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Vapi

Vapi

Making enterprise voice AI simple and fully accessible.

#3 dans AI voice generator
2 min read · Updated 10/6/2025
Vapi homepage screenshot

At a glance

Quick overview for Vapi: rating, pricing summary, key features, and highlights.

Ciroapp review

2.8
Advanced AI Tech, Unreliable Operations

Vapi offers unique, high-performance features like 99.99% uptime and intelligent tool calling essential for complex enterprise voice agents. However, recurring severe complaints about non-existent human support and critical billing issues raise serious concerns about operational stability and risk. Overall, we see Vapi as a technically powerful tool currently undermined by critical failures in customer support and financial reliability.

Pros

  • Pro:Ultra-low latency enterprise infrastructure (99.99% uptime).
  • Pro:High customizability using an API-native platform.
  • Pro:Supports bring-your-own LLM, transcription, or TTS keys.
  • Pro:Intelligent Tool Calling for connecting agents to external APIs.

Cons

  • Con:Severe, recurring billing issues reported regarding delayed or denied refunds.
  • Con:Customer support is often non-existent or limited to ineffective bots.
  • Con:Difficulty removing credit card information prevents easy account cancellation.
  • Con:Glitches noted where dashboard fields fail to save reliably.
Free trial
Yes
Range: Usage-based, starting with a $10 free creditFree plan, Monthly subscription, Yearly subscription, Usage-based pricing
This section is a summary. Detailed sections about features, use cases, pricing, and reviews follow below.
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Vapi review, pricing, features, pros & cons

Trying to integrate human-like voice AI agents often requires hundreds of engineering hours. ✨ Vapi solves this frustration by providing the most configurable API designed for leading voice products. You can go from testing in minutes to deployment in just days, not months.

What is Vapi?

Vapi is an API-native platform built specifically for developers who need powerful voice AI capabilities. It’s the essential tool for creating sophisticated voice products and managing large-scale phone operations. The platform offers thousands of configurations and integrations, making the process simple and accessible.

💡 Teams from trail-blazing startups to Fortune 500 companies deploy their voice agents on Vapi.

Vapi Key Features

✨ Deep Customization via API-Native Design

Every capability on Vapi is exposed fully as an API, ensuring total control over your voice agents. The platform offers thousands of configuration options and integrations right out of the box. This API-native approach makes it simple to integrate your existing stack and preferred workflows.

This high level of configurability is designed for engineers seeking flexibility. It ensures you spend less time configuring infrastructure and more time perfecting your intelligent voice product.

✨ Bring Your Own Models (BYOM)

You don't have to rely on a single vendor for critical AI services. You can easily bring your existing API keys for transcription, LLM, or text-to-speech models.

For maximum autonomy and control, you can also plug in your own self-hosted models. This model freedom lets you maintain a flexible tech environment while leveraging Vapi's reliable real-time audio infrastructure.

✨ Intelligent Action Handling with Tool Calling

Voice agents must perform real-world tasks, not just converse passively. The unique Tool Calling feature connects the agent directly to your server APIs seamlessly.

This functionality allows the agent to intelligently take necessary actions outside of the conversation itself. This greatly improves the user experience by letting the agent:

  • Plug in your APIs as tools.
  • Intelligently fetch data.
  • Perform actions on your server.

Agents remain grounded as they retrieve data, delivering a highly efficient and solution-oriented conversation flow.

✨ Optimization and Continuous Improvement

Ensuring quality before deployment is key to achieving success at scale. Automated Testing lets you design comprehensive test suites using simulated voice agents.

This process helps teams identify potential hallucination risks proactively before they reach production users. You can also use A/B experiments to continuously optimize performance by testing different variations of prompts, voices, and entire conversation flows. This iterative approach boosts overall agent accuracy over time.

✨ Enterprise Reliability and Performance

Vapi ensures your users experience a rapid, reliable voice interaction every time. Our custom real-time audio infrastructure guarantees enterprise-grade reliability, operating at 99.99% uptime.

You can scale easily to handle millions of calls quickly and efficiently. All interactions operate with ultra-low latency, offering sub-500ms response times for conversations that feel human and instantaneous.

🌎 Global Reach and Conversation Safety

Deploy agents globally with immediate multilingual support right out of the box. Your agents can talk fluently in English, Spanish, Mandarin, and over 100 other supported languages.

Plus, built-in AI Guardrails keep conversations safe and ensures data accuracy. These conversation guardrails actively prevent model hallucinations and maintain data integrity throughout every interaction your agent has.

Use Cases

📞 Scaling High-Volume Inbound Call Operations

Modern call centers often receive massive amounts of incoming traffic. Vapi provides an enterprise-grade, reliable infrastructure for your voice agents with 99.99% uptime. This stability lets you scale rapidly to handle thousands of interactions per day.

The system maintains ultra-low latency, operating below 500ms even when processing millions of calls. For organizations that need to power 400,000+ daily calls, Vapi delivers the performance and assurance you require.

