Helicone.ai

About Helicone.ai

Products by Helicone.ai

All products by Helicone.ai reviewed by our AI panel of experts.

HeliconeLLM Platforms

Open-source LLM observability for usage, cost, and latency monitoring

From $79/mo7.9/10

How Our Review Panel Scores Helicone.ai

Six independent reviewer personalities assessed Helicone.ai's product on their own terms. They landed within 0.5 points of each other, an unusually strong consensus.

Averaged across 1 reviewed product in our catalog. Scores are out of 10.

Competitive Landscape

Who Helicone.ai competes with, and how they differ.

Langfuse8.0/10

The closest direct analog: also open-source, YC-adjacent, and integrated via a drop-in SDK/proxy rather than Helicone's gateway-first model; Langfuse leans harder into prompt management and dataset-based evals, and was itself acquired (by ClickHouse, Jan 2026) in the same observability consolidation wave.

1 product reviewed on TopReviewed

LangSmith (LangChain)8.1/10

Tightly bundled with the LangChain/LangGraph framework, giving it default distribution among LangChain-based agent builders that Helicone must win on provider-agnostic integration instead.

2 products reviewed on TopReviewed

Arize Phoenix (Arize AI)8.1/10

Open-source, OpenTelemetry-based tracing with a heavier focus on enterprise ML observability and evaluation research pedigree; Arize monetizes a hosted enterprise tier around the same OSS core rather than a gateway product.

1 product reviewed on TopReviewed

Braintrust8.0/10

Positions around evals and prompt experimentation for enterprise AI teams with a closed-source, sales-led product, versus Helicone's open-source, self-serve, developer-first entry point.

1 product reviewed on TopReviewed

Datadog LLM Observability7.0/10

An add-on inside Datadog's existing enterprise observability suite; wins accounts already standardized on Datadog for infra monitoring, where Helicone competes as a purpose-built, cheaper point solution.

1 product reviewed on TopReviewed

Galileo AI7.7/10

Focuses on evaluation and guardrails for agentic/enterprise deployments with a closed-source platform; Galileo was acquired by Cisco (May 2026) in the same wave that saw Helicone absorbed by Mintlify.

1 product reviewed on TopReviewed

Company Timeline

Key milestones in Helicone.ai's history, with sources.

1. Mar 3, 2026Acquisition

   Acquired by Mintlify

   Mintlify announced it acquired Helicone, the open-source LLM observability platform and AI gateway; founders Justin Torre and Cole Gottdank joined Mintlify in San Francisco, and Helicone's product continues in maintenance mode (security and model updates, no new feature roadmap).

   mintlify.com
2. Apr 14, 2025Launch

   Launched the open-source Helicone AI Gateway

   Helicone released the AI Gateway, a standalone open-source (GPL-3.0) multi-provider LLM gateway offering a single OpenAI-compatible endpoint across 100+ models, as a separate GitHub repository from its core observability product.

   github.com
3. Aug 29, 2024Milestone

   Ranked #1 Product of the Day on Product Hunt

   Helicone's Product Hunt launch reached #1 Product of the Day, a milestone the team documented in its own changelog and follow-up blog posts about the launch.

   helicone.ai
4. Jan 31, 2023Launch

   Open-sourced the Helicone LLM observability platform

   Helicone published its core observability platform to GitHub under the Apache License 2.0, offering one-line-of-code integration to monitor, evaluate, and experiment with LLM applications.

   github.com
5. 2023Founded

   Founded in San Francisco; joined Y Combinator W23

   Helicone was founded in 2023 in San Francisco (co-founders identified across sources as Justin Torre, Cole Gottdank, Barak Oshri and Scott Nguyen) and admitted to Y Combinator's Winter 2023 batch.

   ycombinator.com