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B2B AI Outbound Calling Platform /bot — Freelancer.com Project Brief Page 1 PROJECT PROPOSAL B2B AI Outbound Calling Platform VICIdial Integration • AI Voice Agent • Meeting Booking Project type AI voice calling platform and web dashboard Target market United States — business agencies Call language English Primary goal Qualify prospects and book meetings Dialer integration VICIdial (version to be assessed) Deployment Self-hosted backend with managed AI voice services Project objective Build a functional, tested, and deployable B2B AI outbound calling platform. The AI agent will contact eligible business leads in the United States, communicate naturally in English, qualify prospects, book meetings, and save call outcomes in a central dashboard and VICIdial. This document is intended as a project brief for posting on Freelancer.com. The final architecture and scope will be confirmed after reviewing the existing VICIdial/Asterisk environment. B2B AI Outbound Calling Platform — Freelancer.com Project Brief Page 2 1. Scope of Work A. AI Voice Agent • Natural, professional English-speaking AI voice for outbound business calls. • Configurable sales scripts, qualification questions, and conversation flows. • Meeting booking when a prospect expresses interest. • Call outcome classification, summaries, and transcripts. • Recording support only where legally permitted and properly configured. • Handling of interruptions, silence, voicemail, poor audio, and call failures. • Immediate opt-out handling and suppression of future promotional calls. B. VICIdial Integration • Assess the installed VICIdial and Asterisk versions before selecting the integration approach. • Synchronize leads, call statuses, outcomes, and external call identifiers through a verified integration method. • Implement error handling, retries, and duplicate prevention. • Evaluate two architectures: managed provider originates calls with results synced to VICIdial, or VICIdial/Asterisk originates calls and connects to the AI agent through verified SIP/media integration. • Do not assume provider compatibility; validate the chosen call path with a proof of concept. C. Backend and Database • Preferred backend: Python, FastAPI, Pydantic, SQLAlchemy, and Alembic. • PostgreSQL database for leads, campaigns, calls, appointments, consent records, suppression lists, and audit logs. • Secure REST APIs, webhooks, background jobs, structured logs, and health checks. • Idempotent event processing and safe retry behavior. D. Web Dashboard • Responsive dashboard with campaign and calling analytics. • Lead management, CSV import, search, filters, and call history. • Campaign creation, configuration, start, pause, and stop controls. • Call status, duration, outcome, summary, transcript, and permitted recording playback. • Appointment management, integration health, usage/cost tracking, and audit logs. • Do-not-call/suppression list and campaign approval controls. E. Calendar Integration • Google Calendar integration with availability checks. • Correct time-zone handling and prevention of double booking. • Book only confirmed, genuinely available meeting slots. • Save appointment details and booking status in the platform. B2B AI Outbound Calling Platform — Freelancer.com Project Brief Page 3 2. Preferred Technology Stack Layer Preferred technology Frontend React / [login to view URL] / TypeScript Backend Python / FastAPI Database PostgreSQL AI voice Vapi or another suitable managed voice platform Telephony Compatible US telephony provider Calendar Google Calendar API Deployment Docker / Docker Compose; self-hosted backend Developers may propose alternatives with a clear explanation of technical compatibility, operating costs, and maintenance implications. 3. Suggested Milestones Milestone 1 — Technical assessment / proof of concept Inspect VICIdial/Asterisk, confirm the call architecture, identify dependencies and third-party costs, and demonstrate a basic test call. Milestone 2 — Working AI calling MVP Configure the voice agent, implement the backend/database foundation, place controlled test calls, and receive call webhooks. Milestone 3 — Dashboard and calendar Implement lead/campaign management, call history, dashboard analytics, and Google Calendar meeting booking. Milestone 4 — VICIdial integration Implement the verified integration path, synchronize call outcomes, and test retries and duplicate prevention. Milestone 5 — Testing and deployment Run end-to-end tests, fix issues, deliver deployment documentation, and demonstrate the complete workflow. 