AtomStore vs Endora Commerce — which one to pick for B2B

Most comparisons in this series open with the observation that the other platform started life as a retail store and got B2B later. With AtomStore that sentence would simply be untrue. AtomStore has a separate B2B edition with its own price list, its own modules and its own roadmap. The feature list in it is genuinely long: company accounts with sub-accounts and a multi-level organizational structure, individual pricing matrices, cascading discounts, trade credit synchronized with the ERP and automatically blocking orders once the balance is exceeded, multi-level order approval, a full quoting module with negotiation, a sales rep panel, an Elasticsearch-backed search engine, shopping lists, CSV import, multi-warehouse handling and packaging units. On top of that, a dozen-plus ready connectors to Polish ERP systems and two-way integrations with Allegro, eBay and Empik.

This is a strong platform and there is no point pretending otherwise. Since December 2023 AtomStore has been majority-owned by Grupa IAI, the company behind IdoSell, and operates within it as an independent brand. That means capital, an SLA, a standby environment with a two-hour failover and a team that runs the infrastructure for you.

So the difference between these two platforms does not lie in which one “has B2B”. It lies in the delivery model: AtomStore is a service you rent, and Endora Commerce is code you own. That single decision drives the cost structure, the ceiling on extending the platform, and what happens when your requirement falls outside the vendor’s roadmap. Below I break it down across four criteria, and at the end I point to the places where AtomStore is the better choice.

The short version

If you only read three sentences: pick AtomStore when you want a mature, finished B2B product with an SLA and no server of your own, you also sell through marketplaces, and you accept that the bill is recurring and grows with your revenue. Pick Endora when you want the code and the data on your side, your processes reach beyond what can be configured in someone else’s panel, and you count your horizon in years rather than quarters. If you already sell on AtomStore and everything works, migrating without a costed reason is a bad investment. Below you will find the material to cost that reason out.

What each of these platforms actually is

AtomStore

AtomStore is a Polish e-commerce platform in the SaaS Enterprise model, aimed at medium and large sellers, available in B2C, B2B and omnichannel editions. You pay a subscription and the platform sits on the vendor’s side: you have no access to the server, the code or the database. You have an admin panel, a theme, modules and an API.

The B2B edition is a separate product with its own price list, not a toggle inside the retail version. What you get in it:

• Company accounts and sub-accounts: multi-level company structures with role and permission assignment, spending limits for individual units and employees, and multi-level order approval.
• Individual price lists and discounts: pricing matrices per contractor, quantity tiers, cascading discount groups and automatic cart recalculation according to the assigned contract.
• Trade credit: balance control synchronized with the ERP in real time and an automatic order block once the limit is exceeded, without involving the accounting department.
• Quoting and the sales rep panel: the rep picks up an inquiry from the customer’s cart, edits the discount, the margin, the price and the quantities, builds an offer with sections, variants and flexible quantities, and then exports it to PDF or XLS or sends it as a link. The customer accepts the offer with an “Accept and order” button, at which point it turns into an order. Default offer validity is configurable, finished offers become templates, and the whole thing also works from a tablet during a visit at the customer’s site.
• On top of that: one-click re-order, shopping lists, several open carts at once, CSV import, custom fields, configurable order statuses, multi-warehouse handling, packaging units, a delivery cost calculator that picks the carrier by weight and dimensions, and an Elasticsearch-backed search engine that handles typos, synonyms and product codes.

The 2026 roadmap covers a phased refresh of the admin panel using an AGILE approach through the end of the year, a PWA app for field sales reps with route planning, visit reports and an offline catalog, publishing the PWA storefront as a native app in the App Store and Google Play, a native TikTok Shop integration and a Smart Search AI engine.

Endora Commerce

Endora Commerce is a B2B platform written in TypeScript: a Fastify backend with MikroORM and Zod contracts, a server-rendered Next.js storefront, a React admin panel. Data in PostgreSQL, cache and queues in Redis, search in Meilisearch. Over 60 modules come as standard, from the catalog and price lists to KSeF, product feeds and an AI assistant in the panel.

