Index › Tax and compliance › Corporate tax provision › Avalara vs Vertex

Corporate tax provision · September 2026 Edition

Avalara vs Vertex

Zero of twelve models named Avalara first on the direct prompt; zero named Vertex. Avalara was named by nine of the twelve models and Vertex by seven and Avalara carries 11 labels and Vertex 10, so the shares are not directly comparable.

Avalara

criticized challenger

Named in three categories this edition.

Vertex

criticized challenger

Named in three categories this edition.

First-choice share7%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.

Negative rate27%40%Negative labels as a share of the product's labels, 0 to 100.

Rank in category#5#6A position in a field of 9; printed, not drawn.

Labels1110A count; the two differ.

The two percentage rows are drawn on one 0 to 100 track, Avalara reading right to left. Rank and label count are printed, not drawn.Thomson Reuters ONESOURCE Tax Provision was named alongside these two in ten of the twelve direct answers. Thomson Reuters ONESOURCE Tax Provision vs Avalara · Thomson Reuters ONESOURCE Tax Provision vs Vertex · Bloomberg Tax Provision vs Avalara

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve models, for a mid-market B2B company; rank is within the category; every quote names the model and the prompt it came from. Both figures come from the corporate tax provision page.

By framing

How many of the twelve models made each the first choice, per way of asking, and how many argued against it.

AvalaraFirst choices, of twelve modelsVertex

Direct001 against Vertex

Paraphrase312 against Avalara

Comparative00

Budget-constrained003 against Vertex

Scale-constrained00

Negative001 against Avalara

Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.

Across every category in the September 2026 Edition, Avalara and Vertex were named in the same answer thirty-two times, of the 90 answers naming Avalara and the 192 naming Vertex. In those answers Vertex took the first choice seven times and Avalara seven.

Every model, every framing

The seventy-two answers behind the chart above, one cell each: where Avalara and Vertex stood in it.

Model	Direct	Paraphrase	Comparative	Budget-constrained	Scale-constrained	Negative
Claude Haiku 4.5
GPT-5.4 mini
Gemini 3.5 Flash
Perplexity Sonar
Grok 4.1 Fast
Mistral Small
DeepSeek V4 Flash
Llama 4 Maverick
Qwen 3.7 Flash
Kimi K2
GLM 4.7 FlashX
MiniMax M2.5

Avalara

Vertex

first choice

named as an alternative

argued againstblank: not namedEach cell is one answer, Avalara on the left and Vertex on the right.

The direct prompt

The plain question, one answer per model, grouped by where Avalara and Vertex stood in it.

Neither was the first choice, one was named

1 of 12 modelsThe answer put something else first and named one of the two as an alternative.

Llama 4 MaverickThomson Reuters ONESOURCE Tax Provision alternatives: Avalara, CCH Axcess Tax, Taxfyle

Neither was named

11 of 12 modelsThe answer made no first choice from these two in this category.

Claude Haiku 4.5no first choice alternatives: Bloomberg Tax Provision, CSC Corptax, Longview Tax, Thomson Reuters ONESOURCE

GPT-5.4 miniThomson Reuters ONESOURCE Tax Provision alternatives: CCH Axcess/ProSystem fx tax provision offerings, Longview Tax, ONESOURCE Income Tax / Direct Tax Essential

Gemini 3.5 FlashBloomberg Tax Provision alternatives: Exactera Tax Provision, Longview Tax, Thomson Reuters ONESOURCE Tax Provision, Vena Solutions

Perplexity SonarThomson Reuters ONESOURCE Tax Provision alternatives: CSC Corptax, Wolters Kluwer CCH Tagetik Tax Provision & Reporting

Grok 4.1 FastThomson Reuters ONESOURCE Tax Provision alternatives: TaxPoint, Taxfyle, Vertex Tax Accounting

Mistral SmallThomson Reuters ONESOURCE Tax Provision alternatives: Sovos Tax Provision, Vertex Tax Accounting

DeepSeek V4 FlashBloomberg Tax Provision, Thomson Reuters ONESOURCE Tax Provision alternatives: Sovos Tax Provision, Vertex Tax Accounting

Qwen 3.7 FlashLongview Tax alternatives: Bloomberg Tax Provision, CSC Corptax, Thomson Reuters ONESOURCE

Kimi K2Thomson Reuters ONESOURCE Tax Provision alternatives: CCH Tagetik, FloQast Tax Provision, Longview Tax, Lucasys Tax Provision, Sovos Tax Provision

GLM 4.7 FlashXThomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, Longview Tax, Sovos Tax Provision

MiniMax M2.5Bloomberg Tax Provision, Thomson Reuters ONESOURCE Tax Provision alternatives: CCH Tagetik Tax Provision & Reporting, Taxfyle, Vertex Tax Accounting

Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.

By buyer segment

The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.

Small business

Avalara leads by six points.

Avalara#3 of 9

Vertex#– of 9

The full small business standing →

Mid-marketThe figures above

Avalara leads by five points.

Avalara#5 of 9

Vertex#6 of 9

The full mid-market standing →

Enterprise

The order flips: Vertex leads at enterprise.

Vertex#8 of 9

Avalara#– of 9

The full enterprise standing →

What the models said about Avalara

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of three in this category shown.

“Platforms like *Avalara AvaTax*, *TaxJar*, or *Anrok* ... they do not file corporate income taxes” Gemini 3.5 Flash · paraphrase prompt · hard negative

“Automated sales tax tools improperly configured (e.g., Avalara) ... "garbage in, garbage out."” DeepSeek V4 Flash · negative prompt · soft negative

“I would recommend Avalara as the default choice if you need broad, scalable compliance coverage and ERP integration.” Perplexity Sonar · paraphrase prompt · first choice

What the models said about Vertex

Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of three in this category shown.

“Enterprise-focused, indirect tax only (no provision)” Kimi K2 · budget prompt · hard negative

“consider Vertex for indirect tax, but it is not the clearest provision-first choice from the sources I found” GPT-5.4 mini · direct prompt · soft negative

“Corporate income tax (direct tax) | Thomson Reuters ONESOURCE or Vertex” GLM 4.7 FlashX · paraphrase prompt · first choice

Also compared

Thomson Reuters ONESOURCE Tax Provision vs Avalara Thomson Reuters ONESOURCE Tax Provision vs Vertex Bloomberg Tax Provision vs Avalara Bloomberg Tax Provision vs Vertex Thomson Reuters ONESOURCE vs Avalara Thomson Reuters ONESOURCE vs Vertex Longview Tax vs Avalara Longview Tax vs Vertex All fifteen head-to-head pages and the full corporate tax provision standing

Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.