AI-Powered Support Messaging Platform Development

I'm seeking an experienced developer or team to build a comprehensive support messaging platform for both web and mobile. Similar to Gleap and Intercom.

Key Features:
- Chatbot powered by Natural Language Processing.
- User-defined workflows including:
- Automated Responses
- User Assignment
- Escalation Protocols
- AI bot to handle FAQs sourced from our website and knowledge base.
- Integrated knowledge base and reporting functionalities.

Requirements:
- Proficiency in building cross-platform applications.
- Strong expertise in Natural Language Processing and chatbot development.
- Experience in creating customizable workflows.
- Familiarity with knowledge base integration and reporting tools.

Please assist in finding and utilizing open-source code to facilitate this build.