7 Best Free AI Tools for Excel in 2026
"Free" hides a lot of small print. Some of these tools are free forever, some give you a real free tier with limits, and at least one is only free until a trial runs out. Here's an honest round-up of the genuinely useful free AI tools for Excel in 2026 — what's actually free, what each is best at, and what you pay if you outgrow it.
The short version
· Best free analytics: DataHub Pro — free in-browser forecasting, cohort and anomaly tools (no signup), plus a free account tier for AI Q&A on your files.
· Best free formula help: GPTExcel and Formula Bot — generate and explain formulas with no cost.
· Best free general assistant: ChatGPT's free tier for quick, ad-hoc questions on small files.
· Watch out: Microsoft Copilot in Excel is free only during a trial — it's a paid add-on after that.
How we picked them
We only included tools with a real free path — either free forever, or a free tier you can genuinely use without a card. For each one we note exactly what's free, what it's best for, and what you pay if you upgrade, so you don't discover a paywall halfway through a task. No affiliate links; pricing and free-tier limits are taken from each vendor in June 2026 and change often, so verify before you commit.
| Tool | What's free | Best for | Paid from |
|---|---|---|---|
| DataHub Pro | In-browser forecasting, cohort & anomaly tools (no signup) + free account tier | Free AI analytics & forecasting | $14.99/mo |
| GPT for Excel | Free quota (BYO API key for more) | Bulk formula & text functions in-grid | Usage / API cost |
| Formula Bot | Free tier (daily cap) | Plain-English → formula | ~$9/mo |
| GPTExcel | Free formula generate & explain | Quick formula & regex help | ~$7/mo |
| Numerous AI | Free trial / limited free tier | AI fill-down across rows | ~$10/mo |
| Copilot in Excel | Trial only | Native M365 assistant | ~$30/user/mo |
| ChatGPT (free) | Free tier (small files, capped) | Ad-hoc questions on a small file | $20/mo (Plus) |
1. DataHub Pro (free tier)
Free tools + free account · paid from $14.99/moThe most capable genuinely-free option for actual analysis, not just formulas. Three in-browser tools — Holt-Winters forecasting, cohort retention and an anomaly detector — run entirely in your browser tab with no signup and your data never leaves your machine. Create a free account and you also get AI Q&A on an uploaded Excel/CSV file. When you need recurring dashboards, larger files and one-click Word/PowerPoint reports, the paid plan is a flat $14.99/mo.
2. GPT for Excel
Free quota · then API costA popular add-in (Excel and Google Sheets) that exposes GPT as spreadsheet functions — =GPT(), classification, extraction and translation across whole columns. There's a free quota to start; heavier use runs on your own OpenAI API key, so cost scales with usage rather than a fixed subscription.
3. Formula Bot
Free tier · paid ~$9/moType what you want in plain English and get the Excel (or Google Sheets) formula back, plus an explanation. The free tier gives you a handful of generations a day, which is plenty for occasional formula help.
4. GPTExcel
Free generate & explain · paid ~$7/moA lightweight web tool that generates and explains Excel formulas, plus VBA and regex, from a prompt. The core generate/explain flow is free to use, which makes it a handy bookmark when you're stuck on a formula.
5. Numerous AI
Limited free tier · paid ~$10/moA spreadsheet add-in (Sheets and Excel) built around an AI fill-down: write one example, drag, and it applies the same AI transformation to every row — categorising, extracting or rewriting text at scale. There's a limited free allowance to try it before a paid plan.
6. Microsoft Copilot in Excel (trial)
Trial only · then ~$30/user/moThe native Microsoft 365 assistant inside Excel is excellent for formula help, summarising ranges and quick analysis — but it's only free during a trial. After that it's a paid Copilot add-on, so we include it here for honesty rather than as a free-forever option.
7. ChatGPT (free)
Free tier · Plus from $20/moChatGPT's free tier can answer questions about a small spreadsheet you paste or upload, write formulas and explain steps. It's flexible and familiar, but treat its numeric answers as drafts — on the free tier especially, it's a general assistant, not an audited analytics tool.
Which free tool should you use?
If you just need a formula, GPTExcel or Formula Bot will sort you out for free in seconds. For repetitive AI work down a column, try GPT for Excel or Numerous AI. But if you want to actually analyse data for free — forecast a series, check cohort retention, or flag anomalies — DataHub Pro's in-browser tools do it with no signup and nothing leaving your browser, and the free account adds AI Q&A on your own files. When free hits its limits, it's also the cheapest honest upgrade at $14.99/mo flat.
Try the free tools on your own data
Run a free Holt-Winters forecast, cohort retention heatmap or anomaly check right in your browser — no signup, no upload. Or create a free account for AI Q&A on your file.
Start free — no card needed →