As of 2026, there is a consistent analytics stack being deployed across leading AI model labs that consists of:
- Apache Kafka for streaming data ingestion (from inferencing sessions?)
- Apache Flink to automatically transform data streams into tabular data
- Apache Iceberg (Parquet and object) as the tabular format
- Apache Spark for data transformation
- Airflow for data pipeline orchestration
- Trino for interactive and ad-hoc data exploration
Based on data platform jobs,
| Software | Role in stack | Named by OpenAI | Named by Anthropic | Named by xAI | Named by TML | Named by Together |
|---|---|---|---|---|---|---|
| Spark | Large-scale batch ETL, training data pipelines, data lake writes | Yes | Yes | Yes | Yes | Yes |
| Ray | Distributed Python compute; data processing + ML workloads on same cluster | No | No | No | Yes | No |
| Beam | Unified batch + streaming pipelines; portable across runners | No | No | No | Yes | No |
| Kafka | High-throughput event streaming backbone; decouples producers from consumers | Yes | Yes | Yes | Yes | Yes |
| Flink | Stateful stream processing; transforms event streams into aggregates or tables | Yes | Yes | Yes | No | Yes |
| Airflow | DAG-based workflow scheduler; sequences pipeline steps, manages dependencies | Yes | Yes | No | No | Yes |
| Iceberg | Open table format on object storage; schema evolution, time travel, ACID | Yes | No | No | No | No |
| Delta Lake | Open table format on object storage; similar to Iceberg, strong Spark integration | Yes | No | No | Yes | No |
| Parquet | Columnar file format; the physical storage layer under Iceberg/Delta | No | Yes | No | No | No |
| Trino | Interactive SQL over data lakes; ad-hoc queries without moving data | Yes | No | Yes | No | Yes |
| DuckDB | Embedded OLAP engine; fast columnar queries in-process, no cluster needed | No | Yes | No | No | No |
| Snowflake | Managed data warehouse; named as comparable alternative at Anthropic | No | Yes | No | No | Yes |
| ClickHouse | Columnar OLAP DB; sub-second queries on event/telemetry data at high ingest rates | No | No | Yes | No | Yes |
| dbt | SQL-based transformation layer; turns raw warehouse data into clean analytics models | No | Yes | No | No | Yes |
| Chronon | Feature platform; computes ML features consistently across training and serving | Yes | No | No | No | No |