A store next to Subiekt
Orders from a WooCommerce or PrestaShop store go to Subiekt, and stock and prices come back to the store.
Subiekt and InsERT software integration with your store, BaseLinker and other systems
We connect Subiekt GT, nexo PRO and 123 with your store, BaseLinker and marketplaces. An order becomes a document in Subiekt, the invoice goes to KSeF from the software, and accounting gets the data without retyping.
- 15 yearsof experience in projects
- since 2018as KamikStudio
- 10+ yearsof work with InsERT Sfera
Case studies: polmais.pl (Subiekt nexo PRO), Agropunkt (Subiekt GT and Optima)
Description and prices as of
Who a Subiekt integration is for
For companies that sell from Subiekt and do not want to retype orders, stock or documents between programs.
Wholesale and B2B
Prices for customer groups, several warehouses and orders from regular customers without retyping into the software.
Accounting office
Documents from Subiekt reach Rewizor or Rachmistrz on an agreed schedule, without manual export.
A company with its own system
Your program, CRM or app exchanges data with Subiekt through Sfera, not through a spreadsheet.
InsERT programs we work with
We choose the connection method for the program and edition you have. You buy licences directly from InsERT or its partner.
Subiekt GT
Sales and warehouse. Sends and receives invoices through KSeF [2]. Integrations use the Sfera extension [1].
Subiekt nexo PRO
The newer InsERT line with KSeF built in. Integrations follow the nexo SDK documentation [3].
Subiekt 123
Cloud edition, receipts through a fiscal printer [4].
Rewizor
Full accounting. Rewizor GT has a Sfera edition [1].
Rachmistrz
Simplified revenue and expense ledger. Rachmistrz GT has no Sfera edition [1], so we transfer data with exchange files.
Gratyfikant and Gestor
Payroll and HR, and CRM. Both GT editions have Sfera [1].
vendero and Sello
Online store and marketplace sales from the InsERT family.
[1] insert.com.pl - Subiekt GT Sfera and Sfera editions of GT programs. [2] insert.com.pl - Subiekt GT ready for KSeF (leaflet of 9 Feb 2026). [3] insert.com.pl - Subiekt nexo PRO, nexo SDK. [4] subiekt123.pl.
How we connect Subiekt with other systems
First we check whether a ready-made connector is enough. We write a custom program only when a ready tool cannot handle your process.
Sfera for Subiekt GT
InsERT extension with access through COM / OLE Automation: all sales and warehouse documents, 10 price levels [1].
Sfera in the nexo PRO line
Programs and integrations for the PRO edition according to the nexo SDK documentation [3].
EPP files
Document exchange in the InsERT format (EDI++), when the program has no Sfera or passing documents is enough.
Ready-made connectors
RT NET, Base Bridge and others. Cheaper to start, with limits we describe before you choose.
| How Base Bridge works | What it means for you |
|---|---|
| Requires Subiekt GT with Sfera | On top of the Subiekt licence you need Sfera, PLN 2,090 net according to the InsERT price list [1]. |
| Runs on Windows with the computer switched on | When the computer is off, orders and stock wait. |
| Stock and prices only from Subiekt to Base | A price change in BaseLinker will not go back to Subiekt. |
| Does not issue invoices in Subiekt | The sales document has to be issued separately or through another route. |
| Order changes after the order document is created do not pass through | Address or item corrections after that are made by hand. |
A ready-made connector is enough when
- you sell from one store and one warehouse
- you set stock and prices only in Subiekt
- you issue invoices in Subiekt by hand
A custom program, when
- you have several warehouses or B2B group prices
- the invoice should be created automatically after payment
- data must flow both ways
- the order changes after it reaches Subiekt
[1] insert.com.pl - Subiekt GT Sfera and Sfera editions of GT programs. [3] insert.com.pl - Subiekt nexo PRO, nexo SDK. [5] base.com help - Base Bridge: connection with Subiekt GT (in Polish).
BaseLinker configuration, rules and label printing are described on the BaseLinker implementation page.
Stay with software that keeps you compliant
Behind Subiekt, Rewizor and Rachmistrz is the InsERT team that adapts the programs to changes in Polish law. A home-made "invoicing app" written from scratch moves that responsibility to you.
