details. Instant Responders: Signpost's Instant Responders send a personalized message to customers who reach out on platforms like Angi, Thumbtack, or Facebook. AI SMS: Signpost's AI SMS responds to incoming leads, qualifies their request, and keeps the conversation moving, even after-hours or on the job. Messaging Hub: Signpost's Messaging Hub brings every customer conversation, including inbound calls, texts, and inquiries on platforms like Angi and Thumbtack, into a single inbox.