Perfectly Clean, Perfectly Alkaline

Cloud RO

Meet Cloud RO, an under sink reverse osmosis water system that removes 99% of the toxins in your tap and adds the essential minerals your body needs.

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    Auto-ship replacement filters

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    Easy self installation

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    1 year satisfaction guarantee

Buy Cloud RO


Kick the Chlorine

Our activated carbon pre-filters are made from the highest quality coconut shell carbon. The carbon acts like a magnet removing 99% of that nasty chlorine in your tap water.

How Cloud RO Works
  • Meet Cloud RO

    How does Cloud RO work? A lot of science and a little magic. Let’s take a peek under the hood.

Healthy water, every single time.

The smartest water
filter in the world
  • Quality & Performance Monitoring

    Replacement cartridges are auto-shipped based on real time performance monitoring, not an arbitrary timeline.

  • Track Gallons Consumed

    Track how much your family is drinking and how many plastic bottles you have saved in the process.

  • Keep It Alkaline

    Keep tabs on your pH to ensure the water you are drinking is both pure and perfectly alkaline.

  • Toxins Out, Nutrients In

    Check out the toxins we kick to the curb and the nutrients we add to your glass.

How does Cloud RO stack up?

Cloud RO

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Other RO Filters

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Countertop Filters

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Fridge Filter

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Pitcher Filters

Improves Tap Water Taste
Purifies Your Water
Creates Alkaline Water
App Enabled
Easy to Replace Filters
Auto-ship filters based on usage
I can't believe how easy Cloud is compared to my last filter. Auto-ship filter replacements that are also easy to change?! I literally tell everyone I know to order one. Group 3Nick Braun
Columbus, OH
Using concentrated pressure, water is pushed through an RO (reverse osmosis) membrane: a semi-permeable, compact membrane that even micro-sized heavy metals, pesticides and volatile organic compounds (VOCs) can’t slip through. Heck, even fluoride and lead are out of luck. They all have a one-way ticket to the waste drain. A high-quality reverse osmosis system can remove up to 99% of the contaminants found in tap water. Some under-the-sink RO units, like Cloud RO, even add essential trace minerals back into the water. When it’s all said and done, your family can enjoy toxin-free, nutrient-rich, perfectly alkaline water every time. Read more about reverse osmosis here.
Simply put, alkaline water is water with a pH of 7 to 10. Your average tap water has a pH around 7. But when it comes to nutrition and the health benefits of drinking alkaline water, pH isn't the only piece of the puzzle... Alkaline water should also contain alkalizing minerals like calcium, magnesium, sodium and potassium. These minerals help the cells produce energy, fight inflammation, and support nearly every organ in the body. Cloud RO produces alkaline water by running purified water through a final remineralization stage. This process naturally raises your water's pH and adds back these trace minerals providing you with perfectly clean, perfectly alkaline drinking water. Read more about alkaline water here.
Yes! Cloud RO raises your water’s pH to alkaline levels by adding essential trace minerals like calcium and magnesium back into the purified water before it hits your glass. This process is called remineralization. These minerals are healthy, they help your water taste better, and they help deliver the alkaline water you are looking for! Read more about the alkaline filtration process here.
Cloud RO is really smart. Internal sensors track both water usage, and water quality. Unlike most competitor products we don't tell you to replace your filters every 6 months. That is an arbitrary timeline, and we know that every household is different. A family of six needs to replace filters more often than a family of two. So, what does that mean. It means that when your system needs a change we notify you and ship you out the necessary replacement. Easy peasy. On average a family of four you can expect to budget $200 per year, but again, this is an average and we promise to only get you replacement filters when you need them.
Kind of, not really… well, it’s complicated. The reverse osmosis process is one of the most powerful purification processes on earth. To answer the question, we need to take a step back to fully understand how the filter works. Using concentrated pressure, water is pushed through an RO (reverse osmosis) membrane: a semi-permeable, compact filter that even micro-sized heavy metals, pesticides and volatile organic compounds (VOCs) can’t slip through. All of the nasty toxins are forced one way, and pure water is forced the other way. The dirty, toxin ridden water, also referred to as grey water, is sent packing down your drain pipe. You are left with pristine drinking water. So, does Cloud RO waste water? Technically yes, the ratio of dirty water to clean drinking water is about 1:1. This is also the reason we only recommend using the RO process for drinking and cooking water supplies and not whole house systems. And while the dirty water is technically “waste” we would argue that grey water is unfit for human consumption anyhow. Read more about the benefits of reverse osmosis here.
An emphatic YES! From a water purification process, Cloud RO and bottled water filtration are likely similar. Most bottled water manufacturers use reverse osmosis just like we do. BUT bottled water lacks the regulation needed to ensure you and your family aren’t consuming harmful chemicals. Multiple studies have found that bottled water contains heightened levels of PFAs, microplastics, and even arsenic. Furthermore, plastic leaching can introduce harmful BPAs after the water has been bottled and sits in the container for days, months or years. Last, but certainly not least bottled water is causing an environmental crisis. Over 1 million bottles of waters are purchased every single minute, and 80% of those are not recycled. So, for yourself, for your family, and for the planet earth, stop buying bottled water and start filtering. Read more about bottled water toxicity here.
If you are a handy DIYer then yes, you can certainly install Cloud RO yourself. The process is straightforward and we provide detailed video instructions. Cloud has a unique modular design that makes self-installation much easier than other RO products on the market. With all plumbing related installations however, the risk of flooding is always a possibility. If you’re unsure if you can install, find a local professional to install your Cloud water filtration system for you. Rest assured that our Cloud Customer Happiness Team is always here to help. Email us anytime at
Yes, a small drinking water faucet is required and is installed next to your main faucet. This faucet is included in your purchase and comes in a variety of styles and finishes to match your existing fixtures. The dedicated drinking water faucet can replace an existing soap dispenser, water sprayer, or plug. If you do not have one of these existing holes, a new one can be drilled. Drilling the faucet hole can be tricky and we recommend you source a professional for the job. Usually, the question we get next is, "Why doesn't Cloud just hook up to my main sink faucet?!" Well it's a good question and the answer is pretty straightforward. Cloud RO features super powerful reverse osmosis filtration, and this process is a bit slow. So, the filtered water is stored in a 3-gallon tank ready for you to drink. If you were using that same water for dishes and hand washing then you would run out of water pretty quickly. Secondly, reverse osmosis does create wastewater (more on that above). Using filtered water for household activities like dishes ends up wasting more water than necessary.

Do you know what’s in your tap water?

Have you thought about what's in your tap water? You should check.