Arize AIvs
Helicone
Helicone: Helicone provides open-source LLM observability with a gateway-based approach.
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AI engineering platform for observability and evaluation of agents and LLM apps
Overview
Arize AX is a managed AI engineering platform providing observability, evaluation, and continuous improvement for AI agents and LLM applications. It offers end-to-end tracing built on OpenInference standards, evaluation frameworks that run at the span, trace, and session level, and workflows to test and improve prompts before deployment, alongside an open-format datastore for GenAI traces.
The honest half
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Arize AI.
Cross-shopped
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Helicone: Helicone provides open-source LLM observability with a gateway-based approach.
Pricing
Taken from the vendor's own pricing page. Prices move, so check before you buy.
AX Free
Free
AX Pro
$50 /mo
AX Enterprise
On request
Capabilities
End-to-end tracing
Traces LLM and agent requests using the open OpenInference standard.
Evaluation framework
Runs span, trace, and session-level evaluations at scale.
Prompt testing and improvement
Tests and refines prompts before they reach production.
Alyx AI engineering agent
Debugs observability issues and generates review-ready fixes automatically.
Custom dashboards
Builds custom dashboards and metrics across unlimited users and experiments.
Data warehouse integrations
Connects the open-format ADB datastore to BigQuery, Databricks, and Snowflake.
Answered, with sources
Each answer names the page it came from, so you can check it rather than take our word for it.
Arize AX offers a free plan, a Pro plan at $50/month, and a custom-priced Enterprise plan, with pricing based on trace spans, storage, and retention needs.
SourceThe AX Free plan includes 25,000 trace spans and 1 GB of storage per month with 15-day retention, plus unlimited users, evaluations, and experiments.
SourceFree and Pro plans are SaaS-only, while Enterprise customers can choose SaaS or self-hosted deployment with custom SLAs.
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