Arize vs Langfuse:Which is more popular?
In September 2026, Langfuse had more branded searches than Arize among AI evaluation platforms worldwide. Langfuse had about 110,000 branded searches, while Arize had 12,100. Langfuse made up 39.8% of all AI evaluation platform searches we track, and Arize accounted for 4.4%. When we asked ChatGPT and Google AI Overviews about AI evaluation platforms, Arize appeared in four of the five answers and Langfuse in three. Langfuse was mentioned before Arize in three out of four answers.
Who do people search for more?
Langfuse, about 9 searches for every 1 for Arize
Who does AI mention more?
Arize, mentioned in 4 of 5 answers, Langfuse in 3
Who does AI recommend more?
Langfuse, named ahead of Arize in 3 of 4 answers
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Top AI evaluation platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Arize was mentioned in four out of five: in all three ChatGPT answers and in one of the two Google AI Overviews. Langfuse was mentioned in three out of five: in all three ChatGPT answers, but not in either of the two Google AI Overviews. Langfuse was listed before Arize in three out of four answers.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Braintrust1st
LangSmith2nd- Langfuse3rd
- Arize4th
Weights & Biases5th
Promptfoo6th
Patronus AI–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Arize4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Braintrust4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Langfuse3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- LangSmith3 of 5Named in 3 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Weights & Biases2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Promptfoo2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Patronus AI0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about AI evaluation platforms
5 answers
Asked ChatGPT
“Which AI evaluation platform should I use?”
Asked ChatGPT
“What are the best AI evaluation platforms?”
Asked ChatGPT
“What's the best AI evaluation platform for llm teams?”
Searched Google, AI Overview
“ai evaluation platforms”
Searched Google, AI Overview
“ai model evaluation”
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 20, 2026.
Is Arize or Langfuse more popular in search?
This chart shows how often people search Google for Arize and Langfuse by name. Each line represents a brand's share of searches for all seven AI evaluation platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for Langfuse, Arize. The figures are in the table below the chart.
View monthly share of searches table
| Month | Langfuse | LangSmith | Weights & Biases | Promptfoo | Arize | Patronus AI | Braintrust |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 29.5% | 29.5% | 31.8% | 4% | 4% | 0.65% | 0.64% |
| Nov 2025 | 29.5% | 29.5% | 31.8% | 4.8% | 3.2% | 0.53% | 0.64% |
| Dec 2025 | 29.6% | 29.6% | 30.5% | 4.8% | 4% | 0.65% | 0.76% |
| Jan 2026 | 33.5% | 27.4% | 28.2% | 5.5% | 3.7% | 0.6% | 1.1% |
| Feb 2026 | 35% | 28.6% | 25.2% | 5.7% | 3.8% | 0.74% | 0.93% |
| Mar 2026 | 29.9% | 24.6% | 21.6% | 20.1% | 2.7% | 0.66% | 0.52% |
| Apr 2026 | 32.8% | 27% | 27.8% | 8.1% | 3% | 0.72% | 0.72% |
| May 2026 | 34.8% | 28.7% | 24.1% | 7% | 3.8% | 0.77% | 0.76% |
| Jun 2026 | 36.2% | 29.8% | 21.4% | 7.3% | 3.3% | 1.2% | 0.79% |
| Jul 2026 | 37.7% | 31% | 18.3% | 7.6% | 3.4% | 1.2% | 0.82% |
| Aug 2026 | 39.5% | 26.6% | 18.3% | 8% | 5.3% | 1.3% | 1% |
| Sep 2026 | 39.8% | 26.8% | 18.6% | 8% | 4.4% | 1.3% | 1.1% |
How has the Arize and Langfuse comparison changed over the last 12 months?
3 findings
- Langfuse was ahead of Arize in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Arize’s share of searches among AI evaluation platforms worldwide moved from 4% to 4.4%, and its estimated monthly branded searches moved from 9.9K to 12.1K.
- Across the 12 months ending September 2026, Langfuse’s share of searches among AI evaluation platforms worldwide moved from 29.5% to 39.8%, and its estimated monthly branded searches moved from 74K to 110K.
How did search popularity change for AI evaluation platforms worldwide in September 2026?
2 changes
In September 2026, Arize lost share of searches among AI evaluation platforms worldwide, from 5.3% to 4.4%.
Langfuse’s share of searches among AI evaluation platforms worldwide has gained ground for 3 months in a row, from 36.2% to 39.8% in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Arize’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.
Other head-to-heads among AI evaluation platforms
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