# 8 Best Open Source Alternatives for Galileo

Canonical: https://caniforkit.com/galileo
Last updated: 2026-11-07

Looking for the best open source alternative for Galileo? Compare 8 verified free and open source alternatives to Galileo (Langfuse, Arize Phoenix, OpenLLMetry) with license details, self-hosting requirements, and practical trade-offs.

## Galileo Overview & Subscription Cost
- **Product**: Galileo
- **Category**: [analytics](https://caniforkit.com/category/analytics)
- **Paid Subscription Price**: $35/month per seat
- **1-Seat Annualized Cost**: $420/year
- **5-Person Team Annualized Cost**: $2,100/year
- **10-Person Team Annualized Cost**: $4,200/year
- **Can I Vibe-Code / Rebuild It Myself?**: NO (use a free alternative, save the tokens)
- **Rebuild Verdict**: Instead of paying recurring SaaS fees for Galileo or rebuilding it from scratch, deploy one of the 8 battle-tested open-source alternatives like Langfuse.

## Verified Free & Open Source Alternatives

| Alternative | Type | License | Runs On | GitHub Stars | Head-to-Head |
| --- | --- | --- | --- | --- | --- |
| [Langfuse](https://caniforkit.com/fork/langfuse) | Open Source | Open Source | Self-host | ★ 37.1k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-langfuse) |
| [Arize Phoenix](https://caniforkit.com/fork/arize-phoenix) | Open Source | Open Source | Self-host | ★ 12.2k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-arize-phoenix) |
| [OpenLLMetry](https://caniforkit.com/fork/openllmetry) | Open Source | Open Source | Local | ★ 7.5k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-openllmetry) |
| [Helicone](https://caniforkit.com/fork/helicone) | Open Source | Open Source | Local | ★ 6.3k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-helicone) |
| [LangWatch](https://caniforkit.com/fork/langwatch) | Open Source | Open Source | Local | ★ 5k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-langwatch) |
| [Latitude](https://caniforkit.com/fork/latitude) | Open Source | Open Source | Self-host | ★ 4.7k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-latitude) |
| [OpenLIT](https://caniforkit.com/fork/openlit) | Open Source | Open Source | Self-host | ★ 3k | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-openlit) |
| [Spanlens](https://caniforkit.com/fork/spanlens) | Open Source | Open Source | Self-host | ★ 13 | [Compare vs Galileo](https://caniforkit.com/vs/galileo-vs-spanlens) |

## In-Depth Alternative Profiles

### Langfuse
- **Fork Page**: [Langfuse Profile](https://caniforkit.com/fork/langfuse)
- **Head-to-Head Comparison**: [Galileo vs Langfuse](https://caniforkit.com/vs/galileo-vs-langfuse)
- **Official Website**: https://langfuse.com/
- **Source Code Repository**: https://github.com/langfuse/langfuse
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 37.1k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
- **The Catch vs Galileo**: Requires self-hosting setup, updates, and server maintenance compared to managed Galileo.
- **Installation**: Clone https://github.com/langfuse/langfuse or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

### Arize Phoenix
- **Fork Page**: [Arize Phoenix Profile](https://caniforkit.com/fork/arize-phoenix)
- **Head-to-Head Comparison**: [Galileo vs Arize Phoenix](https://caniforkit.com/vs/galileo-vs-arize-phoenix)
- **Official Website**: https://arize.com/phoenix/
- **Source Code Repository**: https://github.com/arize-ai/phoenix
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 12.2k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Open-source platform for LLM tracing, evaluation, and optimization. Features automatic instrumentation, prompt playground, and real-time AI application monitoring.
- **The Catch vs Galileo**: Requires self-hosting setup, updates, and server maintenance compared to managed Galileo.
- **Installation**: Clone https://github.com/arize-ai/phoenix or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

