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Likely adds formulas to Google Sheets and Excel that answer a question about each cell with a number you can sort on.

Install for Google Sheets

Open a spreadsheet, then Extensions → Add-ons → Get add-ons, and search for Likely.
Install it, then open Extensions → Likely → Open.
Enter your email to get a free key, or paste a key you already have. The key is saved in that spreadsheet.

Install for Excel

In Excel (web, Windows or Mac), go to Home → Add-ins and search for Likely.
Add it, then click the Likely button on the Home tab to open the pane.
Get a free key or paste yours. It's saved for Likely on that device.

Formulas

Google Sheets	Excel	Returns
`=LIKELY(range, question)`	`=LIKELY.IS(range, question)`	Probability from 0 to 1 that the question is true for each cell
`=LIKELY_CHOICE(range, question, labels, [with_confidence])`	`=LIKELY.CHOICE(range, question, labels, [with_confidence])`	The best label for each cell. With `TRUE`, adds a confidence column
`=LIKELY_SCORE(range, question, levels)`	`=LIKELY.SCORE(range, question, levels)`	A score from 0 (first level) to n−1 (last level)

labels and levels can be a range (e.g. Labels!A1:A6) or a comma-separated list ("billing, technical, sales"). Levels go from lowest to highest.

=LIKELY(A2:A500, "Is the customer asking for a refund?")
=LIKELY_CHOICE(A2:A500, "Which team should handle this?", "billing, technical, sales")
=LIKELY_SCORE(A2:A500, "How upset is the customer?", "Calm, Annoyed, Furious")

Pass a whole column range rather than filling a formula down: one formula over a range is one request, and the results spill into the cells below. In Excel, filled-down single-cell formulas also work, since Likely groups them automatically.

Bulk run

Formulas take up to 5,000 cells per range. For bigger columns, select the column and use Bulk run in the Likely panel. It writes plain values into the first empty column on the right, so nothing recalculates and there are no timeouts. Choice runs also write a confidence column.

Tools

Highlight uncertain adds a conditional format that marks probabilities between 0.35 and 0.65 in the selection. Those are the rows worth a human look.
Freeze to values replaces formulas in the selection with their current results.

Writing good questions

Ask one thing. "Is the customer asking for a refund?" beats "Is this a refund or a complaint about billing?". Use two columns for two questions.
Be literal. Say exactly what counts: "Does the message ask for money back (a refund, reversal or chargeback)?"
For labels, cover everything. Add an other label if some cells fit none of yours, because Likely always picks one.
For scales, describe each level. "Calm, Annoyed, Furious" works better than "1, 2, 3".
Use 0.5 as "unsure", not "medium". A probability near 0.5 means the text could go either way.

What counts as a row

Each non-empty cell judged for a question is one row. Blank cells are free. If Likely has already answered the same text for the same question, the answer comes from cache and is also free. Cells longer than 8,000 characters are judged on their first 8,000.

Limits

Rows per month	Free 2,000 · Pro 250,000 · Team 2,000,000
Cells per formula	5,000 (use Bulk run for more)
Cells per bulk run	200,000
Labels per choice	2 to 50
Levels per scale	2 to 10

Errors

No Likely key: open the Likely panel and add a key.
Monthly row quota exceeded: upgrade from the panel, or wait for next month. Cached answers keep working.
Busy, try again: the model was briefly overloaded. Recalculate, or rerun the bulk run.

API

The same engine is available over HTTP with your key:

curl https://getlikely.app/v1/judge \
  -H "X-Likely-Key: lk_…" -H "Content-Type: application/json" \
  -d '{"kind":"probability","question":"Is this a refund request?","values":["Refund me please","Love it"]}'

kind is probability (0 to 1), choice (with labels) or score (with levels). The response has one result per value, or null for empty values.