🛠️ Integrating Real-Time Data and Actions (Tool Calling)

When a voice agent needs to act outside of the conversation itself, you use Vapi's Tool Calling feature. You can plug in your server APIs as tools that the agent intelligently accesses during a call. This allows the agent to fetch necessary data or perform required actions seamlessly.

For example, an agent can receive a call, fetch shi per information, check a broker for available jobs, and conditionally assign the task. This saves hundreds of engineering hours by automating complex operational workflows.

⏱️ Rapid Deployment of Voice Agents

Integrating human-like voice agents traditionally takes months and hundreds of engineering hours. Vapi speeds this process up dramatically, allowing you to go from testing your concept to full deployment in just days.

You start by choosing from thousands of pre-made templates or building your own custom workflow quickly. Once ready, you plug the agent into your website, app, or telephony system and immediately begin handling millions of calls.

🌎 Global Multilingual Customer Support

Expanding your voice service to new regions is simple with built-in multilingual support. Your voice agents can converse naturally in over 100 supported languages, including English, Mandarin, and Spanish.

Vapi uses AI guardrails to avoid model hallucinations and keeps conversations grounded in your data. This ensures high clarity and trustworthy interactions across all of your global markets.

✅ Optimization and Performance Tuning

You need confidence that your voice agents will perform reliably before placing them into production. Automated Testing allows you to design test suites that simulate usage and identify potential hallucination risks early on.

Once deployed, use A/B experiments to continuously refine your flows. You can test variations of voices, prompts, or operational logic to optimize agents proactively based on real-world data and usage.

⚙️ Customizing with Your Existing AI Stack

Vapi is API-native, giving you thousands of configuration options and total control over your setup. You don't have to abandon your existing technology investments.

You can bring your own API keys for specialized services like transcription, LLM, or text-to-speech models. For maximum data control, the platform also supports plugging in your own self-hosted models. This flexibility ensures Vapi works seamlessly within your unique development environment.

🔒 Security and Compliance for Regulated Industries

Organizations in sensitive fields like healthcare and finance require stringent security measures. Vapi meets enterprise-level standards to operate compliantly within highly regulated markets.

We adhere to crucial frameworks, including SOC2, HIPAA, and PCI compliance. This allows you to deploy scalable and highly performant voice agents while guaranteeing strict data security and integrity.

Pricing Overview for Vapi

Pricing range
Usage-based, starting with a $10 free credit
Pricing types
Free plan, Monthly subscription, Yearly subscription, Usage-based pricing

Vapi utilizes a simple, scalable usage-based pricing model, allowing you to pay only for the minutes or messages consumed. They offer a Pay As You Go option with a free starting credit, alongside a custom Enterprise plan for high-volume users.

Plans & Pricing

Pay As You Go

MonthlyUsage based (plus $10/line/mo for additional concurrency)
10 lines included for call concurrency
  • Start with $10 free credit
  • Call minutes are usage based
  • Includes 10 lines for call concurrency
  • Vapi Hosting Calls: $0.05/min
  • Vapi Hosting SMS/Chat: $0.005/msg
START WITH $10 FREE

Enterprise

MonthlyCustom
YearlyCustom annual contract
  • Custom call minutes and concurrency terms
  • Volume based pricing for Vapi hosting costs (Calls and SMS/Chat)
  • Annual contract required
CONTACT SALES

Vapi uses a flexible usage-based model with two main plans: Pay As You Go (PAG), which includes a $10 credit to start, and Enterprise, which requires a custom annual contract.

Understanding the differences between these options will help you choose the best fit for your development needs.

Pay As You Go

Price: Usage based (Vapi Hosting costs are $0.05/min for calls and $0.005/msg for SMS/Chat) Websites Supported: Not explicitly stated Best For: Startups, developers scaling rapidly, or anyone preferring usage-based billing Refund Policy: Not explicitly stated Other Features:

  • Starts with a $10 free credit.
  • Call minutes are usage based.
  • Includes 10 lines for call concurrency.
  • Additional concurrency lines cost $10/line/month.

This plan is perfect if you are experimenting, prototyping, or seeing rapid, variable growth. You get 10 call concurrency lines included, so it’s easy to start without immediate overhead. Just pay for what you actually use after the initial free credit is depleted.

Enterprise

Price: Custom annual contract Websites Supported: Not explicitly stated Best For: Large organizations needing high volume, custom infrastructure, and specialized support Refund Policy: Not explicitly stated Other Features:

  • Call minutes and concurrency are handled via custom terms.
  • Pricing for calls and SMS/Chat is volume based.
  • Contact the sales team for detailed information.

The Enterprise option is designed for massive scale and highly specific operational needs. If you require custom features, dedicated engineering assistance, or need guaranteed service level agreements, you should reach out to the sales team for a custom quote.

There is no explicit free plan, but the Pay As You Go option offers a generous $10 free credit to help you start building and testing your voice agents immediately. Since Vapi operates on a usage-based model, you won't incur charges until you deplete that initial credit, making it very low-risk to get started. ✨

User Reviews

User feedback for Vapi on Trustpilot shows a highly polarized experience, settling at a low TrustScore of 2.5 (Poor). While the technology is described as an “Amazing System,” and some users noted exceptional dedication from technicians—one even received after-hours support on a Saturday night 🎉—critical operational failures frequently overshadowed the positive.

