Figuring out what you'll actually pay for an AI voice agent is harder than it sounds. Most platforms advertise a per-minute rate, but usually that only covers a part of the real cost. And by the time you add things like speech-to-text, LLM processing, phone calls, or other add-ons, your bill can look very, very different.
So, in this guide, we'll break down the real pricing of 11 major AI voice agent platforms. Including Zeeg, in case you want an inexpensive tool that automates your phone scheduling flawlessly. We'll compare what each tool costs, and hopefully you'll be in a better position to choose the best one for your business.
What affects the cost of an AI voice agent?
Before everything, let's understand a bit of the theory — or what really influences the price. Because most voice AI solutions involve different cost layers, but many don't advertise the whole thing.
Most AI voice agent calls touch at least these four components:
- Voice infrastructure / orchestration: The platform's base fee for managing the conversation flow.
- Speech-to-text (STT): Converting what the caller says into text the AI can process.
- Large language model (LLM): The "brain" of the agent — GPT-4.1, Claude, Gemini, etc. — which generates the responses.
- Text-to-speech (TTS): Converting the AI's text response back into spoken audio.
- Telephony: The actual carrier cost to connect the call.
Some platforms bundle these into a single transparent per-minute rate, while others charge for each component separately — which means you might be managing invoices from four or five different vendors at once. We're not saying that some models are inherently wrong, but the total cost per minute is really what matters in the end.
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AI Voice Agent Pricing: 11 tools compared
1. Zeeg AI agents
What it is: Zeeg is a GDPR-compliant scheduling CRM platform with its own AI agent. It answers calls 24/7 with natural conversation, qualifies leads with custom questions you set in your prompt, books appointments directly into connected calendars (e.g. Google, Microsoft, Apple), and routes callers to the right team member. All call data flows automatically into Zeeg's built-in CRM.
Who it's for: Small, medium and large businesses that want AI to handle inbound call routing and appointment booking as part of a broader scheduling and CRM workflow. It's really well-suited for industries where every missed call is a missed booking: sales, legal, real estate, coaching, financial services, etc.
What makes it different: Different from most platforms in this guide, Zeeg's AI agent is not just a voice tool. It sits inside a complete scheduling and CRM platform, meaning that every call outcome — booking confirmed, lead qualified, caller routed — is automatically logged and tracked, with the voice transcript and notes, without any additional integration work. Also, GDPR compliance and European data hosting are built in from the ground up, which matters for teams working with EU customers.
Pricing: Zeeg uses a two-layer pricing model: a subscription plan plus inbound minute bundles for the AI phone feature.¹ The subscription tiers are:
- Starter: Free forever (basic scheduling, no AI phone feature)
- Professional: €10/user/month (annual) — AI phone booking available from this plan onwards
- Business: €16/user/month (annual) — includes round-robin and lead routing
- Scale: €30/user/month (annual) — full platform with SSO and priority support
- Enterprise: Custom pricing
Inbound call minutes are purchased separately as credit bundles, available from the Professional plan onwards:²
Every call shows its exact credit cost directly in the CRM — no hidden fees, no surprise line items at the end of the month. Volume purchasing brings the per-minute rate down significantly: moving from the smallest bundle to the largest cuts the effective cost nearly in half.
For a business handling, say, 2,500 inbound minutes per month, the total monthly outlay would be the subscription fee (from €10/user) plus the €299 credit bundle — putting the all-in cost well below most standalone voice agent platforms, while also getting scheduling, CRM, GDPR compliance, and calendar integrations included.
2. Retell AI
What it is: This one is a developer-focused voice agent platform that gives technical teams full access to build, test, and deploy AI phone agents (they also have chat agents). It still covers both inbound and outbound calls, and includes a built-in cost calculator so you can estimate spend before going live, which can be useful.
Who it's for: Retell AI is made for developers and businesses that want granular control over their voice stack. They'll choose their own LLM, voice engine, and phone system, and they need to be comfortable managing a modular system, and to have technical capacity to set up the tool.
Pricing model: They have a pay-as-you-go model, with no monthly commitment, where new accounts get $10 in free credits to start. The platform fee is transparent and component-based, with a published cost estimator. But there's also an Enterprise plan — the pricing is custom-made, though, so you'd have to get in touch with them.
