The quick read
- Use representative queries, including outdated documents and questions with no supported answer.
- Include connector maintenance, monitoring, evaluation and incident recovery in a build-versus-buy decision.
Define the required system
List source repositories, permissions, freshness needs and the questions users ask. A managed product may provide useful connections and operating support. A custom system may offer specific control while requiring engineering and maintenance.
Test the same evidence problem
Use representative queries, including outdated documents and questions with no supported answer. Inspect whether the right source is retrieved and whether access boundaries are preserved. Evaluate retrieval separately from the final generated prose.
Count the ongoing work
Include connector maintenance, monitoring, evaluation and incident recovery in a build-versus-buy decision. Review current Glean capabilities and the terms of any components in a custom stack. Choose the option your organisation can operate reliably. A prototype that answers ten questions is not yet a maintained knowledge service, and a purchased product still depends on the quality and ownership of the underlying documents.
Sources & notes
An editorial decision framework, not a scored benchmark or hands-on test.
glean.com — official reference
huggingface.co — official reference
Sources reviewed for the September 2026 launch edition.