Finance AI Index

Index › Vendors › Vertex Corporate Tax · September 2026 Edition

1 category · Named, not ranked

Vertex Corporate Tax

9Judge labels

1First choices

1Negative labels

6 of 12Models named it

1Category

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

Standing

4 labels, too few to rank

A product needs 10 labels in a category before a share or quadrant is stated. Vertex Corporate Tax was named 4 times in Corporate tax provision, where Thomson Reuters ONESOURCE Tax Provision led with 26%. The labels and the evidence are below, counted exactly.

By buyer segmentRead the same way at every buyer size.

Small business85 of 101

under the label threshold

Mid-market26 of 98

under the label threshold

Enterprise11 of 71

under the label threshold

In corporate tax provision · 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 Vertex Corporate Tax 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
Corporate tax provision	Tax and compliance	0%	26 of 98	0%	4	under 10 labels · led by Thomson Reuters ONESOURCE Tax Provision at 26%

Movement

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

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

Direct0 labelsNone

Paraphrase1 label1

Comparative3 labelsNone

Budget-constrained3 labelsNone

Scale-constrained2 labelsNone

Negative0 labelsNone

First choiceAlternativeMentionNegative9 labels in all, every segment counted; 1 of the 1 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.

“Vertex Corporate Tax: Excellent for recurring provisions and multi-entity tracking.” Qwen 3.7 Flash · Corporate tax provision · budget prompt · alternative

“Choose Vertex if you need structured, repeatable close workflows” Kimi K2 · Corporate tax provision · 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.

No model argued against it.

Named alongside

The products named in the same answers as Vertex Corporate Tax, over the 9 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Vertex Corporate Tax was named but was not.

ProductSame answerTook the first choice insteadHead to head

Bloomberg Tax Provision8 of 91Not in the top three

Sovos Tax Provision7 of 91Not in the top three

CCH Tagetik5 of 90Not in the top three

Thomson Reuters ONESOURCE Tax Provision4 of 92Not in the top three

OneStream4 of 90Not in the top three

Thomson Reuters ONESOURCE3 of 90Not in the top three

CSC Corptax2 of 91Not in the top three

Longview Tax2 of 91Not in the top three

Workiva2 of 90Not in the top three

Drake Tax1 of 90Not 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 Vertex Corporate Tax. 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 9 of the 9 answers that named Vertex Corporate Tax and are not a share of its labels.

Domains cited

zipdo.co9

worldmetrics.org8

gitnux.org7

pro.bloombergtax.com5

gartner.com4

rightworks.com3

tax.thomsonreuters.com3

wifitalents.com3

wolterskluwer.com3

capterra.com2

Forty-seven of the forty-seven domain citations in answers naming Vertex Corporate Tax came from somebody else's page.

Pages cited

worldmetrics.org/best/corporate-tax-software7

worldmetrics.org/best/tax-provision-software7

gitnux.org/best/tax-provisioning-software6

worldmetrics.org/best/corp-tax-software5

zipdo.co/best/corporate-tax-software5

gartner.com/reviews/market/tax-software4

pro.bloombergtax.com/insights/tax-solutions/buyers-guide-how-to-find-the-right-tax-provisi4

worldmetrics.org/best/corporate-tax-provision-software4

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 Vertex Corporate Tax'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 Vertex Corporate Tax, 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 vertex.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.