B2B Portal: Your professional clients order themselves — great
Catalog with client-specific pricing, orders, documents, and shipping status without overloading the sales team with repetitive calls.
The Problem
If you sell to professionals, you know the pattern: the client calls to check stock, requests the same item as last month with a different delivery address, and asks for a copy of the invoice via email. Your sales team ends up acting as a call center instead of selling.
A B2C ecommerce solution won't work: client-specific pricing, minimum order quantities, internal references, payment terms, and partial catalogs break standard templates.
A custom B2B portal puts the client in control with your rules: they see their pricing, repeat orders, check balances, and download delivery notes — all synchronized with your ERP or warehouse.
If this sounds familiar, you're not alone: most SMEs reach this point before considering building. The question isn't 'Can we afford custom software?' but 'How much does it cost to continue as we are for another year?'. That cost — hours, errors, lost opportunities — is often greater than that of a well-defined initial milestone.
Every call asking 'Do you have stock of item X?' signals that the client wants self-service but doesn't have it. A well-designed B2B portal reduces friction without eliminating the commercial relationship in key accounts.
In practice, ROI is measured in weeks: hours saved from copying data, errors that no longer occur, and decisions made with same-day information. If you can't estimate that saving, it's worth doing before requesting a quote — we can help with diagnostics to provide conservative numbers.
If you've made it this far, you've probably already discussed internally that 'we need a system'. The next step isn't to request three generic quotes: it's to write a paragraph detailing what the system should do on the Monday it goes live and who will validate it. This defines the MVP better than any list of features copied from a competitor.
What is a B2B Portal
It's a private web area where each professional client accesses with their credentials, views a filtered catalog, checks agreed prices, places orders, and accesses commercial documentation.
It includes B2B rules: minimums, free shipping thresholds, multiple delivery addresses, client references, recurring orders, and, if applicable, integration with their ERP via EDI or API.
It does not replace the commercial relationship: it strengthens it by freeing up time and reducing friction in transactions.
At RUMAZA, we approach it with verifiable deliverables: something in production that the team uses, adoption metrics, and a roadmap for subsequent phases only if the previous phase delivers measurable value. No infinite roadmaps or paying for fluff.
You can combine a web portal for most clients and an API for larger clients integrating with their ERP. Same business logic, different entry channels.
Sales recover hours when routine orders come in automatically and calls are reserved for negotiation and key accounts.
The B2B catalog is not just a copy of the B2C version with a login: hiding references, showing only what that client can purchase, and respecting framework contracts is business logic, not design.
When It Makes Sense
- More than 30% of orders are repetitive or of low added value
- You have different pricing for each client or group
- The sales team spends hours on operational inquiries
- You want large clients to integrate orders via web or API
- You need to reduce transcription errors to the warehouse
- The catalog is extensive and clients search by their own references
- Management requests visibility and data takes days to be ready
- An error in the current process directly impacts the client or margin
- You've tried patches (macros, Zapier, templates) and they no longer handle volume
- You want to document the decision criteria before investing — this B2B portal guide helps you compare options
- You seek a partner that speaks in deliverables, not in indefinite hours of 'analysis'
- You want to compare build vs buy with numbers before signing
What Can Be Built
Custom B2B Catalog
References, prices, visible stock, and advanced search. Designed for real adoption: simple screens, validated data, and fewer fields than a generic SaaS.
Cart and Orders
Minimums, credit validation, and email confirmation. Designed for real adoption: simple screens, validated data, and fewer fields than a generic SaaS.
History and Reordering
Reorder previous orders in two clicks. Designed for real adoption: simple screens, validated data, and fewer fields than a generic SaaS.
Documentation
Invoices, delivery notes, and downloadable commercial terms. Designed for real adoption: simple screens, validated data, and fewer fields than a generic SaaS.
API for Large Clients
Automatic integration of orders from their system. Designed for real adoption: simple screens, validated data, and fewer fields than a generic SaaS.