The data model starts from the organization: the buyer is a company, the price comes from a contract, and an order can be the outcome of a negotiation. B2C selling runs on the same installation and the same data model. Registering an individual customer creates a single-person organization behind the scenes, so orders, quote requests, invoices and addresses travel the same path as in B2B. B2C is switched on separately for each sales channel.

The delivery model is the opposite of AtomStore’s: you do not pay a subscription, you get a platform rolled out around your processes, with the code in your Git repository and the data in your database. The first working prototype takes four weeks, and an average rollout lands in the region of 60-80k PLN, excluding integrations with external systems, which are quoted separately.

Performance

Both platforms play in the same league here and there is no point turning this into a battleground. So let us separate two things that tend to blur together in conversation.

The infrastructure itself. AtomStore runs it for you: daily backups, database replication, and on the Enterprise plans a standby environment that brings the service back up within two hours during the day and four at night, plus an SLA open to negotiation. Plans differ on hard parameters: from 15 GB of storage and 150 GB of transfer on START to 800 GB and 10 TB on CLOUD 64. That is real value. Nobody will call you at night.

Endora renders the storefront server-side in Next.js, with Core Web Vitals targets written directly into the platform requirements (LCP under 2.5 s, INP under 200 ms, CLS under 0.1) and search under 200 ms at the 95th percentile. The target scale is hundreds of thousands of SKUs plus hundreds of orders and quote requests per month on a single VPS: a minimum of 4 vCPU and 8 GB RAM, 8 vCPU and 16 GB recommended. The demo runs on a catalog of more than 120k SKUs, and generating a feed for 100,000 products produces a 38 MB file at a peak memory use below 20 MB, because serialization is streamed.

Limits written into the contract. This is the difference that is easy to miss when choosing and comes back a year later. In AtomStore, capacity is sold in packages: a product cap (2,500 on START, 25,000 on PREMIUM, 80,000 on MAX), a monthly page-view cap (100k on START, 500k on PREMIUM, one million on PREMIUM+, uncapped from MAX) and a transfer cap. Exceeding any of them is a surcharge: 129 PLN for another 10,000 SKUs, 85 PLN for another 100,000 views, 49 PLN for another 100 GB of transfer. In Endora the ceiling is set by hardware you are paying for anyway: 120k SKUs on the demo is not a line in a price list, it is a server configuration.

The caveat on the other side: AtomStore has years of work on large Polish deployments behind it and a team that knows that infrastructure. Endora’s numbers are architectural targets confirmed by tests and by the scale of the demo. If your requirement is a guaranteed SLA with contractual penalties and a standby environment ready to switch over, AtomStore has it on the shelf. Endora needs you to arrange it on your side.

Cost of rollout and running

This is the section where the numbers can actually be worked out, because AtomStore publishes its price list. The amounts below come from the official B2B price list effective 1 March 2026 and are net figures.

The subscription

The row that matters most is the GMV cap. The price list says it plainly: the cap is calculated from order value over the trailing twelve months, and once it is exceeded you are automatically moved to the plan matching your current GMV. Formally this is not a commission on sales, because there is no percentage anywhere. In practice, though, the bill is tied to revenue: as you grow, you pay more for the same software, only in steps rather than linearly. Going from PREMIUM+ to MAX after crossing 4M PLN of GMV is 1,700 PLN more per month, and going from MAX to CLOUD 8 after crossing 12M PLN is 4,900 PLN more per month.

Modules billed separately

The second thing you have to add in is the modules. In the B2B price list, key functions are surcharges on the lower plans and only become “included” from a specific tier upwards.

Two rows deserve a sentence of their own. Quoting, the mechanism many companies go looking for a B2B platform for in the first place, costs 1,500 PLN per month on every plan up to and including CLOUD 8, and is only bundled in from CLOUD 16, meaning from a 15,999 PLN monthly subscription. And webhooks, the basic way of notifying external systems about events, are unavailable on START, PREMIUM and PREMIUM+; they appear only from MAX. If you are building an ERP integration on the 1,999 PLN plan, that leaves polling the API, and the API for contractors itself costs another 700 PLN per month.

