| WWE No Mercy | |
|---|---|
 NXT No Mercy logo used since 2023 | |
| Promotion | WWE |
| Brands | Raw (2002, 2007–2008, 2017) SmackDown (2002–2008, 2016) ECW (2007–2008) NXT (2023–present) |
| Other names | NXT No Mercy (2023–present) |
| First event | 1999 (UK) |
WWE No Mercy, also known as NXT No Mercy since 2023, is a professional wrestling event produced by WWE, a professional wrestling promotion based in Connecticut. The first No Mercy was held on May 16, 1999, in Manchester, England, and was the only No Mercy event produced in the United Kingdom. A second No Mercy was then held in October that year in Cleveland, Ohio, United States. Beginning with this second event, No Mercy became the annual October pay-per-view (PPV) until 2008. The event was then discontinued and replaced by Hell in a Cell in 2009. After eight years, No Mercy was reinstated in October 2016. However, No Mercy was again discontinued after the September 2017 event, as WWE reduced the amount of yearly PPVs held after they had ended the production of brand-exclusive PPVs following WrestleMania 34 in 2018. In 2023, WWE again revived the event, this time for its developmental brand, NXT, in September.
The first four events were held when the promotion was still called the World Wrestling Federation (WWF). In May 2002, the promotion was renamed to World Wrestling Entertainment (WWE), and in 2011, the "WWE" name became an orphaned initialism for the promotion. During the first brand extension, No Mercy was held exclusively for the SmackDown brand from 2003 to 2006. When the event was reinstated for the second brand extension in 2016, it was again SmackDown-exclusive and was then Raw-exclusive in 2017. It then became exclusive for NXT in 2023. In addition to traditional PPV, the 2016 and 2017 events were livestreamed on the WWE Network, and then just Peacock and the WWE Network beginning in 2023.