IT AI Index

Index › Vendors › NATS JetStream · September 2026 Edition

1 category · Named, not ranked

NATS JetStream

22Judge labels

0First choices

6Negative labels

10 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

5 labels, too few to rank

A product needs 10 labels in a category before a share or quadrant is stated. NATS JetStream was named 5 times in Streaming, where Confluent Cloud led with 32%. The labels and the evidence are below, counted exactly.

By buyer segmentRead the same way at every buyer size.

Small business17 of 88

under the label threshold

Mid-market53 of 78

under the label threshold

Enterprise45 of 47

under the label threshold

In streaming · 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 NATS JetStream 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
Streaming platforms	Data platform	0%	53 of 78	40%	5	under 10 labels · led by Confluent Cloud at 32%

Movement

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

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

Direct4 labelsNone

Paraphrase0 labelsNone

Comparative5 labelsNone

Budget-constrained3 labelsNone

Scale-constrained2 labelsNone

Negative8 labelsNone

First choiceAlternativeMentionNegative22 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.

“NATS JetStream (The "Lightweight Champion") ... can easily run on a tiny, $5-to-$10/month VM” Gemini 3.5 Flash · Streaming · budget prompt · alternative

“Migrate to JetStream which is built into the core NATS server.” Kimi K2 · Streaming · negative prompt · alternative

“Choose NATS JetStream for low‑latency, lightweight messaging.” GLM 4.7 FlashX · Streaming · 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.

“Avoid: NATS / JetStream (For Heavy Streaming Workloads)” Qwen 3.7 Flash · Streaming · negative prompt · hard negative

“better treated as redesign choices than drop-in Kafka replacements” Perplexity Sonar · Streaming · negative prompt · soft negative

Named alongside

The products named in the same answers as NATS JetStream, over the 22 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and NATS JetStream was named but was not.

ProductSame answerTook the first choice insteadHead to head

Redpanda19 of 228Not in the top three

Apache Kafka18 of 226Not in the top three

Amazon Kinesis Data Streams17 of 220Not in the top three

Confluent Cloud16 of 227Not in the top three

Apache Pulsar16 of 220Not in the top three

Google Cloud Pub/Sub14 of 220Not in the top three

Azure Event Hubs12 of 220Not in the top three

Amazon MSK9 of 222Not in the top three

Aiven for Apache Kafka8 of 221Not in the top three

RabbitMQ7 of 221Not 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 NATS JetStream. 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 19 of the 22 answers that named NATS JetStream and are not a share of its labels.

Domains cited

devopsschool.com15

gartner.com12

guideflow.com12

automq.com11

estuary.dev9

risingwave.com7

tinybird.co7

confluent.io6

cotocus.com6

gravitee.io6

Ninety-one of the ninety-one domain citations in answers naming NATS JetStream came from somebody else's page.

Pages cited

devopsschool.com/blog/top-10-event-streaming-platforms-features-pros-cons-comparison12

guideflow.com/blog/event-streaming-software12

gartner.com/reviews/market/event-stream-processing11

automq.com/blog/top-10-event-streaming-platforms-confluent-msk-redpanda-alternatives10

devopsschool.com/blog/top-10-event-streaming-platforms-tools-in-2025-features-pros-cons-co7

estuary.dev/blog/kafka-alternatives7

cotocus.com/blog/top-10-event-streaming-platforms-features-pros-cons-comparison6

gravitee.io/blog/best-event-streaming-solutions6

Pages are listed as the models cited them.

Names read as NATS JetStream

What the judge wrote, as written, with how often. The vendor table decides that these count as NATS JetStream; a claim can dispute any of them.

NATS / JetStream 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 NATS JetStream'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 NATS JetStream, 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 nats.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.