Agentic Index
Arize AI vs Galileo (2026)
Choose Arize AI for observability rooted in production ML monitoring with the open source Phoenix core, and choose Galileo for managed evaluation with vendor maintained metrics and inline guardrails. That verdict is the Agentic Index coverage score, graded from each vendor's own published materials.
Arize starts at 50 dollars a month with a free tier, while Galileo starts at 100 dollars a month billed yearly with a free tier. Galileo is now owned by Cisco, and its documentation says it became Splunk Agent Observability on 7 August 2026, while galileo.ai still sells the Galileo plans quoted here. Arize leans toward monitoring what production systems do; Galileo leans toward judging and gating what models say.
On the Agentic Index agent infrastructure ranking, Arize AI and Galileo both clear the bar: each documents all five production contract capabilities in full. 34 of the 186 vendors in the lane clear it. See the agent infrastructure ranking
This comparison is published by Agentic Index, an independent agentic AI vendor research platform. Arize AI and Galileo are each graded against the same 14 capability Agentic Index taxonomy, from the vendor's own public materials under the Agentic Index verification standard, alongside 956 researched vendors. No vendor pays for placement and no vendor has reviewed this page. How this evidence is graded
Choose Arize AI if
- Unified observability across classic ML and LLM workloads is the mandate
- An open source core keeps your tracing portable if you change vendors
- Production monitoring depth outranks prebuilt evaluation metrics
Choose Galileo if
- Twenty plus maintained metrics and Luna judge models replace eval engineering
- Low latency inline guardrailing is part of the production requirement
- You want automated failure clustering rather than dashboards to interpret
| At a glance | Arize AI | Galileo |
|---|---|---|
| Category | Agent infrastructure | Agent infrastructure |
| Entry price | From $50/mo · free tier + open source | From $100/mo billed yearly · free tier |
| Free / trial | AX Free (25k spans/mo, 1 GB, 15 day retention, 10 Signal issues/mo) and Phoenix open source, both free | Free tier: 5,000 traces/month, unlimited users, unlimited custom evals, no card |
| Pricing confidence | public exact | public exact |
| Feature | A Arize AI |
G Galileo |
|---|---|---|
| Action & orchestration | ||
|
Integrations & Tool Calling Ability to connect agents to real systems through native integrations, OAuth-authenticated actions, custom tools, APIs, webhooks, or MCP-compatible tools. |
Partial | Partial |
|
Workflow Orchestration Ability to sequence, branch, retry, route, and combine deterministic workflow nodes with autonomous agent steps. |
No / Not documented | No / Not documented |
|
Triggers & Channel Coverage How agents wake up and where they work: schedules, webhooks, message events, CRM events, inbox events, chat, email, voice, and collaboration tools. |
Full / Explicit | Full / Explicit |
| Knowledge & context | ||
|
Knowledge Grounding & RAG Ability to ground agent behavior in company data through document ingestion, retrieval, external knowledge APIs, semantic search, or RAG layers. |
No / Not documented | No / Not documented |
|
Memory & State Persistence Ability to persist context across a run, conversation, workflow, user, team, or longer-term memory layer. |
No / Not documented | No / Not documented |
| Control & trust | ||
|
Human Oversight & Guardrails Approval steps, consent checkpoints, escalation rules, structured guardrails, policy constraints, and pause/resume controls. |
Partial | Full / Explicit |
|
Security, Identity & Governance RBAC, SSO, auditability, encryption, least-privilege tool access, compliance posture, and data handling policy. |
Full / Explicit | Full / Explicit |
|
Observability & Auditability Traces, logs, execution histories, metrics, audit events, and debugging detail for production agent behavior. |
Full / Explicit | Full / Explicit |
|
Deployment & Data Residency Deployment modes and options, including SaaS, dedicated cloud, VPC, on-prem, hybrid, local runtime, and self-hosting. |
Full / Explicit | Full / Explicit |
| Solution readiness | ||
|
Prebuilt Agents, Templates & Packs Ready-made workflows, packaged employees, templates, blueprints, industry solutions, and role-specific agents that reduce time-to-value. |
Full / Explicit | Partial |
| Platform extensibility | ||
|
Model Flexibility & Routing Ability to work across multiple foundation models, route tasks to different models, or let buyers bring their own providers and keys. |
Full / Explicit | Full / Explicit |
|
APIs, SDKs & MCP Extensibility Composability layer: stable APIs, SDKs, MCP tool consumption/serving, custom tools, and integration into internal systems. |
Full / Explicit | Full / Explicit |
|
Testing, Debugging & Optimization Testing, debugging, scoring, retries, fallbacks, quality gates, and optimization loops for improving agent workflows before and after deployment. |
Full / Explicit | Full / Explicit |
| Specialist automation | ||
|
Browser & Computer Use Browser, desktop, or remote/local computer control for workflows that cannot be handled through stable APIs alone. |
No / Not documented | No / Not documented |
Pricing snapshot
Sourced from the Index pricing dataset · open each vendor's profile for full detail.
| Pricing | A Arize AI |
G Galileo |
|---|---|---|
|
Entry price Lowest public entry point |
From $50/mo · free tier + open source | From $100/mo billed yearly · free tier |
|
Pricing confidence How public the numbers are |
Public, exact | Public, exact |
|
Billing Primary billing axis |
Flat monthly plan with usage overage on trace spans and ingestion (GB) | Monthly traces within subscription tiers; Pro pricing scales with trace volume |
|
Variable cost Workload / overage exposure |
Medium variable cost | Medium variable cost |
|
Free tier / trial Try before you buy |
Free tier
|
Free tier
|
|
Buying motion Self-serve vs sales call |
Mixed | Self-serve |
Galileo is owned by Cisco. Its documentation says it became Splunk Agent Observability on 7 August 2026 and points customers who joined after that date to Splunk's documentation. galileo.ai still sells the Galileo plans quoted on this page.
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