Free AI for Excel & Data Analysis (2026)

TL;DR — Decision table

Tool	Best for	Free limit	Verdict
DeepSeek	Analyzing CSV/Excel at no cost, formulas, cleanup	Free at chat.deepseek.com, no published message cap	The most flexible no-cost option for repeated spreadsheet work
ChatGPT Free	Uploading one Excel file and asking for analysis or a chart	Daily file-upload quota (varies with load)	Fine for one-off questions, not for analyzing spreadsheets daily
Claude Free	Analyzing datasets with a reasoned, step-by-step explanation	15-40 messages per 5-hour window (varies with length)	The most careful at explaining the “why,” but the limit chokes long sessions
Gemini	Working with data outside Google Sheets	Free at gemini.google.com; the Gemini panel inside Sheets requires a paid plan	Not free when embedded in Sheets — it is free as a standalone chat
Copilot in Excel	Native integration in desktop Excel	Requires paid Microsoft 365 Personal/Family (AI credits included) or a business license	The best integration on the market, but there’s no real free tier

What’s the best free AI for Excel?

For a one-off job with zero spend, DeepSeek (chat.deepseek.com) is the most flexible pick: upload the Excel or CSV, ask for analysis, formulas, or data cleanup, and there’s no published message cap to cut your session short. If you’d rather have more reasoned explanations of why a data point is an outlier or how to structure a formula, ChatGPT Free and Claude Free both do a solid job, but they both cap how many files or messages you get per day.

What changed in 2026 compared to previous years: Copilot no longer has a standalone consumer plan you can buy separately (Copilot Pro stopped accepting new signups), Gemini shipped its most capable integration inside Google Sheets but put it behind a paywall, and Microsoft retired Excel’s free native “Analyze Data” feature (that capability now lives inside paid Copilot). The practical result: AI inside your spreadsheet without paying has all but disappeared; if uploading the file to an external chat works for you, solid free alternatives still exist.

For the full picture of free AI tools beyond Excel, I cover it in the best free AI of 2026 comparison.

Copilot in Excel: the native integration, but paid

Copilot inside desktop Excel — the one that suggests formulas, explains complex sheets, and generates analysis directly in your cells — has no real free tier in 2026.

What you need to use it:

A Microsoft 365 Personal or Family subscription with AI credits included (Microsoft 365 Personal runs around $9.99/month), which grants 60 Copilot credits a month usable across Word, Excel, Designer, and other Office apps
Or a business license compatible with Copilot Chat, layered on a Microsoft 365 or Office 365 base plan (E3, E5, Business Premium…)

What changed: the old standalone Copilot Pro ($20/month) stopped accepting new subscribers; existing subscribers can keep using it until they cancel or until end of support (August 2026). After that, the replacement for individuals is Microsoft 365 Premium, which bundles Copilot together with the full desktop apps.

Verdict: if you’re already paying for Microsoft 365 with AI included, it’s the most convenient integration out there — it works directly on your cells, no copy-pasting required. If you’re looking for a free option, this isn’t it — skip it and go to the chat-based alternatives below.

ChatGPT Free: upload the spreadsheet and ask

ChatGPT’s free plan lets you upload spreadsheets and use its built-in data analysis (the old “Advanced Data Analysis” / Code Interpreter) to read the file and generate tables, formulas, and charts.

How it works in practice:

Upload the Excel or CSV file (up to roughly 50 MB) and describe what you need: “summarize these sales by month,” “find the duplicates,” “make a bar chart”
The free plan enforces a daily upload quota — OpenAI doesn’t publish an exact number, so assume a heavy work day can burn through it

Where it shines:

Quick exploratory analysis of a one-off file
Generating formulas and explaining what an existing formula does
Simple charts from the uploaded data

Where it falls short:

Analyzing several different spreadsheets in the same work session
Very large datasets where you need to iterate many times over the same file

Verdict: solid for occasional questions. If your day-to-day involves constantly analyzing spreadsheets, the free plan’s file quota runs out before the week does.

Claude Free: the most careful about explaining its work

Claude (from Anthropic) lets you upload files on its free plan, including Excel and CSV, and it’s particularly good at explaining the reasoning behind an analysis rather than just handing you the result.

Free plan limits in 2026:

Between 15 and 40 messages per 5-hour window depending on exchange length (a sliding window, not a daily reset)
Uploaded files eat into that message limit faster than plain text — analyzing a large Excel file burns quota faster than a short question does

Where it stands out:

Explaining why a column has inconsistent values, not just flagging them
Suggesting a step-by-step data-cleanup structure and reasoning through each step
Catching data-quality issues a quick glance would miss

The honest problem: the 5-hour window limit is unpredictable. If you’re mid-way through an exploratory analysis with several back-and-forth turns, you can run out of messages before you finish.

Verdict: the best reasoning quality on data of the group, but the message limit makes it a complement rather than your main daily driver for Excel work.

Gemini: powerful in Sheets, but paid once you’re there

Gemini has two very different faces depending on where you use it, and it’s worth not confusing them.

Inside Google Sheets: the Gemini side panel that edits and builds complex spreadsheets directly requires a paid plan — Google Workspace Business Standard or higher, or Google One with AI Premium. There’s no free version of this integration inside the sheet itself.

Outside Sheets: you can use Gemini for free at gemini.google.com and upload your Excel or CSV file just like you would with ChatGPT or Claude, with daily usage limits that vary based on demand on the service.

Verdict: if you work inside Google Sheets and don’t pay for Workspace or Google One, Gemini isn’t available there — use the free web chat as a workaround, knowing you lose direct in-sheet editing.

