LangSmith vs Promptfoo:Which is more popular?
In September 2026, LangSmith had more branded searches than Promptfoo among prompt management platforms worldwide. LangSmith had about 74,000 branded searches, while Promptfoo had 22,200. LangSmith made up 34.2% of all prompt management platform searches we track, and Promptfoo accounted for 10.3%. When we asked ChatGPT and Google AI Overviews about prompt management platforms, LangSmith appeared in all five answers and Promptfoo in three. LangSmith was mentioned before Promptfoo in every answer.
Who do people search for more?
LangSmith, about 3 searches for every 1 for Promptfoo
Who does AI mention more?
LangSmith, mentioned in every answer we collected
Who does AI recommend more?
LangSmith, named ahead of Promptfoo in every answer
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Top prompt management platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, LangSmith appeared in all five answers. Promptfoo was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. LangSmith was listed before Promptfoo in every answer.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
Langfuse1st
PromptLayer2nd- LangSmith3rd
Braintrust4th
Promptfoo5th
Helicone–
Humanloop–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- Langfuse5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- LangSmith5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- PromptLayer5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Braintrust4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Promptfoo3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Helicone0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Humanloop0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about prompt management platforms
5 answers
Asked ChatGPT
“Which prompt management platform should I use?”
Asked ChatGPT
“What are the best prompt management platforms?”
Asked ChatGPT
“What's the best prompt management platform for a small ai team?”
Searched Google, AI Overview
“prompt management platform”
Searched Google, AI Overview
“prompt versioning tool”
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is LangSmith or Promptfoo more popular in search?
This chart shows how often people search Google for LangSmith and Promptfoo by name. Each line represents a brand's share of searches for all seven prompt management platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for LangSmith, Promptfoo. The figures are in the table below the chart.
View monthly share of searches table
| Month | Langfuse | LangSmith | Promptfoo | Helicone | Braintrust | PromptLayer | Humanloop |
|---|---|---|---|---|---|---|---|
| Oct 2025 | 42.8% | 42.8% | 5.7% | 3.1% | 0.93% | 3.1% | 1.4% |
| Nov 2025 | 42.4% | 42.4% | 6.9% | 3.1% | 0.92% | 3.1% | 1.1% |
| Dec 2025 | 42.3% | 42.3% | 6.9% | 3.8% | 1.1% | 2.5% | 1.1% |
| Jan 2026 | 45.8% | 37.4% | 7.5% | 4.1% | 1.5% | 2.7% | 0.96% |
| Feb 2026 | 46.2% | 37.8% | 7.6% | 4.1% | 1.2% | 2.2% | 0.82% |
| Mar 2026 | 37.6% | 30.9% | 25.3% | 3.4% | 0.65% | 1.5% | 0.65% |
| Apr 2026 | 44.8% | 36.9% | 11% | 4% | 0.98% | 1.5% | 0.77% |
| May 2026 | 46.4% | 38.2% | 9.4% | 3.4% | 1% | 1% | 0.67% |
| Jun 2026 | 46.8% | 38.5% | 9.4% | 2.8% | 1% | 0.81% | 0.68% |
| Jul 2026 | 47.1% | 38.7% | 9.5% | 2.3% | 1% | 0.81% | 0.56% |
| Aug 2026 | 50.7% | 34.1% | 10.2% | 2.5% | 1.3% | 0.74% | 0.46% |
| Sep 2026 | 50.8% | 34.2% | 10.3% | 2% | 1.3% | 0.88% | 0.46% |
How has the LangSmith and Promptfoo comparison changed over the last 12 months?
3 findings
- LangSmith was ahead of Promptfoo in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, LangSmith’s share of searches among prompt management platforms worldwide moved from 42.8% to 34.2%, and its estimated monthly branded searches held steady at 74K.
- Across the 12 months ending September 2026, Promptfoo’s share of searches among prompt management platforms worldwide moved from 5.7% to 10.3%, and its estimated monthly branded searches moved from 9.9K to 22.2K.
How did search popularity change for prompt management platforms worldwide in September 2026?
1 change
Promptfoo’s share of searches among prompt management platforms worldwide has gained ground for 3 months in a row, from 9.4% to 10.3% in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using LangSmith’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.
Other head-to-heads among prompt management platforms
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