If you've been searching for invisible hearing aids, you've likely come across three popular completely-in-canal (CIC) options: the Audicus Mini 2, Eargo 8 and Sony CRE-C20.

These discreet hearing aids are designed to sit deep inside the ear canal, making them much less visible than traditional behind-the-ear devices. For many adults with mild to moderate hearing loss, CIC hearing aids are an appealing option that offers a combination of discreetness, comfort and sound performance. 

In this guide, we'll review the pros and cons of CIC hearing aids and compare popular options like Audicus Mini 2, Eargo 8 and Sony CRE-C20. Keep reading to compare the costs, technology, battery life, audiologist support and overall value to help you decide if CIC hearing aids are right for you and if so, which product may be best for you.

What Are CIC Hearing Aids?

CIC stands for "Completely-in-Canal." CIC hearing aids are designed to be tiny enough to fit completely in your ear canal and sit deeper in the ear than many traditional behind-the-ear hearing aids.

Because they are so small and discreet, CIC hearing aids are often referred to as invisible hearing aids or nearly invisible hearing aids. CIC hearing aids are typically recommended for adults with mild to moderate hearing loss who prioritize cosmetics and comfort. 

Why some people prefer CIC hearing aids:

• Discreet appearance
• Comfortable fit
• Natural sound quality
• Reduced wind noise
• No visible tubing or external hardware
• Compatible with glasses and over-the-ear headphones

However, the small size that makes invisible hearing aids such a discreet option is also the reason behind some of the tradeoffs. In order to decide whether CIC hearing aids are a good option for you, it’s important to understand both the pros and cons of invisible hearing aids.  

Pros of CIC Invisible Hearing Aids

Virtually Invisible Hearing Aids

Probably the top reason many people choose CIC hearing aids is discretion. Many first-time hearing aid wearers may worry about whether people will notice they are wearing hearing aids. Because CIC hearing aids sit deep inside the ear canal and do not have any external hardware, they are a popular choice to help new hearing aid wearers feel more comfortable and confident.

Comfortable, Secure Fit

Besides discretion, one of the main reasons people choose a completely-in-canal (CIC) hearing aid is comfort. Because CIC hearing aids sit deeper within the ear canal, many wearers find they feel secure and stable throughout the day. Many people appreciate how comfortable and secure invisible hearing aids feel during long workdays, exercise, travel, and social events. Once properly fitted, CIC hearing aids can become easy to forget you're even wearing, making them a popular choice for adults seeking a low-profile hearing solution.

Lightweight, Unobstructed Design

Unlike behind-the-ear hearing aids, CIC hearing aids don't have external components resting behind the ear or tubing running into the ear canal. This compact, lightweight design can make CIC hearing aids feel less intrusive than larger hearing aid styles and an appealing option for active lifestyles and everyday comfort.

The hidden fit also means there is less chance of interference from:

• Glasses
• Sunglasses
• Hats and helmets
• Over-the-ear headphones
• Face masks
• Hair and hairstyles

Recharge vs Replacing Disposable Batteries

Many modern CIC hearing aids are designed with rechargeable batteries so you’ll never have to worry about purchasing and replacing tiny, disposable hearing aid batteries. Instead of keeping spare batteries on hand and changing them every few days, you simply place your hearing aids in their charging case overnight and start the next day with a full charge. (Just like you would with your phone!) For many people, rechargeable hearing aids feel easier to build into their routine and maintain day-to-day. 

Disposable hearing aid batteries are very small and can be difficult to replace so rechargeable CIC hearing aids can be especially beneficial for: 

• People with arthritis or dexterity challenges who find battery changes difficult
• Frequent travelers who don't want to carry spare batteries 
• Busy professionals looking for a more convenient routine 
• Anyone who prefers a lower-maintenance hearing solution

Cons of CIC Invisible Hearing Aids

No Bluetooth Streaming

One of the biggest tradeoffs with CIC hearing aids is the lack of direct Bluetooth audio streaming. Because these devices are so small, there is not enough space for the additional components required to stream calls, music and television audio directly to the hearing aids. If Bluetooth streaming is a top priority for you, a Receiver-in-Canal (RIC) hearing aid may be a better option.

Smaller Controls

The small, compact design is great for discreetness but leaves little room for external buttons directly on the device. Most CIC hearing aids rely on mobile apps or smart, auto features to adjust volume or switch programs. If adjusting the volume without an app is a deal breaker for you, a Receiver-in-Canal (RIC) hearing aid might be a better option.

Not Ideal for Severe Hearing Loss

CIC hearing aids are generally best suited for mild to moderate hearing loss. People with more severe hearing loss often require larger hearing aid styles that can deliver even greater amplification and more advanced features.

Audicus Mini 2, Eargo 8 or Sony CRE-C20: Which Invisible Hearing Aid Is Right for You?

While all completely-in-canal (CIC) hearing aids offer a discreet, comfortable design, they aren't all built the same. If you've decided that a CIC hearing aid is the right style for your needs, the next step is comparing your options. 

