Broader template library and multi-channel sharing features, but less flexible multi-page layout customization than Fillout.
Arize AI records 249,028 monthly visits with +3.2% month-over-month growth and Paid, Contact for Pricing pricing. Fillout records 3,923,917 monthly visits with -9.7% growth and Freemium pricing.

Agent observability, evaluation, and continuous improvement for production AI
| Dimension / Metric | ![]() | |
|---|---|---|
| Official Domain | arize.com | fillout.com |
| Pricing Model | Paid, Contact for Pricing | Freemium |
| Monthly Visits | 249.03K (249,028) | 3.92M (3,923,917) |
| MoM Traffic Delta | +7.67K (+3.2%) | -423.16K (-9.7%) |
| Primary Market & Share | 🇺🇸 United States (51.6%) | 🇺🇸 United States (38.6%) |
| Direct Visits / mo | 107.84K | 2.31M |
| 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.
Build powerful forms, surveys and quizzes with AI in minutes
Describe the form you need in plain language and Zite generates a branded form with logic, file uploads, and payments.
Add conditional logic, intelligent routing, and multi-step workflows to automate what happens after each response.
Respondents can log in to update their answers, and forms can be restricted to internal users only.
Use custom themes, fonts, logos, custom CSS, your own domain, and embed forms as popups, sliders, or full-screen pages.
Broader template library and multi-channel sharing features, but less flexible multi-page layout customization than Fillout.

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.
SpecialistSuperior privacy-first encryption and secure data handling, but more restrictive workflow automation and styling capabilities.
SpecialistSuperior privacy-first encryption and secure data handling, but more restrictive workflow automation and styling capabilities.

Faster AI form generation with built-in logic, but fewer advanced database integration and multi-page routing features.

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.

SpecialistAI quiz, poll and survey builder that turns traffic into leads
SpecialistAI quiz, poll and survey builder that turns traffic into leads

Includes unique MCP server support and fast AI form generation, but less mature ecosystem and third-party integrations.

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-sourceFully open-source form builder with AI assistance, but lacks some of the advanced visual design customizability of Fillout.

SpecialistAI-moderated voice and video interviews that scale survey research to thousands of people at once