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About

BillSend makes it simple for tradespeople to send professional quotes and invoices — no accounting software required. Every document is automatically branded with your logo, colours, and contact details. Quotes convert to invoices in one click, with no duplicate data entry. Customers approve quotes via a shareable link — no login needed — and pay directly through the invoice using Stripe. A pipeline view shows the status of every quote and invoice: sent, viewed, approved, or overdue, with automated reminders so you're not chasing payments manually. Works across mobile and desktop, supports multiple currencies for international clients, and includes reusable templates for repeat jobs. A free invoice generator and quote calculator are also available without creating an account.

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.

Platforms Supported

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

Small Businesses, Freelancers, Sole Traders, Self-Employed

Audience

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

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

Screenshots and Videos

No images available

Pricing

£15/mo or £144/y
Free usage available, £15 per month or £144 per year for unlimited usage.
Free Version Supported
Free Trial Not Supported

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

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

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

Pros & Cons from Real Users

Pros

  • Simple and easy to use. I like that I can save my clients' details, so when the same client comes back with more work, I can create another invoice or quote without having to enter all their information again. It saves me time and makes invoicing repeat clients much easier.

Cons

  • I have not had any major problems with the app so far.

Training

Documentation 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

BillSend
Founded: 2026
billsend.net

Company Information

Coretool
Germany
coretool.de/en

Alternatives

Alternatives

E‑Rechnungs-Studio

E‑Rechnungs-Studio

Casserus UG (haftungsbeschränkt)
Facture Éclair

Facture Éclair

SILEMA (Structure Web)
ViperJob

ViperJob

OneBazaar
xSuite

xSuite

xSuite Group
BillingHub

BillingHub

Evax LLC
Facturwise

Facturwise

Billio Software Services s.r.o.

Categories

Categories

E-Invoicing Supported

Integrations

Apple Calendar Not Supported
Google Calendar Not Supported
Make Not Supported
Microsoft Outlook Not Supported
Zapier Not Supported
n8n Not Supported

Integrations

Apple Calendar Supported
Google Calendar Supported
Make Supported
Microsoft Outlook Supported
Zapier Supported
n8n Supported
Claim BillSend and update features and information
Claim BillSend and update features and information
Claim Coretool and update features and information
Claim Coretool and update features and information