WhyLabs is the essential AI Observability Platform for model and data health. It is the only machine learning monitoring and observability platform that doesn't operate on raw data, which enables a no-configuration solution, privacy preservation, and massive scale.
Machine learning engineers and data scientists rely on the platform to monitor ML applications and data pipelines by surfacing and resolving data quality issues, data bias, and concept drift. These capabilities help AI builders reduce model failures, avoid downtime, and ensure customers are getting the best user experience. With out-of-the-box anomaly detection and purpose-built visualizations, WhyLabs eliminates the need for manual troubleshooting and reduces operational costs.
The platform can monitor tabular, image, and text data. It integrates with many popular ML and data tools including Pandas, Apache Spark, AWS Sagemaker, MLflow, Flask, Ray, RAPIDS, Apache Kafka, and more. To learn more about what data types WhyLabs can work with and which tools we integrate with, check out the whylogs GitHub page: https://github.com/whylabs/whylogs
WhyLabs was created at the Allen Institute for Artificial Intelligence (AI2) by Amazon Machine Learning alums and is backed by Andrew Ng's AI Fund.
For custom pricing, EULA, or a private contract, please contact AWSMarketplace@whylabs.ai for a private offer.
Highlights
Enable data and model monitoring quickly and securely: Automated monitoring and alerting across dozens of "data vitals" with out-of-the-box configurations and lightweight integrations. Cloud agnostic, built with AWS-grade privacy and security. Integration takes less than an hour.
Deliver the impact models were designed for: Improve model performance, resilience, and auditability with alerting and reporting tools. Monitor model inputs, outputs, performance as well as upstream data quality in one platform.
Achieve AI Governance across the organization: Track all relevant metrics associated with the data that flows through Al applications. Enabling observability in Al applications is key for achieving Al Governance best practices.
AWS Marketplace now accepts line of credit payments through the PNC Vendor Finance program. This program is available to select AWS customers in the US, excluding NV, NC, ND, TN, & VT.
Pricing is based on the duration and terms of your contract with the vendor. This entitles you to a specified quantity of use for the contract duration. If you choose not to renew or replace your contract before it ends, access to these entitlements will expire.
Additional AWS infrastructure costs may apply. Use the AWS Pricing Calculator to estimate your infrastructure costs.
This platform prices by the number of machine learning models you monitor. You start with the 1 Model free tier, which covers one model at no cost. From there, the 2 Models, 3 Models, 4 Models, and 5 Models options step up coverage by one model each, so you pay for the count you need. The WhyLabs Enterprise option supports model monitoring at scale for teams beyond five models. All options bill as a contract. Pick the tier that matches how many models you run in production.
Top-of-mind questions for buyers
What counts as one model for billing purposes?
A model is a machine learning model or data pipeline you monitor in production. Each predictive ML model, dataset, or generative AI application you track counts as one model. The platform ingests statistical summaries from your data, so each monitored model or pipeline uses one of your paid model slots.
What happens if I need to monitor more models than my current tier allows?
You move to the tier that matches your model count. The 2, 3, 4, and 5 Models options each add one model of coverage. If you run more than five models, the WhyLabs Enterprise option supports monitoring at scale. Choose the tier that fits your production model count.
Does the number of models cover both predictive ML and generative AI monitoring?
Yes. Each model slot can cover predictive ML models, data pipelines, or generative AI applications like large language models. The platform monitors data quality, drift, and model performance for ML, and it monitors issues like toxicity, prompt injections, and data leakage for LLMs.
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Automated monitoring and alerting across data vitals with out-of-the-box anomaly detection and configurations for identifying data quality issues.
Multi-Modal Data Support
Capability to monitor tabular, image, and text data types across machine learning applications and data pipelines.
Privacy-Preserving Architecture
Platform operates on processed data summaries rather than raw data, enabling privacy preservation and no-configuration deployment at scale.
Comprehensive ML Observability
Unified monitoring of model inputs, outputs, performance metrics, data drift, concept drift, and upstream data quality issues in a single platform.
Broad Integration Ecosystem
Integration with popular ML and data tools including Pandas, Apache Spark, AWS SageMaker, MLflow, Flask, Ray, RAPIDS, and Apache Kafka.
