// Customer & vendor portals
Customer and vendor portals connected to the systems you already run
Customers email to ask where their order is. Suppliers call to ask whether their paperwork went through. A portal stops those messages only when it shows the same order, invoice and document status your office sees, so our customer portal development starts with the database, ERP or CRM you already run. You talk directly to the U.S.-based engineers doing the work.
// Self-service
What customers and vendors should be able to do themselves
Good client portal development starts with the questions your team answers by phone and email every week. Contractors have needs of their own (see contractor portal development); for everything else, see all services.
Customers
Orders, reorders and status
Place or repeat an order, see where each one stands and check shipping without emailing a rep. Status comes from the system your office works in, so the portal and the phone give the same answer.
Customers
Invoices and statements
Open invoices, payment status and downloadable copies, limited to the accounts each person may see. Accounts payable stops asking your team to resend last month’s invoice.
Customers
Documents and requests
Contracts, spec sheets, certificates and manuals in one place, plus a request form that shows who has each request and what happens next.
Vendors & suppliers
Vendor onboarding
A vendor onboarding portal lets new suppliers enter their own details and upload a W-9 (the IRS taxpayer identification form), insurance certificates and licenses, instead of emailing attachments for someone to file.
Vendors & suppliers
Approvals and expiring documents
Uploads land in a review queue to approve, or reject with a reason the vendor can see. Expiry dates trigger reminders before a document lapses. See how automated expiration reminders work, or check your current list with the free document expiration tracker.
Vendors & suppliers
Purchase order and payment status
Suppliers see which POs are open, which invoices are approved and when payment is due, so accounts payable fields fewer “did you get my invoice?” calls.
// Integration
Integration is where portal projects succeed or fail
A B2B customer portal that keeps its own copy of your orders drifts away from the real ones, and then customers call to ask which status is right. To be trusted, it has to read from, and sometimes write to, the systems your team already works in.
We connect to your ERP or CRM through the REST APIs those products publish, or to SQL Server directly (more on API and database integration). Before building anything, we agree which system owns each piece of data, so the portal shows what the system of record says and every change goes back through one path. Questions we settle first:
- Which system owns each field, and which systems only read it
- How fresh the portal must be: a live lookup or a scheduled sync
- What the portal shows while the ERP or CRM is down for maintenance
- How portal logins map to your customer and vendor records
- Who gets alerted when a sync fails or doesn’t run
// Access & audit
Roles, security and audit trails for outside users
A portal opens your systems to people outside the company, so access rules are designed first, not added at the end. Broken access control is A01, the first entry, in the OWASP Top 10:2025 list of web application security risks.
Company accounts and roles
One customer company can have several users: a buyer who orders, an accounts payable clerk who sees invoices, an admin who adds colleagues. Each role sees only the screens it needs.
Least privilege, record by record
Access is denied unless it’s granted, and every request checks that the record belongs to the signed-in account. Changing an order number in the address bar should never open another customer’s order.
Audit trails
Who uploaded, approved, changed or downloaded what, and when. When a vendor disputes a rejection or a customer asks who placed an order, the answer is in the log.
Admin screens for your team
Staff screens to invite users, reset access, approve new vendors and switch off an account the day a contract ends, without asking a developer.
// Buy or build
Portal software or a custom portal build?
Sometimes the honest answer is to buy. If your customer records and support tickets already live in HubSpot or Salesforce, price their own portal options first (HubSpot calls its version a support portal). A no-code builder can also cover a simple client portal for sharing documents and requests.
A custom customer self-service portal earns its upkeep when one of these is true:
- Your process has steps a platform can’t model, such as approvals that depend on customer type, location or order value
- The data lives in an ERP or SQL Server database the platform can’t reach cleanly
- Your roles don’t fit: customers with many locations, suppliers with several contacts, staff who act on a customer’s behalf
- Per-user pricing climbs as you add every customer contact and supplier
There’s a middle path
Keep the platform for what it does well, and have us build the integration or the one workflow it can’t handle. Our guide covers what platforms do well, signs you’ve outgrown one, and a decision table.
