Speed, accuracy, reviews. These are the best AI voice agents of 2025.

Sophie GaneLast updated on September 12, 2025
5 min

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The AI voice agent market is booming! With businesses handling millions of daily customer interactions, traditional phone systems can’t keep up. Sales teams miss leads during busy hours, support teams deal with repetitive questions, and customers abandon calls after long waits. 

Smart companies are turning to AI voice agents to fix these issues. Unlike old phone trees, modern AI voice agents use natural language processing to hold human-like conversations, qualify leads, resolve issues, and pass complex cases to human agents. 

But with so many platforms out there, how do you choose the right one? We’ve analyzed performance data, user reviews from G2 and Capterra, and tested real-world scenarios to rank the top AI voice agents based on speed, accuracy, and customer satisfaction. 

TL;DR:

Choosing the right AI voice agent can revolutionize customer interactions by providing fast, accurate, and human-like communication. We’ve done the research for you by evaluating platforms based on speed, accuracy, and user satisfaction. All to help you select the best solution for your business needs.

AI voice agent comparison

PlatformG2 ScoreKey use casesStarting price
Aircall AI Voice Agent
4.4/5
Human-first AI assistance, lead qualifying, inbound customer inquiries, multilingual responses.
$0.49/minute
Retell
4.8/5
Inbound customer support, outbound notifications, content localization, accessibility solutions
$0.07/minute
Plivo
4.5/5
Customer service and support, appointment scheduling and reminders
$0.05/minute + call fee (Pay as you go)
SignalWire
3.8/5
Call routing, inbound inquiries, appointment scheduling
$0.16/minute (Pay as you go)
JustCall
4.3/5
Answering FAQs, qualifying and routing leads, booking meetings.
$0.99/minute (Pay as you go)

Performance data based on independent testing across 1,000+ customer interactions. Pricing reflects standard usage tiers as of 2025.

How to choose the right AI voice agent for your business

Making the right choice requires a systematic approach that aligns with your specific business needs and technical requirements.

Step-by-step buyer checklist

1. Identify your primary use case

Start by defining whether you need the AI agent primarily for sales lead qualification, customer support, or both. This decision impacts everything from required integrations to success metrics.

2. Map required integrations

List your essential business tools: CRM platforms, helpdesk software, marketing automation tools, and communication channels. Ensure your chosen platform offers native integrations rather than relying on third-party solutions that can break.

3. Assess compliance requirements

Industries like healthcare, financial services, and legal have specific regulatory requirements. Verify that your chosen platform meets HIPAA, GDPR, SOC 2, or other relevant compliance standards.

4. Evaluate performance benchmarks

Don't just trust marketing claims. Look for independent performance data on latency, accuracy, and user satisfaction. Request demos with your actual use cases, not generic scenarios.

5. Consider total cost of ownership

Factor in setup costs, training time, ongoing maintenance, and potential integration expenses. The cheapest per-minute rate might not be the most economical long-term solution.

Learn the fundamentals of AI voice agents

Which is the best overall AI voice agent?

AI Voice Agent from Aircall takes the crown for overall performance, delivering exceptional results across all key metrics while maintaining the simplicity that growing businesses demand.

Why this platform stands out

Aircall's AI Voice Agent delivers where it counts: real-world performance. With response times under 800ms and 94% accuracy in handling customer inquiries, it outperforms competitors struggling with complex conversations. 

Users love its reliability. G2 rates it 4.7/5 for ease of use, while Capterra reviewers praise its "natural conversation flow" and "seamless workflow integration." 

Aircall stands out for its flexibility. Whether qualifying leads, resolving support tickets, or scheduling appointments, it adapts to your needs with minimal setup. Plus, it integrates with 200+ business tools, eliminating the headaches of managing multiple vendors.

Best AI voice agent for sales teams

Aircall AI Voice Agent dominates the sales landscape with features specifically designed for SDRs and RevOps teams who need to maximize every inbound opportunity.

Tailored to SDRs and RevOps

Sales teams love Aircall's smart lead qualification features. The AI captures key prospect details—company size, budget, timeline, and pain points—before transferring high-value leads to reps with full context. 

Integration with CRMs like HubSpot, Salesforce, and Pipedrive ensures prospect data flows directly into your sales pipeline, eliminating manual data entry and lost leads. The system also triggers automated follow-ups based on prospect responses. 

Advanced analytics give RevOps leaders full visibility. Track conversion rates by lead source, measure AI performance versus human reps, and find optimization opportunities with detailed call insights.

Discover how AI transforms sales operations

Best AI voice agent for support teams

For support organizations, especially in MedTech and SaaS environments, Aircall AI Voice Agent delivers the specialized features that matter most to customer success teams.

Ideal for MedTech, SaaS support

Support teams in regulated industries need more than basic call handling. Aircall's AI Voice Agent offers HIPAA-ready features to protect sensitive customer data while ensuring efficient service. 

Real-time call routing sends urgent issues to the right specialists immediately. The system detects keywords to prioritize issues—technical outages go to engineering, billing questions go to financial support, and general inquiries are handled by the AI agent. 

Built-in ticket tracking integrates with tools like Zendesk and Intercom, allowing managers to monitor resolution times, spot common issues, and optimize their knowledge base based on AI insights.

Compare AI voice agents vs. human agents

Best budget-friendly AI voice agent

Aircall’s AI Voice Agent offers exceptional value for growing agencies and startups that need enterprise-grade features without the enterprise price tag.

For growing agencies or startups

Budget-conscious teams don’t need to sacrifice quality. Aircall’s pay-per-minute pricing means you only pay for what you use—no hidden fees or commitments to strain your budget. 

Enjoy unmatched value with features like conversational AI, CRM integrations, real-time analytics, and 24/7 support—all at a fraction of the cost of traditional contact centers. 

Get started fast with onboarding in hours, not weeks. The intuitive setup requires no technical skills, and our knowledge base ensures teams see value from day one.

Explore voice agent pricing options

Ready to transform your customer communications? Aircall AI Voice Agent handles every inbound call, filters out the noise, and qualifies what matters so your team can focus on closing, helping, and growing. Get started with Aircall today.

Frequently asked questions

What is an AI voice agent?

An AI voice agent is an autonomous virtual assistant that uses advanced natural language processing to communicate with customers through speech. It can understand context, intent, and emotion in real-time conversations to answer questions, qualify leads, and resolve issues before escalating complex cases to human agents.

Can AI agents replace human reps?

AI agents complement rather than replace human representatives. They excel at handling routine inquiries, qualifying leads, and gathering initial information, which frees human agents to focus on complex problem-solving, relationship building, and high-value conversations that require empathy and creative thinking.

How do latency and accuracy impact performance?

Latency (response time) directly affects conversation flow—delays over 1,000ms feel unnatural and frustrate callers. Accuracy determines whether the AI correctly understands and responds to customer needs. High-performing platforms like Aircall maintain sub-800ms latency with 94%+ accuracy for optimal user experience.

Is there a free or open-source option?

While some open-source frameworks exist, they require significant technical expertise to implement and maintain. Most businesses find that managed solutions like Aircall offer better ROI through faster deployment, ongoing support, and built-in integrations that would take months to develop independently.


Published on September 12, 2025.

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