About D4L

D4L is operated by Deasil Works, Inc., a senior engineering practice that has been integrating, hosting, and operating production data systems since 1996. The same principals. The same bench.

We picked open source in the late nineties (Postgres, Apache, Linux on commodity hardware in our own cabinets) because the alternative at the time was Sun, Oracle, and a per-CPU license that punished growth. We never had to switch our minds. The hyperscalers came and went; the OSS projects we standardized on then are still the load-bearing components of the data systems we ship today, and the new ones (Trino, Iceberg, OpenSearch, Valkey) are still arriving permissively-licensed.

D4L is what that conviction looks like as a service. Customers bring us a workload (a Snowflake bill, a Tableau renewal, a vector-DB experiment, an Airflow cluster nobody wants to babysit) and we operate the open-source equivalent on bare metal we own across six U.S. facilities. Fixed monthly billing. Standard protocols on every interface. The pipeline files, the dashboards, the SQL belong to the customer. Moving D4L off our iron and onto someone else's is a configuration change, not a migration project.

The sister sites in the Deasil family (deasil.works, plexara.io, txn2.com) share the same hardware footprint, the same operations team, and the same posture toward licensing. Each one is the same thesis applied to a different layer.

Send us your last invoice from the SaaS you wish you weren't paying. We'll come back with a hardware spec, an OSS replacement plan, and a fixed monthly number.