Synonyms for To sum up:

• adv.

  •lastly/last (adverb)
  • behind,
  • after,
  • in conclusion,
  • ultimately,
  • finally.

• Other synonyms:

  •Other relevant words:
  • concisely,
  • bluntly,
  • curtly,
  • tersely,
  • succinctly,
  • in short,
  • brief,
  • in a nutshell,
  • in sum,
  • briefly,
  • in summary,
  • in brief.