Here's what the components cost on the pay-as-you-go plan:³
Real-world all-in cost: Using GPT-4.1 and a standard voice with US telephony, a typical call runs approximately $0.13–$0.15/min. But with more capable models or premium voices, that figure rises to $0.20–$0.31/min. And indeed Retell's own pricing page shows a range of $0.07–$0.31/min, depending on configuration.³ With so many different paid options, there's a learning curve coming with Retell AI, as you try to understand what's the best model for your business.
Enterprise plan: As said before, this plan has custom pricing for organizations with high volume. It includes dedicated servers, a higher concurrency cap, HIPAA/BAA compliance, custom MSA/DPA terms, and 24/7 support. Enterprises spending $3,000+/month typically negotiate lower per-minute rates.
Other costs to know:
- Phone numbers: $2.00/month each
- Concurrency (beyond the 20 included): $8.00/concurrent call/month
- Branded caller ID: +$0.10/outbound call
- AI Quality Assurance: $0.10/min (first 100 minutes free)
Bottom line: Retell is one of the more transparent platforms in this space, and that's an advantage — the component-based pricing means you know exactly where your money is going, and the built-in calculator helps estimate monthly costs before you commit. However, that doesn't necessarily mean being cheaper.
3. Vapi
What it is: Vapi is also a developer-first voice AI infrastructure platform, for teams that want maximum flexibility to bring their own models, voice engines, and phone systems. It's basically considered "middleware" — you connect the pieces yourself rather than getting a ready-to-deploy product.
Who it's for: Technical teams with strong engineering resources who need deep customization and want to control all layers of their voice system.
Pricing model: Usage-based, starting at $0.05/min — but that figure covers only Vapi's orchestration/hosting layer. It does not include STT, TTS, LLM, or telephony. And they also have an Enterprise plan, with custom pricing.
Here's how the actual cost breaks down in a typical production setup:⁴
Real-world all-in cost: When you add STT, LLM, TTS, and telephony on top of the $0.05/min platform fee, the total per-minute cost rises considerably — with the exact figure depending on which models and providers you choose. A lean configuration using low-cost STT and a smaller LLM will land at the lower end; a setup using premium models like GPT-4.1 and ElevenLabs will push costs noticeably higher. Unlike Retell, where component costs are consolidated in one dashboard, Vapi's model means you may be reconciling bills from four or five separate vendors each month.
Enterprise plan: Custom pricing with unlimited concurrency, dedicated support, HIPAA compliance options, and negotiated rates.
Important caveats: New accounts get $10 in starting credits and there is no perpetual free plan. HIPAA compliance requires a $1,000/month add-on on pay-as-you-go plans.⁴ Businesses choosing Vapi for enterprise deployments should factor in not just per-minute costs but also the engineering time and overhead of managing a multi-vendor stack — costs that don't appear on any single invoice.
Bottom line: The $0.05/min headline rate covers only Vapi's orchestration layer, and the full deployment cost is meaningfully higher once all components are included. For teams with the technical capacity to manage the complexity, the customization is genuine. But for others, the operational overhead can be significant.
4. Bland AI
What it is: Here, we're talking about a voice agent platform for building inbound and outbound AI phone agents using a conversational pathways system. The tool offers a free tier to get started and tiered plans with lower per-minute rates at higher subscription levels.
Who it's for: Developers and teams looking for a structured, plan-based pricing model with relatively straightforward rate tiers.
Pricing model: Bland moved to a plan-based per-minute pricing structure in December 2025. The rate you pay depends on which plan you're on:⁵
A few things worth noting about how billing works:
- Billing is prorated to the exact second — so there's no rounding per call.
- Only connected calls are charged; but failed calls still incur a $0.015 minimum outbound fee.
- After a human transfer, only the reduced transfer rate applies; the full per-minute rate stops.
- Customers who bring their own Twilio (BYOT) pay no transfer fees.
Plan limits:⁵
Other costs: SMS at $0.02/message.
Bottom line: Their pricing is cleaner than Vapi's because the per-minute rates are clearly published per plan. The free Start tier is usable for testing, though the jump to $0.14/min on the free plan is noticeably higher than developer-tier rates on Retell. For teams with predictable, mid-volume usage, the Build or Scale plans offer a reasonable cost-per-minute.
