Best Lunary 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

DeepEval

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

#4 alternative

Ragas

Open-source evaluation toolkit for RAG and LLM applications.

#5 alternative

Traceloop

Open-source LLM observability built on OpenTelemetry

#6 alternative

Haystack

deepset's composable open-source framework for RAG and agent pipelines.

#7 alternative

Mastra

The TypeScript framework for building AI agents and workflows.

#8 alternative

Onyx

Open-source AI chat and enterprise search over your company's knowledge.

#9 alternative

Firecrawl

Turn websites into clean, LLM-ready data with a simple API.

#10 alternative

Ollama

Run open LLMs locally with a single command.

#11 alternative

Hugging Face

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

#12 alternative

GLM (Z.ai)

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