Tag Helicone

Observability

Arize Phoenix vs Langfuse vs Helicone: Which to Self-Host in 2026?

Navy diagram of three self-host shapes for Phoenix single box, Langfuse stacked services, and Helicone gateway

Compare Arize Phoenix vs Langfuse vs Helicone for self-host in 2026: ELv2 vs MIT vs Apache-2.0, Docker footprints, OpenInference vs SDK vs proxy, cloud prices, and who should pick which.

AgentStack Observability Desk
October 13, 2026

Observability

8 Best Open Source LLM Observability Tools You Can Self-Host in 2026

Navy diagram of three self-host server racks sending amber traces into an open observability ring

Compare 8 open source LLM observability tools you can self-host in 2026, including Langfuse, Opik, Phoenix, Helicone, LangWatch, Agenta, Laminar, and OpenLIT, on license, OTel, Docker, and cost.

AgentStack Observability Desk
October 13, 2026

Tag Helicone

Arize Phoenix vs Langfuse vs Helicone: Which to Self-Host in 2026?

8 Best Open Source LLM Observability Tools You Can Self-Host in 2026

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