Langfuse
Acquired by ClickHouse (2026-01-16); product and MIT-licensed repo continue under the Langfuse name. Memory module reads/writes captured as named spans. Trace Log View concatenates every agent step including memory ops. Agent Graphs (GA 2025) infer graph structure from observation nesting; session-level replay tracks how memory state evolves.
Acquired · Verified 2026-10-29 · fresh as of 2026-10-29 · 52 cited facts, 8 with a third-party source · 3 recorded changes · Suggest a correction
At a glance
- Type
- Memory ops as named spans + Agent Graphs vendor fix
- Tier
- T1
- Created
- 2023-03 (Langfuse founded March 2023; LLM observability beta summer 2023; GA Feb 2024) vendor fix
- Latest release
- v4.27.0 (Sep 1; page shows no year, presumably 2026) repo fix
- Pricing
- free: 50K observations/mo; Pro: $59/mo; Team: $199/mo; Enterprise: custom third-party fix
- Funding
- Acquired by ClickHouse (2026-01-16; terms undisclosed) third-party fix
- Freshness
- 2026-10-29 fix
- Layer
- agent-infra repo fix
- SDK languages
- python, rest, typescript vendor fix
- Protocols
- mcp-server, opentelemetry vendor fix
- Compliance
- gdpr, hipaa, iso27001, soc2-type2 vendor fix
- Developer activity
- OpenRank 61.93 (12-mo avg 64.71) · 221 participants — 2026-09 third-party fix
Memory taxonomy
- storage
- relational
- retrieval
- exact-match
- persistence
- long-term
- update
- append-only
- unit
- episode
- governance
- auditable
- conflict
- n/a
When to use
Optimised for: memory operation tracing + drift / poisoning detection
Anti-fit: not for use cases that don't run agent workloads in production
Pros & cons
Pros
OSS-first LLM observability with a polished cloud option — self-hostable for compliance-sensitive shops; large open-source community.
Cons
Memory-specific observability is improving but less domain-specialized than Galileo's purpose-built memory views.
Claims & capabilities
No automated drift / poisoning detection — structural observability only. Free 50k observations; Pro $59/mo; Team $199/mo.
Technical surface
- API surface
- REST, SDK: Python, JS/TS
- Backend storage
- Postgres + ClickHouse
- Deployment
- SaaS cloud (Berlin + SF) or self-hosted Docker/K8s; ClickHouse native integration post-acquisition
- Embedding model
- not applicable — observability product
- Multi-tenancy
- namespace (org/project)
- MCP
- via official adapter — langfuse-mcp
- A2A
- no data — searched langfuse.com, langfuse.com/docs, langfuse.com/integrations; A2A protocol not advertised (extensive framework integrations, MCP server present, OTel-native)
- OpenTelemetry
- first-class — native OTel SDK
Compare Langfuse with…
Alternatives to Langfuse → live options ranked by shared design, licence, hosting and MCP support
Similar systems
Other memory observability & monitoring in the catalog, ranked by inbound references.
- LangSmith T1
Memory reads, vector DB retrievals, state changes are distinct span types in traces. RAG eval separates retrieval quality (context precision) from generation quality (faithfulness). Dataset versioning guards against eval drift.
- AgentOps T2
When Mem0 is connected, gains Memory Operation Timeline, Search Analytics, Memory Growth tracking, Error Tracking per memory call. Standalone, records context at each step but doesn't analyse memory quality.
- Galileo (galileo.ai) (now Splunk Agent Observability) T1
Acquired by Cisco (announced 2026-04-09, closed by 2026-05); now Splunk Agent Observability. Treats memory as first-class in multi-agent tracing. Luna-2 SLMs (3B / 8B) scan every interaction for intent drift and belief drift; 20+ checks at sub-200ms latency. Catches when agent A's view of the world splits from teammate B's. OpenTelemetry-compatible.
- Ratine T2
Only tool found that scans the persistent memory layer on disk rather than runtime tracing. Detects injected instructions, obfuscated payloads (zero-width Unicode, base64, homoglyphs, hex), C2-pattern URLs, credential leakage. ratine diff compares snapshots for belief drift.
