What is an open source ticketing system?

Which software is used for ticketing?

Email Ticketing Software Features Price Multi-Channel Support --------------------------------- --------- --------------------- ProProfs Help Desk $10/month Y Freshdesk $15/month Y Zendesk $49/month Y Zoho Desk $12/month Y

What is osTicket system?

osTicket is an open source support ticket system. It seamlessly routes inquiries created via email, web-forms and phone calls into a simple, easy-to-use, multi-user, web-based customer support platform.