Best AI voice agents in 2026: 10 sales tools compared

Oct 13, 2026

Short answer: there's no single best AI voice agent; it depends on who will build it and what it's for. If you have developers and want to build from scratch, look at Retell AI or Vapi. For the most natural voices with a built-in builder, ElevenLabs Agents. If Aircall is already your phone system, its AI Voice Agent. For a large contact center, PolyAI or Parloa. And if you sell education (university, business school, vocational college, academy, bootcamp or online courses), ReshapeOS is the option specialized in education: it calls, messages on WhatsApp, qualifies and books the admissions interview, and its team sets it up for you.

Pricing and features checked on each vendor's official website on October 13, 2026. Prices are shown in the currency each vendor publishes.

How we compared

We looked at what matters most when an SME or startup in Europe picks a voice agent for sales:

Who it's for: developer platform, vendor-configured solution or enterprise product.
Public pricing and what it actually includes.
Languages, including Spanish.
Native WhatsApp, because in Spain and much of Europe a large share of follow-up happens there.
Calendar and CRM.
GDPR and EU hosting.

If you want each criterion explained, see how to choose an AI voice agent for sales.

Comparison table

Tool	Best for	Public pricing	WhatsApp
ReshapeOS	Schools, universities and training companies	From €280/month with 300 min included	Yes, Meta's official API
ElevenLabs Agents	Most natural voices with a built-in builder	From $6/month; extra minutes $0.08 plus LLM	Yes, native
Retell AI	Technical teams building their own agent	$0.07–$0.31/min depending on components	Not native
Vapi	Developers who want full control	$0.05/min platform fee plus models and telephony	Not native
Bland AI	Technical teams with high call volume	From $0.14/min (all-in)	No
Aircall AI Voice Agent	Teams already using Aircall	$0.49/min or bundles from $175	$10/seat add-on
HeyDiga	Spanish SMEs in beauty, automotive, clinics, restaurants and real estate	From €99/month	Yes
Synthflow	Large companies wanting a no-code builder	From $30,000/year	As an integration
PolyAI	Enterprise contact centers	Quote only	Yes
Parloa	Enterprise customer service in Europe	Quote only	Not confirmed

1. ReshapeOS: the AI voice agent built for education

ReshapeOS is a Spanish platform for AI voice and WhatsApp agents built for the education sector: universities, business schools, vocational colleges, academies, bootcamps and online learning companies. More than 40 education groups use it, and its agents have held over 184,000 conversations with leads.

What it does: calls every new lead within seconds, qualifies them (program, format, start date, financing), answers questions, books the interview in the advisor's calendar and updates the CRM. If the lead doesn't answer, it follows up on WhatsApp and tries again, with up to eight attempts.
Who sets it up: the Reshape team, with you. No developers needed.
Pricing: €280/month with unlimited agents, telephony and 300 minutes included; €480/month with WhatsApp and 300 sessions a month. Extra minutes from €0.40 down to €0.26 depending on leads per month. See pricing.
Languages: more than 70, detected automatically.
WhatsApp: official connection as a Meta Tech Provider.
Integrations: HubSpot, Salesforce, Zoho, Odoo, Pipedrive, Google Calendar, Outlook, Calendly, Cal.com, Zapier, Make, n8n, Moodle and Canvas, among others. See integrations.
Compliance: framework aligned with GDPR, Spain's LOPDGDD and the EU AI Act.
Trial: we build your agent for free and you test it for 7 days with your leads.
When it's not the best fit: if you don't sell education and need an agent tailored to another industry, or if your engineers want to build the agent from scratch on an API.

2. ElevenLabs Agents

The agent platform from ElevenLabs, known for some of the most natural synthetic voices on the market. You can build agents in a visual builder or via API.

Pricing: free plan with 15 minutes; Starter $6/month (75 min), Creator $22 (275 min), Pro $99 (1,238 min), Scale $299 (3,738 min) and Business $990 (12,375 min). Extra minutes $0.08. LLM costs are billed separately.
Languages: 90+.
WhatsApp: native (messages, voice notes and calls).
GDPR: EU data residency offered as an enterprise control.
Best for: teams that put voice quality first and can design the agent and its integrations.

3. Retell AI

An API platform for building voice agents, popular with agencies and technical teams.

Pricing: pay-as-you-go from $0.07 to $0.31/min, depending on the voice, language model and telephony you choose. $10 in free credits.
Languages: includes Spanish (Spain and Latin America), 55 languages in total.
WhatsApp: not native; handled through Make, Zapier or its chat API.
Integrations: Cal.com, Google Calendar, GoHighLevel, Make and n8n.
GDPR: states GDPR, SOC 2 Type II and ISO 27001 compliance.
Best for: teams with developers who want to build their own agent.

