How much does customer portal development cost?

A portal MVP with Keycloak login and first self-service features runs €8,000–20,000. A complete customer portal with roles, company accounts, and a first ERP integration costs €20,000–60,000; a multi-tenant portal platform with multiple integrations, €60,000–150,000. All ranges are net of VAT and come from real projects. Which class your project falls into — and whether custom development pays off at all — is what we settle in an upfront discovery.

Build a custom customer portal or buy SaaS portal software — which is more economical?

It depends on the ERP depth you need. If standard support without deep integration is enough, buy SaaS like Zendesk and skip the development cost — we'll say so even when it costs us revenue. Custom development pays off when customers need to pull orders, invoices, and documents straight from your systems and SaaS costs would grow by a factor of 3–5 as you scale. Often a hybrid is the pragmatic path.

How long does customer portal development take until the first go-live?

A portal MVP with login and first self-service features goes live with us in 6–12 weeks. That lets you validate the business case against real user behavior before making the larger investment in a role model and ERP integration. Complete portals with integrations take correspondingly longer; we set the concrete timeline in the discovery that precedes every project.

How is the customer portal connected to our ERP or CRM system?

Through interfaces that pull orders, invoices, and master data from your ERP or CRM into the portal — via API, middleware, or synchronization, depending on the system. The portal can also sit as a modern layer in front of a legacy ERP: your customers work with a contemporary interface while the core system stays untouched. Which systems you run and how deep the integration needs to go is what we assess in the discovery.

Why Supabase and Keycloak instead of a US SaaS — and how do you ensure GDPR-compliant EU hosting?

Both are open source and run on EU infrastructure you control — with no license fees that scale with user counts and no data transfers to third countries. Keycloak handles SSO, roles, and company accounts; Supabase provides the database and tenant isolation via Row Level Security. The demand for European providers is measurable: according to Bitkom 2025, 82% of German companies want hyperscalers from Germany or Europe.

What's the difference between a customer portal, a web app, and a website?

A website informs and generates leads — no login. A web app maps processes, usually for your own employees. A customer portal is technically a web app, but the users are your external customers: they sign in and handle requests themselves that would otherwise go through email and phone. What matters is the use case, not the technology — and that's also what drives the ROI logic.

What ongoing costs arise after launching a customer portal?

The open-source stack's infrastructure costs €20–50 per month, or €150–400 for high availability. Add 2–5 hours of operations per month at approx. €125/h for monitoring, updates, and Supabase/Keycloak maintenance. Over three years, the stack's TCO comes to €40,000–80,000 — disclosed in full on our blog. Ongoing development via retainer costs €4,000–12,000 per month, as a predictable alternative to your own senior hire.

Customer portal development: self-service that takes the load off your support team and becomes a sales channel

A self-service contact costs about $1.84; an agent-handled contact costs $13.50 — and for B2B companies that offer self-service, that channel is now their highest-revenue sales channel. We build customer portals on Next.js, Supabase, and Keycloak: EU-hosted, connected to your ERP or CRM via SSO and APIs, and live as an MVP within a few weeks. Before we build anything, we give you an honest assessment of whether custom development pays off for you — or whether a SaaS solution is all you need.

We're a senior-first team based in Berlin, and we treat a customer portal not as an IT project but as a business case: ticket deflection on the cost side, self-service as a revenue channel on the sales side. The stack — Next.js, Supabase, Keycloak — is open source and EU-hosted, with no license fees that scale with your user count. And our price ranges are published right on this page, not hidden behind a contact form.

A custom portal isn't always the right answer. If standard support without deep ERP integration is enough, Zendesk or another SaaS solution is the more economical choice — and we'll tell you that in the first call, even if it costs us the deal. That's why every project starts with a make-or-buy check, and why you'll find the decision table right here on this page.

Terms you should know

Definition

Customer portal: A secure self-service area for your existing customers: login, documents, orders, invoices, tickets — connected to your ERP and CRM so customers can handle requests themselves that today require email and phone calls. It's not a marketing website and not an internal web app: the users are your customers, not your employees.

Definition

Ticket deflection: The share of inquiries the portal resolves instead of your support team — the central ROI lever of every portal project. Well-executed self-service achieves a 25–45% reduction in tickets, at a contact cost of about $1.84 for self-service versus $13.50 per agent-handled contact. Run those numbers against your own ticket volume and you have your business case.

