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ExcelDna.AddIn is a nuget library with a maintainer paid by Tidelift

The maintainers of ExcelDna.AddIn get paid by Tidelift to implement industry-leading secure software development practices and document the practices they follow.

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Thanks to maintainers working on projects like ExcelDna.AddIn, you can use Tidelift to give your teams access to a continuously curated stream of validated data about vetted components they need to make intelligent decisions, faster.

You can feel confident bringing ExcelDna.AddIn into your application’s dependency tree because the maintainers of ExcelDna.AddIn are paid by Tidelift to ensure their open source projects follow standardized secure software development practices.

ExcelDna.AddIn is a part of the Tidelift Subscription

What is this library?

Excel-DNA eases the development of Excel add-ins using .NET. Add-ins created with Excel-DNA can export high-performance user-defined functions and macros, and can be packed into a single file for easy distribution and installation. Excel versions 97 through 2016 can be targeted with a single add-in. Advanced Excel features are supported, including multi-threaded recalculation (Excel 2007 and later), registration-free RTD servers (Excel 2002 and later) and customized Ribbon and Task Pane interfaces (Excel 2007 and later) and asynchronous functions (Excel 2002 and later). Excel-DNA supports the .NET runtime version 2.0 (which is used by .NET versions 2.0, 3.0 and 3.5) and version 4.0 (the version number used by .NET 4, 4.5 and 4.6). The Excel-Dna Runtime is free for all use, and distributed under a permissive open-source license that also allows commercial use.

Proactively reduce your organization’s reliance on bad packages

Tidelift takes a unique, data driven approach to addressing the issue of bad packages. Tidelift partners with the maintainers of thousands of the most-relied-upon open source packages and pays them to implement industry-leading secure software development practices and document the practices they follow. The result is a unique source of cross-ecosystem package intelligence that customers use to identify and eliminate bad packages.

Tidelift’s package intelligence can be easily integrated into your preferred workflows using our flexible APIs or by adopting our web UI and CLI capabilities.

Learn more about Tidelift’s partnership with open source maintainers

The Tidelift maintainer advantage

Tidelift is the only company that partners with open source maintainers and pays them to: 
Implement industry-leading secure software development practices and validate the practices they follow so organizations can have the same confidence in the security of their open source that they have in their own code.
Contractually commit to continue these practices into the future so that organizations can confidently make long term investments in the packages they use.
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Maintainer Gary Gregory of Apache Commons used income from Tidelift and its customers to carve out  time to create a more robust security review process.
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Additional resources

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How to reduce your organization's reliance on "bad" open source packages

Improve the overall health and resilience of the open source you rely on so you can reduce the chances of being impacted by the next xz utils backdoor or Log4Shell.

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Check out the new state of the open source maintainer report which included 11 key headlines coming out of our new survey of over 300 open source maintainers.

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Tidelift mentioned in the Gartner hype cycle for open source software.

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