Promptfoo vs SkillSpector

Side-by-side comparison of two AI agent tools

Short answer

  • SkillSpector is growing faster: +3,795 GitHub stars in the last 30 days vs +1,112 for Promptfoo.
  • Pick Promptfoo for: open-source CLI and library for evaluating and red-teaming prompts, agents, RAG systems, and LLM apps. Pick SkillSpector for: scans AI agent skills for prompt injection, data exfiltration, supply-chain risks, and vulnerabilities.

From GitHub data refreshed daily.

Promptfooopen-source

Open-source CLI and library for evaluating and red-teaming prompts, agents, RAG systems, and LLM apps

S
SkillSpectoropen-source

Scans AI agent skills for prompt injection, data exfiltration, supply-chain risks, and vulnerabilities

Metrics

PromptfooSkillSpector
Stars25.6k19.0k
Star velocity /mo1.1k3.8k
Commits (90d)913352
Releases (6m)1010
Overall score0.87428607232017020.8661125187271228

Pros

  • +Comprehensive testing suite covering both performance evaluation and security red teaming in a single tool
  • +Multi-provider support with easy comparison between OpenAI, Anthropic, Claude, Gemini, Llama and dozens of other models
  • +Strong CI/CD integration with automated pull request scanning and code review capabilities for production deployments

    Cons

    • -Requires API keys and credits for multiple LLM providers, which can become expensive for extensive testing
    • -Command-line focused interface may have a learning curve for teams preferring GUI-based tools
    • -Limited to evaluation and testing - does not provide actual LLM application development capabilities

      Use Cases

      • •Automated testing and evaluation of prompt performance across different models before production deployment
      • •Security vulnerability scanning and red teaming of LLM applications to identify potential risks and compliance issues
      • •Systematic comparison of model performance and cost-effectiveness to optimize AI application architecture
        View Promptfoo DetailsView SkillSpector Details

        FAQ

        Which is more popular, Promptfoo or SkillSpector?
        Promptfoo has more GitHub stars (25,640 vs 19,034).
        Which is more actively developed, Promptfoo or SkillSpector?
        Promptfoo had more commits in the last 90 days (913 vs 352).
        Should I use Promptfoo or SkillSpector?
        Compare their capabilities, limitations and "best for" notes above. Both are open source, so trying each on a small task is the fastest way to decide.