UseCortana
Multi-channel AI sales agent platform (AgentKong)
Real-time voice and text agents with an agentic CRM layer underneath. First commit to MVP in 4 weeks. First paying customer the month after.
Next.jsRestackLiveKit
AI SaaS development agency
We build AI products that survive beyond the demo.
Production-ready AI SaaS, agentic platforms, and multi-tenant software for founders who need a real product, not another prototype.
FusionSync is an AI SaaS development agency that ships production-ready software from architecture to deployment. AI SaaS development, agentic voice and chatbot platform builds, multi-tenant SaaS architecture, and MVP delivery using Next.js, TypeScript, PostgreSQL, Stripe, OpenAI, Claude, LiveKit, and Restack.
Shipped products
Real software in production, not mockups
Three builds we shipped from first commit to paying users. Dashboards, auth, billing, and AI integrations included.
4 weeks to MVP
IGThreadly
Instagram comment and DM automation SaaS
Turns inbound social activity into qualified, CRM-ready leads with AI intent routing and multi-turn agent inbox.
Next.jsMeta Graph APIOpenAI
View product page →
MeisterFlow
Multi-tenant booking and invoicing platform
Scheduling, multi-tenant data isolation, and automated billing for a home-services client. Active in production today.
Next.jsPostgreSQLStripe
What we build
Three kinds of AI software products
Pick the shape of product you need. We architect and ship the full stack, not a thin integration layer.
AI SaaS and MVPs
Auth, Stripe billing, admin panels, and real AI features wired into a product your users can log into on day one.
MVPEarly SaaSStripeAuth
Agentic voice and chat platforms
Voice plus text agents, agentic CRM logic, multi-channel orchestration, and production call infrastructure.
LiveKitVoice AIAgentic CRMRestack
Multi-tenant production systems
Tenant isolation, permissions, monitoring, and deployment infrastructure built before feature count grows.
Multi-tenantPostgreSQLPrismaVercel
Why founders choose us
Built for production, not demo day
Architecture first
Database structure, multi-tenancy, scalability, security, and expansion paths are designed before development starts.
Production ready
Auth, billing, monitoring, error handling, permissions, and deployment infrastructure from day one. Not a prototype that breaks under real users.
AI-assisted engineering
Cursor, Claude, and modern AI tooling accelerate delivery without sacrificing architecture quality. Structured engineering, not vibe coding.
Engagement tiers
Clear scope, clear timeline, clear price band
Every tier ships deployed and live. Scope maps to how much product you need validated or in market.
Tier 1 · Proof of Concept
$500–1,500
1 week
Single core workflow, one user type, basic AI integration, deployed and live.
Tier 2 · MVP / Early SaaS
$2,000–3,000
2 weeks
Multi-feature product, auth, Stripe billing, multi-tenant architecture if needed, real AI integration.
Tier 3 · Full Agentic Platform
$4,000–5,000
3 weeks
Voice and text AI agents, agentic CRM logic, multi-channel orchestration, full production architecture.
How we work
Architecture → build → deploy
Three phases. No six-month discovery deck. You get a working product with the plumbing already in place.
- Step 1
Architecture
System design, data model, tenancy model, integrations, and delivery plan locked before code ships.
- Step 2
Build
Feature development with AI-assisted velocity and production-grade patterns: auth, billing, AI layers, and UI.
- Step 3
Deploy
Live on Vercel (or your stack), monitoring in place, handoff docs, and a product ready for real users.
Tech stack
The stack we ship on
- Next.js
- React
- Node.js
- TypeScript
- PostgreSQL
- Prisma
- Supabase
- Stripe
- OpenAI API
- Claude API
- LiveKit
- Restack
- Vercel
Also available
Productized inbound system for Instagram and WhatsApp
We also install a done-for-you Instagram-to-WhatsApp inbound operating system for event and experience brands. Separate offer, same engineering standard.
View Instagram + WhatsApp inbound systemBuilt by operators
Built by a Founder Who Actually Implements
Shubham Kashyap
Founder, FusionSync AI
- Top Rated Plus on Upwork
- Revenue system implementation
- CRM and AI automation architecture
- Founder-led delivery
Work with FusionSync AI
Ready to ship a product that survives real users?
Book a call. Bring your idea, scope, and timeline. We will map architecture, tier, and delivery before you commit.
Frequently asked questions
What founders ask before booking a build call: ownership, stack, tiers, and how we differ from generic agencies.