Willow Go Vs Momcozy M5: Which Wearable Breast Pump Wins in 2026?

My Personal Journey with Wearable Breast Pumps

When I had my first baby, I was tethered to a traditional wall pump for hours every day. I remember sitting in one spot, unable to chase after my toddler or even grab a snack without interrupting my pumping session. With my second child, I discovered wearable pumps, and honestly, it felt like I had been given my life back.

I tested both the Willow Go and Momcozy M5 extensively throughout my second breastfeeding journey. From pumping while preparing breakfast to discreetly expressing milk during family gatherings, these pumps became my constant companions. Now, I want to share everything I’ve learned about both options to help you choose the one that’s right for you.

Quick Comparison Overview

Quick Verdict: Head-to-Head Winner in Each Category

Design and Comfort: How They Actually Feel

Willow Go Design

The Willow Go features a sleek, low-profile design that truly mimics the natural shape of your breast. When I wore it under a loose-fitting top, even my mother-in-law didn’t notice I was pumping during our family dinner. The pump sits flat at the base, which means you can actually set it down upright on a counter without worrying about spilling milk everywhere.

However, I did notice that the Willow Go is heavier than the Momcozy M5. At 385 grams per pump, I could definitely feel the weight after wearing it for an extended period, especially as the milk container filled up. For moms with larger breasts, this added weight might create some discomfort over time.

Momcozy M5 Design

The Momcozy M5 completely won me over with its lightweight design. At just 230 grams, it’s significantly lighter than the Willow Go, and I barely felt it in my bra throughout the day. The unique horizontal pumping angle—what Momcozy calls their “Baby Mouth” concept—really does feel more natural and comfortable during pumping sessions.

The round, compact design of the M5 fits beautifully in most nursing bras without creating odd bulges or angles. My only complaint is that the pump doesn’t sit upright on its own, so I had to be more careful when setting it down during use. One time, I set it on the kitchen counter and it rolled over, causing a small spill—lesson learned!

Suction Power and Performance: What Really Matters

Willow Go Performance

With hospital-grade suction up to 280 mmHg, the Willow Go delivers impressive performance. I consistently pumped 4-5 ounces in about 10 minutes, which was actually better output than I achieved with my traditional wall pump. The suction pattern feels sophisticated and gentle—instead of a harsh, mechanical pull, it mimics a baby’s natural nursing rhythm with shorter, more delicate bursts.

The 15 levels of customization (6 for stimulation mode and 9 for expression mode) allowed me to fine-tune my pumping experience throughout the day. In the morning when I was engorged, I used higher levels, while gentler settings worked better for my midday sessions.

Momcozy M5 Performance

The Momcozy M5 offers suction up to 270 mmHg, which is just slightly less than the Willow Go. In my real-world testing, I noticed the M5 has a more straightforward, “let’s get it done” pull. While it’s not as sophisticated as the Willow Go’s gentle tug-and-release pattern, it’s still effective for most pumping sessions.

The M5 features 3 modes (Stimulation, Expression, and Mixed) with 9 levels each. I found myself primarily using the Expression mode, though the Mixed mode with its micro-vibration technology was fantastic for those difficult letdown days. The vibration feature genuinely helped loosen my milk ducts and improved my overall output.

Battery Life and Convenience Features

Willow Go Battery and App

The Willow Go lasts for about 3 pumping sessions per charge. While this wasn’t terrible, I found myself charging it almost daily, especially during my peak pumping days. On the bright side, the app connectivity was a game-changer. I could start, stop, and adjust suction levels right from my phone without reaching under my shirt.

The app also tracks your pumping sessions, milk output, and provides access to expert-backed content from lactation consultants. As someone who loves data, I appreciated being able to see my pumping patterns over time. However, the app doesn’t automatically stop the pump when containers are full, so I still had to pay attention during sessions.

Momcozy M5 Battery and Controls

Here’s where the Momcozy M5 truly shines. With battery life lasting 5-6 pumping sessions (100-120 minutes total), I only needed to charge it every 2-3 days. This was especially convenient during busy weeks when I’d forget to plug things in overnight.

The M5 uses manual controls with an LED display on the device itself. While some might see this as less advanced than app control, I actually found it refreshing. There were times when my phone died or I didn’t want to fiddle with Bluetooth connections, and the simple button controls on the M5 were perfect. The pump also has memory function, so it remembers your last-used settings.

Cleaning and Maintenance: The Daily Reality

Willow Go Cleaning

One of my favorite features of the Willow Go is that 5 out of 6 parts are dishwasher safe. After a long day of pumping, the last thing I wanted to do was hand wash tiny pump parts. I could simply toss most components in the dishwasher and move on with my evening. The parts are also designed to be easy to assemble, even with one hand while holding a fussy baby.

