/finos-legend
Homepage: https://legend.finos.org
Language: HTML
License: Apache-2.0
License Family: permissive
Topics: goldman-sachs, modeling, legend
Last push: 2026-08-24T06:16:51+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 2456, "days_push": 9, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1543, forks 263 (observed 2026-08-28T04:05:01.232643+00:00)

## What it is
Legend is an end-to-end data platform from FINOS (originated at Goldman Sachs) covering the full data lifecycle: modeling, curation, querying, governance, and sharing. It includes Legend Studio (a visual data modeling editor), Legend Query (drag-and-drop self-service querying), an execution engine, and code translation to JSON Schema, Protobuf, and AVRO.

## Use cases
- build governed data models with a visual editor
- let business users query data without SQL
- generate APIs from data models
- translate data models to JSON Schema, Protobuf, or Avro
- track data lineage and provenance
- break down data silos between business and engineering teams

## When to choose
- you need a governed, self-service data platform with shared business vocabularies
- you want to bridge data modeling between business and engineering teams
- you need model-to-schema interoperability across systems
- you want lineage and entitlement-aware data access built in

## When to avoid
- you need a lightweight single-purpose ETL or query tool
- your team cannot operate a multi-component platform (Studio, Engine, SDLC, Depot)
- you only need ad-hoc analytics without formal data modeling

## Facets
- artifact type: application
- maturity: active
- function: data-science, etl, api-framework, search-engine, documentation, serialization
- domain: data-science, databases, apis, developer-tools
- platform: self-hosted, cloud, jvm
- tags: data-modeling, data-governance, data-platform, data-catalog, legend-pure, fintech, metadata-management, data-engineering, web-server, docker

## Member repositories
- finos/legend (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:01.232643+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T04:30:41.231751+00:00, confidence not recorded.
  - readme: https://github.com/finos/legend (fetched 2026-08-28T04:05:01.232643+00:00, sha acb51b4c6b63)
  - homepage: https://legend.finos.org (fetched 2026-08-29T11:31:56.441148+00:00, sha dbb22628ebd9)
  - site_page: https://legend.finos.org/docs/overview/legend-overview (fetched 2026-08-29T11:31:56.450492+00:00, sha 232e74a33a8e)
- Data as of 2026-08-30T08:39:29.467469+00:00.