Managing diabetes has evolved significantly with the rise of Continuous Glucose Monitoring (CGM) systems—wearable technology that provides real-time glucose data without the need for constant finger pricks. Whether for type 1 or type 2 diabetes, CGMs empower patients with timely insights, trend analysis, and alerts to prevent dangerous highs or lows. In this guide, we explore the top 10 CGM brands leading the global market, known for innovation, accuracy, comfort, and integration with insulin delivery systems. Discover the key players shaping the future of digital diabetes care, complete with detailed brand summaries for each.
1. Dexcom
Dexcom is one of the most well-known and respected CGM manufacturers in the world. Based in California, Dexcom has consistently pushed the boundaries of real-time glucose monitoring. Their current flagship, the Dexcom G7, is the result of years of engineering innovation. It offers a slimmer, more discreet sensor design with a simple one-button applicator for improved comfort and usability.
The Dexcom G7 delivers glucose readings every 5 minutes and offers customizable alerts to help users avoid hypoglycemia and hyperglycemia. Integration with Apple Watch and other wearables further enhances user experience. Dexcom’s CGMs are widely used not only by individual patients but also integrated into closed-loop insulin delivery systems, making them suitable for both personal and clinical diabetes management. The system requires no calibration and offers 10-day wear with fast warm-up time (just 30 minutes).
Healthcare professionals praise Dexcom’s Clarity software platform for providing detailed insights and remote monitoring capabilities. Dexcom’s consistent focus on usability, precision, and real-time analytics makes it a gold standard for continuous glucose monitoring.
2. Abbott (FreeStyle Libre)
Abbott’s FreeStyle Libre line has made Continuous Glucose Monitors accessible to millions by prioritizing affordability, ease of use, and scalability. Launched in 2014, the FreeStyle Libre revolutionized diabetes care by removing the need for fingersticks and offering a sensor-based system where users scan to get their readings. The Libre 2 and Libre 3 provide real-time glucose readings, optional alarms, and integration with digital platforms for remote patient monitoring.
The FreeStyle Libre 3 features a thinner sensor, a fully real-time app-based display, and 14-day wear. It’s one of the smallest CGMs available globally. Unlike traditional CGMs that transmit data continuously, Libre’s earlier versions required manual scanning—although Libre 3 now updates automatically via Bluetooth.
Abbott also offers LibreView, a cloud-based platform for clinicians to track patient trends, adjust therapy, and engage remotely. The brand is especially strong in global markets, with regulatory clearance in North America, Europe, and Asia. Abbott’s vision for democratizing Continuous Glucose Monitor access through affordable and intuitive technology makes it a household name among diabetes patients worldwide.
3. Medtronic (Guardian Connect)
Medtronic, a pioneer in medical technology, offers a comprehensive CGM solution through its Guardian Connect system. Unlike other brands that focus solely on glucose tracking, Medtronic integrates its CGMs with insulin pumps and smart algorithms to create a closed-loop insulin delivery system, often referred to as an “artificial pancreas.”
The Guardian Connect provides predictive alerts up to 60 minutes in advance, helping users proactively manage blood sugar fluctuations. The system is powered by SmartGuard technology, which suspends insulin delivery before hypoglycemia occurs, based on sensor readings and trend analysis. The sensors are calibrated using fingersticks, but Medtronic continues to work on reducing calibration requirements in newer versions.
Paired with the CareLink software, users and healthcare professionals can access comprehensive trend graphs, glucose variability statistics, and event markers. Medtronic remains a top choice for insulin-dependent patients who want tight control and real-time feedback. Its deep integration with therapy management and predictive capabilities gives it a unique position in the Continuous Glucose Monitor market.
4. Senseonics (Eversense)
Senseonics’ Eversense system is a truly innovative take on Continuous Glucose Monitors, being the world’s first long-term, implantable CGM. Unlike other CGMs that are worn externally and replaced every 10–14 days, Eversense implants a sensor under the skin that can last up to 180 days, significantly reducing the hassle of frequent sensor changes.
The system uses a removable smart transmitter that sits on the skin above the implant. This transmitter powers the sensor and sends real-time data to a mobile app. It also provides on-body vibration alerts for hypo- or hyperglycemic events—useful even when users aren’t near their phones.
Senseonics partnered with Ascensia Diabetes Care to distribute Eversense globally. The system’s extended wear time, minimal maintenance, and strong clinical accuracy make it a game-changer, especially for patients seeking less interruption in their lifestyle. It is currently approved in both the US and Europe, and newer versions promise even longer wear times and improved sensor size and insertion processes.
5. Ascensia Diabetes Care (Contour + Eversense Partner)
Ascensia Diabetes Care, a global diabetes technology company headquartered in Switzerland, is best known for its Contour blood glucose monitoring systems. While Contour meters serve the fingerstick-based market, Ascensia’s partnership with Senseonics makes them a direct player in the Continuous Glucose Monitor field as the exclusive commercial distributor of the Eversense system.
