Openlayer – Test, fix, and improve your ML models
Hey HN, my name is Vikas, and my cofounders Rish, Gabe and I are building Openlayer: http://openlayer.com/ Openlayer is an ML testing, evaluation, and observability platform designed to help teams pinpoint and resolve issues in their models. We were ML engineers experiencing the struggle that goes into properly evaluating models, making them robust to the myriad of unexpected edge cases they encounter in production, and understanding the reasons behind their mistakes. It was like playing an endless game of whack-a-mole with Jupyter notebooks and CSV files — fix one issue and…
Openlayer – Test, fix, and improve your ML models launched on May 15, 2023 with 53 votes, #1,494 of 4,910 launches that month and more than 90% of that year's launches. The site was still online in September 2026, 3 years on.
In plain words
Openlayer is a platform for testing, evaluating, and monitoring machine learning models in production. It helps ML teams identify and fix issues like unexpected edge cases and model errors that traditional software testing tools cannot handle. The platform is designed for teams struggling with error analysis, model robustness, and understanding prediction failures across diverse datasets. It addresses the challenge of manually tracking issues through notebooks and spreadsheets by providing a centralized system for evaluation and observability.
written from the facts on this page · September 2026
From the sources
Openlayer is the AI governance and observability platform for regulated enterprises: one place to test, monitor, and govern every model, agent, and AI system your company runs.
The AI governance platform that tests before you ship, monitors what's live, and enforces policy in real time. Audit-ready evidence comes standard. Your controls are not keeping up. Your controls are not keeping up. Copilots, agents, and models are going to production across every business unit. Most companies can't list them, few can test them, and almost none can prove to a regulator what any of them did last Tuesday. Each layer delivers value on its own. Together, they turn scattered AI into systems you can govern, observe, and prove are under control. Know every AI system running, org-wide inventory and automatic shadow-AI detection. You can’t govern what you can’t see, so this is where…from openlayer.com
In the maker’s words, at launch
Hey HN, my name is Vikas, and my cofounders Rish, Gabe and I are building Openlayer: http://openlayer.com/ Openlayer is an ML testing, evaluation, and observability platform designed to help teams pinpoint and resolve issues in their models. We were ML engineers experiencing the struggle that goes into…
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