InvoiceLead

InvoiceLead

Quantum Liquid
Coretool InvoiceLead

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Coretool:

About

Coretool is a browser-based invoicing application for German businesses, freelancers, sole traders, tradespeople, and small service businesses. Users can create and manage quotes and invoices, including XRechnung and ZUGFeRD e-invoices, track customers, send payment reminders, and organize appointments. The app supports GiroCode QR codes, digital quote signatures, and validation of e-invoice documents through its REST API. API-based workflows can connect with automation tools such as Make, Zapier, and n8n; availability of some platform-specific modules may depend on approval. Calendar feeds can be added to Google, Apple, or Outlook calendars. The optional Kalkulations-Assistent supports project estimates, material and labor calculations, and quote creation. Coretool runs in a web browser without local installation. Its free plan allows three invoices per month; Solo costs €9/month plus VAT and can be canceled monthly.
InvoiceLead:

About

InvoiceLead is a web-based invoicing and bookkeeping service for freelancers and small businesses in the United States, United Kingdom, Germany, France, and Switzerland, with an iPhone and iPad app. It creates quotes and converts accepted quotes into invoices, applies country-specific tax rules and e-invoice formats, tracks payments and overdue balances, and supports recurring invoices and payment reminders. Users can capture receipts and supplier bills for AI-assisted data entry, import bank statements for matching, and maintain double-entry books with balance sheets and income statements. Pro plans add tax-return preparation, multi-currency support, and automated reminder levels; users remain responsible for filing tax returns. InvoiceLead also includes project time tracking and an AI assistant that proposes actions for user confirmation. Documents can be generated in English, French, German, Italian, and Spanish.
Coretool:

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
InvoiceLead:

Platforms Supported

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

Audience

Businesses, freelancers and sole traders in Germany that need to issue e-invoices (XRechnung, ZUGFeRD)
InvoiceLead:

Audience

Small businesses and freelancers in the US, the UK, Germany, France and Switzerland.
Coretool:

Support

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

Support

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

API

Offers API Supported
InvoiceLead:

API

Offers API Supported
Coretool:

Screenshots and Videos

No images available
InvoiceLead:

Screenshots and Videos

Coretool:

Pricing

€0/month
The free plan includes up to 3 invoices per month. Solo costs €9/month plus applicable VAT and can be canceled monthly.
Free Version Supported
Free Trial Not Supported
InvoiceLead:

Pricing

€19/month
Free plan: €0/month with no time limit. Pro: €19/month or €190/year. Pro+: €39/month or €390/year. Prices are billed in euros, exclude VAT, and subscriptions can be cancelled at any time.
Free Version Supported
Free Trial Not Supported
Coretool:

Reviews/Ratings

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

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InvoiceLead:

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
Coretool:

Training

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

Training

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

Company Information

Coretool
Germany
coretool.de/en
InvoiceLead:

Company Information

Quantum Liquid
Founded: 2026
United States
invoicelead.io
Coretool:

Alternatives

E‑Rechnungs-Studio

E‑Rechnungs-Studio

Casserus UG (haftungsbeschränkt)
InvoiceLead:

Alternatives

No Alternatives
Coretool:
Coretool:
Coretool:
xSuite

xSuite

xSuite Group
Coretool:
Facturwise

Facturwise

Billio Software Services s.r.o.
InvoiceLead:
Coretool:

Categories

E-Invoicing Supported
InvoiceLead:

Categories

Accounting Supported
Bookkeeping Supported
E-Invoicing Supported
Coretool:

Integrations

Apple Calendar Supported
Google Calendar Supported
Make Supported
Microsoft Outlook Supported
Model Context Protocol (MCP) Not Supported
Zapier Supported
n8n Supported
InvoiceLead:

Integrations

Apple Calendar Not Supported
Google Calendar Not Supported
Make Not Supported
Microsoft Outlook Not Supported
Model Context Protocol (MCP) Supported
Zapier Not Supported
n8n Not Supported
Coretool:
Claim Coretool and update features and information
Claim Coretool and update features and information
InvoiceLead:
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