GTM AI Index

Index › Vendors › Vyper · September 2026 Edition

1 category · Named, not ranked

Vyper

7Judge 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 v2026-09-16.3, every buyer segment counted.

Standing

1 label, too few to rank

A product needs 10 labels in a category before a share or quadrant is stated. Vyper was named 1 time in Referrals, where PartnerStack led with 19%. The labels and the evidence are below, counted exactly.

By buyer segmentRead the same way at every buyer size.

Small business28 of 78

under the label threshold

Mid-market20 of 107

under the label threshold

Enterprisenot named

No model named it for this buyer.

In referrals · 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 Vyper 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
Referral and partner programs	Partner and channel	2%	20 of 107	0%	1	under 10 labels · led by PartnerStack at 19%

Movement

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

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

Comparative3 labelsNone

Budget-constrained2 labels1

Scale-constrained0 labelsNone

Negative1 labelNone

First choiceAlternativeMentionNegative7 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.

“Vyper - Vyper is free to use, and you'll only be charged when you opt to start your referral campaign” Claude Haiku 4.5 · Referrals · budget 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.

No model argued against it.

Named alongside

The products named in the same answers as Vyper, over the 7 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Vyper was named but was not.

ProductSame answerTook the first choice insteadHead to head

ReferralCandy5 of 72Not in the top three

Referral Rock4 of 71Not in the top three

Lootly4 of 70Not in the top three

Referral Factory4 of 70Not in the top three

Friendbuy3 of 70Not in the top three

Talkable3 of 70Not in the top three

Loyally.ai2 of 71Not in the top three

Smile.io2 of 71Not in the top three

Birdeye2 of 70Not in the top three

GrowSurf2 of 70Not 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 Vyper. 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 1 of the 7 answers that named Vyper and are not a share of its labels.

Domains cited

blossu.com1

capterra.com1

growthmarketingpro.com1

itsfundoingmarketing.com1

linkjolt.io1

logicalcommander.com1

thecmo.com1

Seven of the seven domain citations in answers naming Vyper came from somebody else's page.

Pages cited

blossu.com/blog/best-referral-program-software1

capterra.com/referral-software/s/free1

growthmarketingpro.com/referral-program-software1

itsfundoingmarketing.com/software/best-referral-marketing-software1

linkjolt.io/blog/best-referral-marketing-software1

logicalcommander.com/post/best-referral-program-software-11

thecmo.com/tools/referral-marketing-software1

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 Vyper'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 Vyper, 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 vyper.io 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.