Last updated 06-30-2026
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Numerous.ai
Numerous.ai is a spreadsheet add-on that brings ChatGPT into Google Sheets and Microsoft Excel. You install the plugin, type formulas like =AI in any cell, and run language tasks across rows and columns without managing your own API keys.
The product is built around bulk spreadsheet workflows: summarizing survey responses, generating ad copy, cleaning messy user input, or prototyping prompts you can share with a team. Responses are cached so formula refreshes do not burn through tokens on duplicate queries.
It fits marketers running campaign research, content teams batching social posts, students organizing research data, and product teams testing prompt structures before shipping features. The team is US-based in San Francisco, and both the Google Sheets and Excel add-ins are listed in their respective official marketplaces.
No API keys to configure; install the add-on and start using =AI in cells
Custom =AI, =WRITE, and =INFER functions for generation, formulas, and pattern learning
Works in both Google Sheets and Microsoft Excel from one subscription
Caches AI responses so refreshes skip duplicate queries and save tokens
Personal plan includes 1 million characters; Pro includes 5 million
Pro and Enterprise plans let multiple teammates share the same subscription
Runs ChatGPT tasks directly inside spreadsheet cells with simple =AI formulas.
No separate OpenAI API key setup; the add-on handles provider access.
Response caching cuts duplicate token usage when sheets refresh formulas.
Same subscription covers both Google Sheets and Microsoft Excel.
Listed in official Google Workspace and Microsoft AppSource marketplaces.
Usage is metered by character limits rather than unlimited generations.
Enterprise pricing requires a 5-user minimum on the public plan page.
Spreadsheet-only workflow; no standalone web app for non-sheet tasks.
Does Numerous.ai require an OpenAI API key?
No. Numerous.ai does not require you to bring your own API keys. You install the Google Sheets add-on or Excel add-in, and the service routes requests to its AI partners on your behalf.
Which spreadsheet apps does Numerous.ai support?
Numerous.ai works in Google Sheets and Microsoft Excel. Paid plans explicitly include use in both platforms, and the add-ins are distributed through the Google Workspace Marketplace and Microsoft AppSource.
What spreadsheet functions does Numerous.ai add?
Numerous.ai exposes custom functions including =AI for general language tasks, =WRITE for content generation, and =INFER to teach the model patterns from examples in your sheet. You call them like any other spreadsheet formula.
How much does Numerous.ai cost?
Numerous.ai lists Personal at $8 per month billed yearly, Pro at $24 per month billed yearly, and Enterprise at $8 per user per month billed yearly with a 5-user minimum. New subscribers can start with a 7-day trial for $1.
How does Numerous.ai handle data sent to AI models?
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.ai caches formula inputs and outputs on Google Cloud in the United States to speed up sheet refreshes.
Can I cancel my Numerous.ai subscription?
Yes. Numerous.ai lets you cancel anytime through its billing portal at api.numerous.ai/portal or by emailing [email protected]. The site states remaining tokens stay available after cancellation, and uncanceled renewals are not refunded.