Helicone
Helicone is an open-source LLM observability platform and AI gateway that lets developers monitor, route, cache, and debug generative AI applications across 100+ models via single-line proxy integration, serving AI builders and enterprises on a freemium volumetric pricing model.
- Company typePrivate
- Founded2022
- HeadquartersSan Francisco, United States
- Headcount1–10
- GTM typeB2B
- OfferingSoftware
What Helicone does
Helicone is an open-source observability and AI gateway platform for generative AI applications. The product is built as a proxy layer that sits between customer applications and LLM providers, enabling developers to log, monitor, route, cache, and debug LLM traffic with a single line of code integration. The platform supports over 100 models across 20+ providers including OpenAI, Anthropic, Azure, AWS Bedrock, Google Vertex AI, Groq, DeepSeek, Together AI, and OpenRouter, and offers native integrations with LangChain, LlamaIndex, LangGraph, Dify, and n8n. Core modules include the Helicone Observability Platform (latency, cost, token, and error analytics), the AI Gateway (Rust-based proxy for routing, load balancing, semantic caching, and automatic failover), Prompt Management (versioning and instant deployment), Experiments (spreadsheet-style prompt A/B testing with LLM-as-judge evaluators), Datasets (JSONL export for fine-tuning), Sessions (multi-step agent workflow debugging), Evaluators, Vault (API key management), and self-hosting via a single Docker command.
Helicone serves developers and AI startups building LLM-powered applications, with a secondary motion into regulated enterprises via self-hosting, SOC2 Type II certification, and HIPAA compliance. Named customers span AI tooling (DeepAI, Greptile, Wordware, Charm, Cogna, Tusk, Brand.dev), customer support (Chatwith), education (DeAP Learning), and solar/energy (Sunrun). The business model is a freemium volumetric PLG motion: 10,000 free requests per month, self-serve sign-up with no credit card required, usage-based paid plans beyond the free tier, passthrough billing on the AI Gateway, and enterprise self-hosted subscriptions. The company was Y Combinator-backed with a $1.5M seed round in April 2023 and was acquired by Mintlify on March 3, 2026, combining observability with developer documentation tooling under a unified AI knowledge infrastructure offering.
Helicone firmographics
Firmographics- Name
- Helicone
- Legal name
- Helicone, Inc.
- Website
- https://helicone.ai
- Company type
- Private
- Founded year
- 2022
- Operating status
- Acquired
- Headcount range
- 1–10 employees
- Short description
- Helicone is an open-source LLM observability platform and AI gateway that lets developers monitor, route, cache, and debug generative AI applications across 100+ models via single-line proxy integration, serving AI builders and enterprises on a freemium volumetric pricing model.
- Ownership category
- akta.pro rank
Helicone industry classification
Industry- Product category
- LLM Observability & AI Gateway
- NAICS
- Computer Systems Design and Related Services (5415), Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (5182)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370), Services-Computer Integrated Systems Design (7373)
- akta.pro primary industry
- LLMOps & Generative AI Platforms (Prompt/Agent Orchestration, RAG) (HDAEANAD)
Keywords
Where Helicone is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Markets served
Helicone business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Operations, Marketing or Sales
Revenue model
- SaaS Subscription (Volumetric Pricing): Helicone operates on a volumetric pricing model where customers pay based on request volume. The first 10,000 requests per month are free. Paid plans scale with usage, making it cost-effective for businesses to start and grow. The platform offers self-serve sign-up with no credit card required and a 7-day free trial.
- Self-Hosting (Enterprise): Organizations with strict security and compliance requirements can self-host Helicone within their own infrastructure using Docker, enabling complete data sovereignty while still accessing the observability platform.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Monthly | Free tier with 10,000 requests per month |
| Usage-based | Pay-as-you-go | Pay-as-you-go volumetric pricing for growing teams |
| Subscription | Annual | Enterprise/Self-hosted plans |
Go-to-market motion2 records
Distribution channels3 records
Marketing channels8 records
Helicone product offering
Product offeringCore offering
Helicone provides an open-source LLM observability platform and AI Gateway that sits as a proxy between applications and LLM providers. It enables developers to monitor, debug, route, cache, and analyze their LLM traffic across 100+ models and 20+ providers with one-line integration. The platform supports prompt versioning, experimentation, evaluation, dataset export, and self-hosting for enterprises with strict compliance needs.