Sources (51 cited facts, 8 third-party)
Each fact links to the page it came from; the badge says who published it (how to read sources).
- What it is Memory ops as named spans + Agent Graphs vendor
- What it does & what's distinct Acquired by ClickHouse (2026-01-16); product and MIT-licensed repo continue under the La… third-party
- Claims / benefits No automated drift / poisoning detection — structural observability only. Free 50k obser… vendor
- Modalities text (LLM trace + memory span instrumentation) vendor
- Created 2023-03 (Langfuse founded March 2023; LLM observability beta summer 2023; GA Feb 2024) vendor
- Latest release v4.27.0 (Sep 1; page shows no year, presumably 2026) repo
- License MIT (core; ee/ directories under separate enterprise license) repo
- GitHub langfuse/langfuse — ~36.1k stars, last release 2026-09 repo
- Funding Acquired by ClickHouse (2026-01-16; terms undisclosed) third-party
- Customers / scale 1-10 ppl 20k+ GitHub stars, 26M SDK installs/month, acquired by ClickHouse third-party
- Pricing free: 50K observations/mo; Pro: $59/mo; Team: $199/mo; Enterprise: custom third-party
- Compliance SOC 2 (pre-acquisition); ClickHouse enterprise compliance expected post-acquisition vendor
- Data handling cloud-hosted SaaS or self-hosted (OSS; MIT licensed); ClickHouse backend post-acquisition vendor
- Deployment SaaS cloud (Berlin + SF) or self-hosted Docker/K8s; ClickHouse native integration post-a… vendor
- HQ Germany (Berlin) third-party
- Founders / pedigree Marc Klingen (CEO) + Max Deichmann + Clemens Rawert; Berlin-based; acquired by ClickHous… vendor
- Memory volume / scale 26 million SDK installs per month (pre-acquisition claim) third-party
- Performance no public benchmark scores found — vendor does not publish quantitative perf metrics vendor
- API surface REST, SDK: Python, JS/TS vendor
- Backend storage Postgres + ClickHouse vendor
- Multi-tenancy namespace (org/project) vendor
- Encryption at-rest + in-transit vendor
- SSO / RBAC SSO + RBAC vendor
- Consistency not specified — vendor docs do not address this dimension for memory vendor
- Versioning immutable append-log vendor
- Tombstoning append-only no delete vendor
- Schema evolution schema with migration vendor
- Namespace primitives project / org / session — typical SaaS multi-tenant vendor
- Contradiction handling always append (no resolution) vendor
- Forgetting policy none (permanent) vendor
- MCP support via official adapter — langfuse-mcp vendor
- OTel first-class — native OTel SDK vendor
- Webhooks / events webhooks supported vendor
- Import / export JSON, OTel format vendor
- Validated verticals agent developers + AI platform teams (horizontal) vendor
- Time to running <10min (hosted SaaS) to <1hr (self-host) vendor
- Anti-fit not for use cases that don't run agent workloads in production vendor
- Optimised for memory operation tracing + drift / poisoning detection vendor
- Adjacent infrastructure BYO agent stack; this layer observes it vendor
- Pros OSS-first LLM observability with a polished cloud option — self-hostable for compliance-… vendor
- Cons Memory-specific observability is improving but less domain-specialized than Galileo's pu… vendor
- Project & sources langfuse.com agent observability blog vendor
- adoption-accelerator yc-w23 third-party
- architecture-deployment-locus hybrid vendor
- licensing-bucket open-core repo
- positioning-platform-vs-product platform vendor
- taxonomy-three-layer-rollup agent-infra repo
- developer-activity-opendigger {"activity":745.17,"as_of":"2026-09","openrank_12mo":64.71,"openrank_current":61.93,"par… third-party
- compliance-certifications gdpr,hipaa,iso27001,soc2-type2 vendor
- sdk-languages python,rest,typescript vendor
- protocol-support mcp-server,opentelemetry vendor
What changed
Changes to this record's lifecycle, licence, release, pricing and hosting facts, from the catalog's git history. Subscribe (Atom)
- 2026-10-29
- Funding / ownership “acquired by ClickHouse (2026-01; terms undisclosed)” → “Acquired by ClickHouse (2026-01-16; terms undisclosed)” source
- 2026-10-23
