Skip to main content
nexeai

Numerous.ai: our review

Numerous.ai adds AI functions (=AI, =WRITE, =INFER) into your own Excel or Google Sheets, without replacing the spreadsheet. Only the content explicitly passed into those functions goes to OpenAI; the rest of the workbook does not move.

Data in the United StatesFree version, then paid·from $19/month
Go to Numerous.ai's website (opens in a new tab)

What we take away from it

What counts in its favor

  • Installs into your existing Excel or Google Sheets: no migration, no workbook to rebuild elsewhere.
  • Only the cells passed into =AI, =WRITE or =INFER leave the machine; the rest of the workbook is never transmitted.
  • A single declared model provider, OpenAI, which does not train its models on data received through its API.

What counts against it

  • The pricing page shows inconsistent figures from one place to another (500,000 or 1 million characters depending on the section): a sign of loose site upkeep.
  • No data processing agreement (DPA) nor list of sub-processors beyond OpenAI is published, unlike competitors in the same segment.
  • Functions limited to text and formula generation: no connector to another piece of software, no data analysis in the dashboard sense.

An honest option for slipping an occasional AI function into an existing workbook, best reserved for simple text and formula uses. To rule out if the team expects real data analysis or formal contractual guarantees.

The facts

First paid tier
$19/month — Individual, billed monthly ($8 billed annually)
Data hosting
Data in the United States · source
Categories
Spreadsheets
Data verified on
30 July 2026

What happens to your data

Is your data used to train their models?
Subprocessors
The only declared model provider is OpenAI, through its API. The privacy policy states that OpenAI does not use data submitted via API to train its models, and keeps it for a maximum of 30 days for anti-abuse purposes. Numerous.ai states it only stores content explicitly passed into its functions (=AI, =WRITE, =INFER): the rest of the workbook is neither read nor transmitted. No other AI sub-processor is mentioned, and no public DPA was found.
Retention
Responses are cached in a database hosted on Google Cloud in the United States, to speed up formula refreshes. OpenAI keeps requests for 30 days before deletion.

Numerous.ai in detail

Numerous.ai isn't a spreadsheet: it's an add-in that brings AI functions into the Excel or Google Sheets you already use. Once installed, a cell can call =AI(), =WRITE() or =INFER() the way it would call SUM() or VLOOKUP(), to generate text, rephrase a piece of data or infer a category.

What it actually does

The typical use fits in one line: a column of customer feedback, an =AI() function asking "summarise this comment in one sentence", and the formula copies down every row like any other spreadsheet formula. The tool also handles generating standard formulas from an instruction written in plain language, and caches answers to avoid paying for an identical call again on every recalculation.

Why it interests us (or not)

The angle that matters for an SME is the exact scope of what leaves the workstation. Unlike a spreadsheet app that replaces Excel, Numerous.ai doesn't touch the whole workbook: only the cell explicitly passed into an AI function is sent to OpenAI, the sole declared provider. A payroll sheet can therefore coexist with the tool as long as no AI formula calls the sensitive columns. That's a useful guarantee, but it rests on the user's discipline: nothing technically stops someone from calling =AI() on a salary column. See our training page for the part that's precisely about setting rules for these uses as a team.

Where it falls short

Two serious reservations before rolling the tool out widely.

The first is the quality of public information. The pricing page shows, depending on the spot, either 500,000 or 1 million characters for the same tier — a sign of a site that hasn't been updated consistently after a plan change. That's not a dealbreaker, but it calls for checking the real quota at the time of payment rather than trusting the first page read.

The second is the absence of any public contractual document: no DPA, no list of subprocessors beyond OpenAI. For strictly personal use or a small team, that's tolerable. For a company that must document its subprocessors in its GDPR register, it's a gap to fill with a direct email to the publisher before any deployment.

Our recommendation

Numerous.ai suits anyone who wants an occasional AI function in an existing workbook, for text or a formula, without switching tools or training the team on a new spreadsheet app. For deeper data analysis or a formal contractual guarantee, better to look at a tool that documents its subprocessors and offers a public DPA.

Who it's for, and who it isn't

Suited for

  • Freelancer or small team that wants to keep Excel or Google Sheets and add an occasional AI function without switching tools
  • Repetitive text use in a cell: categorize, summarize, rephrase, generate a formula
  • Organization that accepts a single provider, OpenAI, processing the cells concerned

Not a fit

  • Company that requires a signed DPA and a list of sub-processors before sending any data
  • Team that needs to analyze volumes of data or connect external sources: that is not what the tool does
  • User who needs a French interface

Frequently asked questions

Does Numerous.ai replace Excel or Google Sheets?
No. It's a module that installs into your existing Excel or Google Sheets and adds functions (=AI, =WRITE, =INFER) usable in a cell like any other formula. The workbook stays yours, in your usual environment.
Does the content of my cells go to the vendor?
Only what is explicitly passed into an AI function leaves the machine, to OpenAI. A cell that holds sensitive data but is never called by =AI, =WRITE or =INFER is neither read nor transmitted by the tool.
How much does Numerous.ai cost for individual use?
The Individual tier costs 19 $ per month billed monthly, or 8 $ per month billed yearly, for a single-user use. A 7-day trial is offered before commitment.
What's the difference with Formula Bot?
Both add AI into Excel and Google Sheets through an in-cell function. Formula Bot has gone further into data analysis and automated dashboards; Numerous.ai stays focused on text and formula generation, with a narrower but simpler scope.
Do you need to know how to code to use it?
No: usage is limited to writing a function in a cell, like any other spreadsheet formula. No line of code is needed for common uses.

Alternatives to Numerous.ai

Spreadsheets · Data analysis

Bricks

AI assistant that builds dashboards, reports and visualizations from raw data.

Free version, then paid·from $25/month
Official website (opens in a new tab)

Our sources

Prices and hosting terms change often. We recheck them periodically, but the publisher's page remains the only up-to-date reference.

Is Numerous.ai the right choice for you?

We measure this tool against your real constraints — budget, privacy, your team's skill level — before you sign an annual subscription.

Book a call