OpenLLMetry alternatives

3 tools to consider instead of OpenLLMetry, shown against it.

OpenLLMetry Langfuse Arize Phoenix Helicone
Vendor Traceloop Langfuse Arize AI Helicone
Pricing model Free tier + paid plans Free tier + paid plans Open source + paid options Free tier + paid plans
Free tier Yes Yes Yes Yes
Deployment Cloud, Self-hosted Cloud, Self-hosted Cloud, Self-hosted Cloud, Self-hosted
Open source Yes (Apache-2.0) Yes (MIT) Yes (Apache-2.0) Yes
Best for Teams that want vendor-neutral, OpenTelemetry-standard LLM instrumentation they can route to any compatible backend. Teams that want open-source tracing they can self-host for free and later scale onto a managed cloud plan. Developers who want a free, local, open-source tracing and eval library during development before committing to a hosted platform. Teams that want low-friction, proxy-based logging of LLM API traffic without instrumenting application code deeply.
Pricing

OpenLLMetry (the SDK) is free and open source with no usage limits; the optional Traceloop hosted dashboard has a free tier metered by monthly spans, plus a custom-priced Enterprise plan.

OpenLLMetry SDK Free
Traceloop Free Forever $0/month
Traceloop Enterprise Custom

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Free to self-host indefinitely; Langfuse Cloud has a free Hobby tier plus Core, Pro, and Enterprise monthly plans metered by observability units, with graduated per-unit overage pricing.

Hobby (Cloud) $0/month
Core (Cloud) $29/month
Pro (Cloud) $199/month
Enterprise (Cloud) $2,499/month

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Phoenix itself is free, open-source, and local-first with no hosted fees; Arize AX, the company's separate commercial production-monitoring platform, has its own free, Pro, and Enterprise plans metered by trace spans and data ingestion.

Phoenix (open source) Free
Arize AX Free $0
Arize AX Pro $50/month
Arize AX Enterprise Custom

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Free Hobby tier for a limited number of monthly requests; paid Pro and Team monthly plans add unlimited seats, longer retention, and compliance, with usage-based overage beyond the included request volume; Enterprise is custom with on-prem deployment.

Hobby $0/month
Pro $79/month
Team $799/month
Enterprise Custom

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Features
  • OpenTelemetry-native tracing for LLM calls and chains
  • Vendor-neutral: works with 25+ observability backends
  • Token usage, latency, and cost capture
  • Optional hosted Traceloop dashboard with evaluation and prompt management
  • CI/CD integration for prompt experiments
  • On-premises deployment across major clouds (Traceloop Enterprise)
  • Distributed tracing for LLM calls, chains, and agent steps
  • Prompt management with versioning
  • Dataset-based evaluation with human, custom, or LLM-as-judge scoring
  • Production monitoring dashboards and cost tracking
  • Free, unlimited self-hosting via Docker Compose or Kubernetes
  • SDKs and OpenTelemetry-compatible instrumentation
  • OpenTelemetry-based tracing for LLM and agent applications
  • Built-in LLM-as-judge and heuristic evaluators
  • Local-first, notebook-friendly workflow
  • Prompt iteration and comparison tools
  • Dataset-based experiments
  • Optional upgrade path to Arize AX for hosted production monitoring
  • Proxy or async-SDK based request logging
  • Custom query language (HQL) over logged requests
  • Cost and latency analytics across models and providers
  • Alerting and usage reports
  • Open-source, self-hostable core platform
  • SOC 2 & HIPAA compliance on higher tiers

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