# hashintel/hash

🚀  The open-source, multi-tenant platform for self-building knowledge graphs and simulation

Repository: https://github.com/hashintel/hash
Canonical: https://ross.abutalabs.com/products/hash
Homepage: https://hash.dev
Language: TypeScript
License: NOASSERTION
License Family: other
Topics: hash, rust, typescript, graph, ai, database, type-system, simulation
Last push: 2026-08-26T18:50:07+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 2606, "days_push": 7, "days_rel": 7, "gap_med": 0, "n_releases_24m": 34}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1649, forks 122 (observed 2026-08-28T04:05:16.690066+00:00)

## What it is
HASH is an open-source, multi-tenant platform for building self-maintaining knowledge graphs and process graphs, powered by the hgres graph engine, the SemType semantic type system, and the HashQL query language. It ingests structured and unstructured data into a bitemporal, provenance-aware graph, with AI agents that grow, check, and maintain the database, plus simulation tooling (Petrinaut) and a web UI for browsing entities and types.

## Use cases
- build a self-updating knowledge graph from documents and databases
- integrate and reconcile data from multiple sources into semantic entities
- model business processes and run simulations on a typed graph
- track when facts happened and when they became known (bitemporal data)
- let AI agents maintain and structure a shared source of truth
- browse and edit typed entities and schemas visually
- build decision-support tools on top of a provenance-aware graph

## When to choose
- you need a multi-temporal, provenance-aware graph as a source of truth
- you want AI agents to automatically ingest, reconcile, and maintain data
- you need semantic type contracts shared across systems and AI agents
- you want to model and simulate concurrent processes (Petri nets, world models)

## When to avoid
- you just need a simple relational or document database
- you want a lightweight embedded graph library rather than a full platform
- you need a mature, widely-adopted product with a large external contributor community
- you require a permissive standard open-source license (license is non-standard)

## Facets
- artifact type: application
- maturity: active
- function: database, type-system, search-engine, agent-framework, simulation, nlp, web-framework
- domain: databases, artificial-intelligence, simulation, self-hosted, developer-tools
- platform: self-hosted, rust, cross-platform
- tags: knowledge-graph, semantic-types, bitemporal, multi-tenant, process-graph, world-models, entity-extraction, data-integration, graph-engine, hashql, semtype, petri-net, decision-support, graph-processing, knowledge-graphs, data-engineering, web-server, typescript, docker

## Member repositories
- hashintel/hash (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:16.690066+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 2026-08-30T03:45:09.259124+00:00, confidence not recorded.
  - readme: https://github.com/hashintel/hash (fetched 2026-08-28T04:05:16.690066+00:00, sha 356b2423eb3e)
  - homepage: https://hash.dev (fetched 2026-08-29T11:18:38.001208+00:00, sha 5a02b810afb0)
  - site_page: https://hash.dev/docs (fetched 2026-08-29T11:18:38.010093+00:00, sha 27acd4e888ae)
  - site_page: https://hash.dev/docs/hgres (fetched 2026-08-29T11:18:38.012159+00:00, sha 75b2bfbc8797)
  - site_page: https://hash.dev/docs/semtype (fetched 2026-08-29T11:18:38.014823+00:00, sha 2b1eabb7c92e)
  - site_page: https://hash.dev/docs/petrinaut (fetched 2026-08-29T11:18:38.027089+00:00, sha 66f9be351392)
  - site_page: https://hash.dev/docs/brunch (fetched 2026-08-29T11:18:38.057558+00:00, sha 9eb0a5537b05)
  - site_page: https://hash.dev/docs/libs (fetched 2026-08-29T11:18:38.059592+00:00, sha 3b3d3e50c61e)
  - site_page: https://hash.dev/docs/contributing (fetched 2026-08-29T11:18:38.061597+00:00, sha c8bbdda79127)
- Data as of 2026-08-30T08:39:29.467469+00:00.