18.7
W&B Weave provides observability and continuous improvement tools for production AI agents.
Free planOpen sourceiOSWebAPI
Best Model Monitoring Software in 2026
Model monitoring software is for keeping watch on model behavior, data quality and performance. Compared on drift detection, bias monitoring, data quality monitoring and performance monitoring, the entries also specify deployment options and monitored model limits. These details help you consider operational fit alongside the signals you need to track. Free-plan availability and paid-from pricing provide cost…
28.4
Opik helps teams building applications or agents that call an LLM log actions and evaluate behavior through development, testing, and production.
Free planOpen sourceWebAPILinux
38.3
Evidently AI evaluates, tests, and monitors machine-learning models, LLMs, RAG applications, and AI agents.
Free planOpen sourceWebAPILinux
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Langfuse
Langfuse is an open-source AI engineering platform for teams debugging, analyzing, and iterating on AI agent applications.
Free planOpen sourceWebAPILinuxSelf-hosted8.2From $29 a month - 5
LangWatch
LangWatch is an AI agent engineering platform for teams preparing agents for production.
Free planOpen sourceWebAPILinuxmacOS8.2From €29 a month - 6
Deepchecks
Deepchecks LLM Evaluation is a platform for testing, observability, and monitoring of AI systems in production.
Free planOpen sourceWebAPILinuxmacOS8.1Free plan - 7
LangSmith
LangSmith is a platform for building, evaluating, deploying, monitoring, and improving AI agents.
Free planWebAPILinuxmacOS8.0$39 usage-based - 8
NannyML
NannyML monitors deployed machine-learning models and estimates their performance when ground-truth labels are delayed or unavailable.
Free planOpen sourceWebAPILinuxSelf-hosted7.9From $99 a month - 9
SUPERWISE
SUPERWISE AMP is an AI governance control plane between AI applications and models.
Free planWebAPIExtensionLinux7.8From $9 a month - 10
Braintrust
Braintrust is an observability platform for teams improving AI agents that run in production.
Free planWebAPISelf-hosted7.7From $249 a month - 11
OpenLIT
OpenLIT is an open-source Agent Harness Engineering platform for LLM tracing, evaluations, prompt management and cost tracking, built on OpenTelemetry.
Free planOpen sourceWebAPILinuxmacOS7.7Free plan - 12
Lunary
Lunary is an AI platform for enterprises and developers building chatbots or other applications powered by large language models.
Open sourceWebAPISelf-hosted7.1From $20 a month - 13
Maxim AI
Maxim AI is an evaluation and observability platform for simulating, assessing, and monitoring AI agents.
Free planWebAPISelf-hosted7.0From $29 a month - 14
Galileo
Galileo is an observability, evaluation, and guardrail platform for generative AI and agentic applications.
Free planWebAPISelf-hosted6.9From $100 a month - 15
Helicone
Helicone is a platform for routing, debugging, and analyzing AI applications.
Free planWebAPISelf-hosted6.9From $79 a month - 16
Arize AX
Arize AX is a platform for improving AI agents by turning production behavior into issues, investigations, evaluations, and experiments.
Free planWebAPISelf-hosted6.8From $50 a month - 17
Laminar
Laminar is an open-source observability and debugging platform for AI agents, designed around OpenTelemetry.
Free planWebAPISelf-hosted6.8From $30 a month - 18
Arthur
Arthur is a platform for finding AI agents across enterprise environments and providing a shared way to observe and govern them.
Free planWebAPISelf-hosted6.7From $60 a month - 19
Qualdo-MQX
Qualdo-MQX monitors machine-learning models after deployment, helping teams track performance, model errors, and data quality issues.
Free planWebAPISelf-hosted6.6From $79 a month - 20
Memoturn
Memoturn is an open-source platform for tracing and managing large language model applications.
Free planWebAPILinuxSelf-hosted6.5Free plan - 21
Fiddler AI
Free planWebAPISelf-hosted6.4Free plan - 22
HoneyHive
HoneyHive is an agent observability platform for teams that want to observe, evaluate, and improve AI agents in production.
Free planWebAPISelf-hosted6.4Free plan - 23
Arize Phoenix
Arize Phoenix helps teams trace, evaluate, debug, and improve AI applications.
Free planWebAPISelf-hosted6.3Free plan - 24
Pulsar
Pulsar monitors machine learning models in production, focusing on model drift, concept drift, and performance.
APISelf-hosted5.6