GTM AI Index
Index Vendors › Five9 · September 2026 Edition
2 categories · Ranked

Five9

66Judge labels
7First choices
17Negative labels
12 of 12Models named it
2Categories
September 2026 Edition. Every number here is derived from the raw labels under vendor table v2026-09-16.3, every buyer segment counted.
Best standing
13% in Dialers for enterprise buyers
Rank 23 of 76 in the mid-market standingcriticized challenger
0 of 12 models made it the first choice on the direct prompt; 30% of its 10 labels there were negative.
By buyer segmentStrongest at enterprise.
In dialers · 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 Five9 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
Sales dialers and callingSales0%23 of 7630%10criticized challenger
Conversational intelligence and call recordingSales0%57 of 930%1under 10 labels · led by Avoma at 52%

Movement

This is the first edition on this tier, so no move can be computed for Five9 yet. The next is due October 1, 2026. 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 Five9 across every prompt where it was named for a mid-market B2B company. Twelve models, six prompts per category.
ModelFirst choiceAlternativeMentionNegativeLabels
Claude Haiku 4.500101
GPT-5.4 mini00000
Gemini 3.5 Flash00000
Perplexity Sonar00101
Grok 4.1 Fast01012
Mistral Small00000
DeepSeek V4 Flash01113
Llama 4 Maverick00000
Qwen 3.7 Flash00101
Kimi K201012
GLM 4.7 FlashX01001
MiniMax M2.500000

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
Direct7 labels3
Paraphrase8 labels2
Comparative22 labels3not counted in share
Budget-constrained11 labels1
Scale-constrained5 labels1
Negative13 labels2not counted in share
First choiceAlternativeMentionNegative66 labels in all, every segment counted; 7 of the 12 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.

“Five9 and Convoso are best for large enterprises with complex compliance needs.” GLM 4.7 FlashX · Dialers · comparative prompt · alternative
“Best for: Enterprise contact centers with complex compliance needs” Kimi K2 · Dialers · comparative prompt · alternative
“Deepest predictive/progressive dialing reputation, full CCaaS depth.” DeepSeek V4 Flash · Dialers · comparative prompt · alternative
“Best enterprise predictive for large centers (50+ seats)” Grok 4.1 Fast · Dialers · 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.

“Dialers to Be Most Cautious About ### 1. Five9 Biggest concerns: Dropped calls, outdated/confusing admin interface, slow implementation, aggressive billing” DeepSeek V4 Flash · Dialers · negative prompt · hard negative
“Five9: Lower G2 rating (4.1/5); best for enterprises but potentially clunky for smaller sales teams.” Grok 4.1 Fast · Dialers · negative prompt · soft negative
“Five9 — *Caution: Enterprise Complexity & Hidden Costs*” Kimi K2 · Dialers · negative prompt · soft negative

Named alongside

The products named in the same answers as Five9, over the 66 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Five9 was named but was not.
ProductSame answerTook the first choice insteadHead to head
CloudTalk39 of 662Not in the top three
Orum36 of 667Not in the top three
NICE CXone33 of 663Not in the top three
Dialpad27 of 662Not in the top three
Aloware26 of 6612Not in the top three
JustCall25 of 661Not in the top three
Nooks23 of 666Not in the top three
Aircall23 of 661Not in the top three
Talkdesk22 of 660Not in the top three
Convoso21 of 660Not 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 Five9. 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 11 of the 66 answers that named Five9 and are not a share of its labels.

Domains cited

cloudtalk.io9
aloware.com7
justcall.io7
croclub.com6
trellus.ai6
skipcall.io5
marketbetter.ai4
nooks.ai4
fastcall.com3
guideflow.com3

Fifty-four of the fifty-four domain citations in answers naming Five9 came from somebody else's page.

Pages cited

Pages are listed as the models cited them.

The company

Five9 Inc. is the company behind Five9.
Website
five9.com
Headquarters
San Ramon, United States
Founded
2001
Ownership
Public, FIVN on Nasdaq

From Wikidata, fetched September 14, 2026. These describe the company, not the product's standing, and a claimed page can dispute any of them. · Wikidata · Crunchbase

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 Five9'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 Five9, 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 five9.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.