Executive summary
The fastest-growing companies in 2026 use AI to generate revenue, not just save. Forrester confirms a 15% to 25% increase with AI in sales and retention.
Most companies justify AI with cost savings. But the fastest-growing in 2026 use it to generate revenue. According to Forrester, organizations deploying AI in sales and retention increase revenue by 15% to 25%. Voice AI agents don't just answer calls, they sell, retain and upsell autonomously.
From Savings to Growth: The Narrative Shift
During 2024 and 2025, the AI conversation centered on cost reduction. "Fewer agents, lower cost per call, less wait time." That's fine. But Deloitte notes in its "AI-First Customer Service 2026" report that leading companies have moved past that phase and use AI as an active sales channel.
Revenue increase with AI in sales (Forrester)
More products offered per interaction
Voice upselling acceptance rate
Improvement in customer retention
FAQ
Can a voice AI agent really sell?
Yes. It's not aggressive selling. The agent detects natural opportunities in conversation and makes relevant recommendations. The 18% acceptance rate is comparable to the best human upselling agents.
Isn't it invasive for the customer?
Quite the opposite. Customers value recommendations when they're relevant. The key is context: an agent that knows your history and needs doesn't bother, it helps.
How soon can I see returns?
Companies activating sales features with IACall see measurable results in 4 to 6 weeks. Typical ROI exceeds 300% in the first quarter.
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Written by
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.