xllify – Licence & Open Source Credits

Software Licence

Pre-Release Software Notice

This software is provided as pre-release/beta software. It is provided “as is” without warranty of any kind, either express or implied.

Licence Grant

Permission is hereby granted to use this software for evaluation and commercial purposes, subject to the terms and conditions set forth in this agreement.

Disclaimer of Warranties

This software is provided “as is” without warranty of any kind, express or implied, including but not limited to the warranties of merchantability, fitness for a particular purpose and non-infringement. The entire risk as to the quality and performance of the software is with you.

Limitation of Liability

In no event shall Lexvica Limited be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.

Output Artefacts

All artefacts produced by xllify — including compiled XLL binaries, Office.js add-in packages, standard-library code bundled into your add-ins, and AI-generated function code — are yours. They are released to you under the MIT Licence and may be freely used, modified, and distributed for any purpose, including commercial use. The MIT Licence requires that the copyright notice and licence text are retained in copies or substantial portions of the software. The full MIT Licence text is reproduced at the bottom of this page.

Malware, Abuse & Upstream Dependencies

Lexvica Limited makes best endeavours to ensure that xllify tooling cannot reasonably be used to produce malware or malicious software. If, despite this, you encounter or are affected by malicious software constructed using xllify, please report it to us so we can investigate and take appropriate action. Lexvica Limited bears no liability for third-party misuse of xllify or any artefacts produced with it.

xllify depends on third-party open source libraries listed below. Lexvica Limited is not responsible for bugs, security vulnerabilities, or defects in those upstream dependencies. Users are encouraged to keep their tooling up to date and to monitor relevant security advisories.

No Support Obligation

Unless a separate commercial support agreement is in place, Lexvica Limited is under no obligation to provide support, updates, enhancements, or modifications to this software. The disclaimers and limitations of liability above apply to the free, no-cost offering of xllify. Separate terms may apply under a private commercial arrangement.

Open Source Credits

xllify is built using the following third-party open source libraries. We are grateful to their authors and contributors.

Luau

Lua language implementation with gradual typing.

© 2019–2025 Roblox Corporation; © 1994–2019 Lua.org, PUC-Rio
Licence: MIT
luau-lang.org

spdlog

Fast C++ logging library.

© 2016 Gabi Melman
Licence: MIT
github.com/gabime/spdlog
spdlog depends on the fmt library (MIT Licence).

JSON for Modern C++ (nlohmann/json)

JSON library for Modern C++.

Licence: MIT
github.com/nlohmann/json

ZeroMQ (libzmq)

High-performance asynchronous messaging library.

Licence: Mozilla Public License 2.0 (MPL-2.0)
zeromq.org

Microsoft Excel SDK

Excel XLL SDK headers and libraries.

Licence: Proprietary (Microsoft)
Microsoft Excel SDK
Distributed for use with Microsoft Excel add-in development only.

MIT Licence Text

The following MIT Licence applies to Luau, spdlog, fmt, and nlohmann/json:

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.