Stacks

Stacks

Vantage Technologies, LLC
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About

Invoice Master is browser-based invoicing and lightweight CRM software for freelancers and small businesses. Create and manage invoices and quotes, track expenses, maintain customer and product records, work across currencies, and share public document links. Recurring schedules generate draft invoices for review rather than automatically emailing customers or charging them. The Free plan covers limited monthly usage. Premium adds unlimited core records, Stripe-hosted invoice payment links, scheduled sending, notifications, attachments, watermark-free documents, and payment follow-up controls. Stripe controls checkout, payment methods, fees, disputes, and payouts.

About

Stacks is a hosted CRM and business workspace that brings customer records, sales pipelines, follow-up tasks, email campaigns, review requests, invoicing, appointment booking, support tickets and time tracking into one service. Shared customer records and activity history help solo operators, freelancers and small teams manage leads, sales, billing, bookings and customer support together. Users can maintain contacts and deals, create marketing emails, request feedback, issue estimates and invoices, publish availability, manage tickets, and track tasks and billable time. The core plan includes all seven modules for $0 per month with unlimited users and contacts. Free includes 50 one-time AI credits; an optional paid plan extends AI access. Businesses can connect their own Stripe account for payments and supported email providers for delivery. A REST API and MCP endpoint allow scoped access for software integrations.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Freelancers and small businesses that need straightforward cloud invoicing, quotes, expense tracking, customer records, recurring invoice drafts, and optional online payment workflows.

Audience

Solo operators and small teams who want customers, sales, billing and bookings in one place, with room for their team and AI agents.

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

Free; Premium $15/month
Free Version Supported
Free Trial Not Supported

Pricing

$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 Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Invoice Master
Germany
invoicemaster.org

Company Information

Vantage Technologies, LLC
Founded: 2026
stackscrm.com

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Categories

Categories

CRM Supported

Integrations

Brevo Not Supported
Model Context Protocol (MCP) Not Supported
Resend Not Supported
SendGrid Not Supported
Stripe Not Supported

Integrations

Brevo Supported
Model Context Protocol (MCP) Supported
Resend Supported
SendGrid Supported
Stripe Supported
Claim Invoice Master and update features and information
Claim Invoice Master and update features and information
Claim Stacks and update features and information
Claim Stacks and update features and information