FusionSync

FusionSyncAI

Our story

We build the tech layer agencies cannot ship alone

FusionSync started in production: CRM bridges, voice infrastructure, and software that had to survive real client traffic. Agency owners with paying clients kept showing up with a tech gap they could not fill. That is what we built the company around.

Shubham on the partnership model and who we build for.

“Don't build a product to start a business. Build a business first, then earn the product.”
Shubham Kashyap, founder
Our story

From production work to partnership model

We started by shipping software that had to work on day one. Agency owners with clients who needed tech they could not deliver became the focus. This is how that happened.

01

The gap

Agencies win clients. Then clients ask for software.

Marketing agencies, consultants, and vertical operators are good at getting results. Their clients trust them. Then the client asks for something the agency cannot deliver: a CRM bridge into practice software, a white-label patient workflow, an AI product the agency can resell.

Say no and you lose the contract. Patch something together and you lose trust. Hire a dev team and margins disappear before the second client signs.

That tension is why FusionSync exists. Not to sell software to strangers. To partner with agency owners who already have clients and need tech delivered under their brand.

02

Where we started

Production systems, not pitch decks

FusionSync began in Mohali, India, doing the unglamorous work that has to work on day one: syncing CRMs, routing voice calls, wiring automations, and shipping full-stack products for founders who could not afford downtime.

Shubham led delivery from the first engagement. The team stayed small on purpose. Everyone here touches production code, integrations, and the edge cases that only show up when a real client goes live.

Upwork became where repeat clients found us. Long retainers, fixed-price SaaS builds, and clients who came back because the work held up in production, not because the slide deck looked good.

Top Rated Plus on Upwork · $20k+ partner engagements · 35+ deliveries shipped

03

Who we work with

Dental agencies, SaaS founders, vertical operators

The same conversation kept coming back. An agency owner or founder with clients, deep domain knowledge, and a tech gap they could not close in-house. We build the product, integrations, and rollout while they keep the relationship and the revenue.

A UK dental agency needed CRMBridge-style connectors into Exact and Dentally plus GHL and n8n fulfilment. Matei needed a $24,500 AI sales platform for his audience. Guliver needed multi-tenant booking software for Swiss home-service operators. Patrick needed underwriting workflows built around how deals actually move.

Different countries and stacks. Same deal: they bring the clients and market context. We build, integrate, and deliver under their brand.

04

What we became

A phased partnership model, not a dev shop

We formalized what was already working. Free POC on the proven stack so you can pitch clients you already have. Per-client rollout only after someone pays you. White-label vertical software when the base justifies it. Optional ownership at 25 and 100 active clients.

You stay the face. We stay invisible. We never compete for your end clients. One partnership conversation can fulfil every account in your base.

The playbook replicates by geography too. UK dental becomes US dental with a new local partner and new integration targets. Same model, new market.

Partnership proof

Real clients. Real builds.

Agency owners and founders who already had paying clients. We shipped the software, integrations, and rollout behind their brand.

White-label fulfilment

PolarBuild · Nick Kumatr

Nick Kumatr runs PolarBuild, a UK dental marketing agency that wanted owned IP in client acquisition, not another campaign-only retainer.

Validated n8n + GHL + CRM Bridge stack, then moved toward bespoke Client Acquisition System software under the agency brand.

CRMBridgeExactDentallyGHLn8n
Read the case study →
Creator monetization

UseCortana · Matei Parvu

An AI creator in Canada needed a production SaaS platform his audience could buy, not a prototype.

$24,500 fixed-price build. Client quote: respectful, knowledgeable, honest and smart.

Next.jsVoice AIVAPIAgentic CRM
Vertical SaaS

MeisterFlow · Guliver Kalamba

A Swiss operator productizing home-service booking needed architecture that could carry tenants, billing, and SEO.

Live product at app.meisterflow.ch with ongoing build partnership.

Next.jsSupabaseStripeMulti-tenant
Domain-led software

Real estate underwriting · Patrick Ampem

Patrick brought weeks inside deal documentation and collections. We built software around how underwriters actually work.

Custom intake, document handling, and CRM-connected ops in private beta.