4. Required Deliverables • Complete source code and agreed intellectual-property/source-code handover. • Working frontend, backend, database schema, and migrations. • AI voice agent configuration and editable scripts. • VICIdial integration and documentation of the verified architecture. • Google Calendar integration. • API documentation, automated tests, and test results. • Docker/deployment configuration and .[login to view URL] containing placeholders only. • Setup, maintenance, troubleshooting, backup/recovery, and security documentation. B2B AI Outbound Calling Platform — Freelancer.com Project Brief Page 4 • Compliance launch checklist and a working end-to-end demonstration. 5. Security and Compliance Requirements • Secure authentication, role-based access, secret management, HTTPS, and audit logs. • Webhook signature verification where supported; protect credentials and redact secrets from logs. • No public exposure of database credentials or Asterisk management interfaces. • Build controls for lead authorization/consent records, calling windows, suppression, opt-outs, campaign limits, and auditability. • Review applicable US federal and state requirements, provider/carrier rules, and recording/transcription requirements before live campaigns. • Do not assume B2B status or a publicly listed number automatically makes every AI-generated call lawful. Human approval is required before production calling. 6. Testing and Acceptance Criteria • A test lead can be called through the agreed architecture and the call result is saved. • Call webhooks are authenticated where supported and processed idempotently. • Lead/campaign/call data appears correctly in the dashboard. • Meeting availability is checked and confirmed bookings appear in Google Calendar. • VICIdial synchronization is demonstrated in the agreed test environment. • Opt-out requests suppress future promotional calls. • Failure paths, retries, duplicate prevention, time zones, and emergency campaign stop are tested. • No real campaign is launched without explicit client approval. 7. Developer Qualifications • Demonstrated AI voice-agent or conversational AI development experience. • Experience with Vapi, Retell AI, Bland AI, or comparable voice platforms. • VICIdial, Asterisk, SIP, RTP, or telephony integration experience is especially important. • Python/FastAPI, PostgreSQL, React/[login to view URL], webhooks, and API integration experience. • Ability to deliver tested code, documentation, and a deployable application. 8. Questions to Answer in Your Proposal • Share relevant projects, demos, or portfolio examples. • Have you integrated AI voice agents with VICIdial or Asterisk? Describe the architecture. • Which voice and telephony providers do you recommend, and why? • What information do you need from the existing VICIdial installation? • What is your timeline for each milestone? • Provide a fixed-price estimate per milestone. • Estimate recurring third-party costs and explain what is included/excluded. • Describe your testing, security, and compliance approach. B2B AI Outbound Calling Platform — Freelancer.com Project Brief Page 5 9. Budget and Engagement Please submit a fixed-price proposal broken down by milestone. The initial priority is a reliable MVP with a clear path to production. Third-party subscriptions, telephony usage, hosting, and other recurring charges must be listed separately from development fees. A paid technical assessment/proof of concept may be awarded first. Full implementation will proceed after the architecture and proof of concept are approved. Do not submit a generic proposal. Explain the actual technical approach for connecting AI outbound calling with VICIdial and provide evidence of relevant experience. END OF PROJECT BRIEF
Project ID: 40740608
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102 freelancers are bidding on average $194 USD for this job