Definition

SSO (single sign-on): One login for the portal and every connected system — in our stack via Keycloak, open source and self-hosted in the EU. SSO is the prerequisite for B2B reality: company accounts with multiple users, roles, and approval levels. Tenant isolation at the database layer is handled by Supabase Row Level Security.

The business case is well documented: according to the 2025 support cost benchmarks from LiveChatAI, a self-service contact costs about $1.84 versus $13.50 for an agent-handled contact — and well-executed self-service achieves a 25–45% reduction in tickets. And self-service has long been about more than cutting costs: among B2B companies with e-commerce and self-service offerings, that channel is the strongest sales channel at 34% of revenue according to McKinsey's B2B Pulse 2024, and 39% of buyers spend more than $500,000 per order via self-service. Two more numbers shape our decisions: according to Bitkom 2025, 82% of German companies want hyperscalers from Germany or Europe, and 37% would use a purely German cloud service even with drawbacks — which is why we host in the EU. And according to Gartner (March 2026), 67% of B2B buyers prefer a buying process without sales contact — which is why pricing, comparisons, and FAQs are published openly on this page.

Security & compliance

Your customers trust you with sensitive data. We take that responsibility seriously.

Whether it's your data protection officer, your IT security team or a major customer's procurement: when security questions come up, you have solid answers. We build in data protection and security from day one and follow the principles of the Twelve-Factor App. That makes approvals and audits easier and gives you the technical foundation to meet requirements under GDPR, ISO 27001 or HIPAA.

Frameworks whose technical requirements we implement in our projects

GDPR
ISO 27001
HIPAA
NIS2

Discuss your requirements in an intro call

Make or buy: purchase SaaS, build custom — or go hybrid?

Not every company should have a customer portal built. This table is the same decision framework we use in the first call — including the column that earns us no revenue.

Criterion	SaaS portal software (Zendesk & co.)	Custom customer portal (Next.js + Supabase + Keycloak)	Hybrid (SaaS support + custom portal)
Time to live	Days to a few weeks — configuration instead of development	MVP in 6–12 weeks, full portal correspondingly longer	SaaS immediately, portal features added step by step
Cost in year one and at scale	Low entry price, then growth via seats and storage — often by a factor of 3–5 as you scale	MVP €8,000–20,000, with ERP integration €20,000–60,000; after that, near-constant infrastructure costs with no license scaling	SaaS licenses plus the portal investment; the license share stays small as core features move into the portal
Depth of ERP/CRM integration	Standard connectors; quickly hit their limits with custom logic and legacy systems	As deep as you need — orders, invoices, and master data straight from your systems	Support processes in SaaS, ERP depth in the custom portal
Branding and UX	Template with logo and color customization	Fully your brand, your processes, your user journeys	Inconsistent — two systems, two interfaces
Data sovereignty and EU hosting	Depends on the vendor, often US cloud	Open source, EU-hosted, full data sovereignty	Split — part of your customer data sits with the SaaS vendor
Ongoing effort	Low — the vendor handles updates and operations	Operations, monitoring, and updates required — available from us as a managed operations package	Both, at reduced scale
When is this the right choice?	When standard support without ERP depth is enough — then buy SaaS and skip the development cost	When self-service needs to run on your ERP data and the portal becomes part of your value creation	When tickets are well served in SaaS, but orders, documents, and invoices belong in the portal

Time to live

SaaS portal software (Zendesk & co.): Days to a few weeks — configuration instead of development
Custom customer portal (Next.js + Supabase + Keycloak): MVP in 6–12 weeks, full portal correspondingly longer
Hybrid (SaaS support + custom portal): SaaS immediately, portal features added step by step

Cost in year one and at scale

SaaS portal software (Zendesk & co.): Low entry price, then growth via seats and storage — often by a factor of 3–5 as you scale
Custom customer portal (Next.js + Supabase + Keycloak): MVP €8,000–20,000, with ERP integration €20,000–60,000; after that, near-constant infrastructure costs with no license scaling
Hybrid (SaaS support + custom portal): SaaS licenses plus the portal investment; the license share stays small as core features move into the portal

Depth of ERP/CRM integration

SaaS portal software (Zendesk & co.): Standard connectors; quickly hit their limits with custom logic and legacy systems
Custom customer portal (Next.js + Supabase + Keycloak): As deep as you need — orders, invoices, and master data straight from your systems
Hybrid (SaaS support + custom portal): Support processes in SaaS, ERP depth in the custom portal