Ascensia is focused on providing smart diabetes solutions that blend ease-of-use with clinical-grade performance. The company’s Contour app offers smart logs, trend summaries, and pattern recognition that can be used alongside Eversense data for comprehensive glucose management. Their open approach to data integration and compatibility with platforms like Apple Health and Glooko enhances the patient experience.
By combining the long-term, implantable technology of Eversense with their global reach and support infrastructure, Ascensia is well-positioned to challenge traditional Continuous Glucose Monitor players. They remain committed to advancing diabetes care through both continuous and point-in-time glucose monitoring solutions.
6. Tandem Diabetes Care
Tandem Diabetes Care is a medical device company focused on insulin pump technology and diabetes management platforms. While Tandem doesn’t manufacture its own Continuous Glucose Monitor, it plays a critical role in CGM-enabled therapy through seamless integration with Dexcom sensors. The t:slim X2 insulin pump is one of the most popular systems using Control-IQ technology—a hybrid closed-loop system that automates insulin delivery based on Continuous Glucose Monitor input.
This integration allows Tandem to optimize glucose control in real-time by adjusting basal rates or delivering correction boluses. Users can access detailed glucose trends, insulin delivery data, and reports via Tandem’s mobile app and web dashboard. The system is FDA-cleared for both children and adults.
Tandem emphasizes sleek design, ease of use, and connectivity. The company’s updateable firmware model also allows users to get new features without replacing devices—something rare in the medical device field. Tandem’s innovation in insulin-CGM synergy makes it a vital part of the modern diabetes management ecosystem.
7. GlucoMen Day (A. Menarini Diagnostics)
GlucoMen Day Continuous Glucose Monitor is developed by A. Menarini Diagnostics, an Italian diagnostic solutions company with a strong presence across Europe. The system is designed for real-time, needle-free continuous glucose monitoring with a strong focus on comfort and ease of use.
What sets GlucoMen Day apart is its electrochemical sensor, which uses a thin, flexible filament inserted just under the skin—without a needle. The system delivers glucose readings every minute and transmits data to the GlucoMen Day app for real-time monitoring. The sensor lasts up to 14 days and is fully rechargeable.
The GlucoMen Day CGM is CE-marked and used widely across European markets for both type 1 and type 2 diabetes management. With an emphasis on minimal invasiveness and high-frequency data collection, GlucoMen Day is increasingly chosen by those looking for alternatives to traditional Continuous Glucose Monitors. It’s ideal for patients who want discreet, reliable glucose monitoring without calibration.
8. Ypsomed (mylife Loop / CGM Integrator)
Ypsomed is a Swiss medical technology company best known for its mylife YpsoPump insulin delivery system. While not a Continuous Glucose Monitor manufacturer, Ypsomed is a key CGM ecosystem partner through its integration with the Dexcom G6 sensor as part of its mylife Loop solution.
mylife Loop enables automated insulin adjustments based on real-time Continuous Glucose Monitor data, creating a hybrid closed-loop system. Ypsomed’s platform is particularly user-friendly, with a touchscreen interface, app-based monitoring, and Bluetooth connectivity. This integration empowers patients to manage diabetes more efficiently and confidently.
With its modular system and strong emphasis on user autonomy, Ypsomed appeals to tech-savvy patients who prefer customizable solutions. The brand is growing rapidly in Europe and expanding globally, helping redefine what CGM-enabled insulin delivery can look like in the future.
9. CamDiab (CamAPS FX App)
CamDiab is a digital health company spun out from Cambridge University, best known for its CamAPS FX app, a core component of automated insulin delivery systems. Though not a Continuous Glucose Monitor manufacturer, CamDiab’s software connects directly to Dexcom CGMs and insulin pumps to form a closed-loop system.
CamAPS FX is designed to work with Android smartphones and supports real-time data exchange, adaptive insulin algorithms, and cloud-based monitoring. Its flexibility and ease of use make it particularly popular in pediatric diabetes care, as it supports young children as well as adults.
Clinicians appreciate CamDiab’s academic foundation and focus on clinical trials. The app is CE-marked and has been rolled out across several European markets. Its contribution to CGM-based insulin automation makes it a pivotal brand in digital diabetes care.
10. Medtrum (Nano CGM)
Medtrum is a China-based medical technology company specializing in diabetes care. Its Nano CGM system is designed for minimal-lag, real-time glucose monitoring and works seamlessly with Medtrum’s tubeless insulin patch pumps.
The Nano CGM offers a 14-day wear period and a compact sensor profile. It delivers updates every minute and syncs with the Medtrum EasyPatch app for instant access to glucose trends, alerts, and daily averages. The system supports predictive alarms for proactive glucose control.
With CE certification, Medtrum is expanding its presence in Europe and other regions. Its focus on affordability, integration, and ease-of-use positions it as a rising alternative in the Continuous Glucose Monitor space. The Nano CGM is ideal for patients looking for a discreet, intelligent solution that works with or without insulin therapy.
