Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
From the blog
Real AI system design interview questions from Google, Meta, OpenAI, and Anthropic. Covers LLM serving, RAG pipelines, recommendation systems, AI agents, and more — with detailed answer frameworks.
Choose the right VoIP phone system for your small business in 2026. Compare features, pricing tiers, and deployment options with expert recommendations.
ElevenLabs shipped v3 expressive TTS and consolidated its agents stack into ElevenAgents in March 2026. The MCP-native, action-taking voice agent has arrived.
Durable Objects became the cheapest way to fan out WebSocket events at planet scale in 2026. How hibernation works, when to use it, and the limits to plan around.
The HIPAA Security Rule requires audit controls on every system that touches ePHI. Here is what your AI voice agent has to log to survive an OCR investigation in 2026.
1:1 fitness coaching needs sub-200 ms feedback. Tonal, Future, and Mirror all converge on WebRTC plus a movement-analysis side-channel. Here is the build.
California has 1,552 registered behavioral health providers. San Diego County BHS funding doubled to $1B in 8 years. 42 CFR Part 2 enforcement hit Feb 16 2026. Here is the compliant voice playbook.
Mistral's Voxtral 4B-TTS (March 26 2026) is open-weights, 3 GB quantized, and runs on a single 16 GB GPU. Here's the full local voice agent build using Voxtral Mini for STT and Voxtral TTS.
How Mexico's July 2025 telecom reform replaced IFT with the CRT, how LADA area codes route calls, and how the July 2026 biometric SIM mandate intersects with AI voice agents.
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