Yes. HubSpot’s CMS, custom objects, serverless functions, and membership features provide the infrastructure needed for custom web applications. We’ve built client portals, partner dashboards, and internal tools on HubSpot that serve hundreds of concurrent users. For most B2B use cases, HubSpot provides everything you need — hosting, authentication, data storage, and API infrastructure — without managing separate servers or databases.
Portals & Apps
Extend HubSpot beyond the CRM. Custom client portals, partner dashboards, and web applications built on HubSpot’s infrastructure.
Does your business need a customer-facing application connected to your CRM?
HubSpot is more than a CRM — it’s an application platform. We build custom portals, dashboards, and web applications on HubSpot’s CMS and API infrastructure — giving your customers, partners, and internal teams self-service experiences that are connected to your revenue data.
Custom applications built on infrastructure you already own
Building custom portals on HubSpot means your customer-facing applications are connected to your CRM, marketing, and service data natively. No third-party middleware. No data sync headaches. One platform.
CRM-native applications
Every portal and app we build reads from and writes to your HubSpot CRM. Customer data, deal history, ticket status, and account information are available without integration layers.
Membership and access control
HubSpot’s membership functionality provides secure, authenticated access for customers, partners, or internal teams. Permission levels, content gating, and role-based views are built in.
Serverless architecture
HubSpot’s serverless functions handle custom business logic, API connections, and dynamic data processing — without managing servers, infrastructure, or hosting.
Custom object integration
HubSpot custom objects let us model any data type — projects, subscriptions, assets, properties — and surface them in portal interfaces with full CRM association.
Scalable and secure
HubSpot’s enterprise infrastructure handles hosting, SSL, CDN delivery, and security patching. Your portal scales with demand without infrastructure management.
Reduced total cost of ownership
Building on HubSpot eliminates the cost of separate hosting, database management, and integration maintenance. One platform means lower ongoing costs and faster iteration.
Your customers expect self-service. Your CRM should power it.
Modern B2B customers expect to access their account information, track project status, download documents, and submit requests without picking up the phone. We build customer-facing portals on HubSpot that deliver these experiences — connected directly to your CRM data. When a customer logs into their portal, they see their real-time deal status, open tickets, shared documents, and account history — pulled live from HubSpot, not a separate database that drifts out of sync.
Custom applications without custom infrastructure
Traditionally, building a customer portal or web application meant managing servers, databases, authentication, and hosting — on top of integrating it all with your CRM. HubSpot changes that equation. We build applications using HubSpot’s CMS, serverless functions, custom objects, and API infrastructure — delivering enterprise-grade functionality on a platform you already manage. The result is faster development, lower maintenance costs, and applications that are CRM-connected from the first line of code.
How we build portals and applications on HubSpot
A structured development methodology that balances speed with architectural rigour.
Requirements & Scoping
We define the application’s purpose, user roles, data requirements, and integration points. User stories, wireframes, and a technical architecture document are produced before development begins.
Data Model & Architecture
Custom objects, properties, and associations are designed in HubSpot to support the application’s data requirements. API architecture, serverless function design, and authentication flows are planned.
UI/UX Design
Portal interfaces are designed with user experience as the priority — responsive layouts, intuitive navigation, and clear information hierarchy. Every screen is prototyped and approved before build.
Development & Integration
Front-end templates, serverless functions, API connections, and CRM integrations are built on HubSpot’s infrastructure. Iterative development with regular demos and stakeholder feedback.
Testing & QA
Functional testing, security review, performance testing, and user acceptance testing across devices and scenarios. Edge cases are identified and resolved before launch.
Launch & Iteration
Controlled launch with monitoring, error tracking, and usage analytics. Post-launch iterations based on real user behaviour and feedback.
Enterprise application development on HubSpot
From simple client portals to complex multi-role applications — we build with the full breadth of HubSpot’s development platform.
Client Portals
Secure, authenticated portals where customers view account data, track projects, access documents, and submit requests — all powered by HubSpot CRM data.
