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Invoice Simple VS BizToolStack

Compare Invoice Simple VS BizToolStack and see what are their differences

Invoice Simple

Send professional invoices from your phone or laptop. The simplest invoicing software you'll ever use. Create your first free invoice today!

Rating
0 reviews
Alternatives Is it good?
BizToolStack

Free calculators and invoices for freelancers and online sellers: payment and marketplace fees, pricing, 1099 taxes and PDF invoices.

Rating
0 reviews
Pricing
Free
Alternatives Is it good?
Papertools.app
Accounting and invoicing software for small businesses. Manage invoices, bills, expenses, payroll and reports, with plain-language tools and proper double-entry bookkeeping underneath. sponsored

Which is more popular?

Billing & Invoicing popularity
100% vs 0%
alternatives listed
219 vs 4

Base details

Website, pricing, platforms and company facts side by side.

Invoice Simple
BizToolStack
Website invoicesimple.com biztoolstack.com
Pricing —
Free Official pricing
Platforms —
Web
Company — Startup from the United States · 1 - 9 employees · 2026
Listed in
Accounting Small Business Bookkeeping Billing & Invoicing +1
Invoicing Accounting , E-commerce

About Invoice Simple and BizToolStack

In their own words, as submitted to SaaSHub.

Invoice Simple
BizToolStack

No description of Invoice Simple yet.

BizToolStack is a free set of calculators and document tools for freelancers, small businesses and online sellers. Payment fees: Stripe, PayPal, Venmo and Square fee calculators, with a "what to charge" mode to receive a target amount. Marketplace seller fees: Etsy, Poshmark and Mercari...

Read more about BizToolStack

Features and specs

What each product offers, as listed by its team.

Invoice Simple 5 features
BizToolStack 6 features
  • User-Friendly Interface
    Invoice Simple offers a clean and intuitive interface, making it easy for users to create and manage invoices quickly without extensive training.
  • Mobile Accessibility
    The platform provides robust mobile apps for both iOS and Android, allowing users to create and send invoices on the go.
  • Customizable Templates
    Users can choose from a variety of templates and customize them to fit their brand, ensuring a professional look for all invoices.
  • Integration with Payment Gateways
    Invoice Simple integrates with popular payment gateways, facilitating easy online payments directly from invoices.
  • Expense Tracking
    The platform includes features for tracking expenses, helping users keep their financial records organized.

Possible disadvantages

  • Limited Advanced Features
    Compared to some competitors, Invoice Simple may lack certain advanced features such as in-depth reporting and inventory management.
  • Subscription Costs
    Some users may find the subscription costs higher than expected, especially if they only require basic invoicing features.
  • Limited Integrations
    Invoice Simple offers fewer integrations with other business tools and software, which could be a limitation for users looking for comprehensive integration options.
  • Lack of Multi-Currency Support
    The platform might not fully support multi-currency invoicing, which can be a drawback for businesses dealing with international clients.
  • No Free Plan
    Invoice Simple does not offer a free plan, which means users must subscribe to a paid plan after a trial period to continue using the service.
  • Payment fee calculators
    Stripe, PayPal, Venmo and Square fees, plus what to charge to receive a target amount
  • Marketplace seller fees
    Etsy, Poshmark and Mercari fees and what you actually keep
  • Pricing calculators
    Markup, retail, wholesale, cost-plus and gross profit
  • Freelancer tax estimates
    2026 self-employment and 1099 tax, with a quarterly set-aside amount
  • Invoices and estimates
    Create professional PDF invoices and estimates in the browser
  • Sourced rates
    Every rate links to its official source with a last-verified date

Videos

Walkthroughs and reviews on video.

Invoice Simple 1 video + Add
BizToolStack 0 videos + Add

How To Use Invoice Simple - Invoice Simple Tutorial For Beginners (2022)

No BizToolStack videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Invoice Simple
BizToolStack
100% 100%
Billing & Invoicing
0% 0%
0% 0%
Accounting
100% 100%
97% 97%
Invoicing
3% 3%
100% 100%
Small Business
0% 0%

Questions & Answers

As answered by people managing Invoice Simple and BizToolStack.

What makes your product unique?

BizToolStack's answer:

Every fee and tax rate links to its official source (IRS, SSA, Etsy, Square, PayPal and others) with the date it was last verified, and the site refuses to build if a rate goes unchecked for more than 92 days. All calculations run in your browser with exact decimal math, and nothing you type is sent to a server.

Why should a person choose your product over its competitors?

BizToolStack's answer:

It is free with no signup, and it covers the whole job in one place: set a price, check what Etsy or Stripe will take, estimate the tax on what you keep, then send an invoice. Most fee calculators only cover one platform and do not show where their rates come from.

How would you describe the primary audience of your product?

BizToolStack's answer:

US freelancers, independent contractors, small business owners and online sellers on Etsy, Poshmark, Mercari and similar marketplaces.

What's the story behind your product?

BizToolStack's answer:

BizToolStack started as a simple markup calculator and grew into a set of tools for the questions small sellers and freelancers ask every week: what will this platform take, what should I charge, and how much should I set aside for taxes.

Which are the primary technologies used for building your product?

BizToolStack's answer:

Astro, React and TypeScript, with big.js for exact decimal math, Valibot for data validation and pdfmake for PDF generation. The site is static and runs on Cloudflare.

User comments

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Alternatives to Invoice Simple and BizToolStack

When comparing Invoice Simple and BizToolStack, you can also consider the following products.

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