Multi-Model Type Support
Monitoring and observability capabilities for tabular, deep learning, computer vision, natural language processing, and large language model deployments
Performance and Drift Detection
Identification and mitigation of model performance degradation, data drift, data integrity issues, hallucination, accuracy, safety, and security problems
Root Cause Analysis and Diagnostics
Advanced analytics using 3D UMAP for macro-level trend and outlier analysis, with micro-level root cause analysis and diagnostic capabilities for model issues
Security and Access Control
SOC2 Type 2 security compliance certification and role-based access control (RBAC) for enterprise-level permission management across protected environments
Custom Metrics and Dashboards
Customizable dashboards and reports with support for custom metrics to track model performance aligned with business KPIs
Agent and Application Observability
Full visibility into AI agent behavior through tree-structured traces capturing user inputs, routing logic, tool calls, memory access, and model outputs with native support for Amazon Bedrock Agents and open frameworks.
Prompt Optimization and Testing
Prompt IDE environment for designing, testing, and comparing prompt versions side by side with live inputs, outputs, and integrated evaluation results to measure quality and performance.
LLM and Agent Evaluation
Offline and online LLM-as-a-Judge evaluations to assess accuracy, tool-calling, planning, and goal achievement with continuous evaluation against production traffic.
Governance and Audit Controls
Span-level audit trail capturing every agent action including reasoning steps, tool calls, retrieval results, model inputs and outputs, with role-based access control, SSO, custom roles, and compliance certifications including SOC 2 Type II, ISO/IEC 27001, HIPAA, and GDPR.
Real-Time Monitoring and Alerting
Custom metrics definition and monitoring of latency, token usage, and failures with configurable alerts and anomaly detection capabilities for production issue prevention.
Proactive monitoring has improved model reliability and supports faster data-driven decisions
Reviewed on Oct 28, 2026
Review from a verified AWS customer
What is our primary use case?
My main use case for WhyLabs is rooted in my experience with the platform, which has been very enlightening and helpful because it offers intuitive insights into AI model behavior and enhances my understanding of AI observability. The best part about the interface is that it is very user-friendly and intuitive, and also features a comprehensive suite of analytics that provides valuable insights into AI model behavior while enabling a dashboard for data monitoring, model, and model features. It also facilitates real-time monitoring, ultimately enhancing the efficiency of AI development processes. Additionally, it gives us the leverage to customize model features as per project requirements.
One specific example where WhyLabs made a difference for my team is when monitoring AI model performance and data quality using its dashboards. The analytics helped identify issues in data patterns and potential model drift early, allowing the team to investigate issues, improve reliability, and make more informed decisions. This proactive visibility reduced troubleshooting effort and helped maintain confidence in our AI system.
Regarding my main use case with WhyLabs, it stands out for its ability to provide clear visibility into AI model behavior and data quality. I also love its monitoring dashboards, which help us identify potential issues early, simplify troubleshooting, and support proactive decision-making. This has made our day-to-day AI operations more efficient, reliable, and easier to manage.
How has it helped my organization?
WhyLabs has positively impacted our organization by improving visibility into AI model performance and data quality. Its monitoring and anomaly detection capabilities help us identify potential issues earlier, reduce troubleshooting effort, and support more reliable AI operations. This has improved team efficiency and decision-making in my organization.
WhyLabs has helped improve visibility into data quality and AI model behavior, allowing my team to identify potential issues early and investigate them more efficiently. This has reduced manual monitoring effort and supported more reliable model operations. Although we have not formally measured exact savings or percentage improvement, the main benefit has been more proactive issue detection and better informed decisions.
What is most valuable?
The best features that WhyLabs offers, which I mainly rely on and appreciate greatly, are the AI model monitoring, data quality analysis, anomaly detection, and the customizable dashboards.
These features are especially valuable because they help us identify issues in data patterns, detect potential model performance issues early, and provide clear insight for troubleshooting. They also improve visibility, support reliable AI operations, and help my team make faster, data-driven decisions.
I also appreciate its user interface, which is very intuitive and customizable, making the learning curve smooth for new users. Additionally, I appreciate its proactive monitoring and actionable insights that help my team identify data quality issues early and maintain AI model reliability.
What needs improvement?
WhyLabs could be improved by offering more customizable dashboards and clear recommendations for resolving detected anomalies.
