AI · SaaS · 2026
VoxSynth — AI Voice Agents for Sales, Support & Booking
Human-sounding AI voice agents that make and take phone calls 24/7 — sales qualification, customer support, appointment booking, and real estate follow-up. Live in-browser demo, no signup.
- Time to launch
- 3–7 days
- Live persona agents
- 4
- Uptime
- 24/7
- Signup required to demo
- 0
- Client
- Ashik Dev. — internal product
- Year
- 2026
- Timeline
- 6 weeks (design → live demo)
- Categories
- AISaaS
- Role
- Founder & Lead Engineer
- Services
- AI voice agentsConversation designCRM & calendar integrationsTelephonyWeb demo
- Stack
- TanStack StartReactTypeScriptVapiBland AIRetellGHLTwilioSupabaseTailwind
The challenge
Businesses lose leads after hours and burn agents on repetitive calls. Existing "AI callers" sound robotic, latency-heavy and impossible to trial without a sales call. Prospects wanted to hear the agent before ever booking a demo.
My approach
Built a browser-native voice playground on TanStack Start with four persona agents (Ava, Alex, Nova, Rio) covering sales, support, booking and real estate. Wired a low-latency stack across Vapi / Bland / Retell / GHL, chosen per use case, with CRM + calendar hooks. Shipped SEO-ready landing (FAQ + SoftwareApplication JSON-LD), tiered pricing, and an Upwork-compliant portfolio banner.
Key features
- In-browser live demo — talk to 4 persona agents, no signup or card
- Sales, support, booking and real estate playbooks out of the box
- Vapi / Bland / Retell / GHL — picked per use case for latency & cost
- CRM + calendar integrations (GHL, Google Calendar, HubSpot)
- Human-sounding voices with barge-in, interruption handling and memory
- Tiered pricing (Starter / Growth / Enterprise) with clear scope
- SEO-optimized: FAQ + SoftwareApplication JSON-LD, OG/Twitter cards
- Upwork portfolio-compliant hire flow (all contracting via Upwork)
Outcome
Live demo converts curious visitors into booked calls without a sales rep on the line. Typical agent launches in 3–7 days end-to-end (script → voice tuning → CRM/calendar → go-live), and demo-to-consult conversion beat the previous static landing by a wide margin.