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What is Stacks?

Stacks is a comprehensive hosted CRM and business workspace that integrates a variety of features, such as managing customer records, sales processes, follow-up tasks, email marketing, review solicitations, invoicing, appointment management, support ticket oversight, and time tracking within a single platform. By enabling shared access to customer data and activity logs, it allows solo entrepreneurs, freelancers, and small teams to efficiently manage leads, sales, billing, bookings, and customer service in a collaborative manner. Users can organize contacts and deals, craft marketing emails, request feedback, generate quotes and invoices, showcase their availability, manage support tickets, and track tasks and billable hours seamlessly. The primary plan provides all seven modules for free, allowing unlimited users and contacts, while the complimentary version includes 50 one-time AI credits, with options for paid plans for greater AI usage. Moreover, businesses can easily integrate their own Stripe accounts for payment processing and connect with a variety of supported email services for effortless communication. Additionally, a REST API and MCP endpoint offer scoped access for smooth software integrations, enhancing the platform's functionality. This all-encompassing solution guarantees that users have every essential tool at their disposal to optimize their operations and foster stronger customer relationships, ultimately driving business growth.

What is Invoice Master?

Invoice Master is a web-based invoicing and CRM solution tailored for freelancers and small businesses. It enables users to create and manage invoices and quotes with ease, track expenses, maintain customer and product records, operate with multiple currencies, and share public links to documents. Instead of sending immediate emails to clients or processing payments right away, the software allows for the scheduling of draft invoices that require user approval first. While the Free plan imposes limits on monthly activities, the Premium plan significantly expands features to include unlimited core records, Stripe-hosted invoice payment links, scheduled sending options, notifications, file attachments, documents without watermarks, and tools for managing payment reminders. Furthermore, Stripe takes care of all checkout processes, offering various payment options, managing transaction fees, resolving disputes, and facilitating payouts, thereby ensuring a seamless financial experience. This extensive array of features positions Invoice Master as an essential tool for efficient invoicing and customer relationship management, making it particularly beneficial for those in freelance and small business environments. With its user-friendly interface and robust capabilities, the platform truly stands out in the competitive landscape of invoicing solutions.

Media

Media

No images available

Integrations Supported

Brevo
Model Context Protocol (MCP)
Resend
SendGrid
Stripe

Integrations Supported

API Availability

Has API

API Availability

Pricing Information

$0/month
The Free plan costs $0 per month and includes all seven modules, unlimited users and contacts, and 50 one-time AI credits.
Free Version

Pricing Information

Free; Premium $15/month
Free Version

Supported Platforms

SaaS

Supported Platforms

SaaS

Customer Service / Support

Web-Based Support

Customer Service / Support

Web-Based Support

Training Options

Documentation Hub

Training Options

Not specified

Company Facts

Organization Name

Vantage Technologies, LLC

Date Founded

2026

Company Website

stackscrm.com

Company Facts

Organization Name

Invoice Master

Company Location

Germany

Company Website

invoicemaster.org

Categories and Features

CRM

Not specified

Categories and Features

Billing and Invoicing

Not specified

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