A worked example

Take a wholesaler selling roughly 10M PLN online per year, integrating with Comarch ERP Optima, wanting quoting and a sales rep panel plus a decent search engine. In AtomStore that GMV puts them on the MAX plan (12M PLN cap).

Over three years that is 291,456 PLN on the AtomStore side against 75-110k PLN on the Endora side (60-80k PLN of rollout plus 5-10k PLN a year for the VPS). Over five years it is 485,760 PLN against 85-130k PLN. Neither figure includes the rollout on the AtomStore side or the integrations on the Endora side, so both numbers are understated by comparable items.

For a smaller company sitting on the PREMIUM plan (GMV up to 2M PLN), with the API for contractors, quoting, the sales rep panel, Optima, pricing rules and search, the bill is 6,446 PLN per month: 77,352 PLN a year and 232,056 PLN over three years. Even at that scale, the first year of subscription is comparable to Endora’s entire rollout.

Fairly, on the other side: the AtomStore bill covers hosting, backups, security, platform updates, support and an SLA. In Endora those things do not disappear: somebody has to do them and that costs money too, though usually noticeably less than the gap in subscriptions. You can take that on yourself, or contract it to us or to a partner firm under an SLA covering both administration and development. And one more thing: 60-80k PLN is a starting point, not a ceiling. Integrations with external systems are quoted separately, and development after launch has its price as well. The difference is that in Endora the budget goes into developing your platform rather than renewing somebody else’s subscription, and it does not grow automatically alongside your revenue.

Ease of extending the platform

This criterion is best tested with a single question: what do you do when your requirement falls outside what the vendor anticipated?

AtomStore is a platform with an open API: REST plus a separate SOAP API for B2B, along with webhooks and XML export for contractors. Technical documentation is available after verification through a form, usually within a day. Plenty of things you configure in the panel: order statuses, custom fields, pricing matrices, sorting algorithms, the delivery calculator. That is enough in most cases.

The boundary sits elsewhere: you integrate with the platform, but you do not extend it from the inside. AtomStore’s public materials describe integrations over the API and dedicated solutions built on the vendor’s side, not a plugin system in which you add a module to the core yourself. That means if you need a mechanism the platform does not have, you have two routes: build it alongside, over the API, or raise it with the vendor and wait for the roadmap. The refreshed admin panel, the field sales app and Smart Search AI are announced for the end of 2026. Those are specific dates, but they are not yours.

In Endora the boundary is your time and budget, because the code sits in your repository. An unusual module you write yourself or with a partner, in ordinary TypeScript, without forking the core and without waiting for anybody’s release.

One thing is worth adding, and I found no equivalent of it in AtomStore: the Endora panel has an AI assistant. You open the command palette and describe in plain language what should happen. The assistant shows the plan of changes and executes it once you confirm, within your permissions and with an entry in the audit log. AtomStore has AI in a different place: a generator for product descriptions and articles, billed in packages of 100 descriptions.

There is a number behind that, because “fast” on its own means nothing: a less complex module takes 1-3 days in Endora, a larger one up to a week. That excludes integrations with an ERP, WMS, CRM, PIM or OMS: those are always heavily bespoke, and writing one takes up to two weeks. Those are always heavily bespoke and can take considerably longer. The difference against a subscription model is not really about the days, though. It is that there is somebody to ask at all: on SaaS a missing feature joins the vendor’s wish list and arrives when they decide, not when you do.

Integrations with external systems

In B2B this is usually the deciding criterion, because the platform is almost never the source of truth. The ERP is, with a CRM, a WMS and increasingly an OMS beside it.

Where AtomStore wins

The number of ready connectors to Polish systems. Comarch ERP Optima and XL, Subiekt (including Nexo), WAPRO Mag, Enova 365, Streamsoft Prestiż and Verto, Symfonia, Kamsoft, Microsoft Dynamics 365, SAP, Baselinker, Infakt, wFirma. If your ERP is on that list, you buy a finished building block and pay 99 to 499 PLN a month for it instead of commissioning code. That is an advantage nobody replicates quickly.

