The best stability testing software
OCCT is an all-in-one stability testing and monitoring solution trusted by millions of users and hardware professionals worldwide. Whether you're validating a single system or performing quality assurance across an entire production line, OCCT provides the tools you need to stress test, monitor, and certify every system with confidence.
Use cases
The perfect match
System integrators
Stability isn't optional. From PC builders and RMA technicians to system integrators, OCCT provides the tools to validate, diagnose, and certify every system with confidence.
Hardware Manufacturers
Ensure quality and reliability at every stage. OCCT helps you validate every system and component with a comprehensive suite of stress tests, real-time monitoring, and detailed reports.
Servers & Workstations
Ensure maximum uptime and performance for servers, workstations, cloud infrastructure, and AI systems with OCCT's advanced stress testing and diagnostic tools.
Research & Government
From research laboratories to defense applications, OCCT helps validate mission-critical systems with comprehensive stress testing and real-time monitoring.
Memory Manufacturers & Assemblers
Validate memory hardware before shipment with OCCT's modular Memory Stress Test, and reduce RMA's.
Art Studios & Game Developers
Validate system stability and rule out hardware issues when troubleshooting crashes, freezes, or unexpected behavior during rendering, development and testing.
OCCT features
We've got you covered
Editions
Pro
All details
Enterprise
All details
Enterprise+
All details
OCCT by the numbers
A trusted solution worldwide
8 modular
Stability tests
70M+
Downloads
20+ years
of expertise
Meet our partners
Proud sidekick of the industry's best
We're not letting you down
Need help?
Not sure if OCCT is right for your business? Have a question you can’t find the answer to? Visit our Support page for frequently asked questions or contact our team using the 'Contact us' button below.
Let's work together
OCCT feat. your brand
OCCT means optimized hardware. Whether you're already an OCCT professional user or are about to become one, discover how you can leverage the OCCT brand to showcase your validated hardware and strengthen your marketing. Click “Learn more” to discover the tools available with your license (including certificate logos and reports) as well as our co-marketing opportunities.
Our latest news
Stay up to date
OCCT v17 Stable Now Available: New Memory Test Presets, Launcher and optimizations
Following a few weeks of beta testing, OCCT v17 is now officially released, bringing a new launcher, major optimizations, and a redesigned Memory Test with new presets.
OCCT
2026-06-30
OCCT v17 Beta: New Memory Test, Major Optimizations, and A Community Contest
OCCT
2026-05-22
