Every category where a model named Langfuse 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	Since September 2026
LLM gateways and observability	Data platform	0%	16 of 69	0%	10	accepted challenger	▼−9Since September 2026: 9% → 0%, −9 points. Inside the 11-point floor: within noise. Read over the models both editions asked.
AI governance platforms	Data platform	0%	31 of 135	0%	3	under 10 labels · led by Credo AI at 18%
AI security platforms	Security operations	0%	172 of 233	0%	1	under 10 labels · led by SentinelOne Singularity at 11%

Movement

Since September 2026, Langfuse held within the floor in all three categories: no change cleared 11 points.

Best category · LLM gateways · by segment

Small business▼−10Since September 2026: 10% → 0%, −10 points. Inside the 11-point floor: within noise. Read over the models both editions asked.

0%from 10% in September 2026

Inside the floor by 1 pointRank 5 → 11 of 51

Mid-market▼−9Since September 2026: 9% → 0%, −9 points. Inside the 11-point floor: within noise. Read over the models both editions asked.

0%from 9% in September 2026

Inside the floor by 2 pointsRank 4 → 15 of 54

Enterprise▼−4Since September 2026: 4% → 0%, −4 points. Inside the 11-point floor: within noise. Read over the models both editions asked.

0%from 4% in September 2026

Inside the floor by 7 pointsRank 6 → 16 of 75

All categories · Mid-market

Category	September 2026	Now	Change	Reading	Rank
LLM gateways	9%	0%	▼−9Since September 2026: 9% → 0%, −9 points. Inside the 11-point floor: within noise. Read over the models both editions asked.	Within noise	Rank 4 → 16 of 69
AI governance	0%	0%	newNew since September 2026: not ranked then, 0% now.	New this edition	Rank 31 of 135, unchanged
AI security	0%	0%	newNew since September 2026: not ranked then, 0% now.	New this edition	Rank 172 of 233, unchanged

Shares here are read over the models both editions asked, so they can differ by a point or two from the standing above, which counts every model in this edition.

The floor is 11 points of share, measured: how far the models move a leader on their own when the same questions are asked twice with nothing changed. A larger change is movement; a smaller one is noise, and both are shown. Movement is read over the twelve models both editions asked; GPT-6 Luna, Muse Glimmer 30B joined this edition and are in the standing but not yet in the comparison. How the floor is measured · The editions

By model

How each model treated Langfuse across every prompt where it was named for a mid-market B2B company. Fourteen models, six prompts per category.

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Model	Alternative	Mention	Labels
Claude Haiku 4.5	1	0	1
GPT-5.4 mini	0	0	0
Gemini 3.5 Flash	1	1	2
Perplexity Sonar	0	0	0
Grok 4.20	1	0	1
Mistral Small	1	0	1
DeepSeek V4 Flash	2	0	2
Llama 4 Maverick	0	1	1
Qwen 3.7 Flash	1	0	1
Kimi K2	2	0	2
GLM 4.7 FlashX	1	0	1
MiniMax M2.5	0	0	0
GPT-6 Luna	1	0	1
Muse Glimmer 30B	1	0	1

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

Paraphrase23 labelsNone

Comparative2 labels1not counted in share

Budget-constrained8 labels1

Scale-constrained1 labelNone

Negative1 labelNone

First choiceAlternativeMentionNegative36 labels in all, every segment counted; 1 of the 2 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.

“Langfuse's combination of open source flexibility, active community, and production-ready features makes it a safe starting point” Claude Haiku 4.5 · LLM gateways · paraphrase prompt · alternative

“you pair the industry-standard open-source router with the top open-source observability engine” Gemini 3.5 Flash · LLM gateways · paraphrase prompt · alternative

“Langfuse is a strong contender. It's especially useful if you need deep customization” Mistral Small · LLM gateways · paraphrase prompt · alternative

“Langfuse + LiteLLM if self-hosting and control over where traces live matter more” GPT-6 Luna · LLM gateways · paraphrase 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 Langfuse, over the 36 answers that named it. Took the first choice instead counts the answers where the other product was the first choice and Langfuse was named but was not.

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ProductSame answerTook the first choice insteadHead to head

Portkey24 of 3614Not among the top eight

LiteLLM19 of 365Not among the top eight

Helicone15 of 362Not among the top eight

LangSmith11 of 362Not among the top eight

Arize Phoenix10 of 362Not among the top eight

Credo AI10 of 360Not among the top eight

Braintrust Gateway6 of 360Not among the top eight

Holistic AI6 of 360Not among the top eight

IBM watsonx.governance6 of 360Not among the top eight

Arize AX5 of 361Not among the top eight

A head-to-head page exists where both products are among a category's top eight. 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 Langfuse. A fact about retrieval, not a lever on the model.

Citations exist only for the models that return a source list, five of the fourteen in this edition, so these counts come from 36 of the 36 answers that named Langfuse and are not a share of its labels.

Domains cited

portkey.ai14

firecrawl.dev13

getmaxim.ai11

helicone.ai11

respan.ai11

braintrust.dev10

github.com10

aicompliancevendors.com8

aiopsschool.com8

confident-ai.com8

104 of the 104 domain citations in answers naming Langfuse came from somebody else's page.

