Quick answer: Start with the Gemini already inside your Workspace plan — it writes formulas, builds charts and pivot tables, and its =AI() function handles light text work. If your job is bulk work across thousands of rows, GPT for Work is the strongest add-on. For live dashboards fed from a CRM or database, Coefficient is the pick. For cheap formula help, SheetAI or Numerous cover it. And if your job is none of these — one formula a week — you may not need an add-on at all.
Do You Even Need an Add-On?
Answer this before you install anything, because the most common mistake in this category is buying a subscription for a job the bundled tool already does.
- You write one formula a week. You do not need an add-on. Ask the Gemini side panel, or paste the problem into a general AI assistant, and paste the formula back. The add-on’s monthly fee buys you nothing.
- You clean, classify, or translate hundreds of rows at a time. You need an add-on built for bulk work. Gemini’s =AI() function processes row by row and slows down noticeably past a few hundred rows.
- You want a dashboard that refreshes from your CRM. You need a live-data connector, not a text generator. No formula-writing add-on does this.
- You want to ask questions about a finished sheet. You need an ask-about-the-sheet copilot, not a formula writer.
The rest of this article is organized by those four jobs, because no tool on this list does all four well.
The 6 Tools, At a Glance
| Tool | Job it does best | Starting point | Billing model |
|---|---|---|---|
| Gemini (native) | One formula, charts, light text work | Included in Workspace Standard ($14/user/mo) | Bundled in seat |
| GPT for Work | Bulk text work across thousands of rows | $25/mo (incl. $25 usage) | Subscription + usage |
| Numerous.ai | Bulk formulas + text, cheap | Personal $8/mo (annual) | Subscription, token-limited |
| SheetAI | Formula help, BYOK option | Free BYOK / $12-mo Starter | Subscription or bring your own key |
| Coefficient | Live CRM/database dashboards | From $49/mo | Per-seat subscription |
| Arcwise | Ask questions about the sheet, cleaning | Third-party listings $9–$30/mo (unverified) | Subscription (check page) |
Job 1: “Write Me One Formula” — Gemini Wins, Add-Ons Tie
Every tool on this list writes formulas. Gemini does it inside Sheets with no install: open the side panel, describe the result, and it proposes a formula, a chart, or a pivot table. The =AI() function (also callable as =Gemini()) runs a prompt inside a cell — =AI("Categorize this feedback as positive, neutral, or negative", A2) — and dragging it down a column classifies every row.
The catch is verification, and it applies to every tool, not just Gemini. AI-written formulas sometimes reference the wrong cell ranges, especially in sheets with several tabs, and a formula that runs without an error can still return the wrong answer. Before you trust any AI-written formula, run the check in the verification section below.
If you are on Google Workspace Business Standard ($14 per user per month, annual billing) or above, Gemini in Sheets is already included — you are paying for it whether you use it or not. Business Starter ($7) does not include Gemini in Sheets at all, so Starter users who want in-sheet AI either upgrade to Standard (an extra $7 per user per month) or buy an add-on. Personal Google accounts need a Google One AI plan (about $19.99 a month) for the same features. The old standalone Gemini add-ons no longer exist.
Job 2: “Process 5,000 Rows” — GPT for Work, With Eyes Open on Cost
Bulk work — classify 5,000 support tickets, translate 5,000 product descriptions, extract fields from 5,000 rows of messy text — is the job add-ons exist for. GPT for Work (formerly GPT for Sheets) is the strongest here: bulk tools that run a prompt down a column, a choice of models including frontier ones, usage reporting per seat, and a sidebar plus cell functions.
Its pricing is a subscription plus usage. Standard is $25 a month and includes $25 of usage; Business is $45 per seat per month with the same included-usage structure. Extra usage is bought as needed, and unused included usage does not roll over. Older coverage quotes “$29 credit packs plus API costs” — that pay-as-you-go model survives only for existing spaces; new spaces start on subscription.
What does a 5,000-row job cost? It depends on the model and the prompt length, because usage is metered on tokens. One third-party review cites roughly $1.50 per 1,000 cells on standard models and roughly $15 per 1,000 cells on premium models — which would put a 5,000-row job at about $7.50 on a standard model and about $75 on a premium one. Treat those as planning figures from a third party, not vendor promises: run the usage estimator on the pricing page with your real prompt before committing to a bulk job. The practical rule is to prototype on 50 rows, read the usage report, and multiply.
