• FreeOpen Source
    • Windows
    • Linux
    • Online
    • MySQL Community Edition
    • Self-Hosted
    • PHP
    • Cloudron
    osTicket is a widely-used open source support ticket system. It seamlessly integrates inquiries created via email, phone and web-based forms into a simple easy-to-use multi-user web interface.
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  1. tawk.to is a live chat app that lets you monitor and chat with visitors on your website or from a customizable page. In order to remove advertisements or apply your own branding, you have to subscribe to the paid subscription service for $15/month or $144/year.
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  2. Freshdesk is an award-winning, online help desk software that allows you to support customers over email, phone, the web or even through Twitter and your company's Facebook page.
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  3. ProProfs Help Desk Software is a feature-rich issue tracking software that enables online businesses to track all customer issues, requests, and bugs. Offer timely response to your customers through child tickets.
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  4. Zammad is a web based open source helpdesk/customer support system with many features to manage customer communication via several channels like telephone, Facebook, Twitter, chat and e-mails.
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  5. Nolt is a beautiful, collaborative place for all your user requests – no more outdated spreadsheets or chaotic Trello boards. Give your customers a voice and gain priceless insights. Everything for just $25 board/month.
  6. ProProfs Knowledge Base is knowledge management software used to create highly-searchable online FAQ’s to improve customer service and reduce tickets.
  7. EspoCRM is an Open Source CRM (Customer Relationship Management) software that allows you to see, enter and evaluate all your company relationships regardless of the type. People, companies, projects or opportunities. Written in PHP and JavaScript.
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  8. ProProfs Chat is an online live chat software that allows businesses to offer instant support to their customers and engage with their website visitors.
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  9. Simply is the CRM that you will actually use! It has all the features you can wish for, is designed for humans - and we are offering free support in your local language 24/7.
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  10. Open source alternative to Intercom, Zendesk, Drift, Crisp, etc.
  11. ((OTRS)) Community Edition is the free, open source version of OTRS, a ticketing and process automation suite used by service teams to improve communication and customer satisfaction.

    Discontinued

    From https://community.otrs.com :

    With the release of OTRS 8 at the end of March 2020, ((OTRS)) Community Edition 6 reached its end of support and maintenance. As of January 1, 2021, ((OTRS)) Community Edition 6 will not receive any further security updates.

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  12. On-demand CRM (Customer Relationship Management) services for managing organization-wide sales, marketing, customer support, and orders.
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  13. Intercom shows you who is using your product (the user's region, browser, local time etc.) and makes it easy to personally communicate with them through targeted, behavior-driven email and in-app messages.
  14. Free open source Zendesk & Help Scout alternative: help desk, shared mailbox, email management and analytics. FreeScout is a pure PHP7+MySQL application which can be easily deployed even on a shared hosting.