No. 11 of 21 ·AI Database Assistants

Dataherald

Web · Self-hosted · API

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Freedom report

One barScore 5.3

Free tierNo free tier on record
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Dataherald is ranked #11 of 21 in AI database assistants on Freedom251. It runs on API, Self-hosted, Web.

Compared on AI database assistants

Deployment: self_hosted

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The record

Product: Dataherald is a natural language-to-SQL engine that exposes an API for asking questions about relational data in plain English.
Use cases: The project describes use cases including helping business users query a data warehouse, embedding data Q&A in SaaS products, and creating a ChatGPT plug-in from proprietary data.
Intended users: The official documentation is intended for developers who want to build natural language interfaces over structured data or contribute to the engine.
Database support: The quick start lists PostgreSQL, BigQuery, Databricks, and Snowflake as currently supported warehouse connections.
SQL generation: Included text-to-SQL implementations are LangChain SQL Agent, LangChain SQL Chain, LlamaIndex SQL Generator, and Dataherald SQL Agent.
Context: The context store can use business and database context, including validated question-and-SQL examples and table information, to help generate SQL.
Evaluation: The module overview says an evaluator assigns a confidence score to generated SQL.
Adaptability: The documentation describes a modular architecture whose implementations can be replaced through configuration in the .env file.
Security: The quick start says database connection data is encrypted before it is stored in Mongo, using the configured ENCRYPT_KEY.
Credentials: The quick start requires an OpenAI API key, an organization ID, and an encryption key before starting the engine.
Components: The repository describes an engine, an enterprise API layer with authentication and organizations, an admin console for configuration and observability, and a Slackbot.
Support and licensing: The repository is public and identifies its license as Apache-2.0; the README invites contributions to the project.

Where it ranks on Freedom251

Best AI Database Assistants in 2026#11 of 21
Best AI SQL Generators in 2026#10 of 19

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Sources

github.com/Dataherald/dataherald· checked 4 Oct 2026
dataherald.readthedocs.io/en/latest/· checked 4 Oct 2026
dataherald.readthedocs.io/en/latest/quickstart.html· checked 4 Oct 2026
dataherald.readthedocs.io/en/latest/text_to_sql_engine.html· checked 4 Oct 2026
dataherald.readthedocs.io/en/latest/context_store.html· checked 4 Oct 2026
dataherald.readthedocs.io/en/latest/modules.html· checked 4 Oct 2026