Brandwave

How popular isWeights & Biases?

In September 2026, people searched for Weights & Biases by name about 51,300 times worldwide, a 35.6% decrease from the previous year. These searches made up 18.6% of all global AI evaluation platform searches, placing Weights & Biases third out of seven platforms. When we asked both ChatGPT and Google AI Overviews about AI evaluation platforms, Weights & Biases appeared in two of the five answers and was the fifth most recommended of the seven.

Search and AI answers in September 2026

Weights & Biases is the third most searched of 7 competitors and the fifth most recommended in AI answers.

  1. LangfuseShare of searches 39.8%Mentioned in 3 of 5 AI answersPlace in AI recommendations 3rd
  2. LangSmithShare of searches 26.8%Mentioned in 3 of 5 AI answersPlace in AI recommendations 2nd
  3. Weights & BiasesShare of searches 18.6%Mentioned in 2 of 5 AI answersPlace in AI recommendations 5th
  4. PromptfooShare of searches 8%Mentioned in 2 of 5 AI answersPlace in AI recommendations 6th
  5. ArizeShare of searches 4.4%Mentioned in 4 of 5 AI answersPlace in AI recommendations 4th

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Top AI evaluation platforms in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Weights & Biases was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Weights & Biases is the fifth most recommended of the seven.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. Braintrust1st
  2. LangSmith2nd
  3. Langfuse3rd
  4. Arize4th
  5. Weights & Biases5th
  6. Promptfoo6th
  7. 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

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.

Which AI evaluation platforms compete with Weights & Biases?

Weights & Biases against AI evaluation platforms worldwide, by month

Share of searches by month for Langfuse, LangSmith, Weights & Biases, Promptfoo, Arize. The figures are in the table below the chart.

View monthly share of searches table
MonthLangfuseLangSmithWeights & BiasesPromptfooArizePatronus AIBraintrust
Oct 202529.5%29.5%31.8%4%4%0.65%0.64%
Nov 202529.5%29.5%31.8%4.8%3.2%0.53%0.64%
Dec 202529.6%29.6%30.5%4.8%4%0.65%0.76%
Jan 202633.5%27.4%28.2%5.5%3.7%0.6%1.1%
Feb 202635%28.6%25.2%5.7%3.8%0.74%0.93%
Mar 202629.9%24.6%21.6%20.1%2.7%0.66%0.52%
Apr 202632.8%27%27.8%8.1%3%0.72%0.72%
May 202634.8%28.7%24.1%7%3.8%0.77%0.76%
Jun 202636.2%29.8%21.4%7.3%3.3%1.2%0.79%
Jul 202637.7%31%18.3%7.6%3.4%1.2%0.82%
Aug 202639.5%26.6%18.3%8%5.3%1.3%1%
Sep 202639.8%26.8%18.6%8%4.4%1.3%1.1%

  1. 1.Langfuse

    39.8%

    Held 1st. 110K estimated branded searches, 0% vs prior month. Share +0.4 points.

  2. 2.LangSmith

    26.8%

    Held 2nd. 74K estimated branded searches, 0% vs prior month. Share +0.2 points.

  3. 3.Weights & Biases

    18.6%

    Held 3rd. 51.3K estimated branded searches, +0.31% vs prior month. Share +0.2 points.

  4. 4.Promptfoo

    8%

    Held 4th. 22.2K estimated branded searches, 0% vs prior month. Share +0.1 points.

  5. 5.Arize

    4.4%

    Held 5th. 12.1K estimated branded searches, -18.2% vs prior month. Share -0.9 points.

  6. 6.Patronus AI

    1.3%

    Held 6th. 3.6K estimated branded searches, +0.28% vs prior month. Share 0 points.

  7. 7.Braintrust

    1.1%

    Held 7th. 2.9K estimated branded searches, 0% vs prior month. Share 0 points.

Compare popularity between Weights & Biases and its closest rivals

Every comparison with Weights & Biases

25 comparisons

How has branded search demand for Weights & Biases changed worldwide over the last 12 months?

4 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for Weights & Biases worldwide fell from 79.6K to 51.3K.
  • Across the 12 months ending September 2026, Weights & Biases’ share of searches among AI evaluation platforms worldwide decreased from 31.8% to 18.6%.
  • Across the 12 months ending September 2026, Weights & Biases’ share of searches among AI evaluation platforms worldwide peaked at 31.8% in November 2025 and was lowest at 18.3% in July 2026.
  • Across the 12 months ending September 2026, Weights & Biases fell from 1st to 3rd among AI evaluation platforms worldwide.

How did search popularity change for AI evaluation platforms worldwide in September 2026?

6 changes

  1. In September 2026, Arize lost share of searches among AI evaluation platforms worldwide, from 5.3% to 4.4%.

  2. 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.

  3. Promptfoo’s share of searches among AI evaluation platforms worldwide has gained ground for 3 months in a row, from 7.3% to 8% in September 2026.

  4. Estimated monthly branded searches for Patronus AI worldwide rose 124.1% over 12 measured months, from 1.6K to 3.6K in September 2026.

  5. Estimated monthly branded searches for Braintrust worldwide rose 81.3% over 12 measured months, from 1.6K to 2.9K in September 2026.

  6. Estimated monthly branded searches for Weights & Biases worldwide fell 35.6% over 12 measured months, from 79.6K to 51.3K in September 2026.

How are Weights & Biases’ branded searches counted?

3 search terms

Brandwave collects information about searches that people make online using Weights & Biases’ name. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brand is growing, holding steady, or fading.

  • wandb
  • weights and biases
  • weights biases

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How the Brand Demand Index is measured

Where does Weights & Biases compete?

Weights & Biases is ranked in five competitor sets. Each share is worked out among that set's brands, so it differs from set to set.
Competitor setRankShare of searchesRanking
Machine learning platforms4th of 103.4%Show ranking
Experiment tracking platforms4th of 87.8%Show ranking
MLOps platforms2nd of 1116.6%Show ranking
AI evaluation platforms3rd of 718.6%Shown above
LLM observability platforms3rd of 819.7%Show ranking
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