Pangolin Scale is source-available (BSL) — it is not open source. The Business Source License 1.1 is not an OSI-approved open source license; the full terms are at mariadb.com/bsl11.
You are free to self-host Pangolin Scale, use it internally, modify the source, and build on top of it for essentially any purpose.
You may not offer Pangolin Scale itself, or a product derived from it, to third parties as a hosted or managed orchestration / agent-dispatch service. In plain terms: you can run it for yourself; you cannot productise it as a service you sell or provide to others.
On the Change Date (2030-06-01) each version of Pangolin Scale automatically converts to the Apache License, Version 2.0, which is a standard permissive open source license.
Policy note: the Change Date advances with major releases per BSL customary practice; the date stated in LICENSE is always the authoritative value (currently 2030-06-01, four years from first publish).
See the LICENSE file in this repository, which incorporates the Business Source License 1.1 by reference from mariadb.com/bsl11, together with the Parameters (Licensor, Licensed Work, Additional Use Grant, Change Date, and Change License) stated there.