Zervant

Zervant

Zervant Oy
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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.

About

Easy invoicing software for entrepreneurs. With Zervant you have a simple overview of all of your quotes and invoices. Automate your invoicing by creating quotes and invoices in just 60 seconds – add your customer, your product, hit send and you’re done! You can create an unlimited amount of email invoices for free. However, should there ever be a time where you need additional tools such as mobile apps, time tracking, e-invoicing, paper invoices, payment reminders and more, we’ve got you covered. Just subscribe to our Premium plans with a 14-day free trial. What our customers say about Zervant: "It’s easy to track time for customers/projects and the hours are automatically transferred to the invoice correctly." - Joni Lehto, Grove Development "Invoices are paid exactly on time, directly when the customers get the payment reminder" - Danny, DTS Service & Vertrieb

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 Supported
iPad Supported
Android Supported
Chromebook Not Supported

Audience

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

Audience

Small entrepreneurs

Support

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

Support

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

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

No images available

Screenshots and Videos

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

Pricing

free / 8€ per month
A free version is available. A 3-tiered monthly / annual plan available including additional features such as mobile app, reminders, e-invoicing etc.
Free Version Supported
Free Trial Supported

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

Training

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

Company Information

Coretool
Germany
coretool.de/en

Company Information

Zervant Oy
Founded: 2010
Finland
www.zervant.com

Alternatives

E‑Rechnungs-Studio

E‑Rechnungs-Studio

Casserus UG (haftungsbeschränkt)

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Facturwise

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xSuite

xSuite Group
BillyBox

BillyBox

Hormesis Labs
Facturwise

Facturwise

Billio Software Services s.r.o.

Categories

E-Invoicing Supported

Categories

Billing and Invoicing Features

Billing Portal Supported
Contact Database Supported
Contingency Billing Not Supported
Customer Portal Supported
Customizable Invoices Supported
Dunning Management Not Supported
Hourly Billing Supported
Invoice History Supported
Mobile Payments Not Supported
Multi-Currency Supported
Online Invoicing Supported
Online Payments Supported
Payment Processing Supported
Project Billing Supported
Recurring/Subscription Billing Supported
Service Ticket Billing Not Supported
Tax Calculator Supported

Integrations

Apple Calendar Supported
Desktop.com Not Supported
Google Calendar Supported
Make Supported
Microsoft Outlook Supported
Zapier Supported
n8n Supported

Integrations

Apple Calendar Not Supported
Desktop.com Supported
Google Calendar Not Supported
Make Not Supported
Microsoft Outlook Not Supported
Zapier Not Supported
n8n Not Supported
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