Fiddler vs Langfuse:Which is more popular?
In September 2026, Langfuse had more branded searches than Fiddler among model monitoring platforms worldwide. Langfuse had about 110,000 branded searches, while Fiddler had 2,400. Langfuse made up 53.5% of all model monitoring platform searches we track, and Fiddler accounted for 1.2%. When we asked ChatGPT and Google AI Overviews about model monitoring platforms, Fiddler appeared in four of the five answers and Langfuse in two. Fiddler and Langfuse were each mentioned first in two of the four answers.
Who do people search for more?
Langfuse, about 46 searches for every 1 for Fiddler
Who does AI mention more?
Fiddler, mentioned in 4 of 5 answers, Langfuse in 2
Who does AI recommend more?
Each is named first in 2 of 4 answers.
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Top model monitoring platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Fiddler was mentioned in four out of five: in two of the three ChatGPT answers and in both Google AI Overviews. Langfuse was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Fiddler and Langfuse were each listed first in two of the four answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Arize1st- Langfuse2nd
LangSmith3rd
Evidently4th- Fiddler5th
Braintrust6th
Datadog LLM Observability7th- WhyLabs8th
NannyML–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Arize5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Evidently5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Fiddler4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Langfuse2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- LangSmith2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Braintrust2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Datadog LLM Observability2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- WhyLabs2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- NannyML0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about model monitoring platforms
5 answers
Asked ChatGPT
“Which model monitoring platform should I use?”
Asked ChatGPT
“What are the best model monitoring platforms?”
Asked ChatGPT
“What's the best model monitoring platform for machine learning models?”
Searched Google, AI Overview
“model monitoring platforms”
Searched Google, AI Overview
“ml model monitoring”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is Fiddler or Langfuse more popular in search?
This chart shows how often people search Google for Fiddler and Langfuse by name. Each line represents a brand's share of searches for all nine model monitoring platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for Langfuse, Fiddler. The figures are in the table below the chart.
View monthly share of searches table
| Month | Langfuse | LangSmith | Arize | Braintrust | Evidently | Fiddler | Datadog LLM Observability | WhyLabs | NannyML |
|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 43.5% | 43.5% | 5.8% | 0.94% | 2.1% | 1.7% | 1.4% | 0.76% | 0.35% |
| Nov 2025 | 44.2% | 44.2% | 4.8% | 0.95% | 2.1% | 1.7% | 1.1% | 0.6% | 0.29% |
| Dec 2025 | 43.8% | 43.8% | 5.9% | 1.1% | 2.1% | 1.4% | 1.1% | 0.59% | 0.23% |
| Jan 2026 | 48.4% | 39.6% | 5.3% | 1.6% | 1.6% | 1.9% | 1% | 0.53% | 0.21% |
| Feb 2026 | 48.2% | 39.4% | 5.3% | 1.3% | 1.9% | 1.9% | 1.3% | 0.53% | 0.26% |
| Mar 2026 | 48.8% | 40.1% | 4.4% | 0.84% | 2% | 2% | 1.3% | 0.44% | 0.21% |
| Apr 2026 | 49.1% | 40.4% | 4.4% | 1.1% | 2% | 1.6% | 0.85% | 0.39% | 0.21% |
| May 2026 | 49% | 40.3% | 5.4% | 1.1% | 1.3% | 1.3% | 1.1% | 0.45% | 0.17% |
| Jun 2026 | 49.6% | 40.8% | 4.5% | 1.1% | 1.3% | 1.1% | 1.1% | 0.4% | 0.18% |
| Jul 2026 | 49.7% | 40.9% | 4.5% | 1.1% | 1.3% | 1.3% | 0.59% | 0.45% | 0.18% |
| Aug 2026 | 52.7% | 35.5% | 7.1% | 1.4% | 1.2% | 1.2% | 0.48% | 0.35% | 0.15% |
| Sep 2026 | 53.5% | 36% | 5.9% | 1.4% | 1.2% | 1.2% | 0.43% | 0.23% | 0.16% |
How has the Fiddler and Langfuse comparison changed over the last 12 months?
3 findings
- Langfuse was ahead of Fiddler in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Fiddler’s share of searches among model monitoring platforms worldwide moved from 1.7% to 1.2%, and its estimated monthly branded searches moved from 2.9K to 2.4K.
- Across the 12 months ending September 2026, Langfuse’s share of searches among model monitoring platforms worldwide moved from 43.5% to 53.5%, and its estimated monthly branded searches moved from 74K to 110K.
How did search popularity change for model monitoring platforms worldwide in September 2026?
2 changes
In September 2026, Langfuse gained share of searches among model monitoring platforms worldwide, from 52.7% to 53.5%.
Estimated monthly branded searches for Fiddler worldwide fell 17.2% over 12 measured months, from 2.9K to 2.4K in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Fiddler’s and Langfuse’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
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