Spreadsheets have not changed much in forty years. The AI tooling around them finally has. Instead of Googling "excel index match multiple criteria" for the twentieth time, you can now describe what you want in plain English and get a working formula back in seconds.
There are dozens of these tools in 2026, and most of them hide behind a paywall after three generations. These eight have genuinely usable free plans, no credit card required, and cover the three ways AI actually helps with spreadsheets: writing formulas, cleaning and categorising data inside the grid, and running full natural-language analysis.
1. GPT for Work — free formula generator
GPT for Work's free Excel formula generator is the simplest possible version of this idea: type a description of what you want, pick Excel or Google Sheets, and get a formula back. No account, no sign-up, no API key — the vendor covers the model cost.
Its own FAQ is refreshingly honest: the generator cannot see your workbook, so it guesses cell references from your description. Name your actual columns ("amounts in column C, dates in column A") and the output will usually drop straight in. It only generates — it cannot explain or fix existing formulas. For that you need the paid add-in, which works inside the workbook and starts at $25/month after a free trial.
Best for: the quick one-off formula you would otherwise spend ten minutes fighting with. Always sanity-check the output against a few rows where you already know the answer before filling it down.
2. Shortcut — agentic Excel automation
Shortcut (tryshortcut.ai, from Fundamental Research Labs) is the most ambitious tool on this list. It is not a formula generator; it is an AI agent that operates Excel directly, automating tasks like financial modelling, P&L creation, and profitability analysis from plain-English prompts. It plugs into Microsoft Excel and Google Sheets and works with your existing files.
Independent coverage reports pricing starting around $25/user/month, with a free trial available. The pitch is that it handles up to 90% of routine spreadsheet work — data entry patterns, error detection, contextual traceability back to source cells. If your spreadsheet work is repetitive and formula-heavy, this is the one to trial first. If you just need the odd VLOOKUP, it is overkill.
Best for: finance analysts, small-business owners, and anyone who rebuilds the same kind of model every month.
3. Quadratic — the spreadsheet with Python and SQL
Quadratic is a different species: part spreadsheet, part code environment. Cells can hold formulas, Python, or SQL, and it connects directly to databases and APIs. You can ask it questions in natural language, and it will sometimes generate charts on its own without being prompted.
This is the tool for technical users who have outgrown Excel but still think in rows and columns. The free tier covers basic use, with Pro plans around $18/month for heavier limits. SOC 2 and HIPAA compliance make it viable for professional data teams too. Casual users will find it overwhelming — there is a real learning curve before the AI becomes useful.
Best for: data scientists, developers, and analysts working with large datasets that would choke a normal grid.
4. Rows — the AI-native reporting spreadsheet
Rows is a spreadsheet rebuilt from scratch around AI and business integrations. Instead of being a passive grid, it pulls in live business data, automates reporting workflows, and handles the kind of marketing and finance dashboards that usually need a BI tool.
Teams willing to work outside Excel and Sheets get the most out of it: automated reporting, marketing analytics, and operational workflows without writing a line of code. It is free to start, with paid tiers for heavier usage. The trade-off is the obvious one — migrating an existing Excel-heavy workflow to Rows is a commitment, so try it on a new reporting task rather than a legacy model.
Best for: marketing and RevOps teams tired of manually refreshing weekly reports.
5. Formula Bot — the no-signup formula helper
Formula Bot takes the opposite approach to most competitors: the core formula generator requires no sign-up at all. Paste your problem, get a formula, leave. It also covers Google Sheets alongside Excel, and can analyse an uploaded sheet, build charts, and both explain and debug formulas that are not working.
That no-friction design makes it the fastest option when someone sends you a broken workbook and asks "can you fix this?" Free plans are limited in volume, so it will not survive as your daily driver, but as a free tool for the occasional gnarly formula it is excellent.
Best for: beginners, business users, and anyone who wants help without creating an account first.
6. Numerous.ai — AI functions inside your cells
Numerous.ai works as a custom function dropped straight into a cell, the same way you would type =SUM(). Its strength is not calculation but text-based, row-by-row work: sentiment tagging, categorising entries, cleaning messy text, generating short product descriptions across a column.
This is a niche most formula generators ignore. If you have a spreadsheet with 2,000 customer reviews that need sentiment labels, Numerous.ai turns that into a one-function task instead of an afternoon. It is built for marketers, researchers, and content teams rather than accountants. Like most tools here, the heavy lifting happens on a free tier with limits that scale up on paid plans.
Best for: text cleanup, classification, and enrichment tasks that live in a column.
7. Julius AI — conversational data analysis
Julius AI is less a spreadsheet tool and more an AI data-analysis workspace. Upload an Excel file or point it at Google Sheets data, then analyse it through natural-language conversation: summaries, charts, pivot-style breakdowns, all generated for you.
It sits in the middle ground between a formula generator (too granular) and a full BI platform (too much setup). Students, analysts, and business users who receive raw data and need insight fast will get the most out of it. The free tier is genuinely useful for exploratory work; heavier files and exports push you toward paid plans.
Best for: one-off analyses of data files you did not create and do not want to rebuild.
8. AI Excel Bot — free formula generations monthly
AI Excel Bot (aiexcelbot.com, from Query Labs) is a straightforward freemium formula tool: 5 formula, code, or task generations per month on the free plan, no credit card required, plus a Chrome extension. Pro is $5.99/month for unlimited generation, including VBA code and formula explanations.
Five generations a month will not cover daily use, but combined with a free tier from Formula Bot or GPT for Work's no-signup generator, you can stretch a long way without paying. It is a good example of why stacking two free tiers beats paying for one subscription.
Best for: occasional formula and VBA help, stacked alongside another free generator.
How to pick the right one
The tools above solve three different problems, so match the tool to yours:
- Writing individual formulas: GPT for Work's free generator, Formula Bot, AI Excel Bot
- Cleaning and categorising text data: Numerous.ai
- Full analysis and reporting: Quadratic, Rows, Julius AI
- Automating recurring spreadsheet workflows: Shortcut
Two practical rules. First, every AI formula is a first draft: test it on rows where you know the answer before trusting it across a column. Second, free tiers are generous enough for real work if you combine them — use the no-signup tools for quick hits and save your limited monthly generations for the formulas that actually matter.