⭐⭐⭐⭐⭐ Build a B2B AI Outbound Calling Platform with VICIdial Integration ❇️ Hi My Friend, I hope you're doing well. I reviewed your project requirements and see you are looking for a B2B AI outbound calling platform. Look no further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for AI voice solutions. I will create a functional platform that qualifies leads, books meetings, and integrates seamlessly with VICIdial. ➡️ Why Me? I can easily do your B2B AI outbound calling project as I have 5 years of experience in AI development, telephony integration, and backend solutions. My expertise includes Python, FastAPI, PostgreSQL, and AI voice platforms. Additionally, I have a strong grip on web development and database management, ensuring a complete solution for your needs. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing with you in chat. ➡️ Skills & Experience: ✅ AI Voice Development ✅ VICIdial Integration ✅ Telephony Systems ✅ Python Programming ✅ FastAPI Development ✅ PostgreSQL Database ✅ API Integration ✅ Web Dashboard Design ✅ Docker Deployment ✅ Google Calendar Integration ✅ Error Handling ✅ Data Security Waiting for your response! Best Regards, Zohaib
$150 USD in 2 days
7.9
7.9

Hi! This is squarely in our lane — the stack you've laid out maps closely to how we build this kind of system, and the milestone structure is sensible. The one decision that shapes everything here is call origination: whether VICIdial/Asterisk bridges to the AI agent over SIP, or a managed provider like Vapi originates and syncs results back into VICIdial. Both paths work, but the right answer depends on your Asterisk version, the SIP trunk setup, and whether VICIdial stays the system of record or becomes a secondary store. That's exactly what Milestone 1 should confirm — I'd rather validate it with a working test call than commit to an architecture on paper. On the voice layer: Vapi is our first recommendation given its webhook reliability and control over conversation flow and interruption handling. Retell is a solid alternative if latency becomes a concern. Either way, the FastAPI backend handles webhook ingestion idempotently, routes outcomes to PostgreSQL, and syncs to VICIdial through whichever path survives the proof of concept. The dashboard, lead management, campaign controls, Google Calendar booking, and the compliance layer — consent records, suppression lists, opt-out handling, calling windows — are well-defined from here. Audit trail and role-based access go in from day one. Recurring costs — telephony, voice provider usage, hosting — we'd itemize separately once the architecture is confirmed. Gustavo & the DoTheCode team
$200 USD in 10 days
6.0
6.0

Hello I can build an AI powered outbound calling bot platform with automated calls AI conversations call routing lead management call recording and real time call status With 20 years of software development experience I can work with Python FastAPI OpenAI voice AI telephony APIs webhooks databases and scalable cloud infrastructure A few quick questions Which telephony provider and voice AI service are you planning to use Should the AI handle dynamic conversations qualification and appointment scheduling Do you need call recording transcripts analytics and CRM integration I’ll focus on building a reliable outbound calling platform with natural AI conversations secure API integration call tracking structured data handling and scalable workflow automation I’m available to start immediately Thanks
$130 USD in 7 days
5.7
5.7

Reaching B2B leads in the US with AI voice is tough when every detail counts. Integration errors, unreliable call flows, and dashboard confusion can easily waste hours and cost real opportunities. Juggling VICIdial sync, call outcomes, and seamless meeting bookings without the right foundation gets overwhelming fast. You can expect a robust outbound platform where AI agents qualify leads and book meetings, all tracked in a clear dashboard and synced reliably with VICIdial. First, I will review your current VICIdial and Asterisk setup to lock in the best integration path. Then, I’ll configure the AI voice agent and backend so every prospect call is smooth and results are captured. Finally, I’ll bring it all together in a responsive dashboard with real-time campaign control and calendar integration. Is there a preferred starting point for the technical review, or should we begin directly with VICIdial assessment?
$137 USD in 7 days
5.7
5.7

Hello, I’m Karthik, with 15+ years of experience in developing B2B solutions, including AI voice agents and telephony integrations. I am excited about your project for the AI-powered outbound call bot/platform and believe my expertise aligns perfectly with your requirements. Technical Approach: 1. AI Voice Agent: I will utilize a professional English-speaking AI voice, capable of handling natural conversations, qualifying leads, and booking meetings seamlessly. 2. VICIdial Integration: I will assess your current VICIdial/Asterisk setup to ensure a robust integration, synchronizing calls and outcomes effectively. 3. Backend Development: Using Python with FastAPI and PostgreSQL, I will establish a secure backend with REST APIs, ensuring data integrity and compliance. 4. Dashboard & Calendar Integration: A responsive web dashboard will be built with analytics and integrated with Google Calendar for effective scheduling. Milestones: I'll propose a clear plan, starting with a technical assessment, leading to MVP development, dashboard implementation, and final deployment. Looking forward to discussing how I can bring your project to life! Best regards, Karthik
$200 USD in 7 days
5.6
5.6