5. GoHighLevel (GHL)
What it is: GoHighLevel is more like a marketing automation and CRM platform built for agencies. And within its AI Employee suite, there's the Voice AI — an inbound phone agent that answers calls, qualifies leads, and books appointments — along with conversation AI, content AI, and more. It's tightly integrated with their CRM, pipeline, and automation workflows.
Who it's for: Marketing agencies and their clients, like small businesses in service industries (dental, home services, real estate, etc.) that already use the GoHighLevel ecosystem.
Pricing model: Voice AI sits inside the AI Employee suite, which offers two billing options:⁶
- Pay-as-you-go: $0.06/min for the voice engine, plus LLM token costs on top. GHL's own internal benchmark puts the average all-in cost at approximately $0.163/min across typical usage patterns.⁶ Note: telephony (LC Phone or Twilio) is billed separately.
- Unlimited AI Employee plan: $97/month per sub-account. This covers unlimited use of Conversation AI, Reviews AI, Content AI, and Funnel AI. However, Voice AI with external AI models is still billed per minute on top of this fee.
Platform subscription (needed separately):
- Starter: $97/month
- Unlimited: $297/month
- SaaS Pro: $497/month (required for rebilling to clients)
So a typical agency deploying GHL Voice AI to a client sub-account pays their platform subscription, plus the $97 AI Employee add-on per sub-account, plus per-minute voice charges.
Rebilling: Agencies on the $497/month SaaS Pro plan can mark up and resell AI Employee services to their clients — a common packaging model. The "AI Receptionist" package typically retails at $200–$400/month to end clients.
Bottom line: GHL's Voice AI is compelling for teams already inside the GHL ecosystem, since everything connects natively to CRM, pipeline, and automation. For newcomers, the layered platform + add-on + per-minute structure will likely mean significant costs, especially if you're deploying at scale.
6. Synthflow
What it is: Synthflow is a no-code voice AI platform designed for businesses that want to deploy agents without managing multiple third-party integrations. It bundles the voice engine, telephony options, and LLM access into a single platform with a usage-based pricing model.
Who it's for: Businesses and agencies that want an easier deployment path than developer platforms like Vapi or Retell, and don't want to manage separate contracts for STT, TTS, and LLM providers.
Pricing model: Synthflow moved to a fully pay-as-you-go model (no more fixed monthly tiers). Usage is metered per second on successful calls — failed calls are not charged.
The component-based rates on the PAYG plan are:⁷
Real-world all-in cost: With GPT-4.1 and Synthflow-managed telephony, you're looking at roughly $0.16/min. Synthflow's own FAQ states that most PAYG setups land between $0.15–$0.24/min depending on LLM and telephony selections.⁷ Bringing your own Twilio account reduces that to around $0.14/min.
Enterprise plan: For teams processing 10,000+ minutes/month, Synthflow offers a custom Enterprise tier with guaranteed 99.99% uptime, native telephony (not Twilio), unlimited concurrency, HIPAA compliance, and dedicated support.
Other costs: Phone numbers at $1.50/month each.
Bottom line: The PAYG model is easy to start with, and the bundled approach removes the need to manage multiple vendor relationships. The cost per minute is higher than a well-optimized Retell or Vapi setup, but that gap often narrows when you factor in the engineering time and complexity that the latter might need.
7. JustCall
What it is: JustCall's AI Voice Agent is just an add-on, in this case. Because JustCall is a business communications platform (VoIP, SMS, analytics). But the AI agent handles inbound calls 24/7, including appointment scheduling, lead qualification, FAQ handling, and call transfers.
Who it's for: Sales and customer support teams that want AI voice capability layered on top of an existing business phone system, especially teams already using JustCall for their calling stack.
Pricing model: JustCall has two separate pricing layers. The base platform subscription is required first:⁸
The AI Voice Agent is then priced separately as an add-on:⁸
What's in each AI plan:
- PAYG: Basic AI voice agent, 14 languages, no CRM logging included.
- Agent Lite: Adds CRM logging, appointment scheduling, knowledge base (1 KB), SMS, call transfers, and API/webhook support.
- Agent Max: Adds voice cloning, 5 knowledge bases, multilingual support, custom AI actions, and outbound calling (beta).
