Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
From the blog
Referral programs convert at 25-50% but humans never ask. AI voice asks every NPS-9-or-10 customer in the moment of joy and books the warm intro. Here is the referral build.
30-50% of agent utterances are static — greetings, confirmations, holds. Pre-render once, cache at CloudFront edge, and skip TTS on those turns. Save 100-300ms and slash TTS spend.
Segment turns 700+ source events into one customer timeline. We wire Twilio Voice Insights + AI agent events into Segment, build CallSphere's revenue-attributed call dashboard, and avoid the PHI traps.
Replay attacks (recording + playback) are the easiest voice-bio bypass — and the cheapest. Active challenge-response plus passive spectral analysis cuts attack success below 0.5% in 2026 production.
60% of 2026 production RAG projects use both fine-tuning and retrieval together. Domain embeddings boost recall 7%+ on as little as 6.3K samples — and Matryoshka representations cut storage 6x. Here's the recipe used in legal, healthcare, and salon stacks.
Hotels using AI voice for personalized engagement see a 74% upsell lift and 12% RevPAR increase. Here is the concierge upsell agent build, including OneRoof's 10-specialist orchestration.
78% of buyers go with the agent who responds first and AI-first prequal stacks close 3.4x more deals per lead. Here is the 2026 chat playbook for instant buyer prequalification.
Q1 2026 voice AI deals tallied $559M+ across 10 rounds — ElevenLabs $500M Series D at $11B, Deepgram $130M Series C, Gradium $70M seed. Real dollar amounts and what they signal.
How MIC's Telecoms Numbering Plan, the all-IP PSTN completed in January 2025, the 050/0120/0800 ranges, and the new 060 prefix rollout from July 2026 shape AI voice agents in Japan.
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