Smart Escalation Ladders: CallSphere Built-In vs Vapi DIY
Acknowledgments table, ladder configs, 120s timeout — built-in on CallSphere. On Vapi this is a from-scratch state-machine engineering project.
15 min read
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AI Voice Agent Insights & Guides
Browse older CallSphere articles on AI voice agents, contact center automation, and conversational AI.
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From the blog
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Langfuse 2026 Update: Evals, Prompt Management, and Datasets Mature
Langfuse's April 2026 release ships online evals, prompt versioning, and dataset workflows. Why self-hosted observability is worth the operational lift in 2026 builds.
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LlamaIndex Workflows for Legal Document Review: Real Pipeline
A Chicago law firm runs LlamaIndex Agentic Workflows to triage discovery documents at scale. Pipeline architecture, error rates, and the trade-offs that worked.
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Vercel AI Gateway: Multi-Provider Routing Without the Vendor Tax
Vercel's AI Gateway routes across OpenAI, Anthropic, Google, and open models with one key. Pricing, observability, and lock-in trade-offs for serious production teams.
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Voice Agent Memory for Receptionist Bots: A Real Production Build
Receptionist bots need to remember callers across visits without violating privacy. The privacy-aware memory architecture for voice receptionists that scales cleanly.
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