ProofHQ

ProofHQ is one of the most popular online proofing resources available. Upload over 50 file types, provide access to your clients and watch them make revisions and decisions in real time.

Cage

Even though Cage is still currently in its BETA version, it offers a great platform for client revisions. It’s as simple as uploading the artwork, sharing the link, and collaborating online. Team collaboration is streamlined by threaded design notes and the ability to provide input on specific aspects of the design. Simply click the element you want to comment on and add a note.

Upshot

Upshot has a lot of great features. In addition to the basics, they offer the ability to brand your account, view comments on your mobile phone, turn client comments into a to-do list and it even gives clients the ability to sign off on mock-ups in one click.

Notebox

Notebox has a very simple, clean layout that makes navigating through your account very easy. Clients can visit the link (without having to sign in or download any files) and offer feedback; once they have made a comment you will be notified via email. You can then review all of the notes on the design itself or view them in their quickview option.

Notable

This app provides a lot of room to customize the process for what works for you and your clients. Control who sees the mock-ups and what exactly they can see, upload your proofs directly from the web, Photoshop, iPhone/iPad, screenshots, or a bulk image upload and even pose questions directly on the artwork for the clients to respond to.