Typically design tools that are being used by industries/companies world wide are accepted such as: Adobe Photoshop, Adobe XD, Sketch or Illustrator. Topcoder right now does not allow open source tools such as GIMP or Affinity Designer when competing in design challenges.
You should ask the Support Team for help via email and cc the challenge’s copilot/PM in the process.
Many clients desire to keep their competitions private. They also may not want to influence the designer’s creativity, which is why sometimes it is the reason we hide their company’s name in challenges.
Typically design tools that are being used by industries/companies world wide are accepted such as: Adobe Photoshop, Adobe XD, Sketch or Illustrator. Topcoder right now does not allow open source tools such as GIMP or Affinity Designer when competing in design challenges.