Simple, Transparent Licensing

Open-source core. Free-to-use extensions. No hidden fees.

Apache 2.0

Core

Free & Open Source

SQL engine, REPL, Elasticsearch client abstractions, and cross-version GatewayApi.

  • ✓ Full SQL parser (DDL + DML + DQL)
  • ✓ Interactive REPL client
  • ✓ GatewayApi (ES 6, 7, 8, 9)
  • ✓ COPY INTO FROM
  • ✓ Scala 2.12 / 2.13 cross-compiled
  • ✓ Community support
Get Started on GitHub
Elastic v2

Extensions

Free to Use

Enterprise integrations — JDBC driver, Arrow Flight SQL, ADBC, and Materialized Views.

  • ✓ JDBC Type 4 Driver
  • ✓ Arrow Flight SQL Server
  • ✓ ADBC Driver
  • ✓ Materialized Views
  • ✓ SPI Extensions
  • ✓ BI tool integration support
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Frequently Asked Questions

Do I need an Elasticsearch license to use SoftClient4ES?

No. The core SQL engine and REPL work with any ES deployment, including the free/basic tier. Materialized Views use enrich policies internally — automatic refresh requires an ES license, but manual REFRESH MATERIALIZED VIEW does not.

What does the Elastic v2 license mean for extensions?

The Elastic v2 license allows free use, including in production. The sources are not publicly available. The main restriction is that you cannot offer the extensions as a managed service (SaaS) to third parties.

Can I use SoftClient4ES in production?

Yes. Both the core (Apache 2.0) and extensions (Elastic v2) are production-ready. The project supports ES 6.x, 7.x, 8.x, and 9.x.