Hello, this project can be approached through a paid VICIdial/Asterisk assessment first, validating the call path before full implementation. The MVP would combine a configurable AI voice agent, FastAPI and PostgreSQL services, secure webhooks, Google Calendar availability checks, suppression controls, and a responsive React dashboard. I would prioritize idempotent event processing, consent and audit records, retry handling, emergency campaign stopping, and Docker-based deployment. The assessment should produce a verified architecture, proof-of-concept call, integration risks, and a milestone-ready implementation plan. Relevant documentation would cover testing, security, compliance controls, operations, and third-party cost boundaries. Regards, The development team
$110 USD in 4 days
5.0
5.0

Could you provide insights into the specific VICIdial/Asterisk versions currently in use? Understanding this will help in determining the best integration approach. I recommend assessing the existing telephony provider's compatibility with your AI solution before finalizing any architecture, as this is crucial for seamless operation. I have over 6 years of experience in full-stack development, specifically with Python, PostgreSQL, and API integration, which aligns perfectly with the requirements of your AI outbound calling platform. My approach involves conducting a thorough technical assessment of the current setup, implementing the AI voice agent with customizable scripts, and ensuring robust integration with VICIdial while maintaining secure and efficient data handling through a well-structured backend. Please feel free to reach out to me. I look forward to working with you. Best regards, Billy Bryan
$30 USD in 10 days
4.7
4.7

Hello, Main risk is call handling fidelity: outbound conversations must detect interruptions, update VICIdial call outcomes, and book meetings without human handoffs. If the AI misdetects hangups or overlapping speech it will create bad leads and compliance exposure. I design for real-time endpoint detection, short turn TTS/ASR buffers, and explicit fallbacks to human agents to avoid that. I have built several enterprise-grade voice agents and web dashboards using Python, FastAPI, PostgreSQL, React, Asterisk and VICIdial-compatible SIP trunks. My work focuses on reliable lead synchronization, transactional APIs for call state, and analytics that map call outcomes to lead records. I will reuse proven patterns: a microservice for call orchestration, a speech gateway handling ASR/TTS and DTMF, and a secure API layer that mirrors VICIdial lead states. I will start by delivering an AI voice prototype on a staging VICIdial instance that runs a single sales script, records outcomes back to VICIdial, and books Google Calendar events. The first technical step is a short discovery to capture your VICIdial version, dialplan, and preferred SIP/voice provider so I can match codecs and webhooks. - Do you have a staging VICIdial with API or DB access for development? - Which US PSTN caller ID ranges and daily call volumes should I size for? Happy to connect for a short call to walk through the approach. @melopgabriel
$30 USD in 1 day
4.6
4.6

An AI voice agent plugged into your existing VICIdial/Asterisk setup is exactly where AI calling is going. Your brief is clear: an AI Voice Agent, a React/Next campaign dashboard, and FastAPI services behind it. That is precisely the kind of AI system I build. I would wire the AI voice agent to your Asterisk dialer over SIP, stream audio to a conversational AI service tuned for your B2B pitch, and build the campaign dashboard in React/Next with call logs, outcomes and recordings in PostgreSQL. Everything containerised with Docker, plus the end-to-end demo and a compliance checklist covering consent and recording. I run Jyotish AI, a live AI-powered consumer app, so conversational AI is my home ground. That experience maps directly onto an AI voice agent that has to sound natural on real calls. Two quick questions: which VICIdial and Asterisk versions are running? And is the compliance checklist mainly around consent and call recording? Happy to walk through the architecture on a quick call this week.
$195 USD in 10 days
4.6
4.6

