Finance AI Index

Index › Vendors › Stax · September 2026 Edition

2 categories · Named, not ranked

Stax

19Judge labels

4First choices

2Negative labels

8 of 12Models named it

2Categories

September 2026 Edition. Every number here is derived from the raw labels under vendor table vv2026-09.2, every buyer segment counted.

Standing

7 labels, too few to rank

A product needs 10 labels in a category before a share or quadrant is stated. Stax was named 7 times in B2B payment acceptance and 1 other category, where Helcim led with 17%. The labels and the evidence are below, counted exactly.

By buyer segmentStrongest at enterprise.

Small business40 of 66

under the label threshold

Mid-market27 of 91

under the label threshold

Enterprise5 of 88

under the label threshold

In b2b payment acceptance · each standing computed within its segment · bars are 0 to 100 · the accent bar is the product's own best reading

Standing by category

Every category where a model named Stax for a mid-market B2B company. Share is first choices across the direct, paraphrase, budget and scale prompts; rank is within every product named in that category.

Category	Function	Share	Rank	Negative rate	Labels	Quadrant
B2B payment acceptance	Receivables and billing	0%	27 of 91	17%	6	under 10 labels · led by Helcim at 17%
Invoicing software	Receivables and billing	0%	64 of 86	0%	1	under 10 labels · led by Wave at 19%

Movement

This is the first edition on this tier, so no move can be computed for Stax yet. From the next edition this section shows, per buyer segment, whether its share moved by more than the measured noise floor.

By model

How each model treated Stax across every prompt where it was named for a mid-market B2B company. Twelve models, six prompts per category.

Model	Alternative	Mention	Negative	Labels
Claude Haiku 4.5	0	0	0	0
GPT-5.4 mini	0	0	0	0
Gemini 3.5 Flash	0	0	0	0
Perplexity Sonar	0	0	0	0
Grok 4.1 Fast	0	2	0	2
Mistral Small	0	0	0	0
DeepSeek V4 Flash	1	1	1	3
Llama 4 Maverick	0	0	0	0
Qwen 3.7 Flash	0	1	0	1
Kimi K2	1	0	0	1
GLM 4.7 FlashX	0	0	0	0
MiniMax M2.5	0	0	0	0

By framing

Which of the six questions produced the naming. By model says how often; this says asked what. The first-choice count on the right carries the marks of the models that produced it.

FramingLabels by classFirst choices

Direct1 labelNone

Paraphrase0 labelsNone

Comparative3 labelsNone

Budget-constrained8 labels4

Scale-constrained3 labelsNone

Negative4 labelsNone

First choiceAlternativeMentionNegative19 labels in all, every segment counted; 4 of the 4 first choices count toward share, since the comparative and negative framings do not. The bar is one segment per label class, to scale within the framing.

What the models said for it

Verbatim evidence the judge attached to positive labels.

“High-volume card processing on transparent pricing: Stax or Helcim” DeepSeek V4 Flash · B2B payment acceptance · comparative prompt · alternative

“Best for: High-volume B2B businesses” Kimi K2 · B2B payment acceptance · comparative prompt · alternative

And against it

Verbatim evidence attached to negative labels. A warning on a product with few labels is a warning; on a product with many, it is one voice among them.

“Medium caution | 54 BBB complaints in 3 years; mix of fund holds and unexpected fees” DeepSeek V4 Flash · B2B payment acceptance · negative prompt · soft negative

Named alongside

The products named in the same answers as Stax, over the 19 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Stax was named but was not.

ProductSame answerTook the first choice insteadHead to head

Stripe16 of 193Not in the top three

Helcim15 of 194Not in the top three

BILL11 of 190Not in the top three

Adyen8 of 192Not in the top three

Melio7 of 191Not in the top three

HighRadius5 of 191Not in the top three

Airwallex5 of 190Not in the top three

Authorize.net5 of 190Not in the top three

Braintree4 of 190Not in the top three

Wise Business4 of 190Not in the top three

A head-to-head page exists where both products are in a category's top three. The other rows are the same fact without a page behind them, so they link to the product instead.

What carried it into the answer

The sites and pages cited by the answers that named Stax. A fact about retrieval, not a lever on the model.

Citations exist only for the models that return a source list, four of the twelve in this edition, so these counts come from 19 of the 19 answers that named Stax and are not a share of its labels.

Domains cited

techrepublic.com15

connectpay.com12

gartner.com12

highradius.com8

fitsmallbusiness.com7

nerdwallet.com7

worldmetrics.org7

factura.ai6

mypayadvisor.com6

photonpay.com6

Eighty-six of the eighty-six domain citations in answers naming Stax came from somebody else's page.

Pages cited

techrepublic.com/article/best-b2b-payment-processors15

connectpay.com/blog/b2b-payment-platforms12

gartner.com/reviews/market/b2b-payments-software12

fitsmallbusiness.com/best-b2b-payment-solutions7

worldmetrics.org/service/b2b-payment7

factura.ai/b2b-payment-platforms-small-businesses6

highradius.com/resources/Blog/best-b2b-payment-platforms6

triple-a.io/blog/best-b2b-payment-solutions6

Pages are listed as the models cited them.

Names read as Stax

What the judge wrote, as written, with how often. The vendor table decides that these count as Stax; a claim can dispute any of them.

Stax Payments 1Stax/Sage 1

Is this your product?

Claim this page

Claiming is free and changes nothing in the data. A claimed page shows a verified contact who is told when each edition publishes and when Stax's standing changes by more than the noise floor; the right to propose corrections to the vendor table, meaning names the judge wrote that should or should not read as Stax, applied by version and listed in the change log; and a one-line description supplied by the vendor and marked as such.

It does not get any change to labels, shares or verdicts, any preview, or any say over which quotes appear. A verification link goes to your work email; an address at staxpayments.com is approved on the spot, any other address is reviewed by hand.

Your name and company appear on the claimed page, or the company alone if you ask below. A title and a LinkedIn address appear there too if you give them, and are left off if you do not. Your email address is never published.