Finance AI Index
Index Vendors › Thomson Reuters ONESOURCE Tax Provision · September 2026 Edition
Thomson Reuters · 1 category · Ranked

Thomson Reuters ONESOURCE Tax Provision

83Judge labels
31First choices
13Negative labels
12 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.
Best standing
43% in Corporate tax provision for enterprise buyers
Rank 1 of 98 in the mid-market standingaccepted challenger
9 of 12 models made it the first choice on the direct prompt; 15% of its 33 labels there were negative.
By buyer segmentStrongest at enterprise.
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 Thomson Reuters ONESOURCE Tax Provision 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.
CategoryFunctionShareRankNegative rateLabelsQuadrant
Corporate tax provisionTax and compliance26%1 of 9815%33accepted challenger

Movement

This is the first edition on this tier, so no move can be computed for Thomson Reuters ONESOURCE Tax Provision 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 Thomson Reuters ONESOURCE Tax Provision across every prompt where it was named for a mid-market B2B company. Twelve models, six prompts per category.
ModelFirst choiceAlternativeMentionNegativeLabels
Claude Haiku 4.510001
GPT-5.4 mini20002
Gemini 3.5 Flash12036
Perplexity Sonar10113
Grok 4.1 Fast11013
Mistral Small10203
DeepSeek V4 Flash30003
Llama 4 Maverick10203
Qwen 3.7 Flash00101
Kimi K211002
GLM 4.7 FlashX20002
MiniMax M2.520204

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
Direct25 labels21
Paraphrase1 label1
Comparative30 labels15not counted in share
Budget-constrained12 labels4
Scale-constrained10 labels5
Negative5 labelsNone
First choiceAlternativeMentionNegative83 labels in all, every segment counted; 31 of the 46 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.

“For most mid-market B2B companies, ONESOURCE Tax Provision is the safest choice due to its balance of power, audit readiness, and scalability.” Kimi K2 · Corporate tax provision · direct prompt · first choice
“Leading solution for automating ASC 740 tax provision calculations, ETR analysis, and financial disclosures with robust integrations” Claude Haiku 4.5 · Corporate tax provision · comparative prompt · first choice
“OTP is the market-heavyweight software.... Best For: Large, multinational corporations seeking an end-to-end global tax ecosystem.” Gemini 3.5 Flash · Corporate tax provision · comparative prompt · first choice
“I'd recommend starting with ONESOURCE or Bloomberg Tax Provision as they specifically target mid-market needs” MiniMax M2.5 · Corporate tax provision · direct prompt · first choice

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.

“mid-market enterprises or lean tax teams (fewer than 5–10 people) should approach them with caution” Gemini 3.5 Flash · Corporate tax provision · negative prompt · soft negative
“these systems may represent more cost, complexity, and implementation friction than you need” Gemini 3.5 Flash · Corporate tax provision · scale prompt · soft negative
“routinely costs between $50,000 and $100,000+ annually in licensing and implementation fees” Gemini 3.5 Flash · Corporate tax provision · budget prompt · soft negative
“strong for multinational provision and compliance, but not presented as a low-cost choice” Perplexity Sonar · Corporate tax provision · budget prompt · soft negative

Named alongside

The products named in the same answers as Thomson Reuters ONESOURCE Tax Provision, over the 82 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Thomson Reuters ONESOURCE Tax Provision was named but was not.
ProductSame answerTook the first choice insteadHead to head
Longview Tax44 of 820Not in the top three
Sovos Tax Provision40 of 824Not in the top three
CSC Corptax34 of 821Not in the top three
Oracle Tax Reporting16 of 820Not in the top three
Workiva15 of 821Not in the top three
OneStream Tax Provision12 of 820Not in the top three
Vertex Tax Accounting12 of 820Not in the top three
CCH Tagetik10 of 820Not in the top three
Vertex8 of 820Not 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 Thomson Reuters ONESOURCE Tax Provision. 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 70 of the 82 answers that named Thomson Reuters ONESOURCE Tax Provision and are not a share of its labels.

Domains cited

zipdo.co53
worldmetrics.org48
gitnux.org44
wifitalents.com39
tax.thomsonreuters.comYour site38
pro.bloombergtax.com29
cbh.com21
gartner.com18
rightworks.com18
viewpointanalysis.com17

287 of the 325 domain citations in answers naming Thomson Reuters ONESOURCE Tax Provision came from somebody else's page.

Pages cited

Pages are listed as the models cited them.

Names read as Thomson Reuters ONESOURCE Tax Provision

What the judge wrote, as written, with how often. The vendor table decides that these count as Thomson Reuters ONESOURCE Tax Provision; a claim can dispute any of them.
ONESOURCE Tax Provision 9ONESOURCE Tax Provision (Thomson Reuters) 4Thomson Reuters ONESOURCE Tax Provision (OTP) 4ONESOURCE Tax Provision (OTP) 1ONESOURCE Tax Provision (Wolters Kluwer) 1ONESOURCE Tax Provision Starter 1ONESOURCE Tax Provision by Thomson Reuters 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 Thomson Reuters ONESOURCE Tax Provision'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 Thomson Reuters ONESOURCE Tax Provision, 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 thomsonreuters.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.

Subscribe to the pack