Heat Score
37
7-Day Change
+8
A.R.C. Grade
—
Pricing
free
Promptfoo is an open-source CLI and library for testing and evaluating LLM prompts. It automates evaluations and safety testing before production deployment.
Open-source CLI and library for testing and evaluating LLM prompts. Run automated evals, red-team your models for safety, and catch regressions before they hit production.
What the signals say about Promptfoo
Promptfoo holds a HookFlow heat score of 37/100 in Developer Tools, currently showing a clear upward trajectory in community and search signals. Over the last 7 days its score moved +8 points (up), -8 over 30 days. On the Lock-In Index it scores 100/100 (high lock-in, with significant switching cost).
Heat Score
0–100 viral momentum index combining social buzz, search trends & growth velocity
37
14-day trend
0
24h
+8
7d
-8
30d
Computed from 2 live sources in the latest pipeline run — more sources, higher confidence.
Heat Score Breakdown
Creator Buzz (30%)3
Search Interest (25%)73
Community Discussion (20%)2
Growth Momentum (25%)70
What is Promptfoo used for?
Promptfoo is used to test and evaluate LLM prompts through automated evals, perform red-team testing for safety, and detect regressions before models reach production.
Is Promptfoo open source?
Yes, Promptfoo is an open-source CLI and library available for free use.
How does Promptfoo help catch model issues?
- Run automated evaluations against your LLM prompts
- Conduct red-team testing to identify safety vulnerabilities
- Detect regressions and issues before production deployment
Does Promptfoo cost anything?
No, Promptfoo is free to use as an open-source tool.
Forecast
Stable
low confidence
Now
37
→
+7 days
20
→
+14 days
34
A.R.C. Score
A.R.C. ratings are calculated for developer infrastructure and API-first tools. This tool hasn't been evaluated yet or falls outside the A.R.C. scope.
🔓Data Lock-In Index
100/ 100
Lower = more portable. 0 = fully open, 100 = maximum lock-in.
✗ Webhooks Out✗ Bulk Export✗ Open Formats
Pricing
free
Best For
Teams & Solo
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GitHub health score, founder track record, full A.R.C. breakdown, category peer comparison, and 14-day score forecast — in one printable report.
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