交互式的消息系统：RapidPro
RapidPro 是一个开源的平台允许任何人用来构建交互式的消息系统，使用非常简单的可视化界面进行管理操作。
特性：
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Contact and Message management
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Visual interface to build messaging “flows”
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Ability to collect open ended, numerical, categorical, time or geographic input
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Ability to build multi step questionnaires that interlink, contain skip logic control contact group memberships
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Ability to schedule messages or flows based on time, keywords, missed or incoming calls
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Ability to build individualized time based campaigns, such as those used for maternity reminders
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Powerful analytics framework to let you quickly gain insight into your data
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Integration with Twilio, Nexmo, Kannel and many other messaging providers
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Integration with 推ter to allow for direct messaging interactions
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Integration with Twilio and Verboice allowing for IVR based flows to allow for voice prompting and either touch tone or recorded responses
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Scalable architecture, able to handle millions of messages across thousands of organizations
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Powerful API to allow integrating your own solution or building on top of the data you collect using RapidPro