Open-source alternatives guide · Updated 2026

Best open-source alternatives to Galileo

Compare the best free and open-source alternatives to Galileo — 4 verified projects with explicit catalog relationships. Inspect licenses, GitHub activity, self-hosting signals, and migration fit before you switch.

4verified alternatives
2self-hosted signals
1category

Only explicit alternative relationships are shown—never inferred competitor claims.

Overview

This guide compares 4 verified open-source alternatives to Galileo, including Langfuse, Arize Phoenix, Latitude, and OpenLIT.

Projects appear mainly in AI & Machine Learning. 2 options include a self-hosting signal — see the self-hosted catalog. Ranking follows public GitHub stars and recorded momentum—not vendor marketing. Compare projects side by side, then confirm license fit, migration effort, and operational ownership before adopting any option.

Strongest repository-activity signal: Langfuse · Jump to ranking · 31.2K stars · self-hostable

About Galileo

Proprietary product with documented open-source alternatives cataloged on OpenSourceChoice. Compare licenses, repository activity, and self-hosting options befo

Ranked open-source alternatives to Galileo

Compare capabilities, licensing, and ownership model. Stars help with discovery; they are not a security or product-fit guarantee.

Langfuse

Open-source alternative to Galileo

AI & Machine LearningLicense not declaredSelf-hostedAI-native

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, a

Best for: AI product teams
Deployment: Self-hostable
License: License not declared
Activity: Updated 26 hours ago

Key capabilities

self-hosted

open-source

llm

analytics

Arize Phoenix

Open-source alternative to Galileo

AI & Machine LearningLicense not declaredAI-native

AI Observability & Evaluation

AI Observability & Evaluation Review the official repository, license, release activity, and deployment documentation before production adoption.

Best for: AI product teams
Deployment: Inspectable source
License: License not declared
Activity: Updated 26 hours ago

Key capabilities

openai agents

anthropic

langchain

Latitude

Open-source alternative to Galileo

AI & Machine LearningMITSelf-hostedAI-native

Latitude is the open-source ai monitoring platform.

Latitude is the open-source ai monitoring platform. Review the official repository, license, release activity, and deployment documentation before production adoption.

Best for: AI product teams
Deployment: Self-hostable
License: MIT
Activity: Updated 27 hours ago

Key capabilities

OpenLIT

Open-source alternative to Galileo

AI & Machine LearningApache-2.0AI-native

Open source platform for AI Engineering: OpenTelemetry-native LLM Observability, GPU Monitoring, Guardrails, Evaluations, Prompt Management, Vault, Playground. 🚀💻 Integrates with 50+ LLM Providers, VectorDBs, Agent Fra

Open source platform for AI Engineering: OpenTelemetry-native LLM Observability, GPU Monitoring, Guardrails, Evaluations, Prompt Management, Vault, Playground. 🚀💻 Integrates with

Best for: AI product teams
Deployment: Inspectable source
License: Apache-2.0
Activity: Updated 27 hours ago

Key capabilities

How to choose a Galileo alternative

Map must-have capabilitiesList the workflows in Galileo you cannot drop during migration.

Verify the licenseConfirm it fits your use, distribution, and compliance model. Browse license briefs.

Run a proof of conceptTest real data, integrations, clients, and failure modes. Use Compare for side-by-side checks.

Plan ownershipAssess upgrades, backups, support, and an exit path. Read when self-hosting is worth it.

Frequently asked questions about Galileo alternatives

What are the best open-source alternatives to Galileo?

OpenSourceChoice currently lists 4 projects with an explicit alternative relationship to Galileo. Catalog highlights include Langfuse, Arize Phoenix, and Latitude. Rankings follow public GitHub stars and recorded momentum—not paid placement. Match capabilities and license fit to your workflow before adopting any option.

Are open-source alternatives to Galileo free?

Most catalogued alternatives publish source under OSI or source-available licenses and are free to inspect. Hosting, commercial support, or cloud model APIs may still cost money. Always read the project license for your use case.

Can I self-host an alternative to Galileo?

2 options in this list carry a self-hosting signal. Confirm the official install guide, backups, upgrades, and hardening steps before production.

How should I evaluate Galileo alternatives?

Map must-have Galileo workflows, verify license and compliance fit, run a proof of concept with real data and integrations, then plan ownership for upgrades, backups, support, and an exit path.