Client portal invoicing software for service businesses

Which invoicing platforms offer client-facing access?

The comparison below was checked against the linked official documentation on October 27, 2026. It describes documented access patterns; payment methods, geographic availability and subscription limits still need checking for your configuration.

These are different approaches, not a best-to-worst ranking. A customer who only needs to pay may prefer a direct link. A customer reviewing several documents may need persistent authenticated access. Test that distinction with an external account rather than relying on the team's own view.

What should the customer be able to do?

Use one fictional project with an approved proposal, a supporting document and an invoice. Ask a colleague with customer-level access to find the scope, explain the balance, open the intended file and reach the payment step. Do not make a real payment for this evaluation.

Then check a second customer cannot see the first customer's records. Revoke a shared link or remove access and verify the result. File permissions, invoice access and project visibility may be separate controls; passing one test does not prove the others work.

Public payment links and portal seats are different

Workspace369's published plan matrix lists public invoice and payment links on every plan, so a recipient can view and pay an invoice without an account. Every plan also includes a private, branded client portal where each client sees their projects, task boards, comments and invoices to view and pay.

Monthly USD subscriptions include one member seat on Cadet at $29, two on Voyager at $74 and ten on Specialist at $149. Additional member seats cost $10 per month from Voyager. Request tracking is included on every plan; online booking and payment plans start at Specialist. Confirm the access model before inviting clients as workspace members.

Keep the team's work connected to the invoice

A useful billing record answers who requested the work, what was approved, who owns delivery and which balance remains. In Workspace369, evaluate proposals, invoices, files and the client record as separate steps in that workflow.

For example, an agency receives a request for an additional landing page. The account owner records it, confirms the new scope with the client and reviews the invoice before sending it. A payment link is the final customer action; it should not silently approve the additional scope or mark the work complete.

What still needs a human or another system?

Do not assume an incoming email automatically becomes a deduplicated request, or that a paid invoice completes a project. Recurring invoices and retainers are on every plan, so a monthly agreement can bill on a schedule, and late-payment reminders follow up automatically. Assign an owner to review scope changes, exceptions and failed reminders, and ask for an end-to-end demonstration of any automation the purchase depends on.

Choose from the client's actual task

Choose a billing portal when persistent invoice history is the main need. Choose a broader workspace when the team also needs scope, delivery and communication context. Keep specialist document signing, accounting or file delivery tools when they meet a requirement the proposed replacement cannot demonstrate.

Use the request-capture workflow to evaluate intake, or the service invoicing setup guide to design approvals and reminders. Record the required plan, manual steps and access limitations before comparing total cost.