An AI phone agent is exactly what it sounds like: an artificial intelligence that answers your business’s calls in a natural voice, understands what callers say, and acts accordingly. It isn’t an IVR with menus. It’s a real conversation.
It sounds like science fiction, but in 2026 the technology is ready. The question isn’t whether it works, but whether it makes sense for your business.
How it works in practice
When a customer calls your number, the AI agent:
- Picks up instantly — no queues, no “all our agents are busy”
- Listens and understands what the customer says in natural language
- Replies in a human voice using your business’s information
- Books appointments directly in your calendar
- Sends a summary via WhatsApp to the customer and to you after every call
- Hands over to a human when it detects that the issue is complex or the customer asks for one
All of this in natural Spanish, with a neutral or localised accent. The average customer can’t tell they’re talking to an AI.
Market prices in 2026
No beating about the bush. These are the typical ranges in the market for setting up an AI phone agent:
- Setup: between €500 and €1,500 across the industry (voice configuration, training with your information, integration with your system)
- Monthly fee: between €100 and €400 depending on call volume
- Cost per minute: €0.05-€0.15 depending on the voice provider (Twilio, ElevenLabs and similar)
At STAKKER, the reference price for the AI phone receptionist (STAKKER Voz) is €49/month with your own number and 100 minutes included (€0.20/min extra), plus a one-off setup fee of €149. Reference prices exclude VAT (IVA, 21%), come with no lock-in contract, and can be improved on when you get in touch: the diagnosis is free and you can try the demo with your own business data before paying. You’ll find the details on the pricing page. A well-sized agent costs a fraction of a part-time employee and is available 24/7.
If you also want to cover messages, the same brain can handle your website and your WhatsApp with an AI chat assistant.
When it’s worth it (and when it isn’t)
It’s worth it if:
- You’re missing calls because you can’t answer while you work
- You get lots of repetitive calls (opening hours, prices, availability)
- You need to book appointments and the manual process eats into your time
- You want to answer out of hours without hiring staff
It isn’t worth it if your business gets fewer than 10 calls a month or if 90% of your sales are face-to-face with no prior appointment.
Want to try it with your business? Request a free audit. We review calls, FAQs and integrations before you decide.