I would like to see more flexible dashboards with customizable alerts, team-specific views, and clear comparisons of model performance over time. When anomalies are detected, WhyLabs could improve by providing actionable recommendations, highlighting the likely root cause, identifying affected data or models, and suggesting practical steps to resolve the issue. This would make monitoring more efficient and help teams respond to problems faster.
For how long have I used the solution?
I have been using WhyLabs for three years.
What do I think about the stability of the solution?
WhyLabs has been very stable. It has maintained a consistent and powerful performance.
What do I think about the scalability of the solution?
It has been very scalable because it can handle my organization's growth. For monitoring AI models and data quality as our workload grows, it has been able to handle the expansion. It also helps my team maintain visibility across expanding data sets and models, supporting efficient monitoring as organizational needs evolve.
How are customer service and support?
The support has been very proactive over the years that I have been using this platform. They have remained very professional. They address issues instantly and offer a solution to every single issue that we face. I would say they are the best customer support I have ever experienced, and my experience has been very positive.
I would rate the customer support nine out of ten. They have been outstanding.
Which solution did I use previously and why did I switch?
Before WhyLabs, we considered traditional monitoring tools, such as Amazon CloudWatch. We switched from Amazon CloudWatch to WhyLabs because it offered a more specialized approach to AI model monitoring and data quality analysis, helping improve visibility into model behavior and detect potential issues early.
How was the initial setup?
Deploying WhyLabs in our AWS environment was relatively straightforward and fair. The setup required some initial configuration and integration work, but the process was manageable with available documentation.
The configuration process was relatively smooth and manageable. Once configured, it provided useful visibility into data quality and AI model performance, supporting efficient monitoring and issue detection.
WhyLabs integrates reasonably well with our AWS-based workflows, supporting data monitoring and AI model observability. This integration helps improve visibility into data quality and model performance, while some initial configuration may be needed depending on the environment.
What was our ROI?
WhyLabs has provided value by helping reduce manual monitoring effort, identifying data quality issues earlier, and improving troubleshooting efficiencies. These benefits can support a positive return on investment through better productivity and more reliable AI operations.
What's my experience with pricing, setup cost, and licensing?
The procurement process for WhyLabs was relatively straightforward with clear evaluation of its features, business value, and integration requirements.
The metering and billing experience was straightforward, transparent, easy to understand, and manageable with cost being an important consideration when planning usage and monitoring workloads.
Which other solutions did I evaluate?
We considered alternatives such as Arise AI, Fiddler AI, and Amazon SageMaker Model Monitor.
What other advice do I have?
Overall, WhyLabs is a valuable tool for AI monitoring and data quality management.
I would rate WhyLabs five out of five. It has been an excellent platform.
The reason I chose a perfect score of five out of five is that it provides valuable AI model monitoring, data quality analysis, and anomaly detection capabilities that support proactive issue identification and reliable AI operation.
Regarding WhyLabs' AI capabilities, it provides valuable AI monitoring and observability capabilities that help my team track data quality, detect anomalies, and identify potential risks. Its monitoring supports reasonable AI governance, while security should be reinforced through appropriate access controls, data protection policies, and regular audits to maintain privacy, transparency, and compliance.
I found WhyLabs very trustworthy and reliable because it provides useful insights into data quality and AI model performance, helping us detect anomalies and identify potential reliability issues early.
I recommend first evaluating WhyLabs based on your AI monitoring and data quality needs. It is also good to start with a focused pilot, integrated with your AWS environment, and configure alerts for important data and model metrics.
Which deployment model are you using for this solution?
Public Cloud
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)
Akashkhurana Hirana
Monitoring multi-agent LLM workflows has become reliable and protects PII in real time
Reviewed on Jun 29, 2026
Review from a verified AWS customer
What is our primary use case?
My main use case for WhyLabs was for LLM monitoring and observability. At that time, I had an AI application that I deployed on Vertex AI, and I used WhyLabs for the observability, logging, and monitoring of that application and the model.
I can provide a specific example of how I used WhyLabs for monitoring my LLM application. It was a multi-agent system with around four agents involved, and each agent had around seven or eight tools that it could use or invoke. Whenever a user sent a query to the main agent, its responsibility was to delegate the request among the other sub-agents. Each sub-agent could communicate with each other using the A2A protocol and call their tools. I monitored how the request progressed through the system. For instance, if a user sent a request to one agent, which then transferred it to a third agent, the third agent used a tool, and then it went to the seventh agent. I could easily monitor all this communication between the agents, the logging time, the request, the response, any errors, and any guardrails I wanted in my application in WhyLabs.