Momcozy M5 Cleaning

The Momcozy M5 requires hand washing only, which was admittedly a bit tedious. However, the simplified design means there are fewer parts overall to clean. I developed a routine of washing them right after each session with warm soapy water, which only took about 5 minutes. The M5’s silicone parts are smooth and easy to clean, though I needed to be thorough to prevent milk residue buildup.

Price and Value Comparison

Let’s talk about the elephant in the room—the significant price difference between these two pumps. The Willow Go retails for $349.99 for a double pump, while the Momcozy M5 typically costs between $189.99 and $199.99. That’s a difference of about $160!

Both pumps are FSA/HSA eligible, and many insurance plans will cover a portion of the cost through the Affordable Care Act. I was able to get about 40% off my Willow Go through my insurance, bringing the out-of-pocket cost down considerably. Make sure to check with your insurance provider before purchasing either pump.

What You Get for Your Money

Willow Go ($349.99) includes:

• 2 pump motors
• 2 reusable 5oz containers (7oz available separately)
• 21mm and 24mm flanges (27mm available separately)
• All necessary parts and accessories
• App connectivity with expert resources
• Dishwasher-safe components
• 1-year manufacturer warranty

Momcozy M5 ($189.99-$199.99) includes:

• 2 pump motors (or 1 for single pump option)
• Hard-shell carrying case
• 17mm, 19mm, 21mm, and 24mm flange inserts
• Dust covers for flanges
• All necessary parts and accessories
• USB-C charging cables

When I calculated the total value, the Momcozy M5 actually includes more flange size options right in the box, plus a protective carrying case. The Willow Go requires separate purchases for additional accessories like the carrying case and larger containers. For budget-conscious moms, the M5 offers incredible value right out of the box.

Willow Go Pros and Cons

Momcozy M5 Pros and Cons

Who Should Choose the Willow Go?

Based on my extensive testing, the Willow Go is the better choice if you:

• Have a flexible budget or good insurance coverage
• Experience nipple sensitivity or discomfort with traditional pumps
• Want hospital-grade suction for maximum milk output
• Prefer app-controlled convenience and pumping data tracking
• Need a pump that sits upright to minimize spills
• Value dishwasher-safe parts for easy cleaning
• Pump frequently (5+ times per day) and need superior performance
• Want access to lactation consultant resources through the app
• Are willing to invest more for premium features and comfort

Who Should Choose the Momcozy M5?

The Momcozy M5 is the smarter investment if you:

• Are working with a limited budget or want maximum value
• Prefer lightweight pumps for all-day wear without fatigue
• Want extended battery life with less frequent charging
• Don’t need or want app connectivity
• Have an established milk supply without sensitivity issues
• Appreciate simple, straightforward manual controls
• Want more flange size options included in the package
• Pump 3-4 times per day or use it as a backup pump
• Prefer a compact pump that fits discreetly in any bra
• Are willing to hand wash parts for significant cost savings

Real Mom Experiences: What Others Are Saying

I’m not the only one who’s tested these pumps extensively. Here’s what other moms in my nursing support groups have shared:

“I bought the Willow Go after struggling with my traditional pump, and I honestly wish I had splurged on it from the beginning. The suction is so gentle that I can pump without wincing, and I’m getting more milk than ever before. Yes, it’s expensive, but my mental health and breastfeeding success are worth every penny.” – Sarah, exclusive pumper for 8 months

“The Momcozy M5 is my holy grail! I was skeptical about the price difference, but I’m so glad I gave it a try. It works beautifully, the battery lasts forever, and I love how lightweight it is. I pumped while making dinner, folding laundry, and even during my toddler’s meltdowns. For under $200, it’s an absolute steal.” – Jessica, working mom of two

“I started with the Momcozy M5 and later upgraded to the Willow Go. Both are excellent pumps, but the Willow Go’s suction pattern is noticeably gentler on my sensitive nipples. The dishwasher-safe parts are also a game-changer when you’re already exhausted. If you can afford it, go for the Willow Go.” – Amanda, first-time mom

Common Questions: Momcozy M5 Vs Willow Go

Can I Use These Pumps with My Insurance?

Yes! Both the Willow Go and Momcozy M5 are FSA/HSA eligible. Many insurance plans cover wearable breast pumps under the Affordable Care Act, though you may need to pay an upgrade fee. I recommend contacting your insurance provider or using services like Aeroflow Breastpumps to determine your exact coverage. Some moms get up to 40% coverage, significantly reducing the out-of-pocket cost.

Which Pump is Quieter?

Both pumps are impressively quiet! The Willow Go operates at an ultra-quiet level, while the Momcozy M5 measures less than 50dB. In my experience, both were discreet enough for pumping in public spaces. I pumped with the Willow Go during a work conference call, and my colleagues had no idea. The M5 was equally quiet during my grocery shopping trips.

Can I Bend Over While Wearing These Pumps?