Marketplaces over APIs, not over feeds. Allegro with multi-account support and an active-listing cap set by the plan, Allegro International for Czechia, Slovakia and Hungary, eBay, Empik Marketplace, InPost Buy. This is a genuine two-way integration with a panel for managing listings. It is the area where Endora falls clearly behind.

KSeF works: you generate the token once in KSeF, save it in the store settings and decide whether invoices should go automatically or only after manual approval. On top of that comes a rich logistics and payments layer: IdoPay with on-site BLIK, Apple Pay and Google Pay, AutoPay, tpay, InPostPay, InPost International, DPD, Packeta, Meest.

Where Endora wins

A shorter list of ready integrations, but a stronger contract and no plan thresholds.

The key point is that the list is not closed and does not need to be. Endora’s integration layer is generic. There is no list of “supported ERPs”, there is a documented contract: a partner API, signed webhooks and encrypted provider configurations. Any ERP, CRM, WMS or OMS plugs in as an adapter module, whether that is Comarch, SAP, an in-house system written at the company twenty years ago, or a platform nobody has heard of yet. The adapter registers itself with the platform, gets its own settings and permissions, and the core stays untouched. It is the same path the Stripe, PayU and tpay adapters were built on.

The specifics this layer rests on:

• Comarch ERP Optima and Subiekt GT: adapters as standard, with no monthly surcharge, covering product records, stock, prices and sales documents.
• KSeF in the platform core: invoices and corrections in the FA(3) format sent through a durable queue, the KSeF number on the document, the official receipt available for download and a verification QR code on the PDF.
• A partner API with live OpenAPI: the document is generated from contracts in the code, so your integrator is not working from an outdated PDF and is not waiting for documentation access to be approved.
• An API key pinned to an organization and a channel: the integration sees exactly that company’s prices and limits and can do no more than its own buyer. There is no parameter that bypasses the rules.
• Idempotent orders: a repeated request returns the same order, never a second one. That holds for concurrent repeats as well.
• Webhooks signed with HMAC-SHA-256, up to eight attempts with increasing backoff, a separate view of failed deliveries with manual retry. All of it available from day one, with no plan threshold.
• Bulk quoting: one request prices up to 200 line items for a specific organization, guaranteed to match the cart to the last grosz.
• Credentials encrypted with AES-256-GCM, tested on save, masked on read and redacted in the audit log.

It comes down to two things. First, in AtomStore an integration with a popular ERP is a line in the price list, and in Endora a line in the rollout budget; with an in-house or heavily modified system that advantage disappears, because you are commissioning code either way. Second, Endora’s integration contract understands the concept of an organization: an API key pinned to a company sees its price list, its credit limit and its assortment. A distributor’s ordering portal therefore runs on exactly the same terms as its buyer, without building a separate permissions layer on the integrator’s side.

B2B: where Endora Commerce genuinely stands out

Let me start with what there is no point hiding: AtomStore’s B2B runs genuinely deep. Multi-level company structures with roles and spending limits, multi-level order approval, pricing matrices with cascading discounts, trade credit policed by the ERP, a full quoting module with negotiation and conversion of an offer into an order, a sales rep panel that works on a tablet at the customer’s site, shopping lists, re-order, CSV import, packaging units, multi-warehouse handling, RMA. That is not a list you undercut with a single paragraph, and Endora does not win here on length.

It wins in a few specific places, and those are worth going one level deeper into.

1. Quoting is in the core, not in the price list. AtomStore’s Quoting module does what it should, but it costs 1,500 PLN a month and only becomes “included” from the CLOUD 16 plan, meaning from a 15,999 PLN subscription. In Endora the full negotiation loop is part of the platform: the customer submits a request, the sales rep prices it with a lead time and a validity date, both sides can amend the terms, and an accepted offer turns into an order without re-entering the line items. On top of that there is the none price display mode, which hides every pricing element and routes purchase intent into a quote request. That is the mode for assortment that is not sold from a price list on principle.

