Langfuse vs PromptHub

Langfuse is an open-source AI engineering platform for teams debugging, analyzing, and iterating on AI agent applications. Its tracing records prompts, model responses, token use, latency, tool calls, retrieval steps, and metadata. Prompt Management stores, versions, deploys, and tests prompts, then links them to traces. Evaluation features include LLM-as-a-judge, code evaluators, user feedback, manual labeling, datasets, and experiments. Integrations include Python and JS/TS SDKs, OpenTelemetry, an API, CLI, MCP Server, and popular AI frameworks. Teams can self-host the MIT-licensed core on customer infrastructure using Docker, with options including Docker Compose, Kubernetes, AWS, and Azure. Langfuse reports annual SOC 2 Type 2 and ISO 27001 audits, external penetration tests, GDPR compliance, a DPA, and a HIPAA-ready region. Its Cloud traffic uses TLS 1.2+ and stored data uses AES-256 encryption. The free Hobby plan is free and includes 50k units per month, 30 days of data access, two users, and community support via GitHub. Core costs $29 a month, billed monthly.

PromptHub is a community-driven platform for finding, managing, testing, and deploying prompts. Public prompts can be shared with the community; private prompts with teammates are available on paid plans. Git-based versioning tracks prompt changes, and an API supports prompt management and deployment. Evaluations compare outputs across test cases, while pipelines can run checks on commits or merges for secret leaks, profanity, and regressions. Listed model providers include OpenAI, Anthropic, Azure, Google, Meta, Bedrock, and Mistral. Prompts can also be deployed through shareable forms or Zapier. The Free plan includes unlimited public prompts and team members, but not private prompts; it also has 2,000 requests per month and limited API access. Pro costs $12 a month for one user, and Team costs $20 a month per user. Enterprise pricing is custom and not listed. Customers supply their own LLM API keys and pay providers' token costs separately. The pricing page says prompts, variables, and outputs are encrypted at rest and in transit using AES-246, TLSv1.2+, and regularly rotating keys. The company is Tethered Software Inc.