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Hi, I’m looking for a freelancer who can build an AI voice-calling agent for my business. The agent should be able to receive and make calls, talk naturally with customers, understand their requirements, qualify leads, schedule appointments, send SMS confirmations, and integrate with Google Calendar
Project ID: 40664272
17 proposals
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17 freelancers are bidding on average ₹8,027 INR for this job

Hey, AI Voice Agents expert 3yrs+ experience in industry. Can 100% do it for you on the stack of your choice vapi/retell/n8n anything works, have done everything countless times. Awaiting more details, let's do it.
₹12,000 INR in 7 days
5.4
5.4

I can build your AI voice calling agent in 3 days using a fully self-hosted, zero-API-cost stack built on the latest open-source models. For speech recognition I'll use SenseVoice (Alibaba's 2024 model — ~15× faster than Whisper-Large with built-in emotion detection, ideal for real-time calls), CosyVoice 2 for streaming TTS (natural human-like output, <150ms first-chunk latency), and DeepSeek V3 / Qwen2.5-72B as the reasoning brain — both support native function calling for calendar booking, lead scoring, and SMS triggers. Served locally via vLLM/Ollama for sub-second end-to-end response. Twilio handles telephony; Google Calendar API manages scheduling; transcripts stored in PostgreSQL. Day 1: Telephony wiring + core conversation flow. Day 2: Calendar/SMS integration + lead qualification logic + prompt tuning on your domain. Day 3: Load testing, latency optimization (<800ms round-trip), deployment, handover docs. I specialize in Python + LLM integrations and have shipped similar conversational systems. Ready to start immediately — send a message and let's lock down your lead qualification criteria.
₹7,000 INR in 7 days
0.0
0.0

Hello, I’m interested in building your AI voice-calling agent. I’m a new freelancer currently building my portfolio in AI automation and AI agent projects. While I’m not claiming years of professional experience, I’m comfortable working with AI tools and APIs and I’m willing to build and test the system carefully based on your requirements. I can work on an MVP covering the main workflow: • AI voice calls for incoming/outgoing conversations • Understanding customer requirements and qualifying leads • Appointment scheduling • Google Calendar integration • SMS confirmation I would start by building and testing the core call workflow before expanding it, so we can make sure the conversations and scheduling work correctly. I’m offering a competitive ₹7,500 INR because I’m currently building my freelance portfolio and looking for an opportunity to earn my first reviews through real projects. Any third-party costs such as telephony, SMS, voice AI, or API usage can be handled separately by the client or provided through your existing accounts. I’d be happy to discuss the exact call flow and requirements. Thank you for considering my proposal.
₹7,500 INR in 7 days
0.0
0.0

Hello, I understand that your goal is to enhance customer interactions and streamline operations through an AI voice agent. To achieve this, I would develop a solution that not only handles calls but engages customers in a conversational manner, ensuring their needs are accurately addressed. My approach involves leveraging advanced natural language processing to create a seamless experience, coupled with robust integrations for scheduling and confirmations. I will maintain open communication throughout the project, providing regular updates and being responsive to your feedback to ensure alignment with your vision. Could you share what specific features you envision for the lead qualification process? Additionally, do you have any existing systems that the voice agent needs to integrate with besides Google Calendar? Regards, Soné Joubert
₹3,750 INR in 14 days
0.0
0.0

Building a live voice agent that handles real calls end-to-end means solving latency and reliability across the STT, LLM, and TTS stack. I run a live AI phone agent in production that handles inbound calls in German, built on my own server with Telnyx SIP and streaming STT/LLM/TTS. You need lead qualification and appointment scheduling. I've engineered custom multi-agent orchestration and retrieval pipelines for similar complex logic. I can integrate SMS and Google Calendar using webhook plumbing and custom tools. Let's start with a fixed-price milestone to build out the core call flow and a basic lead qualification script for ₹5,637. Share your desired call script and initial qualification questions. I will map out the agent's full conversation flow.
₹5,637 INR in 7 days
0.0
0.0

You need a working AI voice automation that qualifies, books, confirms and safely transfers calls, not only a conversational demo. Outbound calling also requires a documented consent source, DND/opt-out handling and compliant calling hours. I propose a bounded pilot: one phone number, one transparent AI voice agent, inbound reception, one consented warm-outbound path, lead qualification, Google Calendar booking, SMS confirmation, human transfer, an approved knowledge base and a scripted QA report. One revision is included. My relevant GoHighLevel, automation and VoiceConnect work is visible on my Freelancer profile: https://www.freelancer.com/u/ach57c19677d5087 The ₹5,900 bid covers setup and testing. HighLevel AI, phone-number, telephony and usage charges are client-paid. I will begin only after a funded milestone is created and the outbound contact source, target country, calling hours, DND/opt-out rules and client compliance ownership are confirmed. No purchased or scraped cold lists, unsolicited consumer robocalling or deceptive human impersonation. Please share the business purpose, consent source, approved FAQ, calendar, transfer number and expected call volume.
₹5,900 INR in 3 days
0.0
0.0