Docker and SIP integration is the part that usually breaks these outbound bots under real call volume. I would build it on FastAPI with a Postgres queue for call state and a proper SIP trunk setup so nothing drops mid-call. Can start today. Working version in about 5 days. This estimate is based on the brief, we will lock in real numbers once we talk through the full flow. Want me to send a quick plan?
$150 USD in 10 days
4.1
4.1

Hi there! The key challenge is connecting an AI voice agent with VICIdial/Asterisk reliably while keeping calls, webhooks, lead data, appointments, opt-outs, and retries fully consistent. The architecture should be proven first so you do not build around an unverified SIP or provider setup. I have experience with Python, FastAPI, PostgreSQL, REST APIs, webhooks, Docker, conversational AI, and third-party API integrations. I can build the backend, dashboard, AI calling workflow, calendar integration, and data layer with security and idempotency in mind. I would start with the technical assessment and VICIdial/Asterisk review, then create a controlled proof of concept for the call path. After validating the architecture, I’ll build the AI agent, campaign and lead system, dashboard, Google Calendar booking, VICIdial synchronization, audit logs, suppression controls, and automated tests. I’ll also document deployment and keep telephony and AI provider costs separate from development costs. For the voice layer, I would evaluate Vapi, Retell, or another suitable provider based on compatibility, latency, call quality, webhook support, and operating cost rather than assuming one provider will work. check our work https://www.freelancer.com/u/ayesha86664 Which VICIdial and Asterisk versions are currently installed, and can you provide access to a staging environment for the initial assessment? Let me know if you’re interested & we can discuss it. Best Regards Ayesha
$115 USD in 3 days
3.6
3.6

Nice to meet you ,The requirements of your project match my areas of work and skills, to introduce myself. My name is Anthony Muñoz and i am the lead engineer for DS Pro IT agency. I have worked for over 10 years as a Full-Stack and software development engineer and have successfully done multiple jobs. It will be a pleasure to work together to make your project. Feel free to discuss about the project with me, greetings.
$141 USD in 7 days
3.8
3.8

Your project on building an AI-powered outbound calling platform with VICIdial integration really caught my attention. The challenge of managing interruptions, voicemails, and making sure that immediate opt-out handling is important for a smooth user experience, and I’ve seen many projects stumble here, especially with call failure handling and making sure compliance with US regulations. From what you described, it looks like you need a blend of a reliable backend with Python and FastAPI, alongside those responsive React frontends. I plan to start with a technical assessment of your existing VICIdial setup, to confirm the best integration approach. And then I’ll build the AI voice agent and backend, making sure solid error handling and efficient call management. I’ll also implement the Google Calendar integration for smooth meeting bookings, so my bid for this project is 119 USD and I'm ready to get started on this right away. Rajavel Python | FastAPI | React | VICIdial Integration
$119 USD in 5 days
2.2
2.2

The first milestone should be a paid PoC because VICIdial/Asterisk ↔ AI voice compatibility must be proven before the rest is locked in. I’d inspect versions/SIP setup, then validate either provider-originated calls synced to VICIdial or Asterisk-originated SIP/media into Vapi/Retell. I haven’t shipped VICIdial in production, so I won’t fake that proof; my relevant work is AI/backend/API automation with webhooks, idempotency and dashboards. Estimate: M1 $100/3d, M2 $200/1wk, M3 $300/1wk, M4 $300/1–2w, M5 $200/4d. Telephony/voice/hosting usage separate.
$30 USD in 7 days
2.0
2.0

Hello, I can deliver what you need. I understand your project details. I will follow instructions and keep you updated. I am a skilled freelancer with 10+ years of experience in Python, API Integration, AI Development and I have completed similar projects. Visit my profile to check my latest work and reviews from past clients. I would love to connect in chat to discuss details. Talk soon, Olusoji
$30 USD in 7 days
1.7
1.7

