Apache OpenOffice Calc is a free, open‑source spreadsheet application. Below is a curated list of the 20 most popular and capable spreadsheet tools that can serve as alternatives—ranging from industry‑standard desktop suites to collaborative cloud‑based platforms.
Get targeted exposure with custom position pinning and highlighted placement.
Industry‑standard desktop and web spreadsheet with advanced formulas, pivot tables, Power Query, and extensive charting.
Real‑time collaborative cloud spreadsheet, integrates tightly with Google Workspace and supports add‑ons via Apps Script.
Free, open‑source spreadsheet that offers a familiar interface, extensive function library, and strong compatibility with Excel files.
Online spreadsheet with AI‑assisted data cleaning, collaboration, and integration across Zoho’s business suite.
Mac‑ and iOS‑native spreadsheet focused on visual design, templates, and seamless iCloud syncing.
Feature‑rich web and desktop spreadsheet that supports Excel formats, real‑time co‑editing, and integration with Nextcloud/ownCloud.
Lightweight, Windows‑focused spreadsheet with a Ribbon UI, extensive templates, and strong Excel compatibility.
Hybrid spreadsheet‑database platform that lets users build relational tables, kanban views, and custom apps without code.
Enterprise‑grade work execution platform combining spreadsheet‑like grids with project‑management features and automation.
Collaborative docs and spreadsheets built for teams, with chat, task lists, and Salesforce integration.
Open‑source, web‑based spreadsheet that allows instant, anonymous real‑time collaboration without sign‑up.
Lightweight, open‑source spreadsheet for Linux, focused on accurate statistical and financial calculations.
Cross‑platform spreadsheet with cloud storage, mobile apps, and compatibility with Excel formats.
Mobile‑first office suite offering spreadsheet editing, cloud sync, and collaboration on Android & iOS.
No‑code platform to connect, automate, and manage data flows between multiple spreadsheets (Google Sheets, Excel, etc.).
While primarily a note‑taking app, it includes a simple spreadsheet module that syncs with Zoho Sheet for light‑weight tasks.
Free, browser‑based version of Excel with core features and OneDrive storage, ideal for quick edits.
Doc‑first platform where tables act like spreadsheets, enriched with formulas, automation, and building blocks.
All‑in‑one workspace offering flexible tables that behave like spreadsheets, with relational links and formulas.
Enterprise‑grade online office suite (based on LibreOffice) that provides a web spreadsheet with real‑time collaboration.