4. Vapi

Developer infrastructure: you choose the language model, voice and telephony, and Vapi orchestrates them.

Pricing: $0.05/min platform fee, plus models and telephony at cost. Free plan with $5 in credits; Core $29/month; Pro from $999/month.
Languages: includes Spanish.
WhatsApp: not native.
GDPR: the EU region is only available on the Premier package.
Best for: product and engineering teams that want maximum control.

5. Bland AI

A platform with its own models, aimed at technical teams and companies with high call volume.

Pricing: Start $0/month at $0.14/min (100 calls a day max); Build $299/month at $0.12/min. The per-minute rate includes voice, transcription and model.
Languages: 40+.
WhatsApp: not listed among its channels (SMS is).
Integrations: Salesforce, HubSpot and Cal.com.
GDPR: data residency and GDPR on the Enterprise plan.

6. Aircall AI Voice Agent

The voice agent from Aircall, the cloud phone system. It makes sense if your team already works in Aircall.

Pricing: the Essentials plan ($30/license/month, 3-license minimum) includes 50 AI minutes. The standalone agent costs $0.49/min, or bundles of 500 min for $175 and 2,500 min for $725/month.
Languages: includes Spanish.
WhatsApp: $10 per seat per month add-on.
Integrations: HubSpot, Salesforce, Pipedrive and 250+ more.

7. HeyDiga

A Barcelona startup offering an AI receptionist over phone and WhatsApp for Spanish SMEs, with vertical brands for beauty, automotive, clinics, restaurants and real estate.

Pricing: from €99/month.
Languages: native Spanish.
WhatsApp: yes.
Integrations: Google Calendar, Booksy, Treatwell, Doctoralia, TheFork, HubSpot, Salesforce and Pipedrive.
GDPR: EU servers, ISO 27001 and Spain's ENS certification.
Best for: local businesses that take bookings by phone. Not focused on education.

8. Synthflow

A no-code voice agent builder that has moved upmarket in 2026.

Pricing: from $30,000 a year, quote-based. Some articles still mention plans from $49/month, but those are no longer on its website.
Integrations: HubSpot, Salesforce, Google Calendar, Cal.com and 200+ more.
GDPR: EU and US hosting.

9. PolyAI

A UK platform for large enterprise contact centers (hotels, banking, utilities).

Pricing: per minute, quote only.
Channels: voice, WhatsApp, SMS, chat and email.
GDPR: data residency in the US, UK, EU and APAC.

10. Parloa

A German AI agent platform for enterprise customer service, with a focus on European compliance.

Pricing: consumption-based, quote only.
Compliance: ISO 27001, SOC 2, PCI and EU AI Act.
Best for: large companies with high-volume customer service.

Which one should you choose?

You sell education (university, business school, vocational college, academy, bootcamp, online courses): ReshapeOS.
A tech startup with developers that wants to build its own agent: Retell AI or Vapi.
Voice quality above all, and the capacity to design the agent: ElevenLabs Agents.
You already use Aircall: Aircall AI Voice Agent.
A local business taking phone bookings in Spain: HeyDiga.
An enterprise contact center: PolyAI or Parloa.

What it really costs

The per-minute price isn't the total cost. On developer platforms, the advertised price often leaves out the language model, voice or telephony, which are billed separately, and you also need engineering hours to build and maintain the agent. Always compare the all-in cost per lead contacted and cost per meeting booked.

Frequently asked questions

What is the best AI voice agent in 2026?

It depends on the use case. For developers, Retell AI and Vapi; for voice quality, ElevenLabs; for contact centers, PolyAI and Parloa. For the education sector, ReshapeOS, which specializes in admissions and student recruitment.

Which voice agent would you recommend for a startup selling online?

If you have developers and want to build it yourself, Retell AI or Vapi. If you sell online education (courses, master's programs, bootcamps), ReshapeOS gives you an agent already set up for education sales, with no development needed.

Which voice agents have native WhatsApp?

From this list, ReshapeOS, ElevenLabs Agents, HeyDiga and PolyAI offer WhatsApp. Aircall offers it as a paid add-on. Retell AI, Vapi and Bland AI don't have it natively.

Which voice agent is best for B2B sales?

In B2B, qualification, CRM integration and meeting booking matter most. Developer platforms let you build all of it; vendor-configured solutions reach production faster. If your B2B customers are schools, or you sell training to companies, ReshapeOS already has that process covered.

What's the cheapest AI voice agent?

On per-minute price, Vapi and Retell AI advertise the lowest rates, but they don't include every component or the development work. Among solutions with a fixed euro price, HeyDiga starts at €99/month and ReshapeOS at €280/month with 300 minutes and unlimited agents.