AI for Google Sheets: the best 10 add-ons compared in 2026

Gemini in Google Sheets Best for: per-row AI at scale, if you're on Workspace

The default, and on the Sheets side that's a stronger statement than it is on Excel's. Google shipped a native AI worksheet function — =AI(), with =GEMINI() mapping to the same thing — that generates text, summarises, categorises, analyses sentiment, and can reach Google Search for real-time information. Fill with Gemini wraps it for bulk data entry, and as of July 2026 it works across fifteen languages.

Because it's native rather than an Apps Script add-on, it isn't bound by the 30-second custom-function limit. For filling a column across thousands of rows, that alone puts it ahead of every third-party function here.

The pricing story changed for the better in March 2025, when Google retired the $20 and $30 per-user Gemini add-ons and folded the features into the Workspace plans. If you're already on Business Standard, you have this and may not know it.

• Native function, no Apps Script ceiling — the only tool here that scales cleanly to thousands of rows.
• Already paid for if you're on Business Standard or above.
• Stays inside your Workspace tenant, which matters for anyone with a compliance team.

• Effectively requires a paid Workspace plan. Personal Gmail accounts and Business Starter get little or nothing.
• Rollouts are gradual and region-gated, so "available" and "available to you" differ by weeks.
• It reasons about the sheet, not your systems. The data still has to arrive somehow.
• No model choice — it's Gemini or nothing.

ChatGPT for Google Sheets Best for: building and interrogating a whole workbook

OpenAI began testing this in Sheets in April 2026 and launched it globally the following month alongside the Excel version, running on GPT‑5.4. It reasons across a spreadsheet rather than a selection — how tabs and formulas connect, why a number changed, where an error came from — and will build a tracker or dashboard from a description. It asks before writing, so edits can be reviewed or undone.

For anyone who works in both Sheets and Excel, one add-on covering both with shared behaviour is a genuine convenience the others don't offer.

• Strongest here at tracing an error back through a model to the cells that caused it.
• Same add-on and same behaviour in Sheets and Excel.
• No extra subscription if your team already pays for ChatGPT.

• Sidebar only — there's no custom function to fill down a column with.
• It works on the sheet that's open, so recurring reports mean re-opening and re-asking.
• New enough that Workspace admin controls and data-handling review are still catching up in many organisations.

GPT for Sheets and Docs Best for: bulk cell-by-cell AI work

The incumbent, with over seven million installs — more than everything else on this page combined. It's the reference implementation of the "run a model on every row" job: functions for classify, extract, translate, summarise and clean, filled down a column like any formula, with a sidebar for bulk runs that works around the Apps Script limits rather than into them.

It supports OpenAI, Anthropic and Google models side by side, which in practice is the most reliable way to get Claude into a Google Sheet at all. Pricing has split: existing spaces stay on prepaid credits (packs from $29, expiring after a year), new spaces go onto per-seat subscriptions with an included allowance.

• Best-in-class function set for bulk row-level work; nothing else matches it.
• Model choice across three providers, including your own API key.
• The bulk sidebar handles large jobs properly instead of fighting the 30-second wall.

• No free plan, and prepaid credits expire after twelve months.
• It fills cells; it won't reason about your spreadsheet as a whole.
• Cost is genuinely hard to predict before you've run a real job.

SheetAI.app Best for: the best free tier in the category

Sheets-native and built around a family of functions — =SHEETAI() for text, =SHEETAI_LIST() for a list down a column, =SHEETAI_TABLE() for a block of structured output — across GPT‑4o, Gemini and Claude. The table variant is the interesting one: getting structured output back into a range of cells is fiddly with most tools and straightforward here.

Fifty free calls a month is the most generous no-card free tier on this page, and enough to establish whether the approach suits your work before paying anyone.

• Real free tier, no card, enough calls to evaluate honestly.
• =SHEETAI_TABLE() is the cleanest structured-output function in the category.
• $5.99 with no API key required is the lowest genuine entry price here.

