Integrations

Connect your store or accounting software to slimzaak

Direct integrations with marketplaces and webshops like bol.com, Amazon, Shopify and WooCommerce for automatic invoices — and with accounting platforms like Exact Online, Moneybird and e-Boekhouden for a seamless handoff to your accountant.

AFAS integration

Connect AFAS to your invoicing, automatically updated

slimzaak connects directly to AFAS via OAuth2 and keeps your accounting up to date on its own. Customers, sales invoices, expenses, and receipts flow through automatically to AFAS as sales and purchase entries, so you never have to enter anything twice. Your VAT return data is prepared in AFAS, ready for you or your accountant to file with the tax authorities. slimzaak doesn't replace AFAS — it's where invoices, quotes, expenses, receipts, and marketplace orders come together before flowing automatically and in a structured way into your AFAS records. If you work with multiple webshops or marketplace integrations, everything comes together in slimzaak in one central place, ready to flow through to AFAS.

Allegro integration

Your Allegro accounting, fully automated

slimzaak connects directly to your Allegro seller account, the largest marketplace in Poland. The moment an order comes in, slimzaak automatically generates a VAT-compliant invoice, sends it, and archives it. Selling from the Netherlands into Poland and the rest of Eastern Europe? slimzaak automatically applies the right Dutch VAT rules and the EU OSS scheme. Your payouts are reconciled automatically against your invoices and costs too, so your books are always accurate.

Amazon integration

Accounting for Amazon sellers, without the manual work

slimzaak automatically turns every Amazon order into a VAT-compliant invoice and handles the VAT on your EU sales through the OSS scheme. If you also sell via bol.com, Shopify or WooCommerce alongside Amazon, you manage everything in one administration. That's how you keep your books as an Amazon seller — without manual work.

bol.com integration

Your bol.com accounting, fully automatic

slimzaak connects directly to your bol.com seller account and automatically turns every bol order into a VAT-compliant invoice. Your payouts are automatically reconciled with your invoices and costs, and you manage your reviews from the same dashboard. Your entire bol administration runs itself — no manual work.

CCV Shop integration

Automatic administration for your CCV Shop store

slimzaak connects directly to your CCV Shop store. As soon as an order comes in, a VAT-compliant invoice is automatically created, sent and archived. Returns automatically become credit notes, Dutch VAT rules and the EU OSS scheme are applied without extra work, and your stock stays synchronized across all your channels. That's how you automate the complete accounting for your CCV Shop store.

Craft Commerce integration

Automatic invoicing for your Craft Commerce store

slimzaak connects directly to your Craft Commerce store. The moment an order comes in, a VAT-compliant invoice is created, sent, and archived automatically. Returns are handled with automatic credit notes, and Dutch VAT rules and the EU OSS scheme are applied without any manual work. That means a complete, error-free administration alongside your custom store.

DATEV integration

Connect DATEV with slimzaak

Work with a German accountant or Steuerberater who uses DATEV, or sell on German marketplaces like Kaufland and OTTO? Then you can connect slimzaak to DATEV in a few minutes via OAuth2. From that moment on, your customers, sales invoices and expenses flow through automatically as bookings, and your VAT return sits ready to be filed. slimzaak doesn't replace DATEV — it's the invoicing and admin tool that automatically pushes your Dutch VAT-compliant invoices and marketplace orders (bol.com, Amazon, Shopify, WooCommerce, Kaufland, OTTO) into your accounting software.

e-Boekhouden integration

Your e-Boekhouden records, filled in automatically from your sales

slimzaak isn't a replacement for e-Boekhouden - it's the invoicing and admin layer that sits in front of it. When you sell through bol.com, Amazon, Shopify, or WooCommerce, slimzaak turns those orders into VAT-compliant invoices automatically, and reads incoming receipts with AI scanning the moment they arrive. Once you connect e-Boekhouden (via OAuth2), slimzaak pushes all of that straight into your books, with nothing left to type in by hand. You or your accountant simply check the result and file the VAT return yourselves, directly from e-Boekhouden.

eBay integration

Bookkeeping for eBay sellers, without the manual work

eBay is one of the best-known marketplaces worldwide, with an audience ranging from private sellers to professional webshops. If you sell on eBay, you connect your seller account directly to slimzaak. As soon as an order comes in, a VAT-compliant invoice is automatically created, sent, and archived, and returns automatically become credit notes. Dutch VAT rules and the EU OSS scheme are applied automatically along the way, so your books are ready for your VAT return.

Etsy integration

Your Etsy accounting, fully automated

As an Etsy maker, you often sell to customers across dozens of countries in one go — and that can turn your bookkeeping into a puzzle fast. slimzaak connects directly to your Etsy seller account and automatically turns every order into a VAT-compliant invoice. Returns become credit notes automatically, and Dutch VAT rules plus the EU OSS scheme are applied correctly from the start. That leaves you more time for what you do best: making things.

Exact Online Integration

Connect Exact Online with slimzaak

slimzaak isn't a replacement for Exact Online — it's where your invoices, quotes, expenses, receipts, and marketplace orders all come together. Through a direct OAuth2 connection, your customers, sales invoices, and expenses flow automatically into Exact Online, so you or your accountant never have to retype them. Your day-to-day admin stays organized in slimzaak, while your financial figures stay accurate and up to date in Exact Online. Invoices generated from orders on connected webshops and marketplaces like bol.com, Amazon, Shopify, and WooCommerce are included automatically too. That way you get the convenience of slimzaak combined with the accounting power of Exact Online, with no duplicate work or manual retyping at the end of the month.

