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LangChain
LangChain vs Promptfoo
A side-by-side comparison of pricing, ratings, features, pros and cons.
| Overview | |||
| Description | Agent engineering platform and open-source frameworks for building, evaluating, and deploying AI agents in production. | Test and evaluate LLM prompts with automated red-teaming. `#opensource` `#free` | |
| Category | |||
| Developer | Langchain | Promptfoo, Inc. | |
| Verified Status | No | ||
| Last Updated | Aug 2026 | Aug 2026 | |
| Pricing | |||
| Pricing Model | Free | Freemium | |
| Free Plan | Yes | No | |
| Free Trial | — | No | |
| Open Source | No | No | |
| Capabilities | |||
| API Access | — | No | |
| Features | • Open-source agent frameworks: LangChain, LangGraph, deepagents • LangSmith for tracing, evaluation, and observability • SDKs for Python, TypeScript, Go, and Java • Fleet no-code agent builder • OpenTelemetry-compatible tracing • Deployment infrastructure for production agents | • Automated red teaming for agents and RAG systems • Real-time guardrails against adversarial attacks • Code scanning for LLM vulnerabilities in IDEs and CI/CD • MCP Proxy for secure protocol communications • Free open-source version; custom-priced enterprise tier | |
| Tags | frameworkllmcomposable | promptfootestevaluatepromptsautomatedteaming | |
| Trust and Engagement | |||
| Review Count | 0 | 0 | |
| Saves | 0 | 0 | |
| Views | 78 | 9 | |
| Quality Score | 53/100 | 33/100 | |
| Website Status | Online | Online | |
| Availability | |||
| Website | langchain.com | promptfoo.dev | |
| Social Links | 2 linked | 2 linked | |
| Screenshots | Yes | No | |
| Reviews | |||
| Pros | • Free to use • Recommended by our editors | • Free to use | |
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