Choosing a CIC hearing aid isn't just about finding the smallest device. Although many invisible hearing aids look similar on the outside, they can vary considerably in how they process sound, how long they last on a single charge and the level of support included after purchase. Understanding these differences can help you choose the hearing aid that best matches your hearing loss, lifestyle and preferences.

To help you narrow down your options, we've compared three popular invisible hearing aids: the Audicus Mini 2, Eargo 8 and Sony CRE-C20. We’ll take a closer look at their features and differences to be aware of to help you find the CIC hearing aids that best fit your hearing needs, budget and lifestyle.

How Much Do Invisible Hearing Aids Cost?

The price of invisible hearing aids can vary significantly but it’s important to consider more than just the upfront cost. When buying hearing aids you’ll want to review what's included such as professional programming, length of trial periods, warranty coverage, flexible financing options and ongoing support.

Eargo 8 costs the most at $2,699 per pair and includes self-fitting technology, financing options and proprietary Eargo design. At $2,498 per pair, the Audicus Mini 2 costs slightly less than the Eargo 8 and includes professional custom-programming, a 100-day trial, financing options and the flexibility to purchase a single hearing aid if only one ear requires treatment.

While the Sony CRE-C20 launched at a significantly lower price point of $999.99, the product has since been discontinued so future warranty support and product availability are less certain.

Another key difference is the trial period. Audicus offers a 100-day risk-free trial, compared to 45 days for both Eargo and Sony. A longer trial gives wearers more time to adjust to hearing aids. (For first-time hearing aid wearers, the adjustment process can take several weeks because our brains need time to adapt to hearing sounds differently.) For shoppers researching the Sony CRE-C20, it's worth noting that the Sony CRE-C20 has been discontinued. While limited inventory may still be available through select retailers, consumers looking for long-term product support and warranty coverage may prefer a currently supported device.

When evaluating overall value and deciding which invisible hearing aid is right for you, you’ll want to consider more than just the upfront cost. The trial period, availability of ongoing support and future adjustments are all important factors.

CIC Invisible Hearing Aids: Custom-Programmed vs. Self-Fitting

All three of these models offer a nearly invisible design and rechargeable batteries. However, they differ in several important ways including cost, how they're programmed and how long you can trial them. 

One of the biggest differences is that the Audicus Mini 2 is professionally custom-programmed by licensed audiologists and both the Eargo 8 and Sony CRE-C20 are designed to be self-fitting hearing aids. While Eargo 8 is designed to be self-fitting, the Eargo website states users can get “all the autonomy you want and support from hearing aid experts when you need it.”

Self-fitting technology has improved significantly in recent years but professionally custom-programmed hearing aids often provide a better hearing experience, especially for first-time hearing aid wearers or those with more complex hearing needs.

Who manufactures the Audicus Mini 2, Eargo 8 and Sony CRE-C20?

The Audicus Mini 2 is built on technology from WS Audiology, one of the world's largest hearing aid manufacturers and the parent company behind brands like Rexton, Widex, Signia and Sony hearing aids. The Eargo 8 uses Eargo’s own proprietary hearing aid technology developed in-house for all Eargo products. Sony CRE-C20 was also built using WS Audiology's Signia Silk platform but in April 2026 a WS Audiology spokesperson confirmed WS Audiology and Sony mutually agreed against renewing their 2022 agreement. 

Battery Life + Charging: Audicus Mini 2, Eargo 8 and Sony CRE-C20

While there are a few CIC hearing aids that still use disposable zinc-air batteries, most modern CIC hearing aids are rechargeable, providing a simpler, more convenient alternative to disposable batteries. Instead of replacing tiny batteries every few days, you simply place your hearing aids in their charging case overnight and they're ready to go the next morning. The Audicus Mini 2, Eargo 8 and the Sony CRE-C20 all have rechargeable batteries but there are a few differences worth noting when it comes to the charging time and battery life. 

The Audicus Mini 2 offers up to 28 hours of battery life on a single charge and a portable charging case that stores approximately 4 on-the-go charges making it well suited for long workdays, travel or extended time away from home. The Audicus Mini 2 also includes a quick-charge feature that conveniently provides 6 hours of listening from just 30 minutes of charging. 

The Sony CRE-C20 also delivers up to 28 hours of battery life, although we could not find any information published about a quick-charge feature. Eargo 8 provides up to 16 hours of battery life and includes a compact wireless charging case that stores approximately 2 weeks of on-the-go charges.

If battery life is one of your top priorities, the Audicus Mini 2 and Sony CRE-C20 offer longer listening time between charges than Eargo 8. (Note: The Sony CRE-C20 has been discontinued but may still be available at some retailers with stock remaining.)

Smart Features: Audicus Mini 2, Eargo 8 and Sony CRE-C20

One tradeoff shared by all three devices is the lack of Bluetooth streaming for music and phone calls. Because completely-in-canal hearing aids are significantly smaller than behind-the-ear models, there simply isn't enough room for the additional antennas and components required for direct Bluetooth audio streaming.

