Online proofing has come a long way in the 12 years since Mat and I launched ProofHQ back in 2008 and now Ziflow in 2017.
Initially, ProofHQ only supported a handful of static file types. Ziflow now supports the review and approval of over 1,200 media and files types, including static designs/documents (PDF, images, Word, etc.), audio, video, websites, and rich media packages like banners and animated GIFs.
Despite the diversification of campaign media types, one file type still reigns supreme in marketing review and approval to this day: PDFs.