Hasura

Generates a GraphQL API over existing databases, so the API is a projection of the schema rather than hand-written.

The API is derived, not maintained.

What it is sold for

Exposing an existing database as a governed API.

The rest of data, apis and backends, alphabetically. Sharing a category is a filing decision, not a relationship.

Agentset

Open-source retrieval infrastructure for question answering, with the pipeline exposed rather than hidden behind an endpoint.
Airtable

A relational database wearing a spreadsheet, with automations and an API on top.
Algolia

Hosted search built for typing latency, with ranking and synonyms as configuration rather than as code.
Apitable

An open-source visual database with automation, positioned against the closed spreadsheet-database products.
Appwrite

An open-source backend server bundling auth, databases, storage and functions behind one API.
Bytebase

Schema migration and change review for databases, with the same approval flow across twenty engines.
Cognee

Open-source memory for agents, combining graph, vector and relational retrieval so recall survives the session.
CrateDB

A distributed SQL database for time series and real-time analytics at volumes a single node cannot hold.

ImranTools[Hasura]