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NannyML

Freemium
mlopsmodel monitoringdata driftconcept driftmachine learningopen sourcepythonobservabilityai governancecomputer vision

NannyML is an open-source Python library and cloud platform for MLOps professionals to estimate post-deployment model performance and detect data drift and concept drift without needing access to targets.


NannyML provides a crucial solution for monitoring machine learning models after they have been deployed into production, addressing the problem of "silent model failure" where performance degrades over time. Primarily serving data scientists, ML engineers, and MLOps teams, its core value is its ability to estimate model performance without requiring ground truth labels, which are often delayed or unavailable. The platform uniquely offers both a powerful open-source Python library for code-based monitoring and a managed cloud solution for scalable, collaborative observability. This dual-offering approach caters to individual practitioners building custom workflows and larger organizations seeking robust, enterprise-grade ML monitoring. By focusing on performance estimation and drift, it helps teams proactively maintain model health and business value.

Pros

  • Open-source core library promotes transparency, customizability, and community support.
  • Specialized algorithms (CBPE) for estimating model performance without immediate access to ground truth.
  • Dual offering of a flexible Python library and a full-featured managed cloud platform.
  • Supports both tabular data and computer vision (image classification) use cases.
  • Comprehensive drift detection capabilities cover univariate, multivariate, and concept drift.
  • Excellent, detailed documentation with practical examples and tutorials.

Cons

  • Pricing for paid cloud tiers is not transparent ('Let's talk'), hindering self-service evaluation.
  • Core performance estimation features are primarily focused on classification models, with less support for regression.
  • The open-source version requires significant setup and infrastructure management for automated, production-grade monitoring.
  • As a specialized monitoring tool, it needs to be integrated into a broader MLOps stack for a complete E2E solution.

Key features

  • Performance Estimation (using CBPE algorithm)
  • Concept Drift Detection
  • Multivariate and Univariate Data Drift Detection
  • Support for Tabular & Image Classification Models
  • Open-Source Python Library
  • Managed Cloud Platform with UI & Alerting
  • Automatic Data Chunking
  • Interactive Dashboards

Integrations

PythonPandasMLflowAirflowKubeflowStreamlitPlotlyDockerDatabricksCloud Storage (S3, GCS, Azure Blob)

Target audience

Data Scientists, Machine Learning Engineers, and MLOps teams responsible for deploying, monitoring, and maintaining the performance of machine learning models in production environments.


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Founded

2020

Headquarters

Ghent, Belgium

Pricing Tiers

Open Source

The core Python library. Includes performance estimation (CBPE) and drift detection. Self-hosted and community-supported.

Free

Cloud Free

Managed cloud platform. Monitor up to 2 models, includes 1-day data retention, UI & dashboards, and email alerts.

Free

Cloud Pro

For growing teams. Monitor 3+ models, offers 30-day data retention, advanced alerting (Slack, Pagerduty), and priority support.

Let's talk

Cloud Enterprise

For large-scale deployments. Custom number of models, configurable data retention, user management with SSO, and a dedicated success manager.

Let's talk


Frequently Asked Questions


Top Alternatives to NannyML

Evidently AI

An open-source alternative often chosen for its comprehensive, pre-built visual reports and integrated data/model testing capabilities.

Arize AI

A broad, enterprise-grade MLOps observability platform that provides more extensive troubleshooting and root-cause analysis features beyond just drift detection.

Fiddler AI

A competitor focused on model governance and explainable AI (XAI), making it a strong choice for regulated industries needing deep model insights and bias detection.

WhyLabs

An observability platform known for its efficient data logging and profiling capabilities, with strong support for both ML models and unstructured data like in LLMs.

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