Client portal software: what to buy, what to build, and how to keep it secure

What is client portal software?

Clients email to ask where things stand, documents travel as attachments to the wrong inbox, and the same file gets requested twice. Client portal software moves all of that into one place: each client signs in and finds their own records, and nobody else’s. An accounting firm’s clients upload receipts and download their returns. A property manager’s owners see monthly statements and open work orders. A contractor’s customers approve change orders and pay invoices.

Most portals are assembled from the same parts:

• Sign-in: an account for each person, with a second factor.
• Their records: orders, jobs, cases, statements or project status, limited to that client.
• Files: documents to download and uploads to send, kept out of email.
• Forms and approvals: requests, sign-offs and e-signatures.
• Messages: one thread per client in place of scattered emails.
• Payments: invoices paid inside the portal.

How do client, customer, partner and vendor portals differ?

The parts stay the same. What changes is who signs in and which records each of them may see:

Customer portal software and client portal software mostly mean the same thing. Partner portal software and vendor portal software are narrower: they carry the deals, orders and invoices those relationships run on, so each partner or supplier sees only its own.

Should you buy client portal software or build your own?

Buy when the portal’s job is sharing. Build when its job is showing your own records. Buying fits when:

• The portal shares rather than shows: files, invoices, forms and messages are what portal products are made for.
• A system you already pay for includes one: if your accounting, practice management or project software offers a client portal, switching it on may be all you need.
• The service is standard: your clients need what every client of a firm like yours needs.

Building fits when:

• Clients need live records from your systems: order status, job progress, stock levels or account history, from the systems where your team keeps them.
• The portal is part of what you sell: clients choose you partly for what they can do in it.
• Several kinds of outsider share it: clients, partners and vendors each see a different slice of the same records.
• Per-user fees don’t fit: a product priced per portal user can grow faster than the accounts are worth to you.

What are the options between buying and building?

Between a portal product and your own code sit builders that assemble a portal on data you already keep. From their makers’ pages, read November 2026:

• Softr: builds portals for clients and vendors, and internal tools, with no developer required, on Airtable, Google Sheets or its own database.
• Power Pages: Microsoft’s low-code service for creating, hosting and running business websites for people outside the company, a fit when your records already sit in Microsoft Dataverse.
• Retool: external users and embedded apps start on its Business plan, with external users priced in volume tiers.
• A WordPress plugin: for a site already on WordPress, covered further down.

Each of these inherits its platform’s limits: what the builder can show, how its permissions work, and how its fees grow with the number of people signing in.

How do you build a client portal for your business?

Whatever the base, the work runs in the same order:

1. Decide what clients will do there: the three or four requests that cause the most emails and calls now.
2. List what each client may see: their own records, their whole company’s, or a slice of someone else’s, such as a partner’s view of the clients they referred.
3. Choose the base: a product, a builder or your own code, by the tests above.
4. Set up sign-in: one account per person rather than one shared login per company, with a second factor.
5. Check access on the server: every request for a record confirms that this person may see it, so editing an ID in a link returns nothing.
6. Plan the people side: who invites clients, who removes them when they leave, and who answers when someone can’t sign in.
7. Test with two real accounts: sign in as two different clients and try to open each other’s records.

How do you create a client portal in WordPress?

WordPress can run a simple portal, and its roles are the place to start. It ships with six pre-defined roles, from Super Admin, which has every capability, to Subscriber, a user who can only manage their own profile, and new roles can be added in code (WordPress.org, September 2026). A plugin does the rest:

• Give each client a Subscriber account: enough to sign in, with no power to edit the site.
• Add a client portal plugin: the WordPress.org plugin directory lists several that give each user private pages and files. Pick one that’s maintained, from a source you trust: WordPress’s hardening guide warns against plugins and themes from untrusted sources.
• Keep private files private: a page that hides a file’s link doesn’t protect the file itself. Client documents need a plugin or storage that checks who is signed in before it serves each one.
• Turn on two-step sign-in: the same guide asks for strong passwords and calls two-step authentication a good idea.
• Keep it all updated: it also says to keep WordPress and its plugins up to date, and to delete plugins you don’t use (October 2026).

A plugin portal suits file sharing and simple private pages. It gets harder when clients need records from another system, because every connection becomes custom code inside the site, and every plugin is one more thing to keep updated.

What does a client portal need to be secure?

The first risk to check is one client seeing another client’s records. The rest of the list follows from there:

• Access checked on the server, for every record: OWASP’s Top 10 for 2025 ranks broken access control first, and every application it tested had some form of it. Its advice is to deny by default, enforce access in trusted server-side code, and tie each record to its owner, so a user who changes an account number in a link still can’t open someone else’s account.
• A second sign-in factor: a study posted in May 2023, on Microsoft Azure Active Directory accounts that showed suspicious activity, found that multifactor authentication cut the risk of an account being compromised by 99.22%, and by 98.56% where the credentials had already leaked.
• The rules that apply to you: the FTC’s Safeguards Rule requires the financial institutions it covers, such as mortgage brokers, tax preparers and check cashing businesses, to use multi-factor authentication for anyone accessing a system that holds or connects to customer information, unless the person who oversees their security program approves reasonably equivalent controls in writing. It also requires them to review their access controls periodically (16 CFR 314.2 and 314.4, revised as of January 1, 2026).
• Encrypted connections: HTTPS on every page, with files encrypted where they’re stored.
• A log of who did what: sign-ins, views of sensitive records and every change, kept where users can’t edit it. OWASP’s 2025 list puts security logging and alerting failures ninth.
• Offboarding and reviews: remove access when a contact leaves or a client relationship ends, and go through the account list on a schedule.

What goes wrong with client portals?

Most portal problems show up after launch, not in the demo:

• Shared logins: one password per client company, passed around by email, so nobody can say who did what.
• Access checked only on screen: the menu hides other clients’ records, but the server returns them to anyone who asks for them directly.
• Nobody looks after the accounts: logins pile up for people who left long ago.
• Clients don’t use it: if an email still gets a faster answer, clients keep emailing. The portal has to be the quickest way to get what they need.
• Stale data: a portal that shows last week’s status sends clients back to the phone.

How is an employee portal different from a client portal?

Both are logins to your records, and the differences come from who signs in. An employee portal serves your own staff, usually through the company’s own sign-in, with policies, pay, schedules and the tools they use at work. A client portal serves people outside your business, each with an account of their own, and every screen has to hold them to their own records. Inviting, removing and supporting those outside accounts is work an employee portal mostly doesn’t have.

In practice an employee portal is an internal tool with a front page, and the guide on how to build internal tools covers choosing a builder for one.

What should you do first?

Before you look at any product, gather the facts that decide between them:

1. Count the emails and calls a portal would answer, by type, over one month.
2. List the records clients ask about most, and the system each one lives in.
3. Decide who may see what: per person, per company and per partner.
4. Check what your systems already include: a portal you already pay for may only need switching on.
5. Price each option over five years for the number of client accounts you expect.
6. Ask each vendor how access is checked on the server, then test it yourself on a trial.

Portals are part of our client portals and internal tools work. What we would build is a client or affiliate portal for one business, with its code in its own repository, showing your clients the records your team already keeps. If a portal product would serve your clients better, a 15-minute call is where we’ll tell you.