- Pricing “free: 50K observations/mo; Pro: $59/mo; Team: $199/mo; Enterprise: custom; acquired by ClickHouse so pricing evolut…” → “free: 50K observations/mo; Pro: $59/mo; Team: $199/mo; Enterprise: custom” source
- Funding / ownership “acquired · 2026-01” → “acquired by ClickHouse (2026-01; terms undisclosed)” source
- 2026-10-22
- License “not applicable — not OSS” → “MIT (core; ee/ directories under separate enterprise license)” source
- Latest release “not applicable — not OSS” → “v4.27.0 (Sep 1; page shows no year, presumably 2026)” source
Related systems
References (63)
- Alibaba Qwen 3 family integrates with — Langfuse's integrations directory has a Alibaba Qwen 3 family integration page. (verified 2026-10-29)
- Anthropic Claude (foundation models) integrates with — Langfuse's integrations directory has a Anthropic Claude (foundation models) integration page. (verified 2026-10-29)
- Augment Code integrates with — Langfuse's integrations directory has a Augment Code integration page. (verified 2026-10-29)
- AutoGen / AG2 integrates with — Langfuse's integrations directory has a AutoGen / AG2 integration page. (verified 2026-10-29)
- Baseten integrates with — Langfuse's integrations directory has a Baseten integration page. (verified 2026-10-29)
- Bedrock AgentCore (AWS) integrates with — Langfuse's integrations directory has a Bedrock AgentCore (AWS) integration page. (verified 2026-10-29)
- BeeAI Framework integrates with — Langfuse's integrations directory has a BeeAI Framework integration page. (verified 2026-10-29)
- Claude Agent SDK integrates with — Langfuse's integrations directory has a Claude Agent SDK integration page. (verified 2026-10-29)
- Claude Code (Anthropic) integrates with — Langfuse's integrations directory has a Claude Code (Anthropic) integration page. (verified 2026-10-29)
- Cognee integrates with — Langfuse's integrations directory has a Cognee integration page. (verified 2026-10-29)
- Cohere Command R+ / Command A integrates with — Langfuse's integrations directory has a Cohere Command R+ / Command A integration page. (verified 2026-10-29)
- CrewAI integrates with — Langfuse's integrations directory has a CrewAI integration page. (verified 2026-10-29)
- Cursor (IDE) integrates with — Langfuse's integrations directory has a Cursor (IDE) integration page. (verified 2026-10-29)
- DeepSeek R1 / V3 family integrates with — Langfuse's integrations directory has a DeepSeek R1 / V3 family integration page. (verified 2026-10-29)
- Dify integrates with — Langfuse's integrations directory has a Dify integration page. (verified 2026-10-29)
- DSPy integrates with — Langfuse's integrations directory has a DSPy integration page. (verified 2026-10-29)
- ElevenLabs Conversational AI (now ElevenAgents) integrates with — Langfuse's integrations directory has a ElevenLabs Conversational AI integration page. (verified 2026-10-29)
- Fireworks AI integrates with — Langfuse's integrations directory has a Fireworks AI integration page. (verified 2026-10-29)
- Flowise Memory integrates with — Langfuse's integrations directory has a Flowise Memory integration page. (verified 2026-10-29)
- GitHub Copilot (Agent Mode) integrates with — Langfuse's integrations directory has a GitHub Copilot (Agent Mode) integration page. (verified 2026-10-29)
- Google Agent Development Kit (ADK) integrates with — Langfuse's integrations directory has a Google Agent Development Kit (ADK) integration page. (verified 2026-10-29)
- Google Gemini 3 family integrates with — Langfuse's integrations directory has a Google Gemini 3 family integration page. (verified 2026-10-29)
- Goose (Block) integrates with — Langfuse's integrations directory has a Goose (Block) integration page. (verified 2026-10-29)
- Haystack (framework) integrates with — Langfuse's integrations directory has a Haystack (framework) integration page. (verified 2026-10-29)
- Helicone integrates with — Langfuse's integrations directory has a Helicone integration page. (verified 2026-10-29)
- Kiro integrates with — Langfuse's integrations directory has a Kiro integration page. (verified 2026-10-29)
- LangChain (framework) integrates with — Langfuse's integrations directory has a LangChain (framework) integration page. (verified 2026-10-29)
