
Langfuse
liteLLM
Portkey
LangSmith
OpenRouter
Eden AI
LangChain
Open-source LLM Observability for Developers

JSON Server
JSON Placeholder
ReqRes
mocki Fake JSON API
Codegrepper is a unique platform that provides Fake Rest API, which you can use for prototyping, testing, and many other purposes.

Which is more popular?
Based on our record, Helicone AI seems to be more popular. It has been mentioned 5 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | helicone.ai | grepper.com |
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An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
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How often each product is chosen within a category, 0–100% relative to the other.


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Recommendations tracked on public social media and blogs since March 2021.


Helicone takes the simplest possible approach to LLM monitoring: it's a proxy. Change your OpenAI base URL from api.openai.com to oai.helicone.ai, add your Helicone API key as a header, and every LLM request is logged — latency, tokens,... - Source: dev.to / 5 months ago
You're monitoring production traffic. You need Langfuse / Phoenix / Helicone / Braintrust for that. Online eval is a different problem class: implicit feedback, drift detection, hallucination rates on your data, not on HellaSwag. - Source: dev.to / 5 months ago
For many teams, especially those starting out or with simpler needs, commercial solutions like Portkey, Helicone, OpenPipe, or LiteLLM Proxy offer off-the-shelf capabilities that cover many common proxy use cases (caching, logging, cost... - Source: dev.to / 7 months ago
Tracking Codegrepper since Jul 2021.
When comparing Helicone AI and Codegrepper, you can also consider the following products.

Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.
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Get a full fake REST API with zero coding in less than 30 seconds. For front-end developers who need a quick back-end for prototyping and mocking
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JSON Placeholder is a modern platform that provides you online REST API, which you can instantly use whenever you need any fake data.
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Build production-grade & reliable AI apps with Portkey
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A hosted REST-API ready to respond to your AJAX requests.
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