Helicone
Acquired
Acquired by Mintlify
Open-source LLM observability gateway (Rust-based). Note: As of 2025-2026, Helicone is in maintenance mode with no new features planned.
Helicone is an open-source LLM observability platform and AI gateway for logging, monitoring, routing, debugging, and cost/latency tracking across LLM requests; after Mintlify acquisition, services remain live in maintenance mode.
Positioning
LLM observability platform
Key facts
- HQ location
- San Francisco, CA, USA
- Founded
- 2023
- Employee range
- 11-50 (11-50)
- Funding stage
- Acquired
- Company type
- Unknown (Acquired by Mintlify / open-source project in maintenance mode)
- Pricing model
- Subscription Usage Based (Usage-based SaaS)
- Last updated
- Jun 21, 2026
Revenue estimate
Unknown
Valuation estimate
Unknown
Investments
Acquired by Mintlify in Mar 2026; prior funding undisclosed/limited public information
Target customers
Developers running LLM applications
Key competitors
Langfuse, LangSmith, PromptLayer, Arize AI
Known customers
Unknown
Classification (raw research text)
- Core focus
- LLM monitoring and analytics
- Core industry
- Enterprise AI development
- Core category
- LLM observability tooling
Shown verbatim from the research spreadsheet — deriving structured segment/industry tags from this text is a future phase.
Attribute breakdown
- System / API Integration Primary focus
- Prompt Management / Prompt Engineering Secondary feature
- Retrieval-Augmented Generation Secondary feature
- AI / LLM Data Pipeline Secondary feature
- Model Deployment / Inference Infrastructure Secondary feature
- AI Quality Assurance / LLM Evaluation Secondary feature
- AI Observability / Monitoring Primary focus
- AI Security / Guardrails Secondary feature
- Data Privacy / PII / Confidential AI Secondary feature
- AI Governance / Policy Management Secondary feature
- AI Risk / Compliance Secondary feature
- AI Asset Inventory / Model Registry Secondary feature
- Human-in-the-Loop Review / Feedback Secondary feature
- Analytics / BI / Decision Intelligence Secondary feature
Show all 32 attributes
- AI Workflows Not emphasized
- AI Automation / Business Process Automation Not emphasized
- AI Fine-tuning / Custom Model Training Not emphasized
- Agent Builder / Agent Configuration Not emphasized
- Multi-agent Orchestration / Runtime Not emphasized
- System / API Integration Primary focus
- Prompt Management / Prompt Engineering Secondary feature
- Retrieval-Augmented Generation Secondary feature
- Graph RAG / Knowledge Graph Retrieval Not emphasized
- Enterprise Search / Knowledge Management Not emphasized
- AI / LLM Data Pipeline Secondary feature
- Document AI / Document Processing Not emphasized
- Model Deployment / Inference Infrastructure Secondary feature
- Traditional Machine Learning Not emphasized
- AI Quality Assurance / LLM Evaluation Secondary feature
- AI Observability / Monitoring Primary focus
- AI Security / Guardrails Secondary feature
- Data Privacy / PII / Confidential AI Secondary feature
- AI Governance / Policy Management Secondary feature
- AI Risk / Compliance Secondary feature
- AI Asset Inventory / Model Registry Secondary feature
- Human-in-the-Loop Review / Feedback Secondary feature
- Call Transcription / Speech-to-Text Data Capture Not emphasized
- Conversation Intelligence / Speech Analytics Not emphasized
- Text Chatbots / Conversational Assistants Not emphasized
- Voice AI Agents Not emphasized
- Voice Infrastructure / STT / TTS Not emphasized
- AI for Customer Experience / Support Automation Not emphasized
- Sales / Revenue Intelligence Not emphasized
- Analytics / BI / Decision Intelligence Secondary feature
- Enterprise App / Internal Tool Builder Not emphasized
- Vertical-Specific AI Not emphasized