1
Agency-first tenancy
Agencies sign up once, white-label the platform, and spin up unlimited client businesses under one dashboard. Unified ad tracking, a cross-business inbox, and per-client isolation without rebuilding the stack each time.
Built for agencies · Production software
White-label AI sales infrastructure your agency can resell.
UseCortana gives agencies one subscription, unlimited client businesses, and a unified inbox for text and voice agents across SMS, WhatsApp, Instagram, email, and phone.
Multi-tenant AI sales platform with agency dashboards, per-business KPIs, a visual agent builder, GoHighLevel two-way sync, Vapi voice via LiveKit, and Stripe Connect white-label billing.
- Agency + unlimited businesses
- Inbound and outbound agents
- GoHighLevel native sync
- Voice via Vapi + LiveKit
Platform shape
Four layers agencies actually need
2
Text and voice on every channel
Connect SMS, phone, WhatsApp, Instagram, Messenger, web chat, and email to the same agent logic. Purchase numbers inside the product, provision SIP trunking automatically, and run outbound plus inbound from one builder.
3
GoHighLevel as the CRM spine
Two-way sync with GoHighLevel: contacts, custom fields, tags, and calendar bookings flow both directions. Use GHL messaging surfaces inside agents while conversations stay visible in the unified inbox.
4
Visual agent builder plus orchestration
React Flow powers the builder UI. Milestones, send-message nodes, control logic, AI tools, and calendar booking connect to Restack for durable agent orchestration across long-running sales workflows.
Architecture walkthrough
Inside a production AI sales platform for agencies
Shubham Kashyap walks through agency tenancy, unified inbox, multi-channel agents, GoHighLevel sync, the visual builder, and the Restack orchestration layer behind UseCortana.
Inside the product
What ships in production
Agency dashboard
One login. Every client business.
The agency view shows connected Meta ad accounts, every business under the agency, and a unified conversation inbox across all of them. Switch into any business dashboard without leaving the platform.
- Unified ad tracking connected to Meta
- Unlimited businesses per agency account
- Cross-business inbox for operators
- White-label branding per agency
Business dashboard
Pipeline metrics on one wall
Each business sees leads contacted, leads replied, appointments booked, and conversion rate in a single view. Built for operators who need to prove outbound and inbound performance to clients.
- Inbound and outbound metrics side by side
- Appointment and reply tracking
- Conversion rate at a glance
- Per-business user access controls
Agent builder
Multi-step flows with booking built in
Build agents in a visual canvas: conversation milestones, outbound messages, branching logic, AI tool calls, and a booking node wired to GoHighLevel calendars. The same builder powers Instagram, SMS, voice, and email surfaces.
- React Flow canvas for non-developer operators
- Booking node syncs to GoHighLevel calendars
- Reusable milestones and control logic
- Restack orchestration for long-running agents
Providers and compliance
Vapi voice, A2P, and the integrations stack
Connect GoHighLevel, Shopify, Stripe, Google, and telephony providers from settings. Purchase phone numbers in-product, auto-provision SIP trunking through LiveKit, and run a full A2P 10DLC flow with brand and campaign registration.
- Vapi for voice agents with in-app number purchase
- A2P 10DLC ISV and secondary customer profiles
- iMessage via LinQ or Sendinblue behind the scenes
- Provider hub for GHL, Stripe, Shopify, and more
Production stack
How the platform is engineered
Next.js on Vercel powers the app and white-label domains. PlanetScale MySQL holds tenant data. Stripe Connect handles agency billing. Restack runs agent orchestration. The architecture walkthrough below is the canonical deep dive Shubham recorded after shipping the platform for a paying agency client.
- Frontend
- Next.js, React Flow agent builder, Vercel hosting
- Database
- PlanetScale MySQL with multi-tenant isolation
- Voice
- Vapi agents, LiveKit SIP trunking, in-app number purchase
- Orchestration
- Restack for durable multi-step AI agent workflows
- CRM
- GoHighLevel two-way sync, tags, custom fields, calendars
- Billing
- Stripe Connect for agency white-label subscriptions
Who it is for
Built for agencies selling AI to local businesses
UseCortana mirrors the GoHighLevel agency model: one operator account, many client sub-accounts, white-label domains, and billing under your brand. If you run Meta ads and need agents to engage, qualify, and book leads from those funnels, this is the product layer.
| Capability | UseCortana | Typical point tool |
|---|---|---|
| Commercial model | Agency subscription with unlimited client businesses | Single-tenant bots or per-client custom builds |
| Channels | SMS, voice, WhatsApp, Instagram, Messenger, web chat, email | Usually one channel per tool |
| CRM | Native GoHighLevel two-way sync and calendar booking | Zapier glue or manual export |
| Voice compliance | A2P 10DLC, ISV profiles, in-app number provisioning | Agency figures out telco separately |
| White label | Custom domain, branding, Stripe Connect client billing | Vendor logo on every login |
| Builder | Visual agent canvas with booking and AI tool nodes | Prompt-only or rigid flow templates |
Related products
More FusionSync-built software
UseCortana handles agency-grade sales agents. IGThreadly covers Instagram comment-to-DM. MeisterFlow covers multi-tenant booking and invoicing for home services.
UseCortana
Multi-tenant AI sales platform
Agencies reselling voice and text agents to local business clients
IGThreadly
Instagram comment-to-DM automation
Creators and lean teams qualifying social inbound
Client projects and reviews
Named builds FusionSync shipped
Agency owners evaluating delivery proof before partnering
Client review
What the client said after we shipped
5.0
“Respectful, knowledgeable, honest and smart. Good character and good work ethic combined for a great experience.”
Committed to QualitySolution Oriented
Matei Parvu · Canada
AI Sales Bot / Chat Bot | SaaS Web App
$24,500 projectFixed price
Want this under your agency brand?
FusionSync builds and rolls out platforms like UseCortana for agency partners
UseCortana is one shipped example. FusionSync partners with agency owners to deliver white-label AI, CRM integrations, and per-client rollout when your clients pay. Same engineering pattern, your vertical, your client relationships.
Questions
UseCortana and delivery
UseCortana is a multi-tenant AI sales platform for agencies. Agencies subscribe once, create unlimited client businesses, and deploy text and voice agents across SMS, WhatsApp, Instagram, phone, web chat, and email with GoHighLevel sync and a visual agent builder.
See the live platform
UseCortana runs in production for agency clients today. Watch the architecture walkthrough above, then visit the product when you are ready to evaluate fit.