Best Langtrace Alternatives in 2026

#1 alternative

Arize Phoenix

Open-source LLM and agent observability built on OpenTelemetry.

#2 alternative

Opik

Open-source LLM evaluation, tracing, and observability by Comet.

#3 alternative

Traceloop

Open-source LLM observability built on OpenTelemetry

#4 alternative

DeepEval

Open-source LLM evaluation framework with pytest-style testing.

#5 alternative

Ragas

Open-source evaluation toolkit for RAG and LLM applications.

#6 alternative

Ollama

Run open LLMs locally with a single command.

#7 alternative

Hugging Face

The open hub for machine learning models, datasets, and demos.

#8 alternative

GLM (Z.ai)

Open-weight frontier LLM family from Z.ai (Zhipu AI), tuned for coding and agents.

#9 alternative

Qwen

Alibaba's free AI assistant, backed by the open-weight Qwen model family

#10 alternative

Vocode

Open-source framework for building voice AI agents

#11 alternative

Airbyte

Open-source data integration with 600+ connectors

#12 alternative

Baserow

Open-source no-code database and Airtable alternative