### OpenLLMetry
- **Fork Page**: [OpenLLMetry Profile](https://caniforkit.com/fork/openllmetry)
- **Head-to-Head Comparison**: [Galileo vs OpenLLMetry](https://caniforkit.com/vs/galileo-vs-openllmetry)
- **Official Website**: https://www.traceloop.com/openllmetry
- **Source Code Repository**: https://github.com/traceloop/openllmetry
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 7.5k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.
- **The Catch vs Galileo**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/traceloop/openllmetry or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### Helicone
- **Fork Page**: [Helicone Profile](https://caniforkit.com/fork/helicone)
- **Head-to-Head Comparison**: [Galileo vs Helicone](https://caniforkit.com/vs/galileo-vs-helicone)
- **Official Website**: https://helicone.ai
- **Source Code Repository**: https://github.com/helicone/helicone
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 6.3k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Open-source platform for logging, monitoring, and debugging LLM applications. Route, debug, and analyze AI apps with comprehensive observability tools.
- **The Catch vs Galileo**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/helicone/helicone or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### LangWatch
- **Fork Page**: [LangWatch Profile](https://caniforkit.com/fork/langwatch)
- **Head-to-Head Comparison**: [Galileo vs LangWatch](https://caniforkit.com/vs/galileo-vs-langwatch)
- **Official Website**: https://langwatch.ai/
- **Source Code Repository**: https://github.com/langwatch/langwatch
- **License**: Open Source
- **Runs On**: Local
- **GitHub Stars**: 5k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: desktop, cross-platform, one-click install
- **Summary**: Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.
- **The Catch vs Galileo**: Community-driven open source project without dedicated enterprise SLAs.
- **Installation**: Clone https://github.com/langwatch/langwatch or deploy with Docker Compose
- **Setup**: Download the native package or installer for your operating system.
- **Data Storage**: All application data lives locally on your own machine.

### Latitude
- **Fork Page**: [Latitude Profile](https://caniforkit.com/fork/latitude)
- **Head-to-Head Comparison**: [Galileo vs Latitude](https://caniforkit.com/vs/galileo-vs-latitude)
- **Official Website**: https://latitude.so/
- **Source Code Repository**: https://github.com/latitude-dev/latitude-llm
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 4.7k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Open-source platform for monitoring AI agents: captures traces, surfaces failure patterns, alerts on issues, and helps you verify fixes with automated evals.
- **The Catch vs Galileo**: Requires self-hosting setup, updates, and server maintenance compared to managed Galileo.
- **Installation**: Clone https://github.com/latitude-dev/latitude-llm or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

### OpenLIT
- **Fork Page**: [OpenLIT Profile](https://caniforkit.com/fork/openlit)
- **Head-to-Head Comparison**: [Galileo vs OpenLIT](https://caniforkit.com/vs/galileo-vs-openlit)
- **Official Website**: https://openlit.io/
- **Source Code Repository**: https://github.com/openlit/openlit
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 3k
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Open-source observability platform for GenAI and LLM applications. Real-time monitoring, distributed tracing, prompt management, and AI model evaluation built on OpenTelemetry.
- **The Catch vs Galileo**: Requires self-hosting setup, updates, and server maintenance compared to managed Galileo.
- **Installation**: Clone https://github.com/openlit/openlit or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

### Spanlens
- **Fork Page**: [Spanlens Profile](https://caniforkit.com/fork/spanlens)
- **Head-to-Head Comparison**: [Galileo vs Spanlens](https://caniforkit.com/vs/galileo-vs-spanlens)
- **Official Website**: https://www.spanlens.io/
- **Source Code Repository**: https://github.com/spanlens/Spanlens
- **License**: Open Source
- **Runs On**: Self-host
- **GitHub Stars**: 13
- **Maintenance Activity**: nov 2026
- **Supported Platforms**: web, self-hosted, docker to self-host
- **Summary**: Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.
- **The Catch vs Galileo**: Requires self-hosting setup, updates, and server maintenance compared to managed Galileo.
- **Installation**: Clone https://github.com/spanlens/Spanlens or deploy with Docker Compose
- **Setup**: Deploy via Docker or binary release from GitHub and configure environment variables.
- **Data Storage**: All application data and configuration live on your own server or local database.

## Frequently Asked Questions

### What is the best free alternative to Galileo?
The top free alternative to Galileo is Langfuse (open source, Open Source). Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications. Other popular Galileo replacements include Arize Phoenix, OpenLLMetry, Helicone.

### How much does switching from Galileo to a free alternative save?
Galileo starts at $35/month per seat ($420/year). Switching a 5-person team to a free alternative like Langfuse saves $2,100 per year in software subscription fees.

### What is the catch when switching away from Galileo?
While Langfuse replaces core Galileo features without subscription fees, the real-world trade-off is: Requires self-hosting setup, updates, and server maintenance compared to managed Galileo.

## Related

- [analytics Software Category Hub](https://caniforkit.com/category/analytics)
- [All Paid SaaS Alternatives Index](https://caniforkit.com/alternatives)
- [Self-Hosted Software Directory](https://caniforkit.com/self-hosted)
- [Homepage](https://caniforkit.com)