- Langflow integrates with — Langfuse's integrations directory has a Langflow integration page. (verified 2026-10-29)
- LangGraph (orchestration) integrates with — Langfuse's integrations directory has a LangGraph (orchestration) integration page. (verified 2026-10-29)
- LiteLLM integrates with — Langfuse's integrations directory has a LiteLLM integration page. (verified 2026-10-29)
- LiveKit Agents integrates with — Langfuse's integrations directory has a LiveKit Agents integration page. (verified 2026-10-29)
- LlamaIndex (framework) integrates with — Langfuse's integrations directory has a LlamaIndex (framework) integration page. (verified 2026-10-29)
- Mastra integrates with — Langfuse's integrations directory has a Mastra integration page. (verified 2026-10-29)
- Microsoft Agent Framework integrates with — Langfuse's integrations directory has a Microsoft Agent Framework integration page. (verified 2026-10-29)
- Microsoft Semantic Kernel integrates with — Langfuse's integrations directory has a Microsoft Semantic Kernel integration page. (verified 2026-10-29)
- Milvus integrates with — Langfuse's integrations directory has a Milvus integration page. (verified 2026-10-29)
- Mistral Large 2 / Mixtral family integrates with — Langfuse's integrations directory has a Mistral Large 2 / Mixtral family integration page. (verified 2026-10-29)
- MLflow integrates with — Langfuse's integrations directory has a MLflow integration page. (verified 2026-10-29)
- Model Context Protocol (MCP spec) integrates with — Langfuse's integrations directory has a Model Context Protocol (MCP spec) integration page. (verified 2026-10-29)
- n8n (AI agent flows) integrates with — Langfuse's integrations directory has a n8n (AI agent flows) integration page. (verified 2026-10-29)
- OpenAI Agents SDK integrates with — Langfuse's integrations directory has a OpenAI Agents SDK integration page. (verified 2026-10-29)
- OpenAI Codex CLI integrates with — Langfuse's integrations directory has a OpenAI Codex CLI integration page. (verified 2026-10-29)
- OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) integrates with — Langfuse's integrations directory has a OpenAI GPT family (GPT-5 / GPT-4o / o3 / o4) integration page. (verified 2026-10-29)
- Opencode (SST) integrates with — Langfuse's integrations directory has a Opencode (SST) integration page. (verified 2026-10-29)
- OpenInference integrates with — Langfuse's integrations directory has a OpenInference integration page. (verified 2026-10-29)
- OpenLLMetry (Traceloop) integrates with — Langfuse's integrations directory has a OpenLLMetry (Traceloop) integration page. (verified 2026-10-29)
- OpenRouter integrates with — Langfuse's integrations directory has a OpenRouter integration page. (verified 2026-10-29)
- Phidata (now Agno) integrates with — Langfuse's integrations directory has a Phidata integration page. (verified 2026-10-29)
- Pipecat (Daily) integrates with — Langfuse's integrations directory has a Pipecat (Daily) integration page. (verified 2026-10-29)
- Portkey AI integrates with — Langfuse's integrations directory has a Portkey AI integration page. (verified 2026-10-29)
- Promptfoo integrates with — Langfuse's integrations directory has a Promptfoo integration page. (verified 2026-10-29)
- Pydantic-AI integrates with — Langfuse's integrations directory has a Pydantic-AI integration page. (verified 2026-10-29)
- Ragas integrates with — Langfuse's integrations directory has a Ragas integration page. (verified 2026-10-29)
- Restate integrates with — Langfuse's integrations directory has a Restate integration page. (verified 2026-10-29)
- smolagents (Hugging Face) integrates with — Langfuse's integrations directory has a smolagents (Hugging Face) integration page. (verified 2026-10-29)
- Spring AI ChatMemory integrates with — Langfuse's integrations directory has a Spring AI ChatMemory integration page. (verified 2026-10-29)
- Strands Agents (AWS) integrates with — Langfuse's integrations directory has a Strands Agents (AWS) integration page. (verified 2026-10-29)