Branding and UX

SaaS portal software (Zendesk & co.): Template with logo and color customization
Custom customer portal (Next.js + Supabase + Keycloak): Fully your brand, your processes, your user journeys
Hybrid (SaaS support + custom portal): Inconsistent — two systems, two interfaces

Data sovereignty and EU hosting

SaaS portal software (Zendesk & co.): Depends on the vendor, often US cloud
Custom customer portal (Next.js + Supabase + Keycloak): Open source, EU-hosted, full data sovereignty
Hybrid (SaaS support + custom portal): Split — part of your customer data sits with the SaaS vendor

Ongoing effort

SaaS portal software (Zendesk & co.): Low — the vendor handles updates and operations
Custom customer portal (Next.js + Supabase + Keycloak): Operations, monitoring, and updates required — available from us as a managed operations package
Hybrid (SaaS support + custom portal): Both, at reduced scale

When is this the right choice?

SaaS portal software (Zendesk & co.): When standard support without ERP depth is enough — then buy SaaS and skip the development cost
Custom customer portal (Next.js + Supabase + Keycloak): When self-service needs to run on your ERP data and the portal becomes part of your value creation
Hybrid (SaaS support + custom portal): When tickets are well served in SaaS, but orders, documents, and invoices belong in the portal

Technically, a customer portal is a subclass of a web app — the fork in the road is the use case. If the users are your own employees and the goal is internal processes or replacing spreadsheets, you're looking for our web app services. If there's no login at the center but lead generation instead, you need a B2B website, not a portal. And if the portal is meant to sit as a modern layer in front of a legacy ERP, our guide Next.js as an integration layer for legacy systems shows how that path works without touching the core system.

What you can buy from us

Three clearly scoped entry points — from a validating MVP to a multi-tenant platform with managed operations.

Portal MVP

Live within a few weeks: you test against real user behavior whether the big investment pays off.

Discovery with a make-or-buy check
You know up front whether building or buying fits better.
Keycloak login with a basic role model
First self-service feature
Customers look up things like order status or documents themselves.
EU hosting from day one

Customer portal with ERP/CRM integration

The complete portal, connected to your existing systems.

Company accounts with multiple users
With roles and approval levels for each user.
Tenant isolation in the database
Via Supabase Row Level Security: each customer sees only their own data.
ERP and CRM integrations
Orders, invoices and master data from your systems.
SSO for adjacent systems too

Portal platform and operations

One portal for multiple brands, countries or tenants, run without hiring your own senior engineer.

Multi-tenancy
Portal in front of the legacy ERP
Strangler pattern: your ERP keeps running and can be replaced step by step.
Operations and monitoring
Your portal runs on EU infrastructure and is monitored.
Predictable ongoing development
On a fixed monthly retainer.

Packages and pricing

We publish price ranges before you have to ask. Not because every project costs the same, but because you can't make a make-or-buy decision without numbers — and because we'd rather be ruled out before the first call than after it.

Package	Scope	Price range
Portal MVP (login + 1–2 self-service features)	Keycloak login, first self-service feature, basic roles, EU hosting, 6–12 weeks	€8,000–20,000
Customer portal with roles/permissions and first ERP integration	Company accounts, role and approval model, RLS tenant isolation, ERP/CRM interface, SSO	€20,000–60,000
Portal platform (multiple tenants/brands, multiple integrations)	Multi-tenancy, multiple systems connected, legacy integration layer, rollout across multiple countries	€60,000–150,000
Operations and hosting (EU)	Hetzner/EU hosting, monitoring, updates, Supabase/Keycloak operations	Infrastructure €20–50/month (high availability €150–400) plus 2–5 hours of operations/month at approx. €125/h; 3-year TCO of the stack: €40,000–80,000
Ongoing development via retainer	Continuous build-out, quarterly prioritization, alternative to a senior hire (€145,000–200,000 in year one)	€4,000–12,000/month

Portal MVP (login + 1–2 self-service features)

Scope: Keycloak login, first self-service feature, basic roles, EU hosting, 6–12 weeks
Price range: €8,000–20,000

Customer portal with roles/permissions and first ERP integration

Scope: Company accounts, role and approval model, RLS tenant isolation, ERP/CRM interface, SSO
Price range: €20,000–60,000

