Eargo, formerly known as Aria Innovations, is a direct-to-consumer hearing aid company that manufactures an invisible in the canal hearing aid that was actually designed by an ear-nose-throat (ENT) doctor.

Eargo targets people with mild to moderate high-frequency hearing loss who do not have access to or do not want to visit a hearing healthcare professional.

Eargo was founded in 2010 by Florent Michel, his son Raphael Michel, and Daniel Shen. The company is headquartered in San Jose, California with an additional office in Nashville, Tennessee. Eargo began selling their hearing aids in 2015.

Eargo's hearing aids are generally smaller and less visible than traditional in-ear devices and were inspired in their design by a fishing fly. Each unit is also rechargeable.

Eargo hearing aids are certified Class 1 medical devices. Their design is modeled after the standard fishing fly, with a small speaker surrounded by medical-grade silicone fibers (for which the company uses the trademark Flexi Fibers).


Eargo's devices come in two sizes and are pre-programmed with four standard profiles. To change the setting, wearers double-tap their ear, and an acoustic switch changes the sound profile. The settings for the devices in each ear can be changed independently.


Eargo is backed by leading investors including NEA, Maveron, Crosslink Capital, Birchmere Ventures, Montage Ventures, Red Sea Ventures among others.



  • Year founded: 2010
  • Funding Info: $135.6M in 4 Funding Rounds (Last Funding Type: Series D)
  • Yearly Revenue: $20M-$50M (2018)
  • Employee Size: 201-500
  • Business Valuation: NA
  • City/Town: San Jose
  • State: California
  • Country: United States
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