Kaufland.de integration

Your Kaufland.de accounting, fully automated

slimzaak connects directly to your Kaufland.de seller account. The moment an order comes in, a VAT-compliant invoice is automatically created, sent, and archived. If you sell cross-border into Germany or Czechia, slimzaak automatically applies Dutch VAT rules and the EU OSS scheme. Returns become credit notes on their own, and your payouts are reconciled against your invoices and costs, so your entire Kaufland administration stays accurate without manual work.

Lightspeed integration

From Lightspeed sale to invoice, automatically

slimzaak connects directly with your Lightspeed eCom webshop or your Lightspeed C-Series point-of-sale system. The moment an order or sale comes in, the invoice is ready — automatically created, sent, and archived. Whether you sell online through eCom, sell from the shop floor with C-Series, or run both side by side, your bookkeeping keeps pace on its own. You focus on selling, slimzaak handles the rest.

MediaMarkt integration

Your MediaMarkt accounting, fully automated

slimzaak connects directly to your MediaMarkt seller account, which runs on Mirakl marketplace technology like several other marketplaces. The moment an order comes in, slimzaak automatically creates a VAT-compliant invoice, sends it, and archives it. Returns become credit notes on their own, and MediaMarkt's payouts are reconciled against your invoices and costs. Your entire MediaMarkt admin runs itself, with no manual work.

Moneybird integration

Your Moneybird bookkeeping, filled automatically from every sales channel

Moneybird is an accessible accounting package where you can perfectly well create invoices yourself — slimzaak doesn't change that. What slimzaak adds: orders from bol.com, Amazon, Shopify, and WooCommerce are automatically turned into invoices, receipts are read and processed with AI, and everything is automatically pushed to your Moneybird bookkeeping. You keep booking in Moneybird the way you're used to, without having to retype marketplace orders by hand.

OTTO Market integration

Accounting for OTTO Market sellers, without the manual work

slimzaak connects directly to your OTTO Market seller account. The moment an order comes in, slimzaak automatically creates a VAT-compliant invoice, sends it to your customer, and archives it in your records. If you sell from the Netherlands to Germany, slimzaak automatically applies Dutch VAT rules and the EU OSS scheme. That way, as an OTTO seller, you stay in control of your invoicing, VAT, and payouts without any manual work.

Sage Integration

Connect Sage Business Cloud with slimzaak

slimzaak isn't a replacement for Sage Business Cloud — it's the invoicing and admin tool for your Dutch VAT-compliant invoices and your marketplace orders from bol.com, Amazon, Shopify, and WooCommerce. Connect your Sage account once via OAuth2, and from that point on slimzaak automatically syncs your customers, sales invoices, and expenses into your Sage accounting. Your receipts too — already read automatically by slimzaak's AI scan — land in Sage as purchase entries. That way your accountant keeps working in Sage, while you create invoices and process marketplace orders in slimzaak.

Shopify integration

From Shopify order to invoice, automatically

slimzaak connects to your Shopify store in just a few minutes and automatically turns every order into a VAT-compliant invoice. The Dutch VAT rules and the EU OSS scheme are applied automatically, so your invoices are correct for your return. You run your store, slimzaak does the books.

Shopware integration

From Shopware order to invoice, automatically

slimzaak connects directly to your Shopware store, whether you're running version 5 or version 6. As soon as an order comes in, slimzaak automatically creates a VAT-compliant invoice, sends it, and archives it. Selling from the Netherlands into Germany? Dutch VAT rules and the EU OSS scheme are applied automatically. You run your store, slimzaak handles the bookkeeping.

SnelStart integration

Connect SnelStart with slimzaak

slimzaak isn't a replacement for SnelStart — it's the invoicing and admin tool that prepares everything before it lands in your bookkeeping. You connect SnelStart to slimzaak with an API key, no fiddly OAuth login screen, just paste in a key and you're done. From there, your customers, sales invoices, expenses, and receipts flow through to SnelStart automatically, with your VAT return sitting ready to file. Many SnelStart users are freelancers and small business owners, exactly the audience slimzaak's Free Freelancer plan is built for: you start invoicing at no cost and let everything flow automatically into your existing SnelStart bookkeeping.

Twinfield integration

Twinfield integration: your books ready for your accountant automatically

slimzaak connects directly to Twinfield via OAuth2, the cloud accounting package many accounting firms use to manage multiple clients' books. Once connected, slimzaak automatically syncs your customers, sales invoices, and expenses with Twinfield, including the receipts slimzaak already captured for you with AI scanning. slimzaak doesn't replace Twinfield — it's the invoicing and bookkeeping tool that prepares everything before it lands with your accountant in Twinfield. If you work with an accountant who uses Twinfield, you invoice and scan in slimzaak, and your accountant finds everything neatly waiting.

WooCommerce integration

Automatic administration for your WooCommerce store

slimzaak connects directly to your WooCommerce store and automatically turns every WordPress order into a VAT-compliant invoice. Credit notes for returns, VAT summaries for your return, and your costs and receipts handled in the same administration. That's how you automate the complete accounting for your WooCommerce store.

Xero integration

Connect Xero with slimzaak

Sell internationally and use Xero for your accounting? slimzaak is your invoicing and admin tool for Dutch VAT-compliant invoices and marketplace orders from bol.com, Amazon, Shopify and WooCommerce. Through a direct OAuth2 connection, everything flows automatically into your Xero accounting, so you never have to retype anything by hand. slimzaak doesn't replace Xero — it feeds Xero with the data from your Dutch sales, while you keep running the rest of your international accounting in Xero exactly as you're used to.

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