I can deliver a focused AI calling-agent MVP covering inbound and outbound calls, natural lead qualification, appointment booking, SMS confirmation, and Google Calendar integration. I would structure it around a telephony provider such as Twilio, streaming speech and an LLM conversation layer, with explicit business rules, consent-aware call flows, retry handling, and structured call summaries. The first milestone would validate one inbound and one outbound scenario end to end; the second would add qualification logic, scheduling, SMS, and deployment documentation. Please confirm your target country, approximate monthly call volume, preferred phone provider, and the qualification questions your team currently uses.
₹9,000 INR in 7 days
0.0
0.0

Hello, I’m interested in building your AI Voice Agent for your business. I have experience with Python and backend development, and I can work on the integration required for an AI voice-calling system. I understand that the agent needs to: • Handle incoming and outgoing calls • Communicate naturally with customers • Understand customer requirements and qualify leads • Schedule appointments • Send SMS confirmations • Integrate with Google Calendar • Connect different AI/API services into one workflow I can build the system step by step with a clean and reliable backend, focusing on proper API integration, automation, and customer interaction. I’m available to start immediately and can provide regular progress updates. Thank you for considering my proposal. I would be happy to discuss the project requirements and start with the first part of the implementation. Best regards, Vaishnavi Python Backend Developer
₹7,000 INR in 7 days
0.0
0.0

Hi, I can build a reliable AI voice agent that receives and makes calls, understands customer requirements, qualifies leads, books appointments, and sends SMS confirmations automatically. I would use Vapi or Retell for the natural voice conversation, a suitable telephony provider for inbound/outbound calls and SMS, and n8n for Google Calendar, lead data, APIs, and workflow automation. The agent will be configured to: • Answer calls with a natural business-specific greeting • Ask structured questions without sounding scripted • Identify the customer’s needs and qualification status • Handle interruptions and conversational responses • Check available Google Calendar time slots in real time • Book, reschedule, or cancel appointments • Send SMS confirmations and follow-up reminders • Store customer details, transcripts, and call outcomes • Transfer or escalate calls when human assistance is required • Prevent duplicate bookings and handle failed integrations safely I will first create the conversation script and qualification logic, then provide a working call prototype for your approval before completing the calendar and SMS integrations. Please share your business type, qualification questions, target country, preferred voice/language, call volume, and appointment duration. Third-party calling and SMS charges will remain under your own accounts. I am available to start immediately. Best regards, Muhammad Jahangeer
₹5,000 INR in 3 days
0.0
0.0

I will build a production-ready, custom AI Voice Agent that handles inbound and outbound calls naturally and qualifies leads. With 20+ years of software development experience—specializing in backend architectures, LLM integrations, and voice communication systems—I recently delivered a production Voice AI agent automating 80% of 20,000 monthly support calls (using Go, Whisper STT, GPT-4o-mini tool calling/RAG, ElevenLabs TTS, and Redis session state). Here is the modular technical stack and roadmap I will deliver: 1. Voice Integration: Live speech-to-text (Whisper/VAPI/Retell) and low-latency text-to-speech (ElevenLabs/Deepgram) pipeline for near-zero delay natural conversations. 2. Brain/NLP Module: LLM (GPT-4o/Claude) with structured tool-calling to extract customer requirements, qualify leads, and maintain dialogue context. 3. SMS & Calendar Integration: Automation hooks (using Twilio or local gateway) to send instant SMS confirmations, and Google Calendar API integration to schedule appointments. 4. Testing: Simulated call scenarios to verify latency, voice quality, and edge-case handling. Ready to discuss your business flows and design a responsive prototype.
₹12,000 INR in 7 days
0.0
0.0

Hi — I’m Hamdi Kaan Koçdağ. I build voice AI agents (Ses Asist) and automation systems, so an agent that takes and makes calls, qualifies leads and books appointments is work I've shipped before. Approach: telephony via Twilio, streaming speech-to-text plus natural TTS, an intent layer that captures the caller's need and qualifies them against your criteria, Google Calendar API for real availability and booking, and SMS confirmations after each booking. Honest note: at this budget I won't promise the entire inbound + outbound + qualification + calendar + SMS stack in one go. Phase 1 in 10 days: one production-quality call flow end to end — inbound call, natural conversation, lead qualified, appointment written to Google Calendar, SMS confirmation sent. Outbound campaigns and extra integrations follow in phase 2, priced once you've seen phase 1 run on real calls. You provide telephony and LLM/TTS keys; per-minute call charges are yours. You get working code, config and a short handover doc. Demos and CV on request. — Hamdi Kaan Koçdağ
₹7,000 INR in 10 days
0.0
0.0

Hi, My approach would be to build this as an AI voice agent with a real-time conversation pipeline. I’d use a telephony provider like Twilio/Vapi/Retell for inbound and outbound calls, connect it to an LLM for intent understanding and natural conversations, and build the backend with FastAPI. The agent would collect and qualify lead information, use the Google Calendar API to check availability and schedule appointments, and trigger SMS confirmations after successful bookings. I’d also add conversation logging, call transcripts, error handling, and monitoring, with a scalable architecture that keeps latency and operating costs low.
₹7,000 INR in 7 days
0.0
0.0

Surat, India
Member since Aug 22, 2026
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₹1500-12500 INR