Copyright (c) 2010-2026 Haifeng Li. All rights reserved.

SMILE employs a modern multi-product licensing model designed to support
free academic and open-source collaboration while offering commercial licensing
and enterprise support for proprietary and mission-critical deployments.

SMILE is organized into distinct components governed by the following terms:

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1. SMILE Libraries & Core Algorithms (Dual License: GPLv3 / Commercial)
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The core mathematical and machine learning libraries (including `base`, `core`,
`nlp`, `deep`, `plot`, `kotlin`, and related modules) are dual-licensed under:

  a) GNU General Public License version 3 (GPLv3):
     You may use, copy, modify, and distribute the software under the terms
     of the GPLv3 as published by the Free Software Foundation.

  b) Commercial / OEM License:
     If you use SMILE libraries in proprietary applications, internal enterprise
     services, SaaS backends, or commercial products without disclosing your
     source code under GPLv3, you must obtain a commercial license from
     HALO.AI, LLC.

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2. SMILE Serve (Dual License: AGPLv3 / Commercial Enterprise)
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SMILE Serve (`serve`) is the high-throughput, low-latency JVM inference platform
and model serving runtime, dual-licensed under:

  a) GNU Affero General Public License version 3 (AGPLv3):
     Free for open-source systems and applications where the surrounding network
     service and infrastructure are disclosed under AGPLv3. In accordance
     with Section 13 of the AGPLv3, if you modify the software or incorporate
     it into a service accessible over a computer network (e.g., SaaS, cloud APIs,
     or internal microservices), you must make the complete corresponding source
     code available to all network users under the AGPLv3.
     Learn more: https://www.gnu.org/licenses/agpl-3.0.html

  b) Commercial Enterprise Runtime License:
     Enterprises deploying SMILE Serve in production microservices, high-volume
     streaming architectures (Kafka/Flink), or cloud clusters without AGPLv3
     disclosure requirements must obtain an Enterprise Runtime License.
     Enterprise licenses include high-availability clustering, zero-GC optimizations,
     dedicated SLAs, CVE hotfix guarantees, and legal indemnification.

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3. SMILE Studio (Business Source License 1.1 / Commercial)
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SMILE Studio (`studio`) is an agentic data science desktop IDE and model-packaging
environment licensed under the Business Source License 1.1 (BSL 1.1).

  - Use Grant: You may use SMILE Studio free of charge for non-commercial
    evaluation, personal learning, academic research, data exploration, and
    exporting serialized model packages.
  - Commercial & Production Use: Use of SMILE Studio within commercial
    organizations beyond evaluation, or redistribution as part of a commercial
    product, requires a paid commercial license from HALO.AI, LLC.
  - Change License: After four (4) years from the release date of each respective
    version, that version automatically converts to the GNU Affero General Public
    License version 3.0 (AGPLv3) or later.

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Commercial Licensing, Procurement, and Support
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A commercial license from HALO.AI, LLC grants you:
  - Complete freedom from GPLv3, AGPLv3 network-copyleft and BSL restrictions.
  - Full legal rights to embed SMILE in proprietary products and cloud services
    without any obligation to publish your source code or model weights.
  - Comprehensive Intellectual Property (IP) warranty and indemnification.
  - Professional support, guaranteed CVE resolution windows, and architecture advisory.

To obtain commercial licensing terms, OEM agreements, or an enterprise quote,
please contact:

    HALO.AI, LLC
    Email: sales@aihalo.dev
    Web:   https://www.aihalo.dev