Real-Time Scientific-Grade
Sensing Buoys with
Actionable Marine Insights

Spinout from Woods Hole Oceanographic Institution, backed by NSF, NOAA, DOE, and more—combining lower-cost, scientific-grade sensing, robust buoy hardware, and cloud analytics to unlock new possibilities in marine monitoring.

Affordable Scientific-Grade Data: Powered by Cloud-Connected Buoys & Real-Time Insights

  • Affordable Scientific-Grade Sensing

    Measure what matters customize your sensing suite from basic water quality monitoring of oxygen, temperature, and salinity to sensing of winds, waves, currents, pH, CO₂, turbidity, chlorophyll a, CDOM, TLF, and light.

  • Rugged, Solar-Powered Buoys

    Operate 24/7 in harsh conditions—storms, gale force winds, and ice coverage—with minimal maintenance.

    Lightweight and just 22" wide for easy deployment and repositioning as project needs change.

  • Real-Time Marine Data & Insights

    Securely stream data to the cloud

    Dashboards, anomaly detection, and alerts for streamlined data visualization, analysis tools, and early warnings of harmful marine events including hypoxia and algal blooms.

Marine Carbon Removal and Beyond: Where We Can Help

Subtidal began with a mission to deliver the first solution for directly measuring marine carbon dioxide removals. Our platform is actively deployed for mCDR applications. The technology is also equipped to handle a range of ocean and coastal monitoring challenges, from continuous sensing of water quality, tide and weather conditions, carbonate chemistry, and currents to real-time data analytics.

Actively Piloting: Marine Carbon Dioxide Removal

  • Continuous Measurement of Net Carbon Removal (“Volumetric Carbon Flux”) and Air–Sea CO₂ Exchange: Developed specifically to measure net carbon removal in real-world ocean environments across marine carbon dioxide removal approaches—ensuring credible climate outcomes.

  • Proven in Ocean Deployment: Rigorously tested under harsh conditions, showing reliable performance, constant data transmission, and verified carbon removal measurement.

  • Ecosystem-Aware: We don’t just track carbon; we also monitor pH, oxygen, turbidity, chlorophyll a and other ecosystem indicators, ensuring that mCDR approaches are not only effective, but also environmentally safe.

Broader Applications

Coastal Monitoring & Water Quality

  • 24/7 Water Quality Data: Salinity, temperature, dissolved oxygen, turbidity, chlorophyll a, pH, and CDOM—all measured continuously for a complete water column profile.

  • Atmospheric, Wave & Current Sensing: Wind speed/direction, air temperature, humidity, barometric pressure, and current measurements—helping you assess ocean conditions in real time.

  • Harmful Marine Event Detection: Harmful algal blooms (HABs), hypoxia, and marine heat waves.

Scientific Research

  • High-Frequency, Multi-Depth Sensing: Ideal for universities, labs, or collaborative research needing robust water column sensing.

  • Currents, Winds & Waves: Capture physical oceanographic parameters for advanced modeling or field studies.

Trusted Technology, Ready for Collaboration

Key Differentiators

  • Woods Hole Oceanographic Institution (WHOI) Heritage & Leading Funders – A spinout from Woods Hole Oceanographic Institution, backed by NSF, NOAA, DOE, Schmidt Marine Technology Partners, Creative Destruction Lab, and Ocean Visions.

  • Field-Tested Reliability – Over a year of testing in extreme conditions with continuous data connectivity.

  • Flexible & Future-Ready – Sensor suite easily tailored to new projects; analytics evolving to include prediction and forecasting.

  • Cost-Effective, High-Impact – Scientific-grade data at lower price points than traditional research instruments.

Partners

Ready to Elevate Your Marine Monitoring?

Request a Demo: Get a personalized walkthrough of our buoy and analytics platform to see how we can support your operations or research.

Propose a Pilot: If you’re facing critical challenges, let’s discuss piloting our solution in your environment. We’ll learn together and refine the platform for your unique needs.

Stay Informed: Sign up for updates about upcoming deployments, sensor integrations, and new analytics features—plus ways to get involved.

Meet Our Team

At Subtidal, we’re united by our passion for the oceans, regeneration, and data-driven innovation. A proud spinout from the world-renowned Woods Hole Oceanographic Institution, we leverage 20 years of deep expertise from our Co-Founder & Chief Scientific Officer, Dr. Matt H. Long, who pioneered advanced marine carbon and ecosystem monitoring solutions.

  • CO-FOUNDER & CEO

    Casey has spent the last 15 years building startups with a social good. She was formerly COO @ Greener Grazing, where her team was working to eliminate methane in cows through ocean-based Asparagopsis seaweed farming, and was previously Head of Product @ Spire, the first wearable to track mental and physical health via respiratory monitoring. She was named Most Influential Foreigner in China in 2010 for founding China’s first person-to-person microfinance platform, Wokai.

  • CO-FOUNDER & CHIEF SCIENTIFIC OFFICER

    Matt has spent the last 15 years figuring out how to solve hard carbon flux measurement problems in our oceans. Hailing from Woods Hole Oceanographic Institution (WHOI), Matt is a world leader in biogeochemistry, ocean engineering, and fluid dynamics to combine existing technologies to create transformational ocean technologies.