Polish VAT Act, Art. 111
Receipts only from a cash register
Sales to private persons must be recorded on a cash register [6]. Software cash registers are allowed only in selected industries, e.g. passenger transport, hotels and catering [7]. An app that "prints receipts" without a register does not meet this requirement.
Polish VAT Act, Art. 106e and KSeF
Numbered invoices in KSeF
An invoice must have a sequential number that identifies it uniquely [8]. KSeF is mandatory from 1 Feb 2026 for companies with sales above PLN 200 million in 2024 and from 1 Apr 2026 for everyone else [9]. Subiekt GT and nexo PRO send and receive invoices through KSeF [2].
Rewizor and Rachmistrz
Bookkeeping in accounting software
We transfer documents from Subiekt to Rewizor or Rachmistrz. Bookkeeping and settlements stay in software built for it, instead of a second "accounting" next to the store.
Until 31 Dec 2026 an invoice may be issued outside KSeF if such invoices do not exceed PLN 10,000 gross in a month [10]. We design integrations for KSeF from the start.
[2] insert.com.pl - Subiekt GT ready for KSeF (leaflet of 9 Feb 2026). [6] Art. 111(1) of the Polish VAT Act (consolidated text, Journal of Laws 2026 item 1263). [7] Regulation of the Minister of Finance on cash registers in the form of software (consolidated text, Journal of Laws 2023 item 2268). [8] Art. 106e(1)(2) of the Polish VAT Act. [9] ksef.podatki.gov.pl - From when invoices must be issued in KSeF. [10] Art. 145m of the Polish VAT Act.
Sfera programs: Subiekt tailored to your company
Sfera is the InsERT extension for writing your own programs that work on Subiekt and Rewizor data [1]. You stay with proven software, and it does what your process needs.
Your own documents
Documents created automatically from orders, with your fields and print templates.
Automatic goods receipts and issues
Warehouse receipts and issues are created automatically after delivery or shipment.
Reports and summaries
Sales, margin and stock in a layout Subiekt does not offer as standard.
Transfer to accounting
Documents go to Rewizor or Rachmistrz. Rachmistrz GT has no Sfera edition [1], so we choose the exchange route for your edition.
10+ years
We have worked with Sfera for more than 10 years, including Sfera integrations for EGKAL. Every program comes with technical documentation, a manual and a change history. The client buys the Sfera licence, e.g. Subiekt GT Sfera PLN 2,090 net according to the InsERT price list [1].
[1] insert.com.pl - Subiekt GT Sfera and Sfera editions of GT programs.
Why companies hand us their Subiekt integrations
An integration touches invoices, the warehouse and accounting. We run it as a project with a contract and acceptance, not as a quick script.
- 15 years
- of experience in IT projects
- since 2018
- under the KamikStudio brand
- 10+ years
- of work with InsERT Sfera
Technical documentation
Description of the connection, field mapping and configuration. Another team can take over without us.
Manual and change history
A manual for your team and a change log for every version.
Contract and acceptance
Scope, deadlines and acceptance report in writing. 12-month warranty.
References and a call with a client
We put you in touch with the owner of a company we work for. Ask them directly what working with us is like.
We know the law, not only code
Sending offers to e-mail addresses from company databases requires the recipient's prior consent in Poland, also in B2B [11]. We say so before we start.
We did not arrive with the AI trend
We have built integrations for years. We use AI where it saves time, not instead of knowing the software.
[11] Art. 398(1) of the Polish Electronic Communications Law of 12 July 2024 (in force since 10 Nov 2024).
Projects with Subiekt in the background
Stores that sell with Subiekt, while we make sure the connection works after every update.
polmais.pl · PrestaShop 9 and Subiekt nexo PRO
PrestaShop 9 store connected with Subiekt nexo PRO
Orders and stock flow between the store and Subiekt nexo PRO through the RT NET connector. We maintain the store and keep the integration working after updates.
