SumlinoWebInferio
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Related Products
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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.
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Sumlino:
About
Sumlino is web-based invoicing and customer management software for freelancers, small businesses, studios, schools and clubs. Users can create branded invoices, quotes and credit notes, manage customer groups, track hours and business trips, and turn recorded work into draft invoices. Quotes can be accepted online using an email code. Other features include receipt uploads, recurring invoices, stock tracking, bank statement imports, bookkeeper access and data exports. Mollie supports payment links and direct debit, with approval required for each collection period. The website is available in Dutch and English. New users receive five free documents, then pay per document or choose an Unlimited subscription. Optional AI extraction helps process purchase invoices, with user review before import. Dutch calculators and practical guides are available without an account. Direct tax filing and automatic bank feeds are not included.
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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
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Sumlino:
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
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Coretool:
Audience
Businesses, freelancers and sole traders in Germany that need to issue e-invoices (XRechnung, ZUGFeRD)
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Sumlino:
Audience
Freelancers, small businesses, studios, service providers, schools and membership organisations, especially in the Netherlands.
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Coretool:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Sumlino:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Coretool:
API
Offers API
Supported
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Sumlino:
API
Offers API
Not Supported
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Coretool:
Screenshots and VideosNo images available
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Sumlino:
Screenshots and VideosNo images available
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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
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Sumlino:
Pricing
EUR 0.75/quote excl. VAT
Free Version
Not Supported
Free Trial
Supported
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Coretool:
Reviews/
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Sumlino:
Reviews/
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Coretool:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Sumlino:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Coretool:
Company InformationCoretool
Germany
coretool.de/en
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Sumlino:
Company InformationWebInferio
Netherlands
sumlino.com
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Coretool:
Alternatives |
Sumlino:
Alternatives |
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Coretool:
Categories |
Sumlino:
Categories |
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Coretool:
Integrations
Apple Calendar
Supported
Google Calendar
Supported
Make
Supported
Microsoft Outlook
Supported
Zapier
Supported
n8n
Supported
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Sumlino:
Integrations
Apple Calendar
Not Supported
Google Calendar
Not Supported
Make
Not Supported
Microsoft Outlook
Not Supported
Zapier
Not Supported
n8n
Not Supported
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Coretool:
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Sumlino:
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