Telemetry.dev VS Arize Phoenix

Which is more popular?

LLM Observability popularity: 40% vs 60%
alternatives listed: 3 vs 15

Base details

Website, pricing, platforms and company facts side by side.

	Telemetry.dev	Arize Phoenix
Website	telemetry.dev	arize.com
Pricing	Open source Official pricing	Open source Free
Listed in	AI Agent Observability LLM Observability Developer Tools Monitoring Tools Observability AI +3	AI Agent Observability LLM Observability AI Agent Evaluation Monitoring Tools Open Source Inference AI +4

About Telemetry.dev and Arize Phoenix

In their own words, as submitted to SaaSHub.

Telemetry.dev

Arize Phoenix

No description of Telemetry.dev yet.

Arize Phoenix is the open-source AI observability and evaluation platform from Arize AI, built for developers who want to trace, evaluate, troubleshoot, and improve AI applications and agents in their own environment. Phoenix supports tracing, evaluations, datasets, experiments, prompt...

Features and specs

What each product offers, as listed by its team.

Telemetry.dev 3 features

Arize Phoenix 5 features

Likely focus on developer telemetry
I could not browse the site or verify its current features. Judging by the name and domain, it is probably aimed at developers who want to collect and view telemetry data such as usage, performance, or events. If so, it would suit teams that want insight into how their software behaves in production. Check the site to confirm.
Potential for fast setup
Developer-focused telemetry tools usually offer SDKs or simple integrations that take little time to set up. I can't confirm that Telemetry.dev does. Check its documentation and quickstart guides.
Centralized visibility
Tools in this category typically gather metrics, events, or logs in one place, which can speed up debugging and decision-making. Verify which data types Telemetry.dev supports.

Open source and free to self-host
Phoenix is open source (Elastic License 2.0) and can be run locally, in a notebook, in Docker, or on Kubernetes at no licensing cost. This gives teams full control over their data and avoids vendor lock-in, which is useful for experimentation and privacy-sensitive workloads.
Built on OpenTelemetry and OpenInference
Tracing is based on OpenTelemetry standards and the OpenInference instrumentation conventions. This makes it vendor- and framework-agnostic, with auto-instrumentation for LangChain, LlamaIndex, OpenAI, Anthropic, Bedrock, DSPy and others, and lets traces be exported to other OTel-compatible backends.
Comprehensive LLM observability and evaluation
It combines tracing, LLM-based and code-based evaluations, datasets, experiments, prompt management and a playground in one tool. Teams can inspect spans, debug retrieval and agent workflows, run evals on traces, and compare experiments as they iterate on applications.
Easy local setup and notebook-friendly
Phoenix can be launched with a simple pip install and a few lines of code, running locally or in Jupyter/Colab. This shortens the path from prototype to visibility into how an LLM app behaves, without requiring account creation or heavy infrastructure.
Clear upgrade path to Arize AX
Because Phoenix shares concepts and instrumentation with Arize's commercial AX platform, teams can begin with the free tool and later move to a managed, enterprise-grade offering with more scale, monitoring and support without re-instrumenting their code.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100

Telemetry.dev

Arize Phoenix

40% 40%

LLM Observability

60% 60%

0% 0%

AI Agent Observability

100% 100%

37% 37%

Monitoring Tools

63% 63%

39% 39%

Developer Tools

61% 61%

User comments

Share your experience with using Telemetry.dev and Arize Phoenix. For example, how are they different and which one is better?

Alternatives to Telemetry.dev and Arize Phoenix

When comparing Telemetry.dev and Arize Phoenix, you can also consider the following products.

Langfuse
Langfuse is an open-source LLM engineering platform that helps teams collaboratively debug, analyze, and iterate on their LLM applications.

Compare Langfuse to Telemetry.dev or Arize Phoenix:

Langfuse vs Telemetry.dev Langfuse vs Arize Phoenix
LangSmith
Build and deploy LLM applications with confidence

Compare LangSmith to Telemetry.dev or Arize Phoenix:

LangSmith vs Telemetry.dev LangSmith vs Arize Phoenix

Compare Telemetry.dev VS Arize Phoenix and see what are their differences