Bonnard is an open-source semantic layer that sits between your data warehouse and every data consumer. Define business metrics in YAML, version them in Git, and deploy as an API. AI agents query governed metric definitions via MCP (Model Context Protocol) instead of writing raw SQL. Built-in multi-tenant row-level security, pre-aggregation for sub-second responses, and support for Snowflake, BigQuery, Databricks, PostgreSQL, ClickHouse, DuckDB, and Redshift.
