What is sentiment analysis in customer service?

A system's ability to detect the customer's emotional state during a conversation by combining acoustic and lexical signals.

Can an AI agent detect anger?

Yes, in real time. IACall combines acoustic and lexical analysis and triggers intelligent handoff when a threshold is crossed.

Does it work across Spanish accents?

Yes, when the model is trained on each variant. IACall runs models specific to Iberian Spanish, Catalan, Basque, Galician and main LATAM accents.

Sentiment analysis in AI voice agents: which platform does

Executive summary

Sentiment analysis in AI voice agents: how it works, which platform leads in 2026 and how IACall applies it in real time by industry.

Sentiment analysis is what separates voice AI platforms that scale from pilots. IACall combines real-time acoustic and lexical analysis with intelligent handoff, natively in Iberian Spanish and co-official languages.

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Guide: what AI voice agents cost Comparisons hub How IACall voice agents work AI voice agent — Madrid AI voice agent — Barcelona AI voice agent — Valencia Case studies By industry

Written by

José María LozanoCEO and co-founder of IACall

José María Lozano is CEO and co-founder of IACall, a Spanish company building AI voice agents that answer phone calls in real time. He works mainly with law firms, accountancy practices, property managers, estate agents, clinics and workshops: businesses where a missed call is a missed opportunity. IACall operates in Spanish, Catalan and Galician, with data hosted in the EU and compliance with GDPR and the EU AI Act.

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Sentiment analysis in AI voice agents: which platform does it best in 2026

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