CIC hearing aids generally don't support Bluetooth but modern invisible hearing aids still offer many smart technology features and sophisticated automatic sound processing. The Audicus Mini 2, Eargo 8 and the Sony CRE-C20 all feature automatic environment detection.

Auto environment detection is a smart technology that continuously analyzes your surroundings and auto-adjusts settings like volume, speech clarity and noise reduction to help optimize the listening experience without requiring manual changes. Each model also includes digital feedback suppression which can reduce any whistling sounds that can sometimes happen, especially if hearing aids aren’t properly inserted. 

The Audicus Mini 2 offers an additional advantage with optional custom listening programs created by audiologists. Rather than relying solely on preset programs, custom programs can be personalized to your listening preferences, lifestyle and frequent environments.

Sound Quality: Audicus Mini 2, Eargo 8 and Sony CRE-C20

All hearing aids amplify sound but it’s the technology inside that determines how naturally your hearing aids process speech, background noise and adjust listening environments. One hearing aid specification you may see mentioned frequently are processing channels. 

Processing channels are essentially individual tuning ‘channels’ that enable hearing aids to adjust amplification across different sound frequencies. In general, more processing channels allow for more precise customization, especially if your hearing loss varies significantly across pitches.

The Audicus Mini 2 includes 16 processing channels while the Eargo 8 includes 8 processing channels. Sony has not publicly disclosed the number of processing channels used in the CRE-C20.

Another aspect to consider when deciding on a CIC hearing aid is how they handle listening environments. The Eargo 8 includes 4 preset listening environments which users can switch between in the app. These presets are designed for common situations like restaurants, outdoor settings, TV watching or quiet conversations.

The Audicus Mini 2 comes with 3 preset listening environments with the option to add up to 6 additional customized listening environments. You’ll want to consider more than just the technical specs but understanding the technology is an important part of the equation when deciding which CIC hearing aid will produce the best sound quality for your specific hearing needs.

Best Invisible Hearing Aid Reviews: Audicus Mini 2, Eargo 8 and Sony CRE-C20

Hearing loss is highly personal but customer reviews can provide some insight into everything from the setup process, day-to-day comfort to customer support and overall satisfaction. Both Audicus and Eargo have earned high marks from independent organizations like the National Council on Aging (NCOA) and customer review platforms like ConsumerAffairs.

National Council on Aging: Invisible Hearing Aid Reviews

Audicus = 9.6/10

The National Council on Aging praised Audicus for offering a personalized hearing care experience that bridges the gap between traditional prescription hearing aids and over-the-counter devices. Reviewers highlighted the ability to upload or take a hearing test online, allowing licensed audiologists to pre-program each hearing aid before it arrives. NCOA also recognized Audicus for its responsive customer support, calling it "some of the best customer service in the industry." 

Eargo = 9.5/10

The NCOA highlighted Eargo's technology-first approach, noting that its smartphone app makes setup and ongoing adjustments straightforward for users. The review also acknowledged that Eargo's technology is comparable to many prescription hearing aids while maintaining a more affordable price point.

ConsumerAffairs: Invisible Hearing Aid Reviews

Audicus = 4.5/5

Audicus customers who left reviews on ConsumerAffairs frequently praise the company's knowledgeable audiologists, responsive customer service and personalized hearing care experience. Many also highlight the sound quality, comfort and convenience of receiving remote programming adjustments and ongoing support without visiting a hearing clinic.

Eargo = 2.7/5

Eargo customers who left reviews on ConsumerAffairs frequently praise the hearing aids' discreet design, comfortable fit and easy-to-use self-fitting app. Many also highlight the sound quality and overall user experience, while some mention concerns about battery longevity, repair costs and replacement pricing over time.

Trustpilot: Invisible Hearing Aid Reviews

Audicus = 4.3/5

According to customer reviews on Trustpilot, Audicus is frequently praised for its responsive customer service, knowledgeable support team and overall value. Many reviewers also mention the convenience of remote hearing care, personalized programming and prompt assistance with hearing aid adjustments and questions.

Eargo = 4.2/5

According to customer reviews on Trustpilot, Eargo is frequently praised for its discreet design, sound quality and easy-to-use self-fitting experience. Many reviewers also commend the company's customer support, while some mention concerns about battery longevity, durability and repair or replacement costs over time.

*Sony CRE-C20 reviews were not included because the product has been discontinued. Also customer reviews for Sony on platforms like Trustpilot generally cover a wide range of consumer electronics vs hearing aids specifically. 

The best invisible hearing aid isn't necessarily the one with the most features; it's the one that best matches your hearing loss, lifestyle and preferences. Whether you choose a professionally programmed or self-fitting hearing aid, taking the time to compare sound quality, comfort, battery life and overall support can help you make a more confident decision and find a hearing solution you'll enjoy for years to come.