There is a Trello board detailing the exact status for designers as well as giving you the option to vote for unsupported designers or suggest new designers.

Designer Wish List

Below is a quick summary (Updated 2020-01-30)

Well supported (Almost all charts work. But there can still be a few that doesn't)

  • Heaven and Earth design
  • Artecy
  • jan hicks creates!
  • Charting Creations
  • Paine free crafts
  • Tilton crafts
  • Pic2Pat
  • WinStitch/MacStitch (Export tutorial)
  • The Cross Stitch Studio
  • Golden Kite

Somewhat supported (Lots of charts work but no promises)

  • Long Dog Samplers
  • Gecko Rouge
  • Cross Stitch Collectibles
  • Mystic Stitch
  • Fox and Teacup
  • Cross Stitch 4 Everyone
  • Unconventional X stitch