Arize AI records 249,028 monthly visits with +3.2% month-over-month growth and Paid, Contact for Pricing pricing. Models.dev records 200,451 monthly visits with -3.9% growth and Free pricing.
Agent observability, evaluation, and continuous improvement for production AI
Open-source database of AI models, prices and capabilities
| Dimension / Metric | | |
|---|---|---|
| Official Domain | arize.com | models.dev |
| Pricing Model | Paid, Contact for Pricing | Free |
| Monthly Visits | 249.03K (249,028) | 200.45K (200,451) |
| MoM Traffic Delta | +7.67K (+3.2%) | -8.17K (-3.9%) |
| Primary Market & Share | 🇺🇸 United States (51.6%) | 🇨🇳 China (23%) |
| Direct Visits / mo | 107.84K | 136.32K |
| User Rating | 4.6 | 4.4 |
| Supported Platforms | Website | Website |
Agent observability, evaluation, and continuous improvement for production AI
Capture spans, traces, and sessions across agents and LLM calls using OpenInference conventions built on OpenTelemetry, so instrumentation stays portable.
Run evaluations at span, trace, and session level to grade retrieval quality, tool use, and final answers across large production datasets.
An in-product agent that inspects traces, diagnoses likely root causes, and proposes fixes that engineers can review before shipping.
Self-host the leading open-source tracing and eval tool when you need to keep trace data inside your own infrastructure.
Open-source database of AI models, prices and capabilities
Every model uses a consistent provider/model format so the same model across providers can be compared directly.
Side-by-side context window, output limit, reasoning, tool calling, structured output, and temperature support.
Input and output prices per million tokens listed alongside release and update dates.
Covers closed flagship APIs and open-weight models from many labs in one sortable catalogue.
Excels at experiment tracking and model registry workflows, but is less purpose-built for real-time LLM production observability.
Excels at experiment tracking and model registry workflows, but is less purpose-built for real-time LLM production observability.
SpecialistIncludes model pricing trackers and developer news alongside tools directories, but less focused on raw API specs.
SpecialistIncludes model pricing trackers and developer news alongside tools directories, but less focused on raw API specs.
Free / Open-sourceIncludes integrated guardrails and simulation tools, but is less mature for large-scale enterprise production telemetry monitoring.
Free / Open-sourceIncludes integrated guardrails and simulation tools, but is less mature for large-scale enterprise production telemetry monitoring.
Free / Open-sourceFeatures strong testing and prompt evaluation tools, though its monitoring interface is less oriented towards massive telemetry streams.
Free / Open-sourceFeatures strong testing and prompt evaluation tools, though its monitoring interface is less oriented towards massive telemetry streams.
Focuses heavily on prompt management and versioning control, whereas Arize prioritizes end-to-end tracing and ML observability.
Focuses heavily on prompt management and versioning control, whereas Arize prioritizes end-to-end tracing and ML observability.
Offers comprehensive LLM evaluation and unit testing via DeepEval, but lacks Arize's deep production monitoring infrastructure.
Offers comprehensive LLM evaluation and unit testing via DeepEval, but lacks Arize's deep production monitoring infrastructure.
Free / Open-sourceAgent observability, evals and governance for AI platform teams
Free / Open-sourceAgent observability, evals and governance for AI platform teams
SpecialistStronger focus on compliance enforcement and AI governance, but less specialized for deep developer tracing workflows.
SpecialistStronger focus on compliance enforcement and AI governance, but less specialized for deep developer tracing workflows.
Free / Open-sourceOpen-source observability that finds your AI agent's failures — and fixes them
Free / Open-sourceOpen-source observability that finds your AI agent's failures — and fixes them
Free / Open-sourceOpen-source workspace for building, evaluating and shipping AI agents
Free / Open-sourceOpen-source workspace for building, evaluating and shipping AI agents
Provides enterprise governance and model explainability features, but has a steeper setup curve for pure LLM tracing.
Provides enterprise governance and model explainability features, but has a steeper setup curve for pure LLM tracing.
SpecialistCatalogues and compares AI infrastructure tools and services across categories, but lacks deep per-token pricing tables.
SpecialistCatalogues and compares AI infrastructure tools and services across categories, but lacks deep per-token pricing tables.
