If you can't beat them, join them

If you can't beat 'em, join 'em

If you can't defeat your opponent, then you might as well work alongside them or do what they do. A: "I thought you said you'd never join social media." B: "Yeah, but everybody else has, so if you can't beat 'em, join 'em, I guess."
See also: beat, if, join
Farlex Dictionary of Idioms.

If you can't beat them, join them.

 and If you can't lick 'em, join 'em.
Prov. If you have to give up fighting some group because you can't win, band together with them. (The version with lick is informal.) Jill: I just got a kitten. Jane: I can't believe it! You used to hatepeople who owned cats. Jill: If you can't beat them, join them. Alan: I hear you're a Republican now. Fred: Yeah, I figured, if you can't lick 'em, join 'em.
See also: beat, if, join
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

if you can't beat them, join them

if you are unable to outdo rivals in some endeavour, you might as well cooperate with them and gain whatever advantage possible by doing so. humorous .
See also: beat, if, join
Farlex Partner Idioms Dictionary

if you can’t ˈbeat them, ˈjoin them

(saying) if you cannot defeat somebody or be as successful as they are, then it is more sensible to join them in what they are doing and perhaps get some advantage for yourself by doing so: Everybody else seems to be leaving early today, so I think I will too. After all, if you can’t beat ’em, join ’em!
See also: beat, if, join
Farlex Partner Idioms Dictionary
See also:
  • If you can't beat 'em, join 'em
  • If you can't lick 'em, join 'em
  • be/get in on something
  • get in on
  • have (something) to spare
  • have to spare
  • come in on the ground floor
  • be in on the ground floor
  • be, come, get, etc. in on the ground floor
  • goodnight Vienna