langfuse

langfuse/langfuse

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

7 good first / help-wanted issues · TypeScript · last activity Jul 8, 2026

30.6K stars 3.2K forks 30.6K watchers TypeScript Other
analytics autogen evaluation langchain large-language-models llama-index llm llm-evaluation llm-observability llmops monitoring observability open-source openai playground prompt-engineering prompt-management self-hosted ycombinator
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7 Open Issues Need Help Last updated: Jul 8, 2026

Open Issues Need Help

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chore(web): remove expired searchBar feature-preview plumbing (TODO past due 2026-06-19) about 1 month ago
good first issue tech-debt feat-table-filters search
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator
bug: PostHog integration export overwhelms target instance with unbounded burst (18k events/sec observed) 3 months ago
good first issue performance improvement feat-exports integration-posthog
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator
feat(quick-win): Visualize time-to-first-token in trace timeline view 4 months ago
good first issue ui
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator
feat: encode special characters in database connection string to prevent prisma errors 7 months ago
good first issue self-hosting
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator
bug: setting REDIX_KEY_PREFIX to avoid clashes in shared Redis raises 8 months ago
bug good first issue self-hosting
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator
bug: filtering prompts by "none of <labels>" does not work about 1 year ago
bug good first issue ui feat-prompt-management stale
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator
Allow passing custom serializer to Langfuse client about 1 year ago
good first issue sdk-python stale
langfuse/langfuse
30.6K

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

TypeScript
#analytics#autogen#evaluation#langchain#large-language-models#llama-index#llm#llm-evaluation#llm-observability#llmops#monitoring#observability#open-source#openai#playground#prompt-engineering#prompt-management#self-hosted#ycombinator