WorkflowDocumentsCRMVertical SaaS

Client video testimonial

Hear it from the MeisterFlow founder

Guliver Kalamba runs MeisterFlow for Swiss home-service operators. FusionSync built the multi-tenant booking, invoicing, and SEO platform he ships today on app.meisterflow.ch.

“Building a SaaS platform is challenging. Shubham consistently came up with smarter, more scalable solutions and was always thinking several steps ahead.”

Guliver Kalamba

MeisterFlow owner · Switzerland

View MeisterFlow case studyOpen live product
Timeline

How the model took shape

From first production builds to a formal partnership model agencies can resell.

2024Step 1

Founded on production delivery

FusionSync focused on CRM integrations, voice AI, automation, and full-stack software that had to survive real traffic from day one.

2024Step 2

Repeat clients across verticals

LogoArena, UseCortana, MeisterFlow, and domain-led builds proved the team could own architecture, delivery, and long-term product work.

2025Step 3

Partnership model formalized

Free POC, tiered per-client rollout, white-label software path, ownership milestones, and ongoing white-glove fulfilment became the default offer.

2026Step 4

Geography-first replication

Same vertical, new markets: UK dental to US dental with local integration partners and a repeatable agency playbook.

How we partner today

Qualify → POC → rollout → software → own

Five steps. Same sequence on every engagement. Implementation starts only after your client pays you.

  1. 1

    Qualify the fit

    You have paying clients or closable prospects in one vertical and a tech gap you cannot fill in-house.

  2. 2

    Free POC

    Three-day working demo on GHL, n8n, and the integrations your market needs. You pitch it to clients you already have.

  3. 3

    Per-client rollout

    When a client pays you, we implement. Tier 1 to 3 scope. Volume discounts as your active base grows.

  4. 4

    Vertical software

    Production-grade product under your brand: auth, billing, tenant isolation, and UI your clients see as yours.

  5. 5

    Optional ownership

    At 25 and 100 active clients you can own the software for your geography or globally. Or stay on fulfilment indefinitely.

Division of work

You stay the face. We stay invisible.

You sell and support. We build, integrate, and implement. We never pitch your clients.

You (the agency owner)

  • Client relationships and trust
  • Vertical and geography knowledge
  • Local software and compliance context
  • Sales to your existing base

FusionSync (silent tech partner)

  • Product architecture and core build
  • Integration bridges and automation
  • White-glove implementation per client
  • Replication into new geographies
The team

Small team. High ownership.

Shubham leads every partnership. Harsh, Vishal, Saurav, and Piyush handle integrations, positioning, product surfaces, and AI delivery. No account managers buffering you from the people who ship.

Shubham Kashyap

Shubham Kashyap

CEO · Tech partner

Leads partnerships, architecture, and what ships in production for every agency engagement.

View founder profile
Harsh Kashyap

Harsh Kashyap

Automation developer

Builds integrations, routing, and edge cases that survive real client traffic.

Vishal Chauhan

Vishal Chauhan

Sales & marketing

Maps partner needs to delivery scope and keeps positioning aligned with shipped work.

Saurav Kaushal

Saurav Kaushal

Full stack developer

Ships product surfaces and tooling that make fulfilment easier to operate and extend.

Piyush Kashyap

Piyush Kashyap

Full Stack AI SaaS Developer

Delivers AI SaaS products and intelligent AI agents built for real-world business impact.

View profile
Client feedback

What clients said after we shipped

Unedited Upwork review screenshots from SaaS, voice AI, workflow automation, and full-stack projects. Ratings, scope, and quotes as clients left them.

Client review screenshot: AI Sales Bot and SaaS Web App project valued at $24,500 fixed price. Client quote: Respectful, knowledgeable, honest and smart.
5.0$24,500

AI Sales Bot / Chat Bot | SaaS Web App

“Respectful, knowledgeable, honest and smart. Good character and good work ethic combined for a great experience.”

5.0 review on a $24,500 AI sales bot and SaaS web app build.

Client review screenshot: AgentKong hourly engagement: $3,915 across 131 hours at $30 per hour. Client endorsed Professional delivery.
5.0$3,915

Hourly Rate - AgentKong

“Respectful, knowledgeable, honest and smart. Good character and good work ethic combined for a great experience.”

5.0 review on 131 hours of AgentKong product work.