Cost per effective minute: At $99/month for 100 minutes, the Agent Lite plan works out to $0.99/min of AI call time — the same as the PAYG rate. The value comes from the bundled features (CRM logging, scheduling, transfers) rather than volume savings. At Agent Max, 300 minutes for $249 also works out to $0.83/min — modest savings.
Bottom line: JustCall's AI Voice Agent pricing is on the higher end per minute compared to developer platforms. The value proposition is integration — it's built directly into the JustCall communications stack, so teams already using JustCall for calling and SMS get AI voice without stitching together additional tools.
8. Dialpad
What it is: Voice, video, messaging, and AI-powered contact center capabilities — that's Dialpad's offer, on its mature unified communications platform (UCaaS). Its AI Agents product, launched as part of its Agentic AI Platform in late 2025, handles autonomous voice-based customer interactions.
Who it's for: Mid-market and enterprise teams that want AI voice capability within a full UCaaS stack, especially those already using Dialpad for their business phone system.
Pricing structure: The pricing model is split across different product lines, which can make it confusing to compare. The entry point ($15/user/month) applies to Dialpad Connect — the standard business phone product — not the AI contact center.⁹
Dialpad Connect (UCaaS):⁹
Dialpad AI Agents (autonomous voice agents): Priced on a conversation/credit basis — not per-seat. Rates are not published publicly; they're billed through a credit system visible only after usage begins. Teams combining human agents on Support plans with AI Agents face a third, uncapped billing layer.
Additional cost layers to be aware of:
- International calling beyond 1,500 minutes/month requires the Global Unlimited Calling add-on.
- AI features like CSAT scoring and AI Scorecards are locked behind the Premium tier.
- Premium support is a separate paid add-on.
- Internet fax, larger meetings, and conference room lines all carry extra fees.
Bottom line: This is a capable platform for enterprises, no doubt — but one that needs a unified communications stack with AI features built in. However, the gap between its $15/user/month headline and the real cost of running an AI contact center with autonomous agents is quite steep. So, budget modeling here requires careful attention to which product suite, pricing tier, and add-ons you'll need.
9. Bolna AI
What it is: Here's another open-source-friendly voice AI platform. But this one is built primarily for the Indian market and Southeast Asian languages, including Hindi, Tamil, Telugu, and Hinglish. It's used by businesses running high-volume outreach, lead qualification, and appointment-setting campaigns.
Who it's for: Teams operating in South Asian markets, companies needing strong multilingual support in Indian languages, or developers looking for a cost-effective platform for high-volume calling.
Pricing model: Bolna offers three models — pay-as-you-go credits, monthly subscription plans, and enterprise contracts.
Pay-as-you-go: Purchase credits from $10 to $5,000. Pricing varies by LLM, voice (TTS), and STT provider — Bolna's pricing calculator on their site lets you estimate costs based on your specific configuration (OpenAI/Anthropic/Azure for LLM, ElevenLabs/Deepgram/Cartesia for voice, Deepgram/Azure for STT, and Twilio/Plivo for telephony).
Monthly subscription plans:¹⁰
Each plan includes one expert-built agent per quarter (or per month at higher tiers), analytics, and priority support. The Scale plan also includes a dedicated account manager.
Enterprise: Custom pricing with best-in-class rates at committed volumes, custom integrations, and deployment options.
Bottom line: Their rates per minute are among the lowest in this guide at volume — $0.05/min on the Scale plan, with those minutes including everything. For teams running large outbound campaigns in Indian or South Asian markets, Bolna is a strong contender. For Western markets or smaller volumes, other platforms may offer a more turnkey experience.
10. Cartesia AI
What it is: Cartesia is an AI voice technology company focused on ultra-low-latency text-to-speech and speech-to-text models, as well as voice agent development through its Line platform. Its flagship Sonic-3 TTS model achieves a 90ms time-to-first-audio — one of the fastest available. Cartesia is often used as a voice component by other platforms (Retell AI, for example, offers Cartesia voices) and is now expanding into full agent deployment via Line.
Who it's for: Developers and product teams that care deeply about voice latency and quality, either as a TTS/STT component integrated into another stack, or as a full voice agent platform via Line.
