Brandwave

How popular isPromptfoo?

In September 2026, people searched for Promptfoo by name about 22,200 times worldwide, a 124.2% increase from the previous year. These searches made up 8% of all global AI evaluation platform searches, placing Promptfoo fourth out of seven platforms. When we asked both ChatGPT and Google AI Overviews about AI evaluation platforms, Promptfoo appeared in two of the five answers and was the sixth most recommended of the seven.

Search and AI answers in September 2026

Promptfoo is the fourth most searched of 7 competitors and the sixth 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, Promptfoo was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Promptfoo is the sixth 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 Promptfoo?

Promptfoo 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 Promptfoo and its closest rivals

Every comparison with Promptfoo

15 comparisons

How has branded search demand for Promptfoo changed worldwide over the last 12 months?

4 findings
  • Across the 12 months ending September 2026, estimated monthly branded searches for Promptfoo worldwide rose from 9.9K to 22.2K.
  • Across the 12 months ending September 2026, Promptfoo’s share of searches among AI evaluation platforms worldwide increased from 4% to 8%.
  • Across the 12 months ending September 2026, Promptfoo’s share of searches among AI evaluation platforms worldwide peaked at 20.1% in March 2026 and was lowest at 4% in October 2025.
  • Across the 12 months ending September 2026, Promptfoo rose from 5th to 4th 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 Promptfoo’s branded searches counted?

1 search term

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

  • promptfoo

Do you work for Promptfoo? To request corrections or removal please contact us via our support page and we will be happy to assist.

How the Brand Demand Index is measured

Where does Promptfoo compete?

Promptfoo is ranked in three competitor sets. Each share is worked out among that set's brands, so it differs from set to set.
Competitor setRankShare of searchesRanking
AI evaluation platforms4th of 78%Shown above
Prompt management platforms3rd of 710.3%Show ranking
AI testing tools2nd of 816.2%Show ranking
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