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

IT Tools
DevToys
CyberChef
WebsiteGeek WebTools Suite
BestToolsKit
NanoUtil
FreeToolkit
DeveloperToolsKit offers 35+ free, browser-based developer tools to boost productivity—no registration, no data tracking. Format JSON, generate hashes, create color palettes, and more. Fast, intuitive, and always available.

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 | developertoolskit.com |
| Pricing | ||
| Company | — | Startup from Turkey · 1 - 9 employees · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of Helicone AI yet.
DeveloperToolsKit is a powerful collection of 35+ essential online developer tools designed to simplify and accelerate your daily development workflow. Whether you’re formatting JSON, converting text cases, generating secure passwords, creating color palettes, or analyzing CSV files,...
What each product offers, as listed by its team.


No features have been listed yet.
Possible disadvantages
An editorial look at what each product does well and who it suits.


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


As answered by people managing Helicone AI and DeveloperToolsKit.
DeveloperToolsKit's answer:
Next.js (React) Node.js
DeveloperToolsKit's answer:
DeveloperToolsKit combines 35+ frequently used developer tools into a clean, fast, and modern interface—entirely in your browser, with no tracking, no registration, and no fluff. It's built with a privacy-first mindset and designed for speed and simplicity.
DeveloperToolsKit's answer:
Unlike many cluttered or ad-heavy alternatives, DeveloperToolsKit offers a seamless, ad-free experience with blazing fast performance. All tools are 100% free, mobile-friendly, and require no sign-up. It respects your privacy and saves you time.
DeveloperToolsKit's answer:
Our primary audience includes frontend and backend developers, DevOps engineers, software testers, and coding students who need reliable tools for data formatting, encoding, hashing, and more—accessible anytime, from anywhere.
DeveloperToolsKit's answer:
DeveloperToolsKit was created out of a developer's frustration with having to jump between dozens of different websites for simple, repetitive tasks. The goal was clear: bring the most essential tools together in one lightweight, private, and intuitive toolkit.
Share your experience with using Helicone AI and DeveloperToolsKit. For example, how are they different and which one is better?
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 / 4 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 DeveloperToolsKit since Jun 2025.
When comparing Helicone AI and DeveloperToolsKit, 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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IT Tools is a free and open-source collection of handy online tools for developers & people working in IT.
Compare IT Tools to Helicone AI or DeveloperToolsKit:

Build and deploy LLM applications with confidence
Compare LangSmith to Helicone AI or DeveloperToolsKit:

A collection of converters, formaters, encoders, generators and other tools for your Windows desktop.
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Build production-grade & reliable AI apps with Portkey
Compare Portkey to Helicone AI or DeveloperToolsKit:
