Chert

An API and workflow layer for sending, receiving, routing, and observing real iMessage conversations at scale, solving low reply rates in cold outbound by enabling trusted, personalized communication. It targets marketing and sales teams at enterprises who want to book meetings and engage prospects via iMessage. Unlike SMS pipelines that appear automated, it delivers peer-to-peer iMessage threads with blue bubbles, read receipts, tapbacks, and fallback to SMS or RCS, maintaining native trust.

Key features

• Blue-bubble threads from verified numbers
• Typing, reactions, and reply context intact
• Multi-recipient threads with named senders
• Fallback to SMS or RCS when off iMessage
• Attach files, PDFs, and links in thread
• Delivery receipts and webhook-ready status
• Phone number pools and reply routing
• Audit trails and workflow primitives