Upwork portfolio piece by SM Ashiqurzamman (SyntheStudio). All hiring and communication happens on Upwork — view my Upwork profile.
VoxSynth
by SyntheStudio
Hire on Upwork
Live agents online — try any of them now

AI voice agents that sound human and never sleep.

VoxSynth by SyntheStudio builds custom AI voice agents that make and take calls 24/7 — cold outreach, inbound support, appointment booking, and real-estate qualification. Powered by Vapi, Bland AI, and ElevenLabs.

Try the live demoSee pricing
No signup for demo Deploy in 7 days 30-day support included
📞
Ava · Outbound SDR
Cold call · 00:47
live
Ava
Hi, this is Ava from SyntheStudio. Do you have 30 seconds — I promise it's worth it.
Prospect
Uh, okay… what's this about?
Ava
We help agencies like yours book 20+ qualified meetings a month using AI voice agents. Would Tuesday at 2pm work for a quick demo?
Prospect
Tuesday works. Send me the invite.
Outcome: Meeting booked ✓Sentiment: Positive

Built on the platforms your team already trusts

VapiBland AIRetellElevenLabsTwilioOpenAIGHLMake

Everything you need to launch a voice agent

From script design to production — VoxSynth ships a full-stack voice agent, not just a chatbot with a voice glued on.

Human-sounding voice

Natural intonation, backchannels, and interruption handling — trained per brand.

CRM & calendar sync

Two-way sync with GHL, HubSpot, Google Calendar, Cal.com, Salesforce.

40+ languages

English, Spanish, French, Arabic, Bengali, Hindi and more — same agent.

Sub-second latency

Streaming ASR + LLM + TTS pipeline tuned to under 800ms average.

Compliance-ready

HIPAA, SOC 2 friendly stacks, call recording consent, PII redaction.

Custom voice clone

Match your best agent's voice with 3 minutes of clean audio.

Built for the calls that drive revenue

Pick a use case — or bring your own. VoxSynth adapts to any script.

Outbound sales

Cold calls, lead qualification, appointment setting on autopilot.

Inbound support

24/7 tier-1 support with ticket creation and smart escalation.

Clinic booking

HIPAA-friendly scheduling, confirmations, and reminders.

Real estate

Buyer/seller qualification and property-viewing bookings.

Live in 7 days — not 7 months

Our repeatable delivery process gets your first agent answering calls in a week.

  1. 01
    Plan the script
    We map every call flow — greeting, objections, close, handoffs.
  2. 02
    Build the agent
    Voice, brain, and tools wired on Vapi / Bland / Retell with your data.
  3. 03
    Connect your stack
    CRM, calendar, Twilio number, Slack alerts — all tested end-to-end.
  4. 04
    Test & tune
    You call the agent, we tune. Ship when it feels indistinguishable from your best rep.
  5. 05
    Go live
    We launch, monitor KPIs, and iterate for 30 days post-launch. Free.
Live demo dashboard

Talk to a real AI agent right now.

Open the demo dashboard, pick an agent, hit Start call, and have a full spoken conversation — no signup, no download, all in your browser.

Open the demo dashboard
📞
Ava
Outbound Sales SDR
Start call
🎧
Max
Inbound Customer Support
Start call
🏥
Sophia
Clinic Appointment Scheduler
Start call
🏡
Ryan
Real Estate Inquiry Agent
Start call

Straightforward pricing

One-time build cost. No per-minute markup — you keep your own Vapi/Bland account.

Starter
$150
One agent, one script, one integration.
  • 1 voice agent
  • 1 CRM or calendar integration
  • Up to 3 call flows
  • 7-day delivery
  • 7-day support
Hire on Upwork — Starter
Most popular
Growth
$450
Most popular. Full production-ready deployment.
  • Up to 3 voice agents
  • Full CRM + calendar sync
  • Custom voice tuning
  • Multilingual (2 languages)
  • 30-day support
Hire on Upwork — Growth
Scale
$1,200
Multi-agent voice stack for teams.
  • Unlimited agents
  • Custom voice clone
  • Advanced analytics
  • Priority support (60 days)
  • Dedicated engineer
Hire on Upwork — Scale

What this stack can do

Illustrative sample outcomes — not client testimonials

"SDR agent booked 34 discovery calls in the first two weeks with zero training overhead."
B2B agency scenario · Outbound sales use case
"Clinic reception ran 24/7 without a new hire; reminder flow cut no-shows by ~41%."
Dental clinic scenario · Appointment booking use case
"Human-sounding voice — most callers didn't realize they were talking to an AI."
Inbound support scenario · Customer support use case

Questions, answered

How fast can we go live?+

Most Starter/Growth projects go live in 7 days. Scale takes 2–3 weeks.

Whose Vapi/Bland account do you use?+

Yours. You own the account, the number, and the data — we build on top.

Can it speak my language?+

Yes — 40+ languages including Bengali, Hindi, Spanish, French, and Arabic.

Do you offer post-launch support?+

Growth includes 30 days free. Scale includes 60 days plus a dedicated engineer.

Can the agent transfer to a human?+

Yes. Warm transfer, Slack alerts, or a live queue — we wire it to your workflow.

Ready to hear your new agent speak?

Try the live demo, then hire SM Ashiqurzamman (SyntheStudio) directly on Upwork — all scoping, contracts, and payments happen on-platform.

Try the live demo Hire me on Upwork