Every category where a model named Rex 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
Cash application	Receivables and billing	0%	25 of 83	0%	7	under 10 labels · led by HighRadius at 16%
B2B credit management	Receivables and billing	0%	27 of 82	17%	6	under 10 labels · led by Tesorio at 16%

Movement

This is the first edition on this tier, so no move can be computed for Rex 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 Rex across every prompt where it was named for a mid-market B2B company. Twelve models, six prompts per category.

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

Direct8 labels1

Paraphrase2 labelsNone

Comparative18 labels2not counted in share

Budget-constrained1 labelNone

Scale-constrained1 labelNone

Negative4 labelsNone

First choiceAlternativeMentionNegative34 labels in all, every segment counted; 1 of the 3 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.

“Rex * Best for: Continuous ledger monitoring and tracking payment behavior.” Gemini 3.5 Flash · B2B credit management · comparative prompt · first choice

“Tools like Rex, Monk, or Stuut tend to receive fewer complaints about implementation friction and pricing transparency” Qwen 3.7 Flash · Cash application · negative prompt · alternative

“Watches every account on the ledger in real time... Not a bureau; best paired with external data” GLM 4.7 FlashX · B2B credit management · comparative prompt · alternative

“Rex positions itself as an "agent" that runs the whole cycle autonomously” Qwen 3.7 Flash · Cash application · 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.

“Watch out for: Not a bureau—you need to pair it with external data for brand-new customers.” DeepSeek V4 Flash · B2B credit management · comparative prompt · soft negative

Named alongside

The products named in the same answers as Rex, over the 34 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Rex was named but was not.

ProductSame answerTook the first choice insteadHead to head

Esker26 of 340Not in the top three

Billtrust19 of 340Not in the top three

HighRadius18 of 3411Not in the top three

BlackLine Cash Application14 of 340Not in the top three

HighRadius Credit Cloud13 of 346Not in the top three

Bectran13 of 341Not in the top three

Versapay13 of 340Not in the top three

Serrala10 of 341Not in the top three

Creditsafe10 of 340Not in the top three

D&B Finance Analytics7 of 340Not 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 Rex. 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 32 of the 34 answers that named Rex and are not a share of its labels.

Domains cited

rex.inc32

highradius.com27

worldmetrics.org20

chaserhq.com17

cashbook.com15

creditpulse.com14

upflow.io14

nuvo.com13

bluecopa.com12

esker.com10

No domain is on file for Rex, so its own site is not marked.

Pages cited

rex.inc/resources/comparisons/best-cash-application-software18

highradius.com/resources/Blog/best-cash-application-automation-tools16

cashbook.com/best-cash-application-tools-2026-official-guide14

rex.inc/resources/comparisons/best-credit-management-software14

upflow.io/software/best-cash-application-software14

creditpulse.com/blog/best-credit-management-software13

nuvo.com/resources/credit-management-software13

bluecopa.com/blog/cash-application-softwares11

Pages are listed as the models cited them.

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 Rex'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 Rex, 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 the vendor's own domain 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.