Get a custom AI voice agent that handles inbound and outbound calls, books appointments, qualifies leads, and integrates with your existing CRM — so your business never misses a conversation.
I Will Build an AI Voice Agent for Your Business
A 30-minute compatibility audit of your existing systems to evaluate and plan your AI voice agent build.
- 30-minute audit of your existing systems
- AI voice agent compatibility evaluation
- LLM model integration assessment
- Recommended architecture and next steps
- Written summary of findings
- 1 revision
A fully configured AI voice agent with RAG and a pre-set conversational journey for your use case.
- Everything in Audit, plus full agent build
- LLM model integration
- Retrieval-Augmented Generation (RAG) for accurate knowledge-base responses
- Pre-set conversational journey tailored to your workflow
- Supports appointment booking, lead qualification or customer support
- 2 revisions
The complete AI voice agent with CRM or database integration so every call updates your existing systems in real time.
- Everything in Standard Build
- CRM or database integration (read and write during live calls)
- Function calling during calls for real-time data actions
- Optimised for both inbound and outbound calling
- Scalable architecture suited to high call volumes
- 3 revisions
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Key details about this service to help you decide. Generated by Zinn Hub, not the seller.
Value Position
Build Platforms
Call Capability
AI Technology
Best For
What You'll Receive
Full Description
Every lead that goes unanswered within five minutes is a lead you've likely lost for good. An AI voice agent changes that entirely — picking up calls, following up instantly, qualifying prospects, and booking appointments around the clock, without hiring additional staff or stretching your team.
This service delivers a professionally built AI voice agent tailored to your business workflows. Whether you need automated appointment booking, outbound cold calling, inbound customer support, or lead qualification, the agent is configured to handle real conversations with the fluency and consistency your customers expect.
What the work covers:
The entry package begins with a thorough 30-minute audit of your existing systems to assess compatibility and map out the optimal AI voice agent architecture for your needs. You receive an LLM model integration as the conversational backbone of the agent.
The Standard package builds the full agent, adding Retrieval-Augmented Generation (RAG) so the agent can accurately draw on your business knowledge base during live calls, plus a pre-set conversational journey designed around your specific use case — whether that is appointment setting, sales follow-up, or customer support.
The Full Build package goes a step further with direct integration into your CRM or existing database, enabling the agent to read and write customer data in real time, update records after each call, and slot seamlessly into the systems your team already uses.
Services available through this listing include AI voice agent development, AI cold calling automation, appointment booking automation, customer support automation, lead qualification, CRM integration, Text-to-Speech (TTS) implementation, and function calling during live calls.
Platforms used to build and deploy the agents include Vapi, Bland, Retell AI, ElevenLabs, Voiceflow, Synthflow, JustCall, Ultravox, and Air AI — giving you access to a broad toolkit rather than a single locked-in vendor.
Who this is for:
This service suits businesses in real estate, healthcare, sales, and any sector where fast lead response, consistent call handling, and scalable customer communication matter. If your team is currently losing leads due to slow follow-up or missing calls, an AI voice agent is a direct solution.
Why work with this seller:
Zinn Digital is a London-based team with a focus on AI-powered automation that produces measurably human-feeling conversations. Fast delivery, clear communication throughout the build, and a commitment to making the finished agent work within your actual stack — not just in isolation.
