Langfuse vs Promptfoo:Which is searched more?
In September 2026, Langfuse had more branded searches than Promptfoo among AI evaluation platforms worldwide. Langfuse had about 110,000 branded searches, while Promptfoo had 22,200. Langfuse made up 39.8% of all AI evaluation platform searches we track, and Promptfoo accounted for 8%. These are worldwide searches for English-language branded terms.
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Is Langfuse or Promptfoo more popular in search?
Compare the platforms used to evaluate AI output. Branded searches tell you how often people look for a brand by name or related terms. Comparing these searches across competitors helps you see how popular each brand is over time.
Share of searches by month for Langfuse, Promptfoo. 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 Langfuse and Promptfoo comparison changed over the last 12 months?
3 findings
- Langfuse was ahead of Promptfoo in every measured month of the 12 months ending September 2026.
- 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.
- Across the 12 months ending September 2026, Promptfoo’s share of searches among AI evaluation platforms worldwide moved from 4% to 8%, and its estimated monthly branded searches moved from 9.9K to 22.2K.
How did search popularity change for AI evaluation platforms worldwide in September 2026?
2 changes
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.
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.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using Langfuse’s and Promptfoo’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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