Portal software vs a custom build →// Process
How a customer portal development project runs
Your first call is with an engineer, not a salesperson. From there, a portal project runs in four steps.
Step 1
Map users and the jobs they need done
We list each type of outside user (buyer, accounts payable, supplier contact) and what they call or email about today. That list sets the first release: the few screens that take the most calls off your team.
Step 2
Connect to your systems
We get access to the ERP, CRM or database, agree which system owns each field, and confirm how portal logins match your existing customer and vendor records, duplicates included.
Step 3
Build and test on staging
We’d build against a staging copy with a test account for each role, so your team can try the portal the way a customer or supplier would before anything goes live.
Step 4
Launch, host and maintain
We launch with your team and invite customers or vendors in groups, so early questions get fixed before everyone arrives. The same crew that builds the portal hosts and maintains it.
// Selected work
Selected work: software people outside the company use
Just A Menu is our own product, which we designed, built and still run for restaurants across the U.S. For Amusement Advantage, we’re modernizing an existing contractor portal page by page, with ongoing maintenance. And we host and maintain a national retail chain’s careers website.
Our own platform · Restaurants
A platform we designed, built and still run
Just A Menu keeps QR menus, TV menu boards, print, websites and an API in sync from one dashboard, plus the JAM Player hardware.
Modernization · Contractor portal
A contractor portal made mobile-friendly, page by page
We’re modernizing Amusement Advantage’s existing contractor portal for its network of 60,000+ contractors. Mobile-responsive pages now cover about 90% of the contractor workflow, with 20–30% fewer support requests for login, opportunity search and assignment status.
Hosting · Maintenance
A national careers website, hosted and maintained
We host and maintain the careers website for a national retail chain. The client is confidential, so we don’t name it.
// Credentials
The basics, before you ask.
Since 2018
Building and supporting software
Orlando, FL
100% U.S.-based team, clients nationwide
SAP Ariba
Registered supplier
NDAs welcome
Happy to sign before you share details
Top Web Design Companies
DesignRush
// FAQ
Customer and vendor portal development FAQ
Should we buy portal software or build a custom portal?
Buy when a platform covers your users, roles and data well. Build when your workflows or data don’t fit, or per-seat costs stop making sense. Our guide on portal software vs a custom build walks through the decision, and the build vs buy calculator compares the costs using your own quotes.
Can the portal connect to our ERP, CRM or SQL Server database?
Yes, through their APIs or, for SQL Server, the database directly. We decide which system owns each piece of data before building anything, so the portal and your office don’t show different answers.
What’s the difference between a vendor portal and a supplier portal?
In practice many companies use the terms interchangeably, and supplier portal development covers the same work. What matters is which jobs vendors need to do themselves: onboarding, documents, approvals, status or payments.
Will customers and suppliers be able to use it on their phones?
They should. Suppliers upload insurance certificates and customers check orders from wherever they are, so we design forms, tables and file uploads for small screens from the start. If your current portal is painful on a phone, see mobile-friendly retrofits.
Who hosts and maintains the portal?
The same crew that builds it hosts and maintains it, so changes and fixes come from people who know the code. See maintenance and support.
What drives the cost of a portal?
The number of user types and roles, the systems it connects to, document handling, phone use and ongoing upkeep. Your first call is with an engineer who can scope a sensible first release.
// Keep exploring
More on planning a customer or vendor portal
Free tool
Build vs buy calculator
Build vs buy software calculator: compare SaaS subscriptions with a custom build over 1 to 10 years using your own quotes, with break-even month and seats.
Use the free tool →Guide
Portal software vs custom
Should you buy customer portal software or build a custom portal? What platforms do well, signs you’ve outgrown them, the middle path and a decision table.
Read more →Service
API & database integration
Custom API integration services for the systems you already run: REST APIs, SQL Server databases and Tableau reporting, built by U.S.-based engineers.
Read more →// Bring us in
Tell us about the software your business runs on.
A new build, a system that’s hard to use, a stuck project or a prototype that needs to go live. An engineer, not a salesperson, will get back to you.
202-88-MAGIC · or email info@effortlesspresence.com