Langfuse vs Promptfoo

Side-by-side comparison of features, pricing, and ratings

Analysis reviewed Live tool data as of 2026-09-29
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At a glance

DimensionLangfusePromptfoo
Pricingfreemium · from Hobby $0/mofreemium · from Community $0/mo
Best forAI engineering teams running multi-turn chat or coding agents in production, Enterprises needing self-hosting or a US/EU/JP data region for SOC 2, ISO 27001, or HIPAAEnterprise security and AppSec teams running automated red teaming on LLM apps, Developers who want AI security findings inside the CI/CD pipeline and pull requests
Standout featuresHierarchical tracing of LLM calls, tool invocations, and retrieval steps · Session tracking for multi-turn conversations and agentic workflows · Per-user token and cost tracking for multi-tenant billingAutomated red teaming for AI agents and RAG pipelines · Context-aware attack generation: direct and indirect prompt injections · Jailbreaks tailored to your specific guardrails
Viability score89/10087/100
APIYesYes

Langfuse is the stronger pick for ai engineering teams running multi-turn chat or coding agents in production; Promptfoo fits better for enterprise security and appsec teams running automated red teaming on llm apps.

Built from live tool data, last verified 2026-09-29.

Langfuse
Langfuse

Open-source LLM observability, prompt management, and evaluation for teams running AI agents in production.

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Promptfoo
Promptfoo

Automated red teaming and LLM security testing for AI agents, RAG pipelines, and production apps

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Pricing
Freemium
Freemium
Plans
$0/mo
$29/mo
$199/mo
$300/mo
$2499/mo
$0/mo
Custom
Custom
Popularity
6.5k views
3.4k views
Skill Level
Intermediate
Intermediate
API Available
Platforms
WebAPI
CLIAPI
Categories
📡 LLM Observability & Evals
🛡️ AI Governance & Guardrails📡 LLM Observability & Evals
Features
Hierarchical tracing of LLM calls, tool invocations, and retrieval steps
Session tracking for multi-turn conversations and agentic workflows
Per-user token and cost tracking for multi-tenant billing
Agent graphs visualizing complex agentic workflows
Responsive Trace Timeline with map-style zoom and colour-coded observation types
LLM-as-a-judge evaluators, including multi-modal and multi-message prompt support
Code/heuristic evaluators and custom evaluation scores
Backfill evaluator scores onto historical observations when attaching an evaluator to a rule
Human annotation queues for building golden datasets
Evaluator versioning, restore-as-draft, and template starters for chatbots and coding agents
Prompt versioning, labels, one-click deployments, and rollbacks
Prompt composability with server- and client-side prompt caching
Playground for testing prompts on real production inputs and comparing models
Datasets and Experiments via SDK or UI with side-by-side result comparison
Langfuse Assistant runs code over thousands of observations in a background sandbox
Automated red teaming for AI agents and RAG pipelines
Context-aware attack generation: direct and indirect prompt injections
Jailbreaks tailored to your specific guardrails
Data and PII leak detection
Business rule violation testing
Insecure tool-use testing in agents
Real-time guardrails against jailbreaks and adversarial attacks
CI/CD integration (GitHub, GitLab, Jenkins, and more)
Code scanning for LLM vulnerabilities in VS Code and JetBrains
Model Security: security testing and monitoring for AI models
MCP Proxy for securing Model Context Protocol communications
LLM evaluations for prompts, models, and RAG pipelines
Remediation guidance posted directly in pull requests
Real-time threat intel from a 300k+ user community
ModelAudit: open-source scanner for 42+ ML model file formats (CVEs, unsafe loading)
Integrations
LangChain
Vercel AI SDK
LiteLLM
Pydantic AI
Google ADK
CrewAI
LiveKit
OpenAI
Anthropic
Amazon Bedrock
Azure OpenAI
Mistral AI
Google Gemini
xAI
PostHog
GitHub
GitLab
Jenkins
MCP
Slack
Jira
VS Code
JetBrains

Frequently Asked Questions

Which is better, Langfuse or Promptfoo?

The best choice between Langfuse and Promptfoo depends on your specific use case — we compare them independently on features, current pricing, integrations, and real-world signals (with an on-demand sentiment scan available for each). See the side-by-side breakdown above to match them to your needs.

What are the main differences between Langfuse and Promptfoo?

The key differences include pricing model, feature set, platform support, and skill level requirements. Review the full comparison on RightAIChoice for a detailed breakdown.

Is there a free version of Langfuse or Promptfoo?

Check the pricing section in the comparison for the latest pricing details on both tools, including free tiers, trial options, and paid plans.

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Explore each tool further

Langfuse
View Langfuse reviewLangfuse alternatives
Promptfoo
View Promptfoo reviewPromptfoo alternatives

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Last reviewed: May 12, 2026