Zenni created theme glasses through collaborations with professional gamers, sportspeople, the designer Iris Apfel and the actress Rashida Jones.

In 2020, it purchased a building in Obetz, Ohio, to act as a lab that molded lenses for frames employed nearly 100 people there by the end of 2022.

[10][11] At the beginning of the 2018–19 NBA season, Zenni's name started being featured on the left side of the Chicago Bulls jersey.

The company inked an agreement with the NBA team that lasted five years, allowing it to become the first brand featured on the Bulls' jersey patch.

[12] The company released an ad during Super Bowl LIV in February 2020 that featured George Kittle, a San Francisco 49ers tight end.

[7] A number of customers who visited their website after seeing the commercial encountered a message that eyeglasses deliveries would be delayed for between three and four weeks owing to the government's required suspension of factory work in response to the COVID-19 pandemic in mainland China.

[7] In 2013, Zenni had average daily sales of 3,500 glasses, which the San Francisco Chronicle said made it "one of the largest online purveyors of eyewear in the world".

[20] The company offers prescription safety glasses marketed for people studying science and collaborated with Rashida Jones for a line she organizes.

[20] It distributes some money made from sales of that collection, "ReMakes by Zenni", to One Percent for the Planet and the Wyland Foundation, two non-profit organizations focused on the environment.

[20] The company's blog features listicles and articles that discuss their products, arranging them by popular-culture occurrences and various subject matter such as Harry Potter houses and the zodiac.

[23] Zenni tracks their users' frame choices in an Oracle database to give the company a better idea of the inventory it needs to maintain.

[29] Columnist Mary Hunt said in 2022 that "while in the past Zenni has fallen short for its customer service, the company has really stepped it up in recent years".

"[32] Los Angeles Times consumer columnist David Lazarus wrote in 2019 of Zenni, "The more you rely on complex lenses, premium coatings and prisms, the more of a risk you'll face that things might not work out."

After receiving the glasses, Lazarus found that the frames "had looked pretty cool online [but] appeared a bit cheaper in person".