Braintrust
AI Infrastructure
Tracks and evaluates AI agents for quality and performance.
- AI Evaluation
- LLM Evaluation
- AI Testing
Freemium
Best Arize Phoenix Alternatives in 2026
Arize Phoenix: AI observability and evaluation tool for developers. Here are 12 alternatives — compare pricing, free plans and API access side by side.
Arize Phoenix vs. alternatives
| Tool | Category | Pricing | Starting at | Free plan | API | Open source |
|---|---|---|---|---|---|---|
| AI Infrastructure | Free | — | |||
| AI Infrastructure | Freemium | $249/month | |||
 | AI Infrastructure | Freemium | $19/month | |||
 | AI Infrastructure | Free | — | |||
 | AI Infrastructure | Freemium | $199/month | |||
 | AI Infrastructure | Free | — | |||
 | AI Infrastructure | Freemium | $199/month | |||
 | AI Infrastructure | Paid | $299/month | |||
 | AI Infrastructure | Freemium | $9/month | |||
 | AI Infrastructure | Freemium | — | |||
 | AI Infrastructure | Freemium | $799/month | |||
| TraceLLM | AI Infrastructure | — | — | |||
 | AI Infrastructure | — | — |
Top Arize Phoenix alternatives
Opik
AI Infrastructure
End-to-end AI observability platform for developers with agent testing, optimization, and monitoring.
- AI Observability
- LLM Monitoring
- Agent Testing
Freemium
Portkey
AI Infrastructure
Productionize Gen AI across your org with AI gateway, observability, guardrails, and prompt management.
- AI Gateway
- LLM Orchestration
- Compliance Certifications
Free
Respan
AI Infrastructure
AI router with built-in observability and automated evaluations.
- LLM Observability
- Automated Evals
- Prompt Optimization
Freemium
AIWatch
AI Infrastructure
Monitors real-time status of 46 AI services for downtime and incidents.
Free
Keywords AI
AI Infrastructure
AI router with observability and automated evaluations
- LLM Engineering
- LLM Observability
- LLM Evals
Freemium
Latitude
AI Infrastructure
Open-source AI agent monitoring platform with full observability into production failures.
- Agent Monitoring
- Self-Healing
- Behavior Patterns
Paid
ClawMetry
AI Infrastructure
Monitor and govern AI agent activity, spend, and actions with ClawMetry.
- AI Agents
- Data Analysis
Freemium
OpenObserve
AI Infrastructure
High-performance, unified observability for the AI era with 140x lower storage cost.
Freemium
Traccia
AI Infrastructure
AI agent control plane for observability, evaluation, and governance
Freemium
TraceLLM
AI Infrastructure
Monitors and traces AI application performance with production data.
TensorZero
AI Infrastructure
Builds open-source tools for production-grade LLM applications