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Replace hold music and phone menus with a voice agent that answers every call. Talk to ProsperaSoft engineers about building a production-ready AI voice agent for your business.
AI Voice Agent Development Services
A voice agent combines speech-to-text, a language model with tools, and streaming text-to-speech over telephony or WebRTC. We build the whole chain: call handling with Twilio, Vonage, SIP trunks or LiveKit, transcription with Deepgram, Whisper or cloud speech APIs, reasoning with OpenAI, Claude or open-source LLMs, and voices from ElevenLabs, OpenAI or Azure.
Where a platform such as Vapi or Retell AI fits, we configure and extend it; where you need full control over data, cost or latency, we build a custom pipeline. Agents connect to your CRM, booking and order systems through APIs and MCP servers, so they complete the task instead of taking a message.
Why Build Your Voice Agent with ProsperaSoft
Voice is less forgiving than chat. Callers interrupt, talk over the agent, use accents and call from noisy places, and every 300 milliseconds of delay is noticed. We engineer for latency, barge-in, turn detection and fallbacks, and we test with real call recordings before go-live.
Our team has hands-on experience with real-time audio, speech recognition and AI voice generation in production, and writes regularly about the problems that break voice AI, from ElevenLabs voice consistency to Whisper accuracy on noisy audio.
What We Build
Inbound Call Agents
Answer support, order-status and booking calls 24x7, resolve common requests end to end and route the rest with a summary.
Outbound Voice Agents
Appointment reminders, lead qualification, surveys and follow-ups with consent handling and do-not-call rules.
Voice Agents on Vapi, Retell or LiveKit
Platform-based agents configured, extended with custom tools and connected to your systems when speed to launch matters.
Custom Real-Time Voice Pipelines
Streaming STT, LLM and TTS on your own cloud for full control of data residency, cost per minute and latency.
Telephony and Contact Center Integration
Twilio, SIP, Amazon Connect, Genesys and CCaaS integration with warm transfer, call recording and CRM logging.
Testing, Monitoring and Analytics
Scenario tests, call scoring, transcripts, sentiment and containment dashboards so you can see what the agent resolves.
Where Voice Agents Pay Off
Customer Support Lines
Order status, returns, password resets and FAQs handled without a queue.
Appointment Booking
Clinics, salons, field services and dealerships booking straight into the calendar.
Sales and Lead Qualification
Instant call-back on new leads, qualification questions and meeting booking.
After-Hours Coverage
Every call answered at night and on weekends, with urgent cases escalated.
TECHNICAL EXPERTISE
Frequently asked questions
What is an AI voice agent?
An AI voice agent is software that talks with callers in natural language over the phone or web, understands what they need and completes tasks such as booking, looking up an order or updating a record, handing over to a person when needed.
How fast does an AI voice agent respond?
A well-built agent responds in under a second. We reduce latency with streaming speech recognition and synthesis, short prompts, fast models, regional hosting and caching of common answers.
Should we use Vapi or Retell AI or a custom voice pipeline?
Platforms are faster to launch and fine for many use cases. A custom pipeline makes sense when you need strict data residency, lower cost at high call volumes, special telephony or full control over models. We help you choose and can start on a platform and migrate later.
Can the voice agent transfer calls to a human?
Yes. We implement warm transfer to your agents or call center with a written summary of the conversation, and rules for when the AI must hand over, such as complaints, payments or uncertainty.
Which languages and accents are supported?
Most major languages are supported by current speech models. We test with recordings from your real callers, tune vocabulary for product and place names, and choose voices that suit your brand and market.