Comparison
| Tool | Price from | Free plan | Category |
|---|---|---|---|
 Helicone | 79 USD/mo | yes | APIs & models |
 Arize Phoenix | 50 USD/mo | yes | APIs & models |
 LLM | not listed | yes | APIs & models |
 Together AI | not listed | ? | APIs & models |
 OpenRouter | not listed | yes | APIs & models |
 Groq | not listed | ? | APIs & models |
 Google AI Studio | 0,75 USD | ? | APIs & models |
 OpenAI Platform | 0,10 USD | ? | APIs & models |
 Cleanlab | not listed | ? | APIs & models |
Each alternative in short
1. Arize Phoenix
Open-source tool for tracing, evaluating and debugging LLM apps and AI agents, for developers who want to self-host.
Yes, there is a free plan. Phoenix OSS is open source and can be run locally or self-hosted. AX Free includes 25k spans per month, 1 GB ingestion and 15 days retention, with unlimited users and evals.
2. LLM
Command-line tool and Python library for running prompts against many LLMs, both remote APIs and local models.
Yes, there is a free plan. Open source tool installed locally; the cost depends on the API provider or local model you use.
3. Together AI
Full-stack AI cloud for running open-source models via API, fine-tuning them, and renting GPU clusters, aimed at developers and AI companies.
The vendor does not state this clearly on the homepage or pricing page.
4. OpenRouter
A unified API and chat interface giving access to 500+ AI models from 80+ providers, for developers and teams who want one key and better uptime.
Yes, there is a free plan. Free plan: 25+ free models, 4 free providers, chat and API access, activity logs, 5 workspaces, 50 requests/day, community support.
5. Groq
Fast AI inference cloud for developers and companies running AI models at scale, built on Groq's LPU chips.
The vendor does not state this clearly on the homepage or pricing page.
6. Google AI Studio
Browser-based workspace for developers to prototype with Gemini and other Google AI models, then move the same work to production via the Gemini API.
The vendor does not state this clearly on the homepage or pricing page.
7. OpenAI Platform
Developer platform for building applications with the OpenAI API, aimed at software developers.
The vendor does not state this clearly on the homepage or pricing page.
8. Cleanlab
Platform for monitoring, evaluating and fixing AI safety risks, hallucinations and data errors for teams building AI applications.
The vendor does not state this clearly on the homepage or pricing page.
FAQ
What is the best alternative to Helicone?
The most popular option in the same category is Arize Phoenix. See the comparison table above.