Numerous.ai and SheetAI also do bulk work, cheaper, with narrower model choice. Numerous exposes =AI, =WRITE, and =INFER as cell functions you drag down a column, and its Personal plan is $8 a month billed yearly (Pro $24). SheetAI’s Starter is $12 a month for about 500 AI runs, and Pro is $29 a month for soft-unlimited usage with bulk fills. For a few hundred rows a month, either is fine. For thousands of rows with model choice and usage reporting, GPT for Work is the more serious tool.
Job 3: “Keep This Dashboard Live From the CRM” — Coefficient
Coefficient is a different kind of product: it pulls live data from your CRM, database, warehouse, or analytics tools into Sheets and refreshes it on a schedule. A sales dashboard that updates itself, a marketing report that never needs a CSV export, a finance sheet that stays in sync with the source system — that is the job. No formula writer does it, and no text generator replaces it.
Pricing starts at $49 a month for Pro, with a free tier for light use. The honest caveat is setup: connecting a source, choosing fields, and setting refresh rules takes longer than installing a formula add-on, and the value only appears when the dashboard is one you would otherwise rebuild by hand every week. If you rebuild one report weekly, Coefficient pays for itself in the first month. If you pull data once a quarter, export the CSV and move on.
Job 4: “What Does This Sheet Say?” — Arcwise
Arcwise is a copilot that reads your whole sheet and answers questions about it in plain language, cleans columns, and suggests formulas with the sheet’s structure as context. The “ask about the sheet” job is real — a messy handover file, a inherited model, a dataset you did not build — and it is the job Gemini’s side panel handles least well, because the side panel works from your prompt rather than from the sheet’s structure.
Pricing is the problem. Third-party listings disagree: one lists Basic at $9 a month and Pro at $29, another lists around $20 a month, a third lists Pro at $29.99. No figure could be verified against a vendor page on draft day, so this article does not present one as fact. Check the live pricing page before buying, and use the free tier to test it on your own messiest sheet first.
What a 5,000-Row Job Costs, Side by Side
| Tool | What you pay for 5,000 rows | Honest caveat |
|---|---|---|
| Gemini (=AI()) | Included in Workspace Standard ($14/user/mo) | Slow past a few hundred rows; row-by-row processing |
| GPT for Work Standard | $25/mo incl. $25 usage; ~$7.50 usage at third-party standard-model rates | Premium models cost ~10x more per row; unused usage does not roll over |
| Numerous.ai Personal | $8/mo (annual) | Token allowance not published on the pages checked — verify before a big job |
| SheetAI Starter → Pro | Starter $12/mo covers ~500 runs; Pro $29/mo soft-unlimited | Starter is too small for 5,000 rows; Pro is the realistic tier |
| Coefficient | From $49/mo | Wrong tool for bulk text work — this is the live-data price |
| Arcwise | Unverified ($9–$30/mo in third-party listings) | Check the live page |
The Verification Protocol: Never Trust an AI Formula Unchecked
AI-written formulas fail quietly. A formula that returns a number is not a formula that returns the right number. Run this check on every AI-written formula before it touches a decision:
- Read the formula. Confirm every cell range points where you think it points. Wrong-range references are the most common failure, especially across tabs.
- Test on a hand-checkable sample. Copy the formula to 5–10 rows you can compute by hand. If any row disagrees with your hand calculation, the formula is wrong, not the sample.
- Test the edge cases. Empty cells, zero values, text where a number should be, dates in two formats. AI formulas routinely assume clean data.
- Check the grain. If the formula aggregates, confirm it aggregates at the right level: orders, not order lines; customers, not transactions. A SUM that counts lines instead of orders inflates the answer silently.
- Replace with values before sharing. Once a formula column is verified, copy it and paste as values before sorting, sharing, or changing the sheet. A live AI formula can recalculate later and change the numbers under you.
Privacy: What Leaves the Sheet
Different tools move your data differently, and the difference matters if your sheet holds customer, employee, or financial data.
- Gemini (bundled) processes data inside Google’s Workspace environment under Workspace’s terms. It is the simplest story for business data.
- GPT for Work sends row contents to model providers through its service. The usage model is the price of bulk work, and sensitive sheets deserve a second thought before being sent row by row to an external model.
- Numerous.ai sends formula inputs to OpenAI via API. OpenAI states API data is not used for model training and is retained for 30 days for abuse monitoring. Numerous caches inputs and outputs on Google Cloud in the United States to speed up refreshes.
- SheetAI’s Free BYOK plan lets you bring your own API key and pay the model provider directly. Your data and keys never touch SheetAI’s servers beyond the call itself, which is the most control any tool on this list offers. The hosted plans trade that control for convenience.
- Coefficient moves data from your business systems into Sheets. That is its job. Check which systems it can read and who on your team can set up a sync before granting access.
If the sheet contains data you would not paste into a public chatbot, do not paste it into an add-on either. Run bulk jobs on a de-identified copy first.
Pick by the Job
| Your job | Pick | Why |
|---|---|---|
| One formula a week | Gemini (already bundled) or a general assistant | No add-on needed |
| Light text work, a few hundred rows | Gemini =AI(), or SheetAI Starter | Included or $12/mo |
| Bulk text work, thousands of rows | GPT for Work Standard | Model choice + usage reporting |
| Bulk work on a tight budget | Numerous.ai Personal / SheetAI Pro | $8–$29/mo |
| Live dashboard from CRM/database | Coefficient | Only tool here that syncs live data |
| Understand/clean a messy sheet | Arcwise (test free tier first) | Context-aware copilot |
| Maximum data control | SheetAI Free BYOK | Your own API key, your own spend |
A note on what this article does not rank: standalone AI spreadsheets (Rows, Sourcetable, and similar) are real products, but they are not Google Sheets tools — they replace Sheets rather than extending it. If you are willing to leave Sheets entirely, they are worth a look. If your team lives in Sheets, the add-ons above are the right comparison.
Frequently Asked Questions
Is there a free AI for Google Sheets?
Yes, in two senses. Gemini is included in Workspace Business Standard and above at no extra charge. SheetAI’s Free BYOK plan is $0 forever for unlimited calls — you pay your model provider directly for what you use. Numerous and GPT for Work both offer free trials.
Is Gemini in Google Sheets free?
It is bundled, not free. Workspace Business Standard is $14 per user per month on annual billing and includes Gemini across Docs, Sheets, Slides, Meet, and Drive. Business Starter at $7 does not include Gemini in Sheets. Personal accounts need a Google One AI plan.
What is the best AI add-on for Google Sheets formulas?
For occasional formulas, Gemini’s side panel. For bulk formula work across many rows, GPT for Work or Numerous. For the cheapest formula help, SheetAI Starter at $12 a month. The formula is rarely the hard part — verification is, and the protocol above applies to all of them.
Can AI in Google Sheets replace Excel analysis tools?
Not for heavy analysis. Sheets AI tools are best at formulas, bulk text work, and light analysis. Deep statistical work, complex financial models, and large datasets still belong in a dedicated analysis tool or in Excel with a purpose-built AI assistant.
Does =AI() work on personal Gmail accounts?
The =AI() function is a Workspace feature. Personal accounts need a Google One AI plan for Gemini features in Sheets. Check your plan before building a workflow on =AI().
Will AI tools in Sheets use my data for training?
It depends on the tool. API-routed tools generally state that API data is not used for training (Numerous cites OpenAI’s API policy). BYOK tools keep the relationship between you and the model provider. Read the privacy terms of any add-on before running it on sensitive data, and de-identify sheets where you can.
The Bottom Line
The best AI tool for Google Sheets is the one that matches your job. One formula a week: use the Gemini you already pay for. Thousands of rows: GPT for Work, budgeted with a 50-row prototype first. A live dashboard: Coefficient, nothing else here. A messy sheet to understand: Arcwise, tested free first. A tight budget: Numerous or SheetAI. And whatever you pick, verify every AI-written formula on a hand-checkable sample before it touches a decision. The spreadsheet that looks right is not the same as the spreadsheet that is right.
Prices verified: October 2026.