Subsequent Evolution Phase
Expansion of the initial module with new integrations, roles, or reporting — only after validating adoption and ROI from the previous phase. Avoid building features that no one requested in the urgency of day one.
How RUMAZA Would Build It
Possible Technologies
- Next.js
- Django / FastAPI
- PostgreSQL
- ERP APIs
- Redis
- Transactional email
- Optional SSO
Hypothetical Application Scenarios
B2B Clients Place Orders via Email or Phone
Sales transcribes to the ERP and manually confirms pricing. Portal with catalog, client-specific pricing, and reordering of regular orders.
Scattered Commercial Documentation
Delivery notes, invoices, and account statements via email. Portal where the client checks history and downloads what they need.
Stock Visible Only to Internal Sales
Clients call to check availability. Portal connected to the warehouse reduces calls and promise errors.
Common Mistakes
- Displaying unreliable stock and losing trust
- Launching without a pilot group of real clients
- Not synchronizing prices and having commercial disputes
- UX designed for B2C with inadequate B2B checkout
- Ignoring that some clients will continue to call
- Postponing the decision another year 'until we grow a bit more' — chaos also scales
- Not measuring before/after: without a baseline, you don't know if the project worked
- Requesting a quote without defining MVP or a person to validate deliverables on behalf of the business
Frequently asked questions
B2B Portal or Shopify Plus?
Shopify can work for simple cases. Custom portal when commercial rules, integrations, and client-specific catalogs exceed what is reasonable in a template.
Do clients need training?
Little if the UX is clear. A two-page PDF and support for the first orders usually suffice.
Does it integrate with our ERP?
Yes. Incoming orders, stock updates, and outgoing documents via API or synchronization.
How long does it take?
MVP with catalog and orders: 8–12 weeks depending on integrations.
Can multiple users from a company place orders?
Yes, with roles: buyer, approver, view invoices only, etc.
How do I know if we're ready to take the step?
If you can name a specific process that hurts every week, there's an internal owner willing to validate, and the cost of the status quo is greater than €5,000–10,000 annually in time or errors, it deserves a diagnostic conversation. If not, sometimes it's enough to organize data and use what you already have better.
How do I encourage clients to use the portal?
Reliable stock, easy reordering, and faster response times than by phone. Some clients migrate on their own when they see it's faster.
What specific deliverables do I receive at each phase?
At each milestone: code in your repository, staging environment for testing, deployment and usage documentation, and acceptance criteria signed before going live. We don't just deliver a ZIP or an 80-page PDF that no one reads. The deliverable must be usable by someone other than the developer.
Do you work with internal teams or only externally?
Both. If you have a technical person, we integrate into your workflow (Git, tickets, reviews). If not, we take on the complete operation but provide documentation so you're not held hostage. We recommend at least one business representative to validate each sprint.
What happens if our process changes in six months?
A custom system should evolve with you. That's why we avoid shortcuts that prevent changing rules: readable code, documentation, and improvement phases. Small changes go to maintenance; model changes are budgeted as a new phase with clear impact.
How are permissions and security managed?
Defined roles from the MVP: who sees, who edits, who approves. Authentication with email/password or SSO if you already use it. Sensitive data encrypted in transit, automatic backups, and logs of critical actions. It's not paranoia: it's to prevent an intern from exporting the entire client database unintentionally.
Do you offer training for the team?
Yes, a practical session of 1–2 hours on the delivered workflow, plus brief documentation with screenshots. We prefer training on the real MVP, not on 50 features that will arrive in phase 2. If support is needed in the first weeks, it can be arranged as post-launch support.
What is the first concrete step if I want to move forward?
A message detailing the process that hurts the most, who suffers from it, and what tools you use today (even if it's Excel). Within 48–72 hours, we will respond with a recommendation for the first milestone, phase order, and indicative estimate — without commitment to a closed project if it doesn't fit.
Related guides
Do you have this problem in your company?
Tell me and I'll tell you what system I would build.