GridCraft

GridCraft — A fast, open-source, and native spreadsheet (Excel) program.

Developed entirely in Rust by the ArtCraft team, GridCraft is an open-source spreadsheet and data analytics application that offers a modern, fast, and high-performance alternative to cumbersome office programs. It can natively read and write the popular .xlsx file format.
Key Features and Advantages

    High-Performance Engine: Instant undo snapshots, incremental recalculation, and a virtualized grid structure deliver a smooth experience even with massive datasets.

    Comprehensive Function Library: Contains over 500 calculation functions, including a dependency graph calculation engine supporting dynamic arrays, LET, LAMBDA, MAP, REDUCE, and table references.

    Pivot Tables and Charts: Includes 17 different chart types with customizable formatting options, as well as Pivot Tables with filters, field lists, and date grouping features.

    Full File Compatibility: Formats, themes, formulas, data validations, comments, sparklines, and pivot tables are exported losslessly in .xlsx format.

    Rich Interface Flow: It offers all the spreadsheet workflows you know and love, including formula bars, name boxes, sheet tabs, fill handles, colored cell references, and conditional formatting.

Who is it suitable for?

    For all professionals, data analysts, and students who don't need expensive and slow desktop solutions, value privacy, and want to quickly analyze large amounts of data and work with advanced formulas.