Pages cited

firecrawl.dev/blog/best-llm-observability-tools13

helicone.ai/blog/the-complete-guide-to-LLM-observability-platforms9

aiopsschool.com/blog/top-10-ai-governance-platforms-features-pros-cons-comparison8

portkey.ai/buyers-guide/leading-llm-gateway-platforms8

aicompliancevendors.com/guides/ai-governance-tools-for-startups7

infomineo.com/artificial-intelligence/best-ai-governance-tools-in-2026-top-platforms-compa7

langchain.com/resources/llm-observability-tools7

portkey.ai/buyers-guide/ai-agent-observability-platform7

Pages are listed as the models cited them.

Search and answers

langfuse.com is not in Google's top ten for any of the category's searches. In the answers, Langfuse takes 0% of first choices and LiteLLM takes 31%.

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In search

Google, US estimates

Position for “llm gateway”

–

not in the top ten

Position for “llm gateways”

–

not in the top ten

Searches for its name, Google: 18,100 a month (“langfuse”)
AI search demand for its name, est.: 216 a month
Organic visits to its site: about 8,530 a month
Searches its site ranks for: 1,629 · 155 in the top three
Sites linking to it: 4,836
Paid Google search: No ads found in the estimate; that does not mean it runs none

Ads on GoogleDetailLess

4 ads · 4 text · 4 shown in the last 30 days

First shown March 2026, as ClickHouse, Inc., verified. Ads started 2025-10 to 2026-09: 4 in the year.

On Google's pages: 1 2 3 4

In answers

This edition

Share of first choices

rank 16 of 69 in LLM gateways

Segment leader

31%

LiteLLM

First choices: 1 across its categories
Named in: 36 answers
Its own site cited: in 36 of the answers that named it

Search figures are US estimates from DataForSEO, read September 28, 2026; AI search demand is its modeled, directional estimate, not a count of queries to any assistant. The answers are this edition's. Two measurements side by side: neither is read as the cause of the other.

What it publishes

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Addresses on langfuse.com

855

subdomains included

Content

206

counted in the table below

Documentation

339

Product · Integration

0 · 135

Kind	Pages	Last 90 days	Latest	Categories named
Blog	117	0	2026-05-31	LLM gateways
Report or ebook	31	undated
Glossary or explainer	31	undated
Conference or event	19	undated
Comparison	7	undated
Webinar or virtual event	1	undated

Most recent

2026-05-312026 06 09 ai is eating ai engineering blog
2026-03-122026 03 24 optimizing ai skill with autoresearch blog

How it is countedHide how it is counted

Every page langfuse.com exposes, subdomains included. Kind is read from the address and title. The last 90 days, the latest date and the twelve months count pages by when they were published, from the site's feeds, a date in the address, or the page's own publication date, read from up to a hundred of its most recently changed pages; a page that says only when it last changed is counted in its kind but not in when, so the recent counts are a floor, and a kind none of whose pages gives a publication date reads undated. An event counts as online when its address or title says so (webinar, on demand, virtual or online summit); a conference, summit, trade show, expo or roadshow that does not say so is counted as a conference or event, which on a vendor's site is mostly in person. Read September 29, 2026.

Follow Langfuse

An email the morning each edition publishes: where this product moved, where it held, and by how much against the noise floor. One address, confirmed by a click; a stop link in every email.

Already following? Everything you follow, with a stop for each.

The company

Langfuse is its own company.

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In its own words

Stated by the vendor, not checked

Positioning: Open Source Agent Evals & Observability
langfuse.com
For: Developers who value open-source and control over their data build production grade agents and LLM applications with Langfuse.
langfuse.com
Price stated: Get Started — Free tier: 50k observations/month. No credit card required. langfuse.com
Starting price: 0 langfuse.com/pricing
Free plan or trial: Free tier: 50k observations/month. No credit card required. langfuse.com
Integrations claimed: 100 langfuse.com
Certifications: SOC 2 Type IIISO 27001SOC2 Type II & ISO27001 reportsHIPAA-ready regionHIPAA
Hosting: EUUSHIPAA-ready regionUS, EU, or JPUS, EU, JP, or HIPAAUS & HIPAA region: us-west-2 (Oregon)EU region: eu-west-1 (Ireland)JP region: ap-northeast-1 (Japan)
Customers named: RampCanvaKhan AcademyHugging FaceSumUpMerckTrade RepublicIntuit

What Langfuse's own pages state, read September 28, 2026: langfuse.com, langfuse.com/pricing, langfuse.com/security, langfuse.com/handbook/chapters/customers, langfuse.com/partners. A claimed page can correct any of 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 Langfuse'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 Langfuse, applied by version and listed in the change log; and a one-line description supplied by the vendor and marked as such.

What a new claim receivesHide what a new claim receives

A new claim receives the current edition's vendor brief for Langfuse by email, built from the raw record of the edition. It shows:

where Langfuse is named, by buyer and by framing, and which cells hold its first choices;
the claims the models make when they name it, ranked, with the strongest and the weakest quoted;
its vocabulary against the segment leader's, and the pages the models cited;
who was chosen in the answers that did not name Langfuse, and every reason the record gives;
a battlecard for each top rival: the head-to-head split, why they win, and the reservation quoted against them;
one page of published figures cleared to show a buyer.