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Automate billing processes, manage subscriptions and gain insights with UniBee's open-source billing and payment management software. | Brisk Invoicing is a simple online invoicing software for freelancers and small businesses to create professional invoices, manage clients and track payments with ease. It helps automate recurring invoices and keep billing organized, so you get paid faster with less effort. |
Automate billing | create invoice, client and customer management, recurring invoice automation, payment tracking, financial reports, simple and user-friendly dashboard |
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Qonversion allows fast in-app subscription implementation. It provides the back-end infrastructure to validate user receipts and manage cross-platform user access to paid content on your app, so you do not need to build your own server.

RevenueCat is a scalable backend for in-app subscriptions and purchases. It provides all of the tools you need to build, analyze, and grow subscription apps on any platform.

Inventory, invoicing, time tracking, expenses, and hundreds of other apps all seamlessly integrate with Xero to save your business precious time and money.

It is a business management software including CRM, e-commerce, billing, accounting, manufacturing, warehouse, project management, and inventory management.

It is a free, online software alternative to Quickbooks. Wave helps manage invoices, credit card payments, accounting & payroll. Best for small businesses & freelancers.

Monthly Recurring Revenue (MRR), Churn, ARPU, Lifetime value and much more. Choose between multiple churn formulas and filter your metrics by custom plans and regions.

Sidemail is an all-in-one email delivery platform for startups that makes sending emails simple. It has everything for delivering and managing emails – email API, transactional emails, email marketing and automation, contact management, no-code email editor, email templates, subscribe forms, and more. Perfect for teams & developers that want reliable deliverability without the bloat. We're based in the EU and GDPR compliant.

Kipplo is a B2B contact data and enrichment platform built for sales, marketing, recruitment, and growth teams. It provides access to a large global database of business contacts and company profiles. Access 500M+ verified B2B contacts worldwide, including key decision-makers. Scale your outreach and accelerate deal closures. Teams use Kipplo to search, reveal, and export verified emails and phone numbers, enrich datasets using a credit-based model, and integrate contact data into their workflows using secure API access. All data is maintained in compliance with GDPR and CCPA, supporting responsible and privacy-compliant outbound, prospecting, and research activities.

One simple link for all your payment methods. Create your professional payment page in under 60 seconds. Accept PayPal, Venmo, Cash App, Stripe, and more. Free forever.

Is the modern studio management platform for dance schools, music academies, and performing arts centers. Automated enrollment, billing, family portal, attendance tracking, and communications. Try free for 30 days.