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Trino is pretty good (open source presto).

Common opensource options (other than Spark and Flink): 1. Dremio: https://www.dremio.com/ 2. Trino: https://trino.io/ 3. Iceberg Java API: https://iceberg.apache.org/docs/1.6.1/api/

Starburst (full disclosure: I work there) provides a query engine (trino under the hood) with Iceberg support [1] -- worth checking out.

[1] https://www.starburst.io/platform/icehouse/

right now, starrocks or trino are likely your best options, but all the major query engines (clickhouse, snowflake, databricks, even duckdb) are improving their support too.

Why away from bigquery? Just wondering if it’s a cost thing.

Yes, mainly driven by cost. BigQuery is really unpredictable when dashboards with filters are being used intensively by users. We don’t want to limit our users in their data exploration.