This is where you need to be cautious with both pumps. Neither the Willow Go nor the Momcozy M5 is completely leak-proof when bending over. The Willow Go is leak-proof up to 45 degrees, while the M5’s design provides some protection but isn’t foolproof. I learned this the hard way when I bent over to pick up my toddler’s toy while wearing the M5—instant spill! If you need to bend frequently, consider the Willow 360 instead, which offers 360-degree leak-proof mobility.

How Long Do Replacement Parts Last?

For the Willow Go, you should replace the diaphragm and duckbill valves every 90 days with regular use. The Momcozy M5 recommends replacing accessories every 3 months as well. In my experience, I replaced parts every 2-3 months depending on how frequently I was pumping. Watch for signs like decreased suction or visible wear on the silicone components.

Which Pump is Better for Exclusive Pumping?

For exclusive pumpers who need maximum output and efficiency, I’d lean toward the Willow Go. The hospital-grade suction, larger capacity options, and superior comfort make it ideal for 8+ pumping sessions daily. However, if budget is a concern, the Momcozy M5 can absolutely work for exclusive pumping—just expect to empty containers more frequently and potentially pump a bit longer per session.

Tips for Success with Wearable Breast Pumps

Having used both pumps extensively, here are my top tips for getting the best results:

My Final Verdict: Willow Go Vs Momcozy M5

If I could only recommend one pump to a friend with unlimited budget and sensitive needs, I’d choose the Willow Go. Its hospital-grade suction, gentle pumping pattern, app connectivity, and dishwasher-safe convenience justify the higher price tag. It’s the premium option that delivers superior comfort and performance, especially for moms who pump frequently or struggle with sensitivity.

However, if that same friend was budget-conscious or simply wanted excellent value, I’d enthusiastically recommend the Momcozy M5. At nearly half the price, it delivers impressive performance, incredible battery life, and a lightweight design that makes all-day wear comfortable. For many moms, the M5 provides everything they need without the premium price tag.

Personally, I kept both pumps! I used the Willow Go as my primary pump for early morning sessions when I needed maximum output, and the Momcozy M5 became my go-to for quick afternoon pumps and running errands. Having both options gave me flexibility, though I recognize this isn’t realistic for most budgets.

Making Your Final Decision

Here’s my honest recommendation based on different scenarios:

Choose the Willow Go if: You’re an exclusive pumper, have nipple sensitivity, want the absolute best technology available, or have good insurance coverage that reduces the out-of-pocket cost.

Choose the Momcozy M5 if: You’re working with a tight budget, want a lightweight pump for all-day comfort, pump 3-4 times daily, or need a reliable backup to a traditional pump.

Consider buying both if: You pump frequently (like I do!), want options for different situations, or can afford to invest in premium and budget options for maximum flexibility.

Where to Buy and Current Deals

Both pumps are available through multiple retailers, and prices can vary. Here’s where I recommend looking:

Willow Go: Available on Amazon, Target (watch for baby registry discounts!), and through insurance providers. I scored mine for $216 during a Target sale using a registry completion discount plus a 15% Circle offer.

Momcozy M5: Available on Amazon, Walmart, and the official Momcozy website. The brand frequently runs sales, and I’ve seen it as low as $170 during major shopping events. Amazon often has additional coupon codes available.

Don’t forget to check with your insurance provider about coverage options. Many moms don’t realize they can get these pumps partially or fully covered through their health insurance. Visit our comprehensive guide on getting free breast pumps through insurance for detailed information on maximizing your benefits.

Additional Resources for Your Pumping Journey

Choosing the right breast pump is just one piece of your breastfeeding success story. I’ve created several comprehensive guides that might help you on this journey:

• 10 Best Wearable Breast Pumps – My complete ranking of all wearable pumps I’ve tested
• How to Get a Free Breast Pump Through Insurance – Step-by-step guide to maximizing your insurance benefits
• More Breast Pump Reviews and Guides

Final Thoughts from a Fellow Pumping Mom

As I write this, I’m currently pumping with my Momcozy M5 while my toddler naps beside me—a situation that would have been impossible with my old traditional pump. The freedom that wearable pumps provide has genuinely transformed my breastfeeding experience, and I wish every mom could experience this convenience.

Whether you choose the premium Willow Go or the budget-friendly Momcozy M5, you’re making an investment in your breastfeeding journey and your sanity. Both pumps have allowed me to be present with my children, maintain my milk supply, and reclaim precious hours of my day.

Remember, the “best” breast pump is the one that you’ll actually use consistently. Some moms thrive with the Willow Go’s advanced features and gentler suction. Others love the Momcozy M5’s simplicity and extended battery life. Trust your instincts, consider your unique situation, and know that whichever pump you choose, you’re giving your baby the incredible gift of breast milk.

Your breastfeeding journey is uniquely yours, and I’m honored to help guide you through this decision. If you have any questions about either pump or want to share your own experience, please leave a comment below—I read and respond to every single one!

Comparison Summary