Arize costs $35/mo.
These cost $0.
7 free alternatives to Arize, checked for license, recent activity and real adoption. Each one tells you the catch, so you can switch with your eyes open.
The top-rated free, open-source replacement for Arize is Langfuse (Open Source Open Source). Across this category, 5 self-hostable tools are available (including Langfuse and Arize Phoenix). Switching a 5-person team saves up to $2,100/year compared to Arize's $35/mo subscription.
The catch: Requires self-hosting setup, updates, and server maintenance compared to managed Arize.
Arize vs Free Alternatives
Quick side-by-side comparison · $0/mo vs $35/mo
| Alternative | Type | License | Where It Runs | Stars | Head-to-Head |
|---|---|---|---|---|---|
| Langfuse | open source | Open Source | Self-host | ★ 37.1k | Arize vs Langfuse → |
| Arize Phoenix | open source | Open Source | Self-host | ★ 12.2k | Arize vs Arize Phoenix → |
| OpenLLMetry | open source | Open Source | Local | ★ 7.5k | Arize vs OpenLLMetry → |
| LangWatch | open source | Open Source | Local | ★ 5k | Arize vs LangWatch → |
| Latitude | open source | Open Source | Self-host | ★ 4.7k | Arize vs Latitude → |
| Laminar | open source | Open Source | Self-host | ★ 3.5k | Arize vs Laminar → |
| OpenLIT | open source | Open Source | Self-host | ★ 3k | Arize vs OpenLIT → |
The picks
7 open source · ranked by fit
- 01
Langfuse
open sourceOpen SourceSelf-host37.1knov 2026Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications.
The catch vs ArizeRequires self-hosting setup, updates, and server maintenance compared to managed Arize.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/langfuse/langfuse or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-07
- 02
Arize Phoenix
open sourceOpen SourceSelf-host12.2knov 2026Open-source platform for LLM tracing, evaluation, and optimization. Features automatic instrumentation, prompt playground, and real-time AI application monitoring.
The catch vs ArizeRequires self-hosting setup, updates, and server maintenance compared to managed Arize.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- 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.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-07
- 03
OpenLLMetry
open sourceOpen SourceLocal7.5knov 2026Open-source observability platform for LLMs using OpenTelemetry. Monitor performance, track costs, and debug AI applications with just 2 lines of code.
The catch vs ArizeCommunity-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
- platforms
- desktopcross-platformone-click install
- install
- Clone https://github.com/traceloop/openllmetry or deploy with Docker Compose
- setup
- Download the native package or installer for your operating system.
- your data
- All application data lives locally on your own machine.
- checked
- 2026-11-07
- 04
LangWatch
open sourceOpen SourceLocal5knov 2026Tests AI agents through multi-turn simulations, LLM-based scoring, and production tracing so teams can ship reliable agents with confidence.
The catch vs ArizeCommunity-driven open source project without dedicated enterprise SLAs.
Install, platforms & data +
- platforms
- desktopcross-platformone-click install
- install
- Clone https://github.com/langwatch/langwatch or deploy with Docker Compose
- setup
- Download the native package or installer for your operating system.
- your data
- All application data lives locally on your own machine.
- checked
- 2026-11-07
- 05
Latitude
open sourceOpen SourceSelf-host4.7knov 2026Open-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 ArizeRequires self-hosting setup, updates, and server maintenance compared to managed Arize.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- 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.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-07
- 06
Laminar
open sourceOpen SourceSelf-host3.5knov 2026Laminar is an open-source platform that helps collect, understand, and utilize data for building high-quality LLM applications.
The catch vs ArizeRequires self-hosting setup, updates, and server maintenance compared to managed Arize.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/lmnr-ai/lmnr or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-07
- 07
OpenLIT
open sourceOpen SourceSelf-host3knov 2026Open-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 ArizeRequires self-hosting setup, updates, and server maintenance compared to managed Arize.
Install, platforms & data +
- platforms
- webself-hosteddocker to self-host
- install
- Clone https://github.com/openlit/openlit or deploy with Docker Compose
- setup
- Deploy via Docker or binary release from GitHub and configure environment variables.
- your data
- All application data and configuration live on your own server or local database.
- checked
- 2026-11-07
Arize Head-to-Head Comparisons (2027)
Side-by-side trade-off breakdowns · 7 free alternatives
Frequently Asked Questions
Direct answers · Arize open-source replacements
What is the best free alternative to Arize?+
The top free alternative to Arize is Langfuse (open source, Open Source). Langfuse provides tracing, evaluations, prompt management, and analytics to debug and improve LLM applications. Other popular Arize replacements include Arize Phoenix, OpenLLMetry, LangWatch.
Can I self-host a free replacement for Arize?+
Yes. Of the 7 free alternatives to Arize, 5 can be self-hosted on your own server or local machine: Langfuse (Open Source), Arize Phoenix (Open Source), Latitude (Open Source), Laminar (Open Source), OpenLIT (Open Source).
How much does switching from Arize to a free alternative save?+
Arize 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.
Should I vibe-code or build my own Arize clone from scratch?+
Our build verdict for Arize is NO (use a free alternative, save the tokens). Instead of paying recurring SaaS fees for Arize or rebuilding it from scratch, deploy one of the 7 battle-tested open-source alternatives like Langfuse.
What is the catch when switching from Arize to Langfuse?+
Requires self-hosting setup, updates, and server maintenance compared to managed Arize.
