Voice Agents That Answer, Book, and Route - 24/7
From AI phone agents and IVR replacements to real-time transcription pipelines - hire verified voice AI developers who build natural-sounding agents on Twilio, LiveKit, Whisper, and ElevenLabs.
What Is Voice & Conversational AI?
Voice AI turns phone lines and voice interfaces into software you can program. Modern speech models transcribe callers in real time, large language models understand what they want, and neural text-to-speech answers in a natural voice - with round-trip latency low enough to hold a real conversation. The result is an agent that answers every call on the first ring, books appointments, qualifies leads, and routes edge cases to a human.
Building one that feels good to talk to is real engineering. It means streaming audio over WebRTC or telephony rails like Twilio, managing interruptions and barge-in, keeping latency under a second, grounding the agent in your business data, and logging every call outcome to your CRM. The difference between a demo and a production voice agent is exactly this plumbing.
Whether you're replacing a phone-tree IVR, adding an after-hours AI receptionist, running outbound reminder campaigns, or transcribing and analyzing every support call - this category connects you with specialists who ship voice systems that customers actually stay on the line with.
When Do You Need Voice AI?
Common scenarios where a voice agent pays for itself in missed-call revenue and staff hours.
AI Phone Agents & Receptionists
An agent that answers every inbound call, handles FAQs, takes messages, and books appointments straight into your calendar - no hold music, no missed calls.
IVR Replacement
Swap the "press 1 for sales" tree for a natural-language agent that understands what callers actually say and routes them to the right place first time.
Speech-to-Text Pipelines
Transcribe calls, meetings, and voicemails at scale with Whisper or Deepgram, then feed the transcripts into search, analytics, or compliance workflows.
Outbound Calling Campaigns
Appointment reminders, renewal notices, and lead follow-ups placed automatically, with outcomes logged to your CRM and humans looped in on interest.
Call Analytics & QA
Every support call scored for sentiment, compliance phrases, and resolution - surfacing coaching moments and product issues without listening to a single recording.
In-App Voice Assistants
Real-time voice interfaces inside your product - hands-free data entry, voice search, and guided workflows built on WebRTC and streaming speech models.
Example Projects
Real project briefs showing the kind of voice AI work our specialists deliver.
AI Receptionist for a Dental Group
Built a Twilio + Retell voice agent answering three clinic lines, booking and rescheduling into the practice calendar, answering insurance FAQs, and escalating emergencies to on-call staff. Handled after-hours calls that previously went to voicemail.
IVR Replacement for a Logistics Company
Replaced a five-level phone tree with a natural-language agent that identifies callers, reads live shipment status from the TMS, and routes exceptions to dispatchers. Cut average call-handling time significantly and eliminated menu abandonment.
Call Transcription & QA Pipeline
Whisper-based pipeline transcribing 2,000+ support calls a month, scoring each against a QA rubric with an LLM, and pushing flagged calls into a review dashboard with timestamps and summaries.
Outbound Appointment Reminder Agent
Automated reminder and confirmation calls for a physiotherapy chain, with natural rescheduling handled in-call, SMS fallback, and every outcome written back to the booking system. Reduced no-shows measurably in the first month.
What You'll Get
- A production voice agent deployed on your phone number or in your app
- Conversation design: prompts, personas, interruption and escalation handling
- Telephony wiring on Twilio, LiveKit, Retell, or Vapi with call recording
- Speech pipeline: streaming STT (Whisper / Deepgram) and neural TTS (ElevenLabs)
- CRM and calendar integrations so every call outcome lands in your systems
- Latency tuning for natural, sub-second conversational turns
- Call logs, transcripts, and an analytics dashboard for outcomes
- Runbook covering monitoring, failover to humans, and prompt updates
Tech Stack & Tools
Ecosystem at a glance
Skills You'll Get Access To
Every professional matched to your project is verified in these core competencies.
Scope & Timeline Guide
Three levels of scope to help you plan your build. Timelines and effort depend on call volume, integrations, and how much conversation logic the agent needs.
Single-purpose agent - after-hours answering or a reminder campaign - on one phone number with basic logging
Full receptionist or IVR replacement with booking, CRM write-back, escalation to humans, and call analytics
Multi-line or multi-language deployments, high-volume outbound, deep system integrations, and compliance recording
Wondering what your build would cost?
Every project is scoped and quoted individually by a verified specialist, so you pay for your requirements - not a generic rate card. Compare live service listings from verified professionals, or tell us what you are building and get a tailored quote or a walkthrough demo.
What REWORK Provides
We don't just connect you with talent - we support the entire project lifecycle.
AI Brief Generation
Describe your call flows in plain language and our AI generates a detailed project brief with scope, deliverables, and budget estimates.
Escrow Protection
Funds are held securely until milestones are met. You only pay for completed, approved work.
Professional Matching
We match you with verified voice AI developers based on your telephony stack, call volume, and budget.
Project Management Tools
Built-in milestone tracking, file sharing, and communication tools to keep your project on track.
Start Your Voice AI Project Today
Describe your call flows, get an AI-generated project brief, and get matched with a verified voice AI developer - all with escrow-protected delivery.