Best AI LLM Ops & Observability Tools of 2026

Weights & Biases

wandb.ai

#1

Weights & Biases is a widely used MLOps platform for experiment tracking, model management and evaluating AI applications.

liteLLM

litellm.ai

#2

Open-source AI gateway giving dev teams unified access, fallbacks and spend tracking across 100+ LLMs.

ApX Machine Learning

apxml.com

#3

Tools, model specs and courses for LLM engineers-VRAM calculator, benchmarks and model directory-with free and paid tiers.

portkey.ai

portkey.ai

#4

AI gateway and observability suite for governing and optimizing LLM apps; strong dev-tool traffic.

Arize AI

arize.com

#5

AI observability and evaluation platform to trace, evaluate and improve LLM agents in production, with an open-source Phoenix core.

Maxim AI

getmaxim.ai

#6

End-to-end evaluation and observability platform for building, testing, and monitoring AI agents and LLM apps.

Confident AI

confident-ai.com

#7

LLM evaluation and observability platform from DeepEval's makers for testing, tracing, red-teaming and governing AI applications.

Helicone

helicone.ai

#8

LLM observability platform and AI gateway that lets teams route, log, debug and analyze their model requests.

Latitude

latitude.so

#9

Open-source AI-agent observability platform for tracing sessions, clustering failures and running evals on live traffic.

Fiddler AI

fiddler.ai

#10

Enterprise AI observability and security platform to monitor, evaluate, and govern agentic and ML systems with guardrails.

Agenta

agenta.ai

#11

Open-source LLMOps platform uniting prompt management, evaluation and observability for teams shipping reliable LLM apps.

Higress

higress.ai

#12

Open-source AI-native API gateway for routing, protecting and caching LLM/agent traffic, with a paid managed cloud.

APIPark

apipark.com

#13

Open-source AI Gateway and Developer Portal for managing and deploying AI and API services.

honeyhive.ai

honeyhive.ai

#14

Observability and evaluation platform for production LLM agents, built on OpenTelemetry for tracing, monitoring and testing.

Openlayer

openlayer.com

#15

AI governance and observability platform with 100+ automated tests and real-time guardrails to evaluate and monitor ML/LLM systems.

LangWatch

langwatch.ai

#16

Platform to test, evaluate and observe LLM and voice AI agents, with prompt management and red-teaming for production.

metaflow.org

metaflow.org

#17

Open-source Python framework, born at Netflix, for building, scaling, and deploying real-world ML, AI, and data science workflows.

LLM Price Check

llmpricecheck.com

#18

Free comparison tool for LLM API prices across providers, with a calculator to estimate token costs.

Lilac

lilacml.com

#19

Open-source tool for data and AI practitioners to improve data quality for LLMs.

Openlit

openlit.io

#20

Open-source, OpenTelemetry-native platform for LLM observability, tracing, evaluation and prompt management.

USM Systems

usmsystems.com

#21

Enterprise AI consulting and custom development shop for large organizations integrating LLMs and predictive models into legacy systems.

Athina AI

athina.ai

#22

Collaborative platform to build, evaluate and monitor LLM apps, with 50+ evals, prompt management and production tracing.

dvc.ai

dvc.ai

#23

Open-source version control for data science and machine learning projects.

Roark

roark.ai

#24

Simulation testing and audio-native call scoring platform that catches voice-AI agent failures before and after launch.