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Highlights from Clojure/Conj 2025: production lessons from Netflix and Nubank, the Amazing Day of Datomic workshop, and fresh Datomic tooling, with talk transcripts.

Announcing a hands-on Datomic workshop at Clojure/Conj 2024: a refreshed take on the classic Day of Datomic, covering fundamentals through intermediate use.

Today, Jepsen released their analysis of Datomic’s safety and correctness.

Datomic Local is a lightweight, embeddable, redistributable build of Datomic supporting the Client API, ideal for single-process apps, local dev, and testing. Released under Apache 2.0.

Datomic Cloud is now free of licensing fees, with its binaries released under the Apache 2.0 license.

Nubank is making all editions of Datomic free of licensing fees, released under Apache 2.0 and available directly from Maven Central, no signup required.

Datomic Pro adds implicit partitions: 524,288 integer-identified partitions usable without an installation step, enabling algorithmic data-locality strategies.

Today's release of Datomic On-Prem, and coming soon in Cloud, includes a new feature that gives users visibility into the decisions made by the query engine while it processed your query.

Datomic Cloud 884-9095 is a major release: more compute and memory instance options, lower pricing at all scales, and API Gateway automation for ions and clients.