This was my only use case, and then WhyLabs got discontinued. WhyLabs was acquired by Apple in January or February 2025. The company then open-sourced their software so that anyone can use it. It is now open-source software available on GitHub where you can set it up yourself and use it.
What is most valuable?
WhyLabs's best features are real-time guardrails, PII personal information data detection, hallucination mitigation, and monitoring. It has a centralized dashboard so I can create a project and see an overall summary of the dashboards, and I can check the health metric on specific dates or specific times for WhyLabs or for the application. Additionally, it provides an alerting system. If there is an error or the system is down, it generates an alert via email.
Out of all those features, I find the PII detection and the monitoring most valuable in my day-to-day work because it is very hard to monitor an LLM application. As I mentioned earlier, it was a multi-agent system and a query can go from one agent to another agent very easily, which created problems in debugging how the request was progressing and how the data flow was happening. The monitoring and the PII detection of the guardrails are the three features most useful to me. Regarding the guardrails or the PII detection, if I do not want my PII data given to the agents or any LLM, this feature is particularly useful in that scenario.
WhyLabs has positively impacted my organization by reducing the error time and debugging time. It has increased and enhanced the user experience. When the application is down, I receive alerts, which has reduced a significant amount of time for my team.
What needs improvement?
Regarding how WhyLabs can be improved, since it is not available in the market as of now, improvements cannot be made to the product itself. However, there is an open-source version that anyone can set up on their machine and try to accomplish the same things.
I do not think there is anything else needed for improvement.
For how long have I used the solution?
I was using it in 2024 for around 1.5 years.
What was our ROI?
WhyLabs has saved my team time by 30 to 40%.
What other advice do I have?
Regarding WhyLabs's AI capabilities, I believe its governance and security are totally secured. It was deployed in our on-premises infrastructure, so all the data remains in our infrastructure only. The guardrails and the PII detection work perfectly. I have not seen any scenario where it has not generated an alert for PII data or the guardrails have not worked, so it performed very well.
In terms of WhyLabs's AI capabilities, I believe it is totally accurate. I used it for around 1.5 years, and it was the best software available, but it was discontinued. However, it was a very good software.
My advice to others considering WhyLabs is that as of now it is open-source, and you can set it up on your own machine for free and use it. It has very good features. I would rate this product a 10 out of 10.
Which deployment model are you using for this solution?
On-premises
If public cloud, private cloud, or hybrid cloud, which cloud provider do you use?
Amazon Web Services (AWS)
Consulting
I built a monitoring solution with Whylabs for multiple ML models for a client of mine.
Reviewed on Nov 21, 2024
Review provided by G2
What do you like best about the product?
The UI is very user friendly and the support team is extremely responsive and helpful.
What do you dislike about the product?
Some features such as deleting a profile or changing the data type of a feature can only be done through the API.
What problems is the product solving and how is that benefiting you?
Data and concept drift detection Model performance monitoring
Internet
Whylabs helped us setup end-to-end monitoring of our ML projects
Reviewed on Nov 19, 2024
Review provided by G2
What do you like best about the product?
* The customer support is very helpful and proactive * Tool allows for easy ingestion of big number of features and setting up initial monitoring on them * We can use it to monitor both: input quality and model performance * The alerts can be raised to specific group of users via specific channels (email/slack), which is helpful
What do you dislike about the product?
* It can be challenging to setup the monitoring in the correct way when it comes to sensitivity - it requires a lot of trial and error * Some actions are not possible via UI and require specific API calls * Documentation can be hard to navigate
What problems is the product solving and how is that benefiting you?
Monitoring model performance and input data quality in one place.
Houssam K.
Excellent tool for ML Monitoring with many out-of-the box solutions
Reviewed on Nov 14, 2024
Review provided by G2
What do you like best about the product?
Great to collaborate with; very responsive; really appreciate their OHs to help out with issues that pop up; many out-of-the-box solutions for different kinds of ML models which really helped us out given the wide variety of ML models we run at the company.
What do you dislike about the product?
Nothing major to mention! We got everything resolved and the team was very helpful.
What problems is the product solving and how is that benefiting you?