FastSheet and SpreadSheet are both web spreadsheet components from the TreeGrid product family. Both can be used to open, edit and save spreadsheet-like data directly in the browser.
FastSheet and SpreadSheet are both web spreadsheet components from the TreeGrid product family. Both can be used to open, edit and save spreadsheet-like data directly in the browser. Both support Excel-like editing, formulas, formatting, import, export and integration into enterprise web applications. The difference is in the engine, performance profile and ideal use case.
Choose FastSheet when performance and large XLSX files are the main requirements. FastSheet is built on FastGrid and is designed for high-performance spreadsheet editing. It is the better choice when users need to work with very large spreadsheets, smooth scrolling, large row and column counts, modern virtualization, AI-assisted data manipulation and fast browser-based processing.
The right component is not the one with the longest feature list. It is the one that matches the primary way users work with data in your application.
FastSheet is especially suitable for financial models, BI tools, data analysis interfaces, operational spreadsheets, browser-based Excel replacement workflows and applications where users need to open, calculate, edit and save large XLSX files without sending them to a server. It is also a strong fit for modern frontend stacks because it supports frameworks such as React, Vue, Angular, Svelte and Vanilla JavaScript, with TypeScript definitions.
Key decision: choose the component around the main risk in the project: performance, complexity, spreadsheet behavior, scheduling logic or long-term maintainability.
Choose SpreadSheet when you need the established TreeGrid-based spreadsheet component and its mature enterprise features. SpreadSheet is built as a TreeGrid extension. It is useful for applications that rely on mature spreadsheet behavior, complex configuration, localization, RTL support, formula selection across sheets, expression-based search, cell hints and integration with the TreeGrid ecosystem.
In other words, FastSheet is the more performance-oriented spreadsheet option, while SpreadSheet is the more established TreeGrid-based spreadsheet option.
For new projects with very large XLSX files, high-performance spreadsheet rendering or AI-assisted spreadsheet workflows, FastSheet is usually the stronger starting point. For existing TreeGrid-based projects, localized enterprise applications or spreadsheet workflows that depend on mature TreeGrid-specific capabilities, SpreadSheet may be the better fit.
The best way to decide is to look at the main risk in your project. If the risk is file size, rendering speed or modern browser performance, choose FastSheet. If the risk is compatibility with existing TreeGrid logic, localization or highly specific spreadsheet behavior, consider SpreadSheet.
Spreadsheet options
Core file workflow
Localization scenarios supported by SpreadSheet
The best choice depends on the core interaction: browsing large records, managing complex hierarchy, working with spreadsheet files or planning work on a timeline.
If two components seem close, test both with real data and the workflow users will actually perform every day.
Compare FastSheet and SpreadSheet
Choose the right web spreadsheet depending on performance, XLSX workflows and mature TreeGrid features.
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