Client review screenshot: long-term frontend and full stack work: $16,399 across 1,754 hours. Client quote praises Shubham as a top developer and expert.
5.0$16,399

Frontend / Full Stack Developer for Long Term Work

“Wow. It has been an absolutely incredible experience working with Shubham. Beyond the fact that he is a top developer and true expert in his field, he is also a great collaborator.”

5.0 review after 1,754 hours of long-term full stack work.

Client review screenshot: Full Stack AI Developer long-term work: $8,144 across 679 hours. Client endorsed Reliable, Committed to Quality, Clear Communicator.
5.0$8,144

Full Stack AI Developer for Long Term Work

“Really enjoyed working with Shubham. He is creative, dependable, and easy to collaborate with. Work completed on time, communication was great, and quality stayed high.”

5.0 review on 679 hours of full stack AI development.

Client review screenshot: Hiding Elephant full stack development: $3,345 across 335 hours. Repeat client praised skills and personality on second project together.
5.0$3,345

Full Stack Development

“This was our second project working with Shubham, and just like the first, we had a fantastic experience throughout. Both skills and personality made delivery smooth.”

5.0 repeat-client review on Hiding Elephant full stack work.

Client review screenshot: Multi-Tenant Booking and Invoicing Platform built with Next.js and Supabase. $1,200 fixed price. Client praised scalable thinking beyond requirements.
5.0$1,200

AI Automation Developer - Multi-Tenant Booking & Invoicing Platform (Next.js/Supabase)

“Building a SaaS platform is challenging. Shubham consistently came up with smarter, more scalable solutions and was always thinking several steps ahead.”

5.0 review on a multi-tenant booking and invoicing SaaS build.

Client review screenshot: AI SaaS Platform for Real Estate project. $2,000 fixed price. Project ran Oct 2024 through Oct 2025.
4.0$2,000

AI SaaS Platform for Real Estate

4.0 review on a real estate underwriting SaaS platform.

Client review screenshot: Web Application Development project. $2,000 fixed price delivered Jul through Sep 2024.
5.0$2,000

Web Application Development

5.0 review on a full-stack image generation web application.

Read every review →
Live products

Named builds you can verify

Six production engagements with founders, countries, live URLs where public, and the stacks behind each delivery.

LogoArena

DanielItaly
logoarena.com

Full-stack logo contest and marketplace platform. Long-term partnership spanning frontend, backend, and ongoing feature delivery for a live Italian SaaS brand.

Next.jsFull Stack DevelopmentSaaSMarketplaceLong-term retainer

Hiding Elephant

AvielItaly
hidingelephant.com

AI logo generation SaaS for professional designers. Repeat engagement building the full product experience from generation flows to production deployment.

Next.jsAI Image GenerationSaaSFull Stack DevelopmentProduct design

UseCortana

Matei ParvuCanada
usecortana.ai

Multi-channel AI sales agent platform with voice, text, and agentic CRM. Fixed-price SaaS build plus ongoing hourly delivery for AgentKong product work.

VAPIVoice AIAI Agent DevelopmentNext.jsLiveKitAgentic CRM

MeisterFlow

Guliver KalambaSwitzerland
app.meisterflow.ch

Multi-tenant booking and invoicing platform for home services. Next.js and Supabase architecture with AI automation hooks, tenant isolation, and Stripe billing.

Next.jsSupabaseStripeMulti-tenant SaaSAI AutomationBooking systems

Real Estate Underwriting SaaS

Patrick AmpemUSA
Private beta

Domain-led vertical software for real estate underwriting workflows. Custom intake, document handling, and CRM-connected ops built around how underwriters actually work.

Workflow AutomationDocument ProcessingCRM IntegrationVertical SaaSNext.js

Image Generation SaaS

Pawel SazarykCanada
Client-owned product

Full-stack web application for AI image generation. Fixed-price delivery from scoped MVP through production-ready SaaS surfaces.

Next.jsAI Image GenerationSaaSWeb Application DevelopmentAPI Integration
View all projects and reviews →

Tech partner

Shubham leads delivery. The team fulfils for your clients.

See if we are a fit

Message me on WhatsApp with your vertical, client count, and the tech gap you need filled. If you have clients waiting on software you cannot ship, we should talk. Upwork history is there if you want background first.