- Temporal integrates with — Langfuse's integrations directory has a Temporal integration page. (verified 2026-10-29)
- Together AI integrates with — Langfuse's integrations directory has a Together AI integration page. (verified 2026-10-29)
- Vapi integrates with — Langfuse's integrations directory has a Vapi integration page. (verified 2026-10-29)
- Vercel AI SDK integrates with — Langfuse's integrations directory has a Vercel AI SDK integration page. (verified 2026-10-29)
- vLLM integrates with — Langfuse's integrations directory has a vLLM integration page. (verified 2026-10-29)
- xAI Grok 4 integrates with — Langfuse's integrations directory has a xAI Grok 4 integration page. (verified 2026-10-29)
Referenced by (26)
- agentgateway integrates with — agentgateway integrations docs have a Langfuse observability page. (verified 2026-10-29)
- CrewAI integrates with — CrewAI docs have a Langfuse observability integration page. (verified 2026-10-29)
- Dify integrates with — Dify monitoring integration: "Integrate with Langfuse" (tracing). (verified 2026-10-29)
- Google Agent Development Kit (ADK) integrates with — ADK integrations catalog has a "Langfuse observability for ADK" page (Open-source AI engineering platform to debug, analyze, and iterate on LLM applications). (verified 2026-10-29)
- Haystack (framework) integrates with — Haystack integrations directory has a langfuse integration page ("Monitor and trace your Haystack requests"). (verified 2026-10-29)
- Helicone integrates with — Helicone docs have a Langfuse integration page. (verified 2026-10-29)
- IBM ContextForge MCP Gateway integrates with — IBM ContextForge docs have a Langfuse observability page. (verified 2026-10-29)
- Laminar integrates with — Laminar integrations docs have a Langfuse observability page. (verified 2026-10-29)
- LangChain (framework) integrates with — LangChain docs have a LangFuse integration provider page (LLM engineering platform and observability). (verified 2026-10-29)
- Langflow integrates with — Langflow integration page: Langfuse tracing. (verified 2026-10-29)
- LiteLLM integrates with — LiteLLM docs have a Langfuse logging/observability integration page. (verified 2026-10-29)
- LlamaIndex (framework) integrates with — LlamaIndex has an official callback/observability integration package llama-index-callbacks-langfuse in its repo. (verified 2026-10-29)
- Mastra integrates with — Mastra repo ships the @mastra/langfuse observability exporter. (verified 2026-10-29)
- Milvus integrates with — Milvus's integrations overview lists a Milvus + Langfuse integration tutorial. (verified 2026-10-29)
- OpenAI Agents SDK integrates with — OpenAI Agents SDK tracing docs list Langfuse under external tracing processors. (verified 2026-10-29)
- OpenLLMetry (Traceloop) integrates with — OpenLLMetry docs have a page on exporting traces to Langfuse. (verified 2026-10-29)
- OpenRouter integrates with — OpenRouter Broadcast docs have a page for sending request traces to Langfuse. (verified 2026-10-29)
- Portkey AI integrates with — Portkey docs have a Langfuse tracing provider integration page. (verified 2026-10-29)
- Restate integrates with — Restate AI docs integration page: Langfuse ecosystem integration (trace Restate agents). (verified 2026-10-29)
- smolagents (Hugging Face) integrates with — smolagents inspect-runs tutorial has a section on setting up telemetry with Langfuse. (verified 2026-10-29)
- Strands Agents (AWS) integrates with — Strands Agents traces docs list Langfuse as a visualization option for its OpenTelemetry traces. (verified 2026-10-29)
- Temporal integrates with — Temporal integrations catalog lists Langfuse agent-observability integration. (verified 2026-10-29)
- TrueFoundry AI Gateway integrates with — TrueFoundry AI Gateway ecosystem lists a Langfuse integration page. (verified 2026-10-29)
- Vapi integrates with — Vapi docs list Langfuse as a provider/integration. (verified 2026-10-29)
- Vercel AI Gateway integrates with — Vercel AI Gateway docs have a Langfuse framework integration page. (verified 2026-10-29)
- Vercel AI SDK integrates with — AI SDK docs have a Langfuse observability integration page. (verified 2026-10-29)