Booking meetings straight into VICIdial's call disposition fields is the part that usually trips people up — the outcome schema there isn't built for AI-generated qualification data, so I'd map that early rather than bolt it on later. I've built an outbound voice agent using offline STT with structured call outcome logging, so the qualify-and-log flow is familiar. Is VICIdial already running on your infrastructure, or does it need to be stood up as part of this scope?
$90 USD in 10 days
1.5
1.5

Hello, Your main risk is not the dashboard. It is proving a reliable, compliant call path between VICIdial, Asterisk, the voice agent, and synchronized outcomes before full development. I would start with the paid proof of concept: inspect VICIdial and Asterisk versions, AMI and API access, SIP configuration, carrier, codecs, firewall, recordings, and lead workflows. I would test both provider originated calls and Asterisk originated SIP media, then document the verified architecture. For the MVP, I recommend Vapi with a compatible US carrier, subject to proof of concept results. Python and FastAPI would handle authenticated webhooks, idempotency, retries, PostgreSQL records, suppression, and Google Calendar booking. Artificial Intelligence call logic would classify outcomes and create summaries, while React.js and JavaScript support the operational dashboard. My relevant work covers LLM automation, FastAPI services, React applications, RAG, vector search, and cloud SaaS. For VICIdial evidence, I prefer delivering a working test call rather than overstating an unverified deployment. Indicative schedule is one week assessment, three weeks MVP, two weeks dashboard, two weeks integration, and one week testing. Fixed milestone fees and recurring voice, carrier, hosting, and model costs can be finalized after assessment. I can begin with the controlled test call and architecture report. Gabriel
$155 USD in 4 days
1.7
1.7

Hi, Your project doesn't need someone who simply follows the brief. It needs someone who understands what you're trying to achieve and figures out how to get you there. That's how I approach projects. Before writing code or jumping into execution, I want to understand the problem, the goal, and what success actually looks like for your business. I've spent the last several years turning business problems into working digital products, leading developers and designers, managing projects from idea to delivery, and delivering 40+ web and mobile projects. Do I know everything? Absolutely not. But I know how to solve problems. If I don't have the answer, I'll find it. I'll research, learn, test, ask the right questions, and keep working until we have a solution. And once I'm on board: It's our business. Our problem. Our responsibility. I'll give you my honest opinion, challenge ideas when I see a better approach, and never agree just for the sake of keeping things comfortable. I work with clients because I care about building things that succeed. If you're looking for someone who will take ownership rather than simply complete tasks, I'd be happy to learn more about what you're building.
$196 USD in 2 days
1.1
1.1

Hey — saw your post about building a B2B AI outbound calling platform. One common pain point with these bots is making the AI sound natural enough to keep prospects engaged without sounding robotic. Quick question: Do you have a preferred AI voice tech in mind, or are you open to recommendations based on call quality and latency? I’ve worked on AI call integrations that balance natural conversation flow and reliable call automation. Send over any specs or current flows you have, and I’ll take a look to see how we can get this running smoothly.
$140 USD in 7 days
0.9
0.9

As an accomplished Full-stack Web Developer with extensive expertise in AI development and Backend operations I believe I am the absolutely perfect fit for your B2B AI Outbound Calling Platform project. With years of experience in building scalable and efficient websites and mobile apps, which include integrating APIs, I am proficient in the use of key developments tools such as Python, PostgreSQL, and Docker that align seamlessly with your preferred tech stack. In conclusion, my adherence to clean, scalable & maintainable code combined with my dedication to delivering secure solutions align seamlessly to ensure that your B2B AI outbound calling platform is built not only effectively but is also robustly functional. I look forward to contributing my impressive skill-set alongside my knack for exceeding client expectations towards a final product that will generate impressive results for your unique business needs. Lets turn youre idea into reality!
$100 USD in 3 days
0.0
0.0

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