General Business ServicesInvoicing & Billing3MediumOwner$ implied

The user needs an invoicing solution that includes a feature for clients to sign quotes or invoices to approve work before it begins.

Wave Invoicing lacks a feature for clients to digitally sign quotes or invoices to indicate approval before work begins.

Opp. Score

Severity

3Medium

Willingness to Pay

implied

Added

Oct 7, 2026

App Concept

SignFlow Invoicing

SignFlow Invoicing is a cloud-based invoicing platform that seamlessly integrates digital signature capture into quotes and invoices. It allows businesses to send professional documents that clients can sign electronically, providing clear approval and reducing disputes. Unlike Wave, SignFlow focuses on a streamlined approval workflow that ensures work begins only after client sign-off.

Key Features

Digital signature capture on quotes and invoices
Automated approval workflow with reminders
Audit trail with timestamps and IP addresses
Integration with popular accounting software

Target Users: Small business owners and freelancers who need client approvals before starting work

Revenue Model: $15/mo per user SaaS subscription with a free tier for basic invoicing

Existing Solutions Mentioned

Wave Invoicing

Part of App Idea

PayFlow Invoicing

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