Customer portal / forum
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Discourse
Discourse – Civilized Discussion
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Teamwork Desk
Teamwork.com: Project Management: Help Desk & Chat Software
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SupportBee
Ticketing System – Free Support Ticket Software by SupportBee
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Tender Support
Tender Support — Better Customer Support Software: Help Desk …
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Get Satisfaction
Get Satisfaction
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Amazon Connect
A self-service, cloud-based call center