DeepSeek: free and frictionless for Excel

DeepSeek is the option that puts the least friction between you and analyzing data for free.

How to use it:

At chat.deepseek.com, upload the file via the attachment icon and ask for the analysis in plain language
It supports Excel (XLSX/XLS) and CSV directly, parsing the file into tables you can interact with by column and row
There’s no published message cap on the web chat for normal use

Where it shines:

Descriptive statistics and outlier detection across full datasets
Generating formulas from a plain-language description of what you need to calculate
Narrative summaries of what a large table contains

Real limitation: there are practical caps on file size and rows/columns per uploaded sheet (⚠️ the exact numbers vary and aren’t officially published by DeepSeek — if your file is very large, test it rather than assume it’ll load whole).

Verdict: for repeated spreadsheet work without spending a dollar, it’s the most practical option of the group. If data privacy is a concern, read the section below before uploading anything sensitive.

To understand the DeepSeek ecosystem better, including the privacy implications, I’ve got the full DeepSeek guide.

Excel without Copilot: the free native option is gone

Until recently, Excel included “Analyze Data” (formerly “Ideas”): a feature that generated automatic charts and summaries for free, without uploading anything to an external server, with any Microsoft 365 license. It was the de facto quick first look.

In 2026 Microsoft has been phasing it out. The old “App Skills” left Excel earlier in the year and their functionality got absorbed into Copilot (Agent Mode, Copilot Chat, and Analyst mode). The catch: those replacements require a paid Copilot license. The free, native path to automatic analysis inside Excel has, in practice, stopped existing.

Verdict: if you were counting on free “Analyze Data,” bad news — it’s no longer a reliable option in 2026. For AI inside the sheet itself you need Copilot (paid); for free AI, the realistic route is uploading the file to one of the external chats above.

Concrete use cases

Generating formulas: paste the data range (or describe it) into DeepSeek or ChatGPT Free and ask for the exact formula you need — “total column C grouped by region in column A.” Both are good enough for medium-complexity formulas at zero cost.

Cleaning data: for large datasets with lots of issues (duplicates, inconsistent formats, null values), DeepSeek handles iteration better since it doesn’t impose an aggressive message cap. If the dataset is more complex and you want to understand the reasoning behind each cleanup step, Claude Free explains it better, even if you have to ration your messages.

Building charts and exploratory analysis: upload the file to DeepSeek or ChatGPT and ask for the chart in plain language (“compare these two series in a line chart with annotations”). The old native “Analyze Data” feature is no longer a reliable free alternative in 2026 (see the section above), so free exploratory analysis now runs through an external chat.

Generating SQL with AI (text-to-SQL): a quick note

If your “Excel” is actually a database export and what you really need is the original query, you don’t have to go through the spreadsheet at all. Describe the table schema (column names and relationships) to DeepSeek, ChatGPT, or Claude, and ask for the SQL query directly — all three generate reasonably good SQL for medium-complexity queries (joins, aggregations, filtered conditions).

That’s a narrower use case than Excel analysis itself, so it’s not the focus of this post — if your day-to-day is more code than spreadsheets, the best free AI for coding comparison covers that need in more depth.

Privacy: think before you upload company data

There’s no middle ground here: if the Excel file contains customer data, internal financial figures, or anything under NDA, don’t upload it to a cloud AI chat without checking your company’s policy first.

Every one of these tools processes your file on third-party servers:

DeepSeek processes and stores data on servers in China — for sensitive company data, it’s the option with the most open questions of everything mentioned here
ChatGPT, Claude, and Gemini on their free plans may use your conversations to train models unless you explicitly turn that off in the privacy settings
Copilot in Excel inside a business plan with Microsoft Graph carries contractual guarantees that your data doesn’t train models outside your organization — it’s the only option above built specifically for that case

If the file is yours, personal, or contains nothing sensitive, upload whatever you need without overthinking it. If it belongs to your company, the right question isn’t “which AI is best,” it’s “what does my company’s data policy say about uploading information to external services” — ask before you regret it.

FAQ — Frequently asked questions

What’s the best free AI for Excel in 2026?

It depends on whether you need the AI inside Excel or you’re fine with a separate chat. Inside Excel, there’s no real free option — Copilot requires paid Microsoft 365. As an external chat you upload files to, DeepSeek is the most flexible since it doesn’t impose an aggressive message cap.

How do I analyze an Excel file with free AI?

Upload the file to chat.deepseek.com, chatgpt.com, or claude.ai (all three have a free plan with file uploads) and describe in plain language what you need: a summary, a formula, a chart, or error detection. Inside Excel itself, the old free “Analyze Data” feature was retired in 2026, and its replacement (Copilot) is paid.

Is Copilot in Excel free?

No. It requires a paid subscription to Microsoft 365 Personal, Family, or a business license compatible with Copilot Chat. There’s no standalone free version in 2026.

Can I use Gemini for free in Google Sheets?

The Gemini panel built into Sheets requires a paid plan (Google Workspace or Google One with AI Premium). You can use Gemini for free outside Sheets, at gemini.google.com, by uploading the file as CSV or Excel.

Is it safe to upload company data to these AI tools?

Not by default. Each tool has its own data-use policy, and some use free-tier conversations to train models unless you turn that off. For sensitive data, check your company’s policy first; don’t assume “it’s free” means “it’s safe for this.”

Keep exploring

Best free AI in 2026 - The full comparison of free AI tools, beyond Excel
Best free AI for coding - If your work is more code than spreadsheets
Complete DeepSeek guide - How to get the most out of the most flexible free option for data