What are some alternatives?
When comparing Async and Proof HQ, you can also consider the following products
Slack - A messaging app for teams who see through the Earth!
Ziflow - Helping creative marketing teams go from chaos to compliance with smart, simple enterprise online proofing.
Axosoft - Axosoft is proprietary software for project management.
Workgroups DaVinci - Project management and workflow automation software for marketing and creative teams.
FireRTC - FireRTC is the easiest way to call from your computer for free
ProofQuick - ProofQuick is the best online proofing solution for designers, advertisers and professional photographers.