April 25th, 2025

Show HN: A modern spreadsheet with Python integration

GS-Calc is a powerful spreadsheet application that processes large datasets, supports unlimited worksheets, integrates Python, and offers a trial version with free upgrades for a year.

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Show HN: A modern spreadsheet with Python integration

GS-Calc is a powerful spreadsheet application designed for handling large datasets, capable of processing up to 32 million rows and 16,384 columns. It allows users to edit extensive CSV and XLSX files, build complex data models, and perform operations like VLOOKUP and MATCH significantly faster than traditional spreadsheet software. GS-Calc supports unlimited worksheets and subfolders, automatically splits large files into manageable sheets, and offers advanced features such as Monte Carlo simulations, extensive pivot table functions, and the ability to integrate Python for custom functions. The software is optimized for performance, enabling quick loading, saving, and editing of large files, and it includes built-in functions for data integrity verification and comparison. Users can create and manage scripts in JScript and VBScript, and the application can be run from portable storage without installation. GS-Calc is available in a trial version with free upgrades for a year, and it is compatible with various Windows operating systems.

- GS-Calc can handle datasets of up to 32 million rows and 16,384 columns.

- It offers faster performance for data operations compared to traditional spreadsheets.

- Users can integrate Python for custom functions and utilize JScript and VBScript for scripting.

- The software supports unlimited worksheets and can automatically split large files.

- A trial version is available with free upgrades for 12 months.

Link Icon 5 comments
By @tianqi - about 10 hours
It is an interesting tool. I've been struggling with Office Excel's inability to open large files. I always work with csv in python, and if a client must review the data in Excel, I take a random sample to generate a smaller file, then explain to the client that we can't open the whole in Excel. This really doesn't seem like a modern work.

"a slow, old pc with 8GB RAM"

By the way, this struck me like a humour of era. Oh god it has 8GB RAM. Cheers! To the good old days.

By @sunray2 - about 11 hours
So I'll take a layman's view here since I've only cursory experience of the big data tasks that this software seems to made for. Or maybe the pitch is still different and it went over my head.

It loads quick, and works with large data. Crucially, you can view and edit visually, not only programmatically.

Assuming those already working with such data have Excel and Python tools etc., the pitch here is that the $39 license fee saves time or effort. So, is it that the user can spot and correct errors that you couldn't otherwise do with either Excel or with other big data tools? And/or otherwise do the necessary data manipulations?

I came across the phrase 'eyes like a shithouse rat' recently, to describe the people doing final checks at a printing press. I think there's probably plenty of people out there who would pay $39 for eyes like a shithouse rat.

Also the website makes me nostalgic :)

By @akdor1154 - about 7 hours
Looks very cool, but Windows only?
By @conductr - about 11 hours
It all sounds very compelling , great work! But I have to ask, what’s the catch? This almost seems like it’s ready to fully replace Excel but I’ve seen many things die in that pursuit. What will Excel users miss by switching?

I’m don’t do a ton to big data stuff, but sometimes despite Excels stated row and column support- I find it effectively melts down if even 100K/100 of data and forget adding formulas.

By @Yiling-J - about 7 hours
https://rowzero.io/ can handle 1 billion+ rows and offers native Python support. Also compatible with Excel and Google Sheets. However it’s a cloud based solution, and the private hosting option is only available to Enterprise users.