“The Monster” by Eminem (featuring Rihanna) was written by a team of songwriters, not just Eminem. The officially credited writers are:

  • Eminem (Marshall Mathers)
  • Rihanna (Robyn Fenty)
  • Bebe Rexha
  • Jon Bellion
  • Aalias
  • Maki Athanasiou
  • Frequency (who also produced the track)

So if you’re asking “who wrote ‘Monster’ by Eminem,” the accurate answer is that it was co-written by this group, with Frequency as the main producer.