Field notes on AI-era growth, deliverability, voice, and messaging for developers and teams building on Orbit by Devotel.
A buyer-facing total-cost model for cascaded AI voice agents that prices each component — speech-to-text, the language model, and text-to-speech — separately, ties turn latency to burned minutes, and gives you the formulas to rerun the math on any vendor quote.
Every caller turn pays for speech-to-text, the language model, and text-to-speech twice — once in milliseconds, once in dollars. A per-component budget for both, plus how Devotel Orbit's model presets ship annotated with the latency, cost, and quality numbers of each.
The fully-loaded cost of a human talk-minute versus the four-component AI voice-agent minute, a break-even table by interaction volume and complexity tier, and the hybrid escalation model that turns per-minute math into a defensible TCO comparison.
The four-bill problem (Programmable Voice + Messaging + SendGrid + Segment) asserted on /compare/twilio, walked through with arithmetic: a worked 50,000-message-month scenario priced on published rates, the hidden line items that ride on top, a footnoted TCO table, and an honest map of when the assembled Twilio stack still wins.
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