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Compare Packages
| Feature | Audit | Standard Build | Full Build + CRM |
|---|---|---|---|
| Delivery Time | 2 days | 6 days | 10 days |
| Revisions | 1 | 2 | 3 |
| 30-minute audit of your existing systems | ✓ | ✕ | ✕ |
| AI voice agent compatibility evaluation | ✓ | ✕ | ✕ |
| LLM model integration assessment | ✓ | ✕ | ✕ |
| Recommended architecture and next steps | ✓ | ✕ | ✕ |
| Written summary of findings | ✓ | ✕ | ✕ |
| 1 revision | ✓ | ✕ | ✕ |
| Everything in Audit, plus full agent build | ✕ | ✓ | ✕ |
| LLM model integration | ✕ | ✓ | ✕ |
| Retrieval-Augmented Generation (RAG) for accurate knowledge-base responses | ✕ | ✓ | ✕ |
| Pre-set conversational journey tailored to your workflow | ✕ | ✓ | ✕ |
| Supports appointment booking, lead qualification or customer support | ✕ | ✓ | ✕ |
| 2 revisions | ✕ | ✓ | ✕ |
| Everything in Standard Build | ✕ | ✕ | ✓ |
| CRM or database integration (read and write during live calls) | ✕ | ✕ | ✓ |
| Function calling during calls for real-time data actions | ✕ | ✕ | ✓ |
| Optimised for both inbound and outbound calling | ✕ | ✕ | ✓ |
| Scalable architecture suited to high call volumes | ✕ | ✕ | ✓ |
| 3 revisions | ✕ | ✕ | ✓ |
Portfolio
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Build an AI Voice Agent for Your Business
Build an AI Voice Agent for Your Business
Extra Information
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Tools I Use
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Frequently Asked Questions
To begin the audit or build, please share details about your current systems, your intended use case (e.g. appointment booking, cold calling, customer support), any CRM or tools you use, and any call scripts or knowledge base materials you already have. The more context you provide, the faster and more accurately we can configure the agent.
The audit is a structured review of your existing tech stack and business processes to determine how an AI voice agent can be integrated. You receive a written summary covering compatibility, recommended architecture, and the most suitable platforms and approach for your specific situation.
The agent can be built on Vapi, Bland, Retell AI, ElevenLabs, Voiceflow, Synthflow, JustCall, Ultravox, or Air AI depending on which best suits your use case and existing systems. The audit helps determine the right choice.
Yes. The agent can be configured for inbound use cases such as customer support and appointment booking, outbound use cases such as cold calling and lead follow-up, or a combination of both, depending on the package selected.
CRM integration, available in the Full Build package, allows the agent to retrieve customer information and update records in real time during a call. This means every interaction is logged automatically and your team always has an up-to-date view of each contact.
RAG enables the agent to pull accurate, up-to-date information from your business knowledge base — such as product details, pricing, FAQs, or policies — during a live call, rather than relying solely on the base language model. This makes responses far more accurate and relevant to your specific business.
Each package includes a set number of revisions (1, 2, or 3 depending on tier). A revision covers adjustments to the conversational flow, script, integration configuration, or agent behaviour based on your feedback after the initial delivery. Revisions are requested through the order manager.
Real estate, healthcare, sales teams, and any business that relies on calls for lead follow-up, appointment management, or customer service are particularly well suited. If your business handles a volume of calls where speed and consistency matter, an AI voice agent is directly applicable.
Customer Reviews
See what our customers say about this Zinn
Excellent experience. Communication was clear and professional throughout. The seller provided regular updates, handled changes smoothly, and delivered exactly what was promised. The AI sales agent flow is well-structured and practical.
Excellent experience. Ataib was very professional, communicated clearly and delivered exactly what was promised. I really appreciated the updates throughout the process. Looking forward to scaling this into a fully automated system for our restaurant.
Really solid audit. Ataib went through my entire Go High Level setup and pointed out specific things we were missing, especially around follow-ups and how we could use voice agents instead of manual calling. The breakdown was clear and practical, not generic at all. Definitely worth it. Will be working with him again.
I’ve been working with Ataib across several gigs now, and he’s consistently proven to be reliable, patient, and genuinely invested in the work. What I really appreciate is that he doesn’t just “deliver the task” — he often anticipates problems I hadn’t even noticed and finds clean, creative ways to fix them. For instance, when one of our AI integrations wasn’t behaving as expected, he figured out an alternative approach before I even had time to flag it. He’s detail-oriented, communicative, and clearly cares about the long-term success of the project, not just short-term gigs. Highly recommended — working with him feels like having a real teammate, not just a freelancer.
The demo was perfect – friendly, natural and exactly what we wanted. We're really impressed with the quality and speed. We can't wait to do the full setup. And Ataib is the easiest to communicate with.
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