Best AI LLM Ops & Observability Tools of 2026

Respan

keywordsai.co

#25

LLM engineering platform that routes calls through one gateway to 500+ models and adds tracing, evaluations and spend monitoring.

WhyLabs AI Observatory

whylabs.ai

#26

AI observability platform for monitoring machine learning models and ensuring AI application security.

Omnifact

omnifact.ai

#27

GDPR-compliant generative-AI workspace that masks sensitive data and lets regulated firms use top LLMs under IT control.

thisorthis.ai

thisorthis.ai

#28

AI model comparison platform for testing prompts and analyzing AI responses.

Modly

modly.ai

#29

Done-for-you service that trains, fine-tunes, and hosts a private LLM on a company's own data.

Monitaur

monitaur.ai

#30

Enterprise AI governance platform for regulated industries to manage model risk, bias and compliance across the model lifecycle.

AI Spend

aispend.io

#31

OpenAI API cost-tracking dashboard, now non-functional after OpenAI removed the usage endpoints it relied on.

AiPrice

aiprice.dev

#32

API that counts tokens and estimates OpenAI prompt costs before you send requests, with a free tier.

Anomify

anomify.ai

#33

ML anomaly-detection and monitoring platform for critical infrastructure that cuts false alerts.

Tokenomy.ai

tokenomy.ai

#34

AI token calculator and cost estimator for LLMs.

UsageGuard

usageguard.com

#35

Enterprise AI gateway unifying multiple LLM providers with observability, security controls, and cost-tracking for production AI apps.

EvalsOne

evalsone.com

#36

A platform for evaluating and optimizing generative AI applications.

Cotter AI

cotter.ai

#37

AI governance layer that monitors agents and workflows to prevent breakdowns and keep enterprise systems aligned.

P402.io

p402.io

#38

Usage-based infrastructure that meters and attributes every AI request by owner, cost and policy, with optional model routing.

Mood Metrics API

mood-metrics-api.dev

#39

Mood Metrics API is a real-time sentiment analysis service with positive/negative/neutral classification, confidence scores, and primary emotion breakdown.

Promptr

promptr.dev

#40

API that compresses LLM prompts to cut input token costs by roughly 30-40% while preserving output quality.

Lexi

lexisaas.com

#41

Proxy that sits between your code and LLMs, restructuring context to cut tokens and cost while preserving results.

Ottic

ottic.ai

#42

Platform to evaluate and test LLM-powered applications for faster and reliable product releases.

VisibilityRadar

#43

VisibilityRadar scores brand visibility across 6 AI models and recommends strategies customized to each model's training data sources.

Stigg

#44

Stigg describes itself as a usage runtime for AI products, but the provided website excerpt contains only cookie consent and analytics tracking details with no substantive product information.

Token Counter

tokencounter.co

#45

Counts tokens and estimates costs for AI model usage.

ProofWrite AI

#46

ProofWrite AI rewrites AI-generated text to sound more natural and verifies quality against common AI detectors like ZeroGPT and Winston AI.

api-usage

apiusage.info

#47

Open-source tool to track and analyze OpenAI API usage and costs.

hila

hila.ai

#48

Enterprise GenAI platform focused on anti-hallucination analytics over structured data, with built-in LLMOps.