Pricing model: Cartesia uses a monthly subscription model with credits for TTS/STT and separate per-minute rates for voice agent calls via Line.¹¹
Voice agent calls (Line platform):¹¹
- Telephony: $0.06/min
- STT (Ink): $0.014/min
- LLM usage: currently free for a limited time during Line's early access period
- TTS: included from plan credits (at 1 credit per character)
Concurrency: Free plan supports 8 concurrent requests. Scale supports 60. Enterprise is custom.
Key feature — Ink-Whisper STT: Cartesia's speech-to-text model (Ink-Whisper) is positioned as the most affordable streaming STT option on its Scale plan at $0.13/hour — significantly cheaper than alternatives like Deepgram's Nova at $0.0084/min ($0.504/hr). This is relevant for teams building multi-component stacks.
Bottom line: Cartesia is a specialist in a world of generalists. If voice latency is your top priority, or if you want to use best-in-class TTS/STT as a component inside another platform, Cartesia is worth evaluating. As a standalone voice agent platform via Line, it's still maturing compared to Retell or Vapi.
11. Aircall
What it is: When you look at Aircall, it's important to know its core basics — a cloud business phone system aimed at sales and support teams. Its AI Voice Agent, a virtual receptionist, handles inbound calls, answers FAQs, qualifies callers, and transfers to human agents with context. It's built on top of Aircall's existing VoIP infrastructure.
Who it's for: Sales and support teams that want AI voice capability within their existing phone system, particularly those already using Aircall for calling.
Pricing model: Aircall's platform subscription is required first, with the AI Voice Agent priced separately using tiered per-minute rates.
Base platform:¹²
Calls under 15 seconds are not billable. Standard Aircall telephony rates apply separately on top (local inbound calls are included at no extra cost on existing plans, except toll-free numbers).
AI add-ons: Aircall also offers an AI features add-on (call summaries, sentiment analysis, CRM logging, call scoring) at $9/license/month on top of the base plan — separate from the AI Voice Agent.
Cost in context: At $0.99/min for the first 500 minutes, Aircall's AI Voice Agent pricing is among the highest in this comparison on a per-minute basis. Volume brings the rate down meaningfully — at 2,500+ minutes, the $0.49/min rate is more competitive. For low-to-mid-volume use cases, the per-minute cost is steep.
Bottom line: Aircall's strength is its existing VoIP infrastructure and integrations (Salesforce, HubSpot, Zendesk, and 100+ others). Teams already on Aircall can add AI voice without switching platforms. For teams evaluating AI voice from scratch, the per-minute pricing requires careful volume modeling before committing.
Overview comparison
How to choose the right platform for your needs
The right platform depends less on the headline number and more on your specific situation. A few questions that help narrow it down:
Do you want to sort your scheduling and your CRM tracking? If you want one of the best voice AI agents for meeting scheduling, with lead routing and complex booking cases, Zeeg's bundled approach gives you complete scheduling, plus a CRMand AI phone answering in a single product — without managing separate vendor relationships.
Do you have in-house engineering resources? Vapi and Retell give developers the most flexibility and potentially the lowest per-minute cost, but they require meaningful engineering investment to deploy and maintain. Synthflow or GHL are more accessible if your team doesn't want to manage a multi-vendor stack.
How predictable is your call volume? Low or inconsistent volume favors pay-as-you-go (Retell, Vapi, Bland's Start plan). High, predictable volume makes subscription tiers from Bolna, Synthflow, or JustCall more cost-effective.
Are you subject to GDPR or HIPAA compliance requirements? Retell and Dialpad offer HIPAA compliance at enterprise tiers, while Synthflow supports HIPAA at higher plans too. Zeeg is built GDPR-compliant by default, with all data hosted on European servers — making it the only platform in this guide that was designed and built in the EU, with European data hosting as a standard feature across all plans rather than an enterprise add-on.
Are you building a product or deploying a business tool? Cartesia is an infrastructure provider — ideal for product teams building voice into their own software. Synthflow, JustCall, and Aircall are operational tools — better for businesses deploying voice AI for their own customer interactions.
Sources
- Zeeg pricing
- Zeeg AI Phone Answering
- Retell AI pricing page
- Vapi AI pricing
- Bland AI billing documentation
- GoHighLevel AI Product Pricing Update
- Synthflow pricing page
- JustCall pricing page
- Dialpad pricing page
- Bolna AI pricing page
- Cartesia AI pricing page
- Aircall pricing page
- Aircall AI Voice Agent pricing documentation