Portal platform (multiple tenants/brands, multiple integrations)

Scope: Multi-tenancy, multiple systems connected, legacy integration layer, rollout across multiple countries
Price range: €60,000–150,000

Operations and hosting (EU)

Scope: Hetzner/EU hosting, monitoring, updates, Supabase/Keycloak operations
Price range: Infrastructure €20–50/month (high availability €150–400) plus 2–5 hours of operations/month at approx. €125/h; 3-year TCO of the stack: €40,000–80,000

Ongoing development via retainer

Scope: Continuous build-out, quarterly prioritization, alternative to a senior hire (€145,000–200,000 in year one)
Price range: €4,000–12,000/month

As of July 2026

All prices net of VAT. These ranges come from real projects — whether your project falls into the MVP or the platform class, and whether you should build custom at all, is what we settle in a discovery with a make-or-buy check.

Who works on your project

Our senior team in Berlin, from the first draft to production. You talk directly to the people who write your code.

Meet the team

FAQ

Answers for the buying committee — including the uncomfortable ones.

: A portal MVP with Keycloak login and first self-service features runs €8,000–20,000. A complete customer portal with roles, company accounts, and a first ERP integration costs €20,000–60,000; a multi-tenant portal platform with multiple integrations, €60,000–150,000. All ranges are net of VAT and come from real projects. Which class your project falls into — and whether custom development pays off at all — is what we settle in an upfront discovery.
: It depends on the ERP depth you need. If standard support without deep integration is enough, buy SaaS like Zendesk and skip the development cost — we'll say so even when it costs us revenue. Custom development pays off when customers need to pull orders, invoices, and documents straight from your systems and SaaS costs would grow by a factor of 3–5 as you scale. Often a hybrid is the pragmatic path.
: A portal MVP with login and first self-service features goes live with us in 6–12 weeks. That lets you validate the business case against real user behavior before making the larger investment in a role model and ERP integration. Complete portals with integrations take correspondingly longer; we set the concrete timeline in the discovery that precedes every project.
: Through interfaces that pull orders, invoices, and master data from your ERP or CRM into the portal — via API, middleware, or synchronization, depending on the system. The portal can also sit as a modern layer in front of a legacy ERP: your customers work with a contemporary interface while the core system stays untouched. Which systems you run and how deep the integration needs to go is what we assess in the discovery.
: Both are open source and run on EU infrastructure you control — with no license fees that scale with user counts and no data transfers to third countries. Keycloak handles SSO, roles, and company accounts; Supabase provides the database and tenant isolation via Row Level Security. The demand for European providers is measurable: according to Bitkom 2025, 82% of German companies want hyperscalers from Germany or Europe.
: A website informs and generates leads — no login. A web app maps processes, usually for your own employees. A customer portal is technically a web app, but the users are your external customers: they sign in and handle requests themselves that would otherwise go through email and phone. What matters is the use case, not the technology — and that's also what drives the ROI logic.
: The open-source stack's infrastructure costs €20–50 per month, or €150–400 for high availability. Add 2–5 hours of operations per month at approx. €125/h for monitoring, updates, and Supabase/Keycloak maintenance. Over three years, the stack's TCO comes to €40,000–80,000 — disclosed in full on our blog. Ongoing development via retainer costs €4,000–12,000 per month, as a predictable alternative to your own senior hire.

Customer portal development: self-service that takes the load off your support team and becomes a sales channel

Terms you should know

Your customers trust you with sensitive data. We take that responsibility seriously.

Make or buy: purchase SaaS, build custom — or go hybrid?

What you can buy from us

Portal MVP

Customer portal with ERP/CRM integration

Portal platform and operations

Packages and pricing

Who works on your project

FAQ

Let's talk about your project

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Customer portal development: self-service that takes the load off your support team and becomes a sales channel

Terms you should know

Your customers trust you with sensitive data. We take that responsibility seriously.Your customers trust you with sensitive data. We take that responsibility seriously.

Make or buy: purchase SaaS, build custom — or go hybrid?

What you can buy from us

Portal MVP

Customer portal with ERP/CRM integration

Portal platform and operations

Packages and pricing

Who works on your project

FAQ

Let's talk about your project

Your customers trust you with sensitive data. We take that responsibility seriously.