Recurring themes focus on significant billing disputes, including reports of promised refunds being delayed or denied for weeks. Customer service is frequently described as non-existent or limited to unresponsive bots, making account cancellation and credit card removal impossible for some users.

Furthermore, technical issues persist; users have reported features listed in documentation (like DTMF tones) not working and modifications failing to save reliably in the dashboard. Addressing these fundamental issues surrounding support responsiveness and financial reliability is essential for Vapi’s reputation.

What users say elsewhere

Sahil's Fan
· Trustpilot · Jan 18, 2025
5.0 / 5

Amazing System that they are building. I had issues on a Saturday night, and technician Sahil called me to help through my issue. What dedication! Shout out to this guy for his passion.

Alex R.
· Trustpilot · Aug 11, 2025
1.0 / 5

The system is glitchy and subpar. They promised a refund for over $1000 they had taken, but I have been waiting and asking for weeks. This billing situation is completely unacceptable. AVOID!

No reviews yet.

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Why use Vapi?

If you need a scalable voice solution that truly moves the needle, Vapi stands out because it offers unparalleled control and enterprise performance. It’s built to be flexible for engineers while remaining accessible for business needs. Here’s why adopting this platform accelerates development and ensures success:

<ul> <li>**Total Customization:** The platform is API-native, giving you thousands of configuration options. You can easily bring your existing stack, including your own keys for LLM, transcription, or text-to-speech models.</li> <li>**Enterprise Reliability:** Vapi uses custom real-time audio infrastructure, ensuring 99.99% uptime. This stability lets you scale up and down to millions of calls quickly with ultra-low, sub-500ms latency.</li> <li>**Intelligent Action Handling:** Utilize **Tool Calling** to connect the agent to your server APIs. This unique feature lets agents intelligently fetch data and perform necessary actions outside of the conversation itself.</li> <li>**Global Reach & Clarity:** Deploy agents with immediate multilingual support, handling over 100 supported languages, including English, Spanish, and Mandarin. Agents stay grounded using built-in AI guardrails to prevent model hallucinations.</li> <li>**Optimization Tools:** Continuously test and improve agents before production using Automated Testing. You can also run A/B experiments on variations of prompts and voices to optimize your flow’s performance. ✅</li> <li>**Security and Compliance:** For highly regulated industries, Vapi offers enterprise-level security, adhering to SOC2, HIPAA, and PCI standards.</li> </ul>

Ready to transform your workflow with Vapi?

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Frequently Asked Questions

Can I use Vapi with my existing AI models and preferred software?

Yes, Vapi is designed for deep integration and customization. You can supply your own API keys for transcription, LLM, or text-to-speech models. Additionally, the platform is reported to integrate with more than 40 other popular apps for streamlined workflow.

Does Vapi offer a free trial or plan to test the API?

There is no explicit free plan, but the Pay As You Go option starts with a generous $10 free credit. You can use this credit to cover your initial usage costs while building and testing your voice agents.

Is Vapi pricing based on user seats or consumption?

Vapi operates using a simple, scalable usage-based pricing model. You only pay for what your agents consume, such as call minutes or SMS/Chat messages. The cost is not tied to the number of developers or user seats on your team.

What happens if my agent needs to handle more than 10 simultaneous calls?

The Pay As You Go plan includes 10 lines for call concurrency at no extra charge. If your volume increases, you can easily purchase additional lines. Every extra concurrency line costs $10 per month.

What specific security and compliance standards does Vapi meet?

Vapi is built with enterprise reliability and security in mind. The platform provides enterprise-level security for highly regulated sectors and states adherence to SOC2, HIPAA, and PCI compliance standards.

How quickly can I deploy a new voice agent for production use?

The platform focuses on high speed for developers and engineers. Vapi is designed so you can move from initial testing within minutes to full deployment in just a few days, rather than months.

How many different languages can my voice agents support?

Your agents can have a global reach because Vapi offers immediate multilingual support. The platform handles over 100 supported languages, including widely used options like English, Spanish, and Mandarin.

Does Vapi offer an official money-back guarantee or public refund policy?

Not explicitly stated on the official site. The Pay As You Go plan relies on usage-based billing, and no explicit money-back guarantee is mentioned in the provided literature.

What kind of support is available for Enterprise customers?

Enterprise customers receive specialized resources and personalized deployment assistance. This includes access to a dedicated, forward-deployed engineer to help ensure a quick launch.

Can I easily cancel my account or remove my billing information?

Not explicitly stated on the official site. The documentation or specific support channels should contain the detailed process for account cancellation and removal of payment methods.

What is 'Tool Calling' and how does it help my agents?

Tool Calling lets your AI agent connect to your external server APIs. This unique feature means agents can intelligently fetch necessary data or perform actions outside the conversation itself, like booking an appointment.

Who is Vapi best suited for?

Vapi is ideal for startups, developers, and large organizations that need a powerful, API-native platform. It suits anyone focusing on building highly configurable, performant, and scalable voice AI products.

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