Partner & Dealer Dashboards
Multi-role dashboards for channel partners, resellers, or franchise networks. Deal registration, lead distribution, co-marketing, and performance reporting.
Internal Tools & Apps
Custom internal applications for operations teams — resource allocation, project tracking, approval workflows, and data management tools connected to HubSpot.
Custom Integrations & APIs
Serverless functions, webhook handlers, and custom API endpoints that connect HubSpot to external systems and enable dynamic application functionality.
Applications built for your specific business model
Every portal and app we build serves a defined business purpose — from customer self-service to partner management.
Customer Self-Service
Account dashboards, ticket submission, document libraries, and project tracking. Give customers 24/7 access to the information they need without calling your team.
Partner Management
Deal registration, lead distribution, co-marketing resource centres, and performance dashboards. Manage your channel ecosystem from one platform.
Knowledge & Resource Portals
Gated content libraries, training platforms, and documentation centres with membership access, search, and categorisation. Monetise content or enable adoption.
Operations Applications
Internal tools for field teams, operations managers, and project coordinators. Custom workflows and data interfaces connected to your CRM and business systems.
Trusted by leading brands
B2B SaaS Client
Built a customer portal on HubSpot giving 500+ clients self-service access to account data, project status, and support tickets — reducing inbound support calls by 35%.
Read case studyChannel Partner Network
Developed a partner deal registration portal with automated lead distribution, co-marketing resource library, and performance dashboards across 150 channel partners.
Read case studyProperty Management Firm
Custom internal operations application on HubSpot — connecting field teams to CRM data with real-time project tracking and automated reporting.
Read case studyClient Testimonials
We embarked on a massive initiative to rebrand and unify our worldwide web presence. MO Agency supported every pivot and provided crucial technical advice during regional go-live days.
Twigge A.
Head of Digital
I am incredibly impressed with MO Agency’s work on our websites. The final sites are not only visually stunning but also user-friendly and strategically designed.
Lebona O.
Marketing Manager | Technology
MO Agency has been instrumental in helping us implement HubSpot with custom API integrations, providing exceptional service throughout the process.
Potgieter J.
Head of Sales | Finance & Insurance
We’ve been lucky to work with MO Agency on extensive HubSpot website work. Their team has been professional, responsive, and proactive throughout our collaboration.
Frank A.
Marketing Director
Reviews from the HubSpot Partner Directory. View them all.
Frequently Asked Questions
Can HubSpot really be used as an application platform?
What types of portals can you build?
We build customer self-service portals, partner and dealer dashboards, knowledge and resource centres, internal operations tools, and membership-gated content platforms. Any application that benefits from being connected to CRM data — account information, deal status, ticket history, custom objects — is a strong candidate for HubSpot development.
How does authentication work?
HubSpot’s membership feature provides secure, SSO-compatible authentication. Users register or are provisioned through the CRM, receive login credentials, and access portal content based on their list membership or lifecycle stage. Role-based access control allows different user types to see different content and data. For enterprise requirements, we can implement custom authentication flows.
How long does a portal or app project take?
A focused client portal with standard features (account dashboard, ticket submission, document library) typically takes 10–14 weeks. Complex applications with custom objects, multi-role interfaces, serverless functions, and third-party integrations run 14–24 weeks. We provide a detailed timeline during the scoping phase.
How much does a custom portal cost?
Portal projects typically range from R200,000–R600,000 / £10,000–£30,000 depending on complexity, number of user roles, custom object requirements, and integration scope. Simple self-service portals sit at the lower end. Complex multi-role applications with serverless functions and external integrations are scoped individually. We provide a detailed proposal after requirements gathering.
Do we need HubSpot Enterprise for this?
Most portal and application features require HubSpot CMS Hub Professional or Enterprise. Custom objects, membership features, and serverless functions are available at these tiers. We assess your current HubSpot subscription during scoping and advise on any upgrades needed. In many cases, the cost of a HubSpot tier upgrade is significantly less than building equivalent functionality on separate infrastructure.
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