IT AI Index

Index › Vendors › Stellar Cyber Open XDR · September 2026 Edition

1 category · Named, not ranked

Stellar Cyber Open XDR

5Judge labels

0First choices

0Negative labels

3 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

3 labels, too few to rank

A product needs 10 labels in a category before a share or quadrant is stated. Stellar Cyber Open XDR was named 3 times in XDR, where Microsoft Defender XDR led with 63%. The labels and the evidence are below, counted exactly.

By buyer segmentRead the same way at every buyer size.

Small businessnot named

No model named it for this buyer.

Mid-market23 of 61

under the label threshold

Enterprise14 of 47

under the label threshold

In xdr · 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 Stellar Cyber Open XDR 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
Extended detection and response	Security operations	0%	23 of 61	0%	3	under 10 labels · led by Microsoft Defender XDR at 63%

Movement

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

Model	Alternative	Labels
Claude Haiku 4.5	0	0
GPT-5.4 mini	0	0
Gemini 3.5 Flash	0	0
Perplexity Sonar	2	2
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	1	1
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

Direct1 labelNone

Paraphrase1 labelNone

Comparative2 labelsNone

Budget-constrained1 labelNone

Scale-constrained0 labelsNone

Negative0 labelsNone

First choiceAlternativeMentionNegative5 labels in all, every segment counted; 0 of the 0 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.

“the clearest choice if you want a vendor-neutral layer over your existing tools” Perplexity Sonar · XDR · comparative prompt · alternative

“5. Stellar Cyber Open XDR — *Best for Mixed Environments*” Kimi K2 · XDR · paraphrase prompt · alternative

“Best if you want open integration and flexibility” Perplexity Sonar · XDR · direct 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 Stellar Cyber Open XDR, over the 5 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Stellar Cyber Open XDR was named but was not.

ProductSame answerTook the first choice insteadHead to head

Microsoft Defender XDR5 of 53Not in the top three

SentinelOne Singularity4 of 50Not in the top three

Palo Alto Networks Cortex XDR3 of 51Not in the top three

CrowdStrike Falcon Insight XDR3 of 50Not in the top three

CrowdStrike Falcon XDR2 of 52Not in the top three

Cisco XDR2 of 50Not in the top three

Trend Vision One2 of 50Not in the top three

Bitdefender GravityZone XDR1 of 50Not in the top three

Fidelis Elevate1 of 50Not in the top three

Huntress Managed EDR1 of 50Not 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 Stellar Cyber Open XDR. 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 4 of the 5 answers that named Stellar Cyber Open XDR and are not a share of its labels.

Domains cited

cyberpress.org4

gartner.com4

paloaltonetworks.com4

stellarcyber.aiYour site4

cybersecuritynews.com3

cynet.com3

expertinsights.com3

gbhackers.com3

guideflow.com3

guptadeepak.com3

Thirty of the thirty-four domain citations in answers naming Stellar Cyber Open XDR came from somebody else's page.

Pages cited

gartner.com/reviews/market/extended-detection-and-response4

paloaltonetworks.com/cyberpedia/xdr-solutions4

stellarcyber.ai/learn/xdr-solutions4

cybersecuritynews.com/best-xdr-platforms3

expertinsights.com/endpoint-security/the-top-xdr-solutions3

gbhackers.com/best-managed-xdr-compared3

gbhackers.com/best-xdr-platforms-compared3

guideflow.com/blog/xdr-platform3

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 Stellar Cyber Open XDR'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 Stellar Cyber Open XDR, 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 stellarcyber.ai 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.