On September 17, 2020, characters from The Boys appeared in an episode of Death Battle! (sponsored by Prime Video), alongside a breakdown video, which was released on YouTube.
On October 3, 2020, Kripke confirmed that the in-universe pornographic superhero film scenes briefly glimpsed in the second season The Boys episode "Butcher, Baker, Candlestick Maker" had been produced in full, expressing interest in releasing them under the name Supe Porn to the fictional website of the same name (formerly registered to Sony Pictures), as well as supposedly requesting Rogen, Goldberg, Starr, and followers of his Twitter page to join him in petitioning Amazon Prime Video and Amazon Studios to allow the potential web series to be uploaded. In June 2022, a fictional online "storefront" was added to the website, containing a collection of supe-inspired sex toys. At the bottom of the website, there is a message stating its contents are "for entertainment purpose only" and products are "not for sale".
Beginning June 4, 2021, full renditions of in-universe music videos have been released under the Voughtify brand, including "Never Truly Vanish" by Starlight, two renditions of "Faster" by A-Train, "Chimps Don't Cry" by Crimson Countess, "Rock My Kiss" by Supersonic's boy band Super-Sweet, "Let's Put the Christ Back in Christmas" performed by the company of Vought on Ice, "Up Where We Belong" as covered by Firecracker and The Deep, "See Something, Say Something" from The Avenue V Christmas Special, and "Raise Him Up" by Oh Father. Additional videos include Super-Sweet's "License to Drive" presented using the Voughtify interface, as well as a 2022 Voughtify Recapped hosted by A-Train.
On October 7, 2021, canned water brand Liquid Death, known for using dark humor and satire in their advertising, began a multi-year cross-promotion featuring The Deep as their "Chief Sustainability Associate." In-universe public service announcements were produced featuring The Deep promoting unhealthy habits, leading to Liquid Death repeatedly removing The Deep from the position. After multiple attempts at collaboration, Liquid Death has officially "parted ways" with The Deep. Following the show's penultimate episode, a new campaign was launched featuring Ashley Barrett as the brand's sparkling energy drink ambassador.
Since February 9, 2022, miscellaneous in-universe content has been posted to the show's social media pages, corresponding to key moments within both The Boys and Gen V. Although several examples have been seen within the show itself in an abridged format, many were also created for online distribution. Online content includes film advertisements, clips from various films and television shows, promotional content for brands and television shows, social media posts from characters within the show, and official Vought public service announcements and "In Memoriam" tributes for fallen employees. Notably, Soldier Boy's fictional appearance on Solid Gold has accumulated over 20 million views on YouTube due to his rendition of "Rapture" by Blondie becoming a viral TikTok audio.
In the second episode of season five, members of teenage superhero team Teenage Kix are seen wearing a QR code on their costumes. Scanning the code leads to a previously-released promotional short featuring the characters.
Ahead of the season three premiere, the series released a faux current affairs digital series, Seven on 7 with Cameron Coleman, in the form of in-universe news reports from the Vought News Network—a parody of CNN and Fox News—uploaded on the official Vought International YouTube channel. Each video segment contains seven stories that tease events in upcoming episodes and introduce new cast members. Acting as an interlude between seasons two and three, the video segments were released on the seventh day of each month over a period of seven months starting on July 7, 2021, and concluding on January 7, 2022. Matthew Edison, who portrays anchor Cameron Coleman—a parody of Fox News' Tucker Carlson—also makes appearances in the third and fourth seasons of the main series.
An additional September 28, 2022 episode of Seven on 7 was used as cross-promotion with the G-Fuel energy drink brand to promote their "Compound V" tie-in flavor.
On June 8, 2022, an audiobook/podcast special, titled The Boys: Deeper and Deeper, was released as an Audible Original. The special takes the form of an in-universe interview with The Deep and his wife, Cassandra (Katy Breier), about Deep's memoir, titled Deeper, and the events in his life that are described in the memoir.
On July 10, 2023, Activision announced a collaboration between the Call of Duty video game franchise and The Boys, which features the addition of Black Noir, Homelander, and Starlight as playable characters in Call of Duty: Modern Warfare II and Call of Duty: Warzone. Warzone also features map updates that include adverts of The Seven, as well as a Temp V field upgrade that allows players to use one of four superpowers, based on other characters in the series. A trailer for the collaboration was released on the Vought International YouTube channel, which depicts it as taking place in-universe prior to the end of the third season. On December 5, 2023, a second collaboration was announced for Call of Duty: Modern Warfare III, with A-Train and Firecracker joining the playable roster as part of the game's first seasonal content update.
On July 21, 2023, Homelander appeared as a playable character in the video game Mortal Kombat 1, modeled after Starr and voiced by Jake Green. He is available via the "Kombat Pack" DLC.
In October 2023 and June 2024, web browser Opera GX partnered with Gen V and The Boys respectively, releasing Vought-branded browser modifications to advertise upcoming seasons. Promotional videos were created for both.
On April 9, 2026, a full 15-minute episode of the fictional Manhandled podcast was released, hosted by The Deep and Black Noir II. An accompanying advertisement for men's grooming products under the Manhandled brand, parodying Manscaped, was released on April 11.