• Pricing is reported inconsistently across review sites — check the current page before buying.
• The cheap plan is metered; unlimited means bringing your own API key and paying tokens separately.
• Sheets only, so no help if half your team lives in Excel.

Numerous.ai Best for: solo users doing repetitive text work

Same shape as GPT for Sheets — a function that calls a model per row — with a gentler on-ramp and a lower price if you commit annually. It works in Sheets and Excel from one subscription, and the everyday uses are the unglamorous ones: categorising a product list, writing a few hundred meta descriptions, standardising inconsistent labels.

• Cheapest credible per-cell AI if you pay annually.
• Sheets and Excel from a single subscription.
• Simple enough to hand to a non-technical colleague.

• Metered in characters, so long prompts burn the allowance faster than the row count suggests.
• The trial costs a dollar rather than being free.
• Team sharing caps out low on the Pro plan.

Coefficient Best for: pulling live system data into the sheet

Coefficient's real job is connectors — Salesforce, HubSpot, QuickBooks, NetSuite, Snowflake and 150-odd others — landing live data in a sheet on a schedule, with AI layered over the top. It's here because for many teams the AI question is downstream of a data question: you can't ask anything useful about your pipeline until the pipeline is in the sheet.

Check the tier boundaries before you budget. The warehouse and ERP connectors that finance teams usually want — Snowflake, Sage Intacct, NetSuite — sit on Pro and Enterprise, not Starter.

• By far the deepest connector library here.
• Scheduled refresh, so the sheet isn't stale by Wednesday.
• Sheets is its home platform; the Excel version came later.

• Per-seat pricing gets expensive fast, and $99 a seat for the connectors you probably want is a real number.
• The AI is a layer on a data-integration product, not the point of it.
• Overkill if your data already arrives as a CSV export.

Ajelix AI Toolkit Best for: writing and explaining formulas cheaply

A formula generator, formula explainer and Apps Script writer in a sidebar. The explainer is the underrated half — paste in a nested monster somebody left behind and get a plain-English account of what it does. It understands Sheets' own functions and named ranges rather than translating Excel syntax across, which is more than some cross-platform tools manage.

• A real free tier, small but enough to evaluate honestly.
• Formula explanation is excellent for inherited spreadsheets.
• Generates Apps Script too, which pairs well with the roll-your-own route below.

• It doesn't touch your data — it writes formulas, you run them.
• Ten free requests a month goes fast.
• The jump from $5.95 to $20 is steep for what the Lite tier adds.

Formula Bot Best for: occasional formula help

One of the first tools in this space, with a Sheets add-on alongside the web app and the Excel version. The caveat is commercial rather than technical: pricing reported across review sites during 2026 is inconsistent, and the public pricing page has been routing tiers to a sales form. Find out what it actually costs before committing.

• Well established, with a large library of worked examples.
• Formula generation, explanation and analysis in one place.
• Historically the cheapest paid option in the category.

• Pricing is genuinely unclear right now — that alone would make me hesitate.
• Overlaps heavily with Ajelix, which has a clearer free tier.
• Formula focus means it isn't an answer engine for your data.

Smart Fill & Smart Cleanup Best for: the job you were about to overpay for

Not AI in the large-language-model sense, and that's the point. Smart Fill detects the pattern in what you've typed and completes the column — splitting names, building email addresses from a first and last name, pulling a domain out of a URL. Smart Cleanup flags duplicates and inconsistent formatting. Both have been in Sheets for years and both are free.

I've included it because a meaningful share of what people buy AI add-ons for is pattern completion, and this does pattern completion better, faster and free. Try it before you spend anything. If it can't do the job, you now know you actually need a model.

• Free, instant, no quota, no add-on to install or get past an admin.
• Deterministic — the same input gives the same output every time, which no LLM here guarantees.
• Nothing leaves your Workspace.

• Pattern completion only. It can't classify sentiment, summarise, or answer a question.
• Needs a few examples before it infers correctly.
• Silently gives up on anything genuinely irregular.