Get a bespoke AI voice agent that handles calls, qualifies leads, books appointments, and supports customers around the clock — built on the world's leading voice AI platforms.
I Will Build a Custom AI Voice Agent for Your Business
A focused strategy session to map your AI voice agent requirements and get your project started with LLM integration.
- 30-minute business model and call flow consultation
- AI LLM model integration
- Platform recommendation (Vapi, Retell, Voiceflow, Synthflow, etc.)
- Project scoping and requirements mapping
- Delivered via order chat within 2 days
A complete single AI voice agent build with RAG knowledge integration and a structured conversational journey.
- Everything in the Consultation tier
- Full AI voice agent build on your chosen platform
- Retrieval-Augmented Generation (RAG) for knowledge-based responses
- Pre-set conversational journey design
- Professional AI agent script writing
- TTS voice mapping for natural-sounding speech
The complete end-to-end AI voice agent solution, fully integrated with your CRM or existing database and systems.
- Everything in the Boost tier
- Full CRM and/or database integration
- Inbound and/or outbound agent configuration
- Function calling for real-time actions during live calls
- Appointment booking or lead qualification automation
- End-to-end build, testing, and deployment
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Key details about this service to help you decide. Generated by Zinn Hub, not the seller.
Value Position
Platform Coverage
Entry Package
CRM Integration
Use Case Range
What You'll Receive
Full Description
Your phones should never go unanswered, your leads should never go cold, and your team should never be tied up on repetitive calls. A custom AI voice agent solves all three — and that is exactly what this service delivers.
Whether you need an intelligent inbound agent to handle customer queries, an outbound agent to follow up with leads automatically, or a fully automated appointment booking system, this service covers the complete build from consultation through to deployment.
AI voice agents built here operate with natural, human-like speech using advanced text-to-speech (TTS) mapping and large language model (LLM) integration, so callers experience smooth, coherent conversations — not robotic menus. Every agent is built on industry-leading platforms including Vapi, Retell, Voiceflow, Synthflow, JustCall, Ultravox, and ElevenLabs, chosen based on what suits your specific use case.
**What this service covers:**
— AI voice agent implementation and development
— AI cold calling and outbound automation
— Appointment booking automation
— Customer support automation
— Lead qualification workflows
— CRM and database integration
— Text-to-speech (TTS) mapping for natural-sounding voices
— Function calling for real-time actions during live calls
— Professional AI agent script writing
— Retrieval-Augmented Generation (RAG) for knowledge-based responses (Boost and Premium)
— Pre-set conversational journey design (Boost and Premium)
— Full CRM and database integration (Premium)
**How it works:**
The entry tier begins with a focused 30-minute strategy consultation to map your business model, call flows, and integration requirements alongside foundational LLM model integration. The Boost tier moves into a complete single-agent build with RAG and a structured conversational journey. The Premium tier delivers a fully integrated solution connected to your CRM or existing database — the complete end-to-end implementation.
**Who this is for:**
This service suits sales teams that want automated outbound follow-up, service businesses that need 24/7 inbound call handling, clinics and agencies managing appointment bookings at scale, and any business looking to reduce staffing costs without sacrificing the quality of customer interactions.
Zinn Digital is based in London, England, and brings a precision-focused, quality-first approach to every build. Every project is treated individually — there are no off-the-shelf templates, only solutions built around your business.
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Compare Packages
| Feature | Consultation | Boost | Premium |
|---|---|---|---|
| Delivery Time | 2 days | 7 days | 10 days |
| Revisions | 1 | 2 | 2 |
| 30-minute business model and call flow consultation | ✓ | ✕ | ✕ |
| AI LLM model integration | ✓ | ✕ | ✕ |
| Platform recommendation (Vapi, Retell, Voiceflow, Synthflow, etc.) | ✓ | ✕ | ✕ |
| Project scoping and requirements mapping | ✓ | ✕ | ✕ |
| Delivered via order chat within 2 days | ✓ | ✕ | ✕ |
| Everything in the Consultation tier | ✕ | ✓ | ✕ |
| Full AI voice agent build on your chosen platform | ✕ | ✓ | ✕ |
| Retrieval-Augmented Generation (RAG) for knowledge-based responses | ✕ | ✓ | ✕ |
| Pre-set conversational journey design | ✕ | ✓ | ✕ |
| Professional AI agent script writing | ✕ | ✓ | ✕ |
| TTS voice mapping for natural-sounding speech | ✕ | ✓ | ✕ |
| Everything in the Boost tier | ✕ | ✕ | ✓ |
| Full CRM and/or database integration | ✕ | ✕ | ✓ |
| Inbound and/or outbound agent configuration | ✕ | ✕ | ✓ |
| Function calling for real-time actions during live calls | ✕ | ✕ | ✓ |
| Appointment booking or lead qualification automation | ✕ | ✕ | ✓ |
| End-to-end build, testing, and deployment | ✕ | ✕ | ✓ |
Portfolio
Examples of the seller's work related to this Zinn.
Build a Custom AI Voice Agent for Your Business
Build a Custom AI Voice Agent for Your Business
Extra Information
Why Choose Me
Tools I Use
Perfect For
Frequently Asked Questions
For the Consultation tier, simply share a brief description of your business, your goals for the AI voice agent, and any existing tools or CRM systems you use. The more context you can provide, the more productive the session will be. For Boost and Premium tiers, you will also need to provide access credentials or API keys for your chosen platforms and CRM where applicable.
The platform is chosen based on your specific requirements and use case. Options include Vapi, Retell, Voiceflow, Synthflow, JustCall, Ultravox, and ElevenLabs. During the consultation, the best-fit platform for your goals will be identified and recommended.
Yes. Modern AI voice agents use advanced natural language processing and text-to-speech synthesis to deliver human-like tone, intonation, and responsiveness. The agents built here use TTS voice mapping specifically to ensure natural-sounding speech tailored to your brand and audience.
Yes. Intelligent inbound agents (for customer support, queries, and appointment booking) and advanced outbound agents (for lead follow-up, cold calling automation, and qualification) are both within scope. The exact configuration depends on your chosen tier and requirements.
RAG allows your AI voice agent to draw on your own business knowledge — product information, FAQs, pricing, policies — during live calls, rather than relying solely on a general language model. This means accurate, context-specific answers every time, available in the Boost and Premium tiers.
CRM integration is included in the Premium tier. The agent connects to your existing CRM or database so that call outcomes, lead data, and booked appointments are automatically logged and actioned in real time. This is built using function calling so the agent can read and write data during a live call.
The Consultation tier includes 1 revision; Boost and Premium include 2 revisions each. Revisions cover adjustments to the agent's conversational flow, script, voice settings, or integration logic based on your feedback after the initial delivery.
You will receive a message through the order manager asking for your project details. Please respond as promptly as possible with the information requested — this allows work to begin immediately and ensures your delivery timeline is met.
Customer Reviews
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Top-quality work with excellent communication. Would definitely work together again.
Outstanding work with great attention to detail. Everything was delivered as promised professional, reliable, and highly recommended.
Great experience he knows exactly what he’s doing, skilled and reliable. Delivered perfectly. Highly recommended!
Smooth experience from start to finish, the seller focused requirements perfectly, definitely recommended.
Impressive work, met all expectations, and delivered exactly as agreed. Professional and recommended.
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