Product overview
Helicone is an open-source LLM observability and AI gateway platform designed for developers to monitor, debug, and optimize AI applications. The product portfolio centers on the core Helicone Observability Platform, which integrates with the Helicone AI Gateway to provide a unified solution for LLM traffic management and analytics. Key modules include Prompt Management for prompt versioning and deployment, Experiments for A/B testing prompts, Datasets for training data export, Playground for interactive testing, Sessions for multi-turn workflow visualization, and Evaluators for output quality assessment. The AI Gateway acts as a proxy layer enabling smart routing, caching, and load balancing across multiple LLM providers. The platform supports both cloud-hosted and self-hosted deployment options.
Differentiator
Problem solved
Functional benefit
Brands
- Helicone AI Gateway: High-performance proxy for routing, caching, and managing LLM traffic at scale with smart load balancing, intelligent caching, automatic failover, and rate limiting.
Products and services
- Helicone Observability Platform Open-source LLM observability and monitoring platform enabling developers to monitor, debug, and optimize AI applications with real-time insights into latency, costs, and model performance.
- Helicone AI Gateway High-performance proxy for routing, caching, and managing LLM traffic at scale with smart load balancing, intelligent caching, automatic failover, and rate limiting across multiple LLM providers.
- Prompt Management Version-controlled prompt management system with typed variables, instant deployment without code changes, real-time testing in Playground, and dynamic schemas for tools and response formatting.
- Experiments LLM prompt experimentation platform with spreadsheet-like interface for testing prompts, running evaluators, and comparing outputs before production deployment.
- Playground Interactive testing environment for prompts and models with streaming responses, enhanced tool rendering, and integrated markdown editing.
- Sessions Multi-turn agent workflow visualization and debugging tool that groups related LLM interactions, providing average latency, total cost, and cleaner UI for debugging multi-turn interactions.
- Evaluators Online evaluation framework for assessing LLM output quality with customizable metrics and real-time feedback, including LLM-as-judge evaluators.
- Datasets Data organization tool for creating and managing AI training datasets from request logs, supporting export to JSONL format for fine-tuning.
- Helicone Self-Hosting Self-hosted deployment option deployable via a single Docker command, enabling organizations with strict security and compliance requirements to keep all LLM interactions within their own infrastructure.
Quantifiable outcome
- Cut LLM costs by 65% and reduced LLM errors for DeepAI
- +2 more outcomes
Companies that use Helicone
Customer profileNamed customers10 records
Segments2 records
Ideal customer profiles2 records
Helicone technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration23 records
AI capability8 records
Feature14 records
Helicone partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- MintlifycoreHelicone was acquired by Mintlify on March 3, 2026. After three years and 14.2 trillion tokens logged, Helicone joined Mintlify to combine observability with documentation, advancing AI knowledge infrastructure. The merged company offers integrated AI observability, debugging, and documentation capabilities under a unified umbrella.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
Helicone competitors and assessment
Company assessmentMarket position
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Helicone social profiles
Digital presenceHelicone compliance and trust
Trust signalCompliance2 records
Helicone financial estimates
Financial estimateRevenue estimate
Valuation estimate
Helicone leadership team
Management profileNumber of profiles
Profiles2 records
Helicone funding detail
Funding detailFunding overview
Funding rounds1 record
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Helicone M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Helicone
What does Helicone do?
Helicone provides an open-source LLM observability platform and AI Gateway that sits as a proxy between applications and LLM providers. It enables developers to monitor, debug, route, cache, and analyze their LLM traffic across 100+ models and 20+ providers with one-line integration. The platform supports prompt versioning, experimentation, evaluation, dataset export, and self-hosting for enterprises with strict compliance needs.
Is Helicone a public or private company?
Helicone is a private company. It is classified as venture growth investor backed and is currently acquired.
When was Helicone founded?
Helicone was founded in 2022. It employs 1 to 10 people.
Where is Helicone based?
Helicone is headquartered in San Francisco, United States, in the North America region.
How does Helicone make money?
Two revenue lines are on record. SaaS Subscription (Volumetric Pricing) is the primary driver. The others are self-Hosting (Enterprise).
Does Helicone have an API?
Yes. Helicone provides a GraphQL API for data extraction and custom report generation, enabling programmatic access to logged LLM requests and analytics. The API supports webhook integrations for real-time event processing, including request/response data, evaluation scoring, and configurable data sampling. Developer documentation is at docs.helicone.ai.
What industry is Helicone in?
Helicone's product category is LLM Observability & AI Gateway. Its primary akta.pro industry code is HDAEANAD, LLMOps & Generative AI Platforms (Prompt/Agent Orchestration, RAG). Its NAICS code is 5415 and its SIC code is 7370.