Arize AI records 249,028 monthly visits with +3.2% month-over-month growth and Paid, Contact for Pricing pricing. Modal records 1,196,021 monthly visits with +30.2% growth and Freemium, Contact for Pricing pricing.
Agent observability, evaluation, and continuous improvement for production AI
Serverless cloud infrastructure for AI and data workloads
| Dimension / Metric | | |
|---|---|---|
| Official Domain | arize.com | modal.com |
| Pricing Model | Paid, Contact for Pricing | Freemium, Contact for Pricing |
| Monthly Visits | 249.03K (249,028) | 1.2M (1,196,021) |
| MoM Traffic Delta | +7.67K (+3.2%) | +277.18K (+30.2%) |
| Primary Market & Share | 🇺🇸 United States (51.6%) | 🇺🇸 United States (43.9%) |
| Direct Visits / mo | 107.84K | 845.64K |
| User Rating | 4.6 | 4.8 |
| 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.
Serverless cloud infrastructure for AI and data workloads
Write plain Python, attach GPUs or containers, and deploy HTTPS endpoints that autoscale with traffic and scale to zero when idle.
Launch isolated, secure environments for coding agents, RL rollouts, and untrusted code, with sub-second starts and support for over a million concurrent sandboxes.
Run fine-tunes, LoRA, full training, and reinforcement learning on elastic single or multi-node GPU capacity with no quota requests.
Serve LLMs and image, video, or audio models through OpenAI-compatible endpoints, or bring your own inference stack and let Modal handle the infrastructure.
SpecialistExtremely fast serverless execution optimized specifically for generative media models rather than general Python code.
SpecialistExtremely fast serverless execution optimized specifically for generative media models rather than general Python code.
Provides flexible GPU infrastructure and serverless endpoints, though less focused on pure Python function decorators.
Provides flexible GPU infrastructure and serverless endpoints, though less focused on pure Python function decorators.
SpecialistFocuses heavily on managed open-source model inference APIs rather than arbitrary custom container execution.
SpecialistFocuses heavily on managed open-source model inference APIs rather than arbitrary custom container execution.
Rent cloud GPUs by the second from a global marketplace
Rent cloud GPUs by the second from a global marketplace
Delivers robust enterprise GPU clusters and managed inference, requiring more infrastructure setup than Modal's serverless approach.
Delivers robust enterprise GPU clusters and managed inference, requiring more infrastructure setup than Modal's serverless approach.
Easier model packaging via Cog, but offers less arbitrary serverless Python container execution than Modal.
Easier model packaging via Cog, but offers less arbitrary serverless Python container execution than Modal.
SpecialistLow-cost serverless inference APIs for 200+ open models
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.
Provides integrated development studios and training workflows, but with less granular serverless function orchestration.
Provides integrated development studios and training workflows, but with less granular serverless function orchestration.
SpecialistCombines ready-to-use model APIs and serverless GPU jobs, with simpler API consumption than custom Modal apps.
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.