- Platform
- PrestaShop 9
- Software
- Subiekt nexo PRO
- Connection
- RT NET connector
- Scope
- store and integration maintenance
Agropunkt · PrestaShop 9, Subiekt GT and Optima
Synchronization kept during the move to PrestaShop 9
When moving the store to PrestaShop 9 we kept the OpSync synchronization with Subiekt GT and Comarch Optima. For Optima we wrote our own KS Integrator module.
- Platform
- PrestaShop 9
- Software
- Subiekt GT, Comarch Optima
- Connection
- OpSync and KS Integrator module
- Scope
- migration and maintenance
Subiekt integration pricing
Net prices. We give the exact amount after a free call and a review of your software, before you decide.
Ready-made connector
Store to Subiekt in one direction
from€520 net
- choosing and configuring the connector
- orders from the store to Subiekt
- test on real orders
- short manual
Excludes connector and InsERT licences
Full integration
Store or BaseLinker and Subiekt both ways
from€1,300 net
- orders, stock and prices
- sales documents
- team training
- manual and documentation
Excludes InsERT licences
Integration with automations
Several warehouses, B2B, your own rules
from€2,080 net
- everything in the full integration
- several warehouses
- B2B group prices
- rules for your process
Excludes InsERT licences
Sfera program
Your own module for Subiekt, Rewizor or Rachmistrz (Sfera editions)
from€2,340 net
- process analysis
- Sfera program
- technical documentation
- manual and change history
Excludes the Sfera licence
Support and hours outside the package
- Support and updates after InsERT version changesfrom €78 / month
- Hours outside the package€52/h, €47/h in an hours package
The client buys InsERT licences (e.g. Subiekt GT Sfera PLN 2,090 net according to the vendor price list [1]) and the connector licence. Rachmistrz GT has no Sfera edition, so we transfer data to it with EPP files. The code and documentation are yours.
How a Subiekt integration works
Scope, deadlines and acceptance are agreed in writing before we start.
- Call and reviewWe check the software edition, Sfera, the store and how documents flow today.
- Choosing the routeA ready-made connector or a custom program. We tell you plainly what is enough.
- Implementation and testsWe connect on a copy of the data and test on real orders.
- Training and acceptanceYour team gets a manual, you get an acceptance report and documentation.
- SupportWe keep the integration working after InsERT updates and store changes.
Questions about Subiekt integration
Does a Subiekt integration require Sfera?
It depends on the route. Base Bridge and custom programs for Subiekt GT require Sfera, while some ready-made connectors and EPP file exchange work without it. After the review we tell you whether a Sfera licence is needed.
Will Subiekt GT send invoices to KSeF?
Yes. Subiekt GT and Subiekt nexo PRO send and receive invoices through KSeF. The integration makes sure the document from the order is created in Subiekt and is sent to KSeF from the software.
Will BaseLinker issue an invoice in Subiekt?
Not through Base Bridge. The connector transfers orders, and stock and prices flow only from Subiekt to BaseLinker. If the invoice should be created automatically, you need a Sfera program or another connector.
Does the computer with Subiekt GT have to stay on?
With Subiekt GT and Base Bridge, yes, because the connector runs on Windows next to the software. Subiekt 123 runs in the cloud. We choose the route to match how your office works.
Can I drop Subiekt and issue invoices from the store?
We advise against it. Behind Subiekt is the InsERT team that keeps the software in line with the rules on invoices, cash registers and KSeF. A store can issue a document, but responsibility for compliance then moves to you.
Will you connect Subiekt with Rewizor or Rachmistrz?
Yes. We transfer documents from Subiekt to accounting through Sfera or exchange files, depending on the software edition. Rachmistrz GT has no Sfera edition, so for it we use file exchange.
Who buys the InsERT and connector licences?
You do, directly from the vendor or a partner. For example, Subiekt GT Sfera costs PLN 2,090 net according to the InsERT price list. In the quote we list which licences you need.
What happens after a Subiekt update?
With support from €78 net per month we check the integration after new InsERT versions and fix it before it stops orders.
See also: BaseLinker implementation, Comarch Optima integration, system integrations.
We will check how to connect your Subiekt
Tell us which Subiekt edition you use, whether you have Sfera and where your orders come from. After the call we give you the route and the price. We reply within 24 h.
- Free call and review
- Price before you decide
- You own the code and documentation