2. An organization hierarchy with inherited commercial terms. AtomStore models company structure through accounts and sub-accounts with roles, permissions and spending limits. That is a hierarchy of permissions. In Endora organizations form a tree down which commercial terms flow: order visibility travels downwards, and the price list and credit limit are inherited from the nearest ancestor. A group with a head office, a division and twenty branches does not need twenty parallel pricing configurations. You set the terms at the right level of the tree.

3. A credit limit reserved atomically rather than checked. AtomStore synchronizes the balance with the ERP and blocks the order once the limit is exceeded. That is a correct architecture if the ERP is the source of truth about the balance, but it is a state check. Endora reserves the limit atomically at the moment the order is placed and releases it only once the invoice is paid or the order is cancelled, and once the limit is used up it filters the available payment methods. The difference shows up exactly where it hurts: with two orders placed concurrently by two branches of the same company, and during a temporary ERP outage.

4. A pricing engine as a rule builder, not a set of modules. AtomStore splits this into separate items: Pricing rules (149 PLN/month), Promotional campaigns (499 PLN/month), Flash sales, Sorting algorithms. In Endora there is one engine: group price lists, individual contracts, quantity tiers, time windows and an AST rule builder across channel, group, organization, category and currency, with AND/OR conditions up to five levels deep, with deterministic resolution of overlapping rules. The price seen in the API, in the cart and on the offer comes out of the same place.

5. The sales channel as a first-class dimension, not a surcharge. In AtomStore, Multistore is a plan limit (zero stores on START, one on PREMIUM, two on PREMIUM+, three on MAX, uncapped from CLOUD 16). An own marketplace and omnichannel are modules available only on the Enterprise plans, for an extra 2,499-6,999 PLN and 799-1,599 PLN a month. In Endora the storefront, the marketplace, the distributor portal, PWA and POS are separate channels of one installation, with separate products, prices, promotions, content, settings, analytics and search index for each of them. A distributor portal is not another line on the invoice, it is an entry on the channel list.

6. Code and data on your side. This comes back on four occasions: during a security audit where your team wants to see the code handling contractor data; when the vendor changes the contract terms or the price list; when leaving the vendor, where the difference is between exporting data and moving a repository; and with a requirement that simply does not fit inside somebody else’s platform. Alongside it comes the audit log with before-and-after state, and impersonation with a visible banner and an entry in the log.

Where AtomStore has the advantage within B2B itself: supporting sales reps in the field. The sales rep panel works on a tablet at the customer’s site today and lets you build a cart or a finished offer on the spot. A dedicated PWA app with route planning, visit reports and an offline catalog is announced for the end of 2026. Endora has no equivalent and does not have one as standard. On top of that, AtomStore’s quoting module is more mature in the details: offer templates, versioning, sections, flexible quantities and export to PDF and XLS are features polished by years of use. And finally, multi-level order approval is more developed in AtomStore than the per-organization cart approval Endora offers.

When AtomStore will be the better choice

1. You do not have and do not want a technical back office. Zero servers, zero updates, zero on-call, backups and a standby environment inside the subscription. For a monthly fee you take the entire operational layer off your plate. That is real value, not a saving on paper.

2. You sell through marketplaces. Allegro with multiple accounts, Allegro International, eBay, Empik. Two-way integration with a panel for managing listings is the area where AtomStore is clearly further ahead.

3. Your ERP is on the list of ready connectors. Comarch, Subiekt, Enova, Streamsoft, WAPRO, Symfonia, Dynamics. Buying a connector for 199-499 PLN a month is faster than commissioning an adapter.

4. You have sales reps in the field. The tablet sales rep panel and the announced PWA app with routes and an offline catalog are features Endora does not have today.

5. The procurement requirement reads “SLA and guaranteed support”. Purchasing departments in large organizations often have this written in explicitly. AtomStore gives you an SLA contract, the care of a project manager, testers and architects, and a standby environment with a two-hour failover.

6. Your processes fit the standard and you want to go live fast. Selling from a pricing matrix, cascading discounts, trade credit policed by the ERP, order approval, re-order. If that describes your company, a finished product will be faster and less risky than a rollout. A subscription from 999 PLN a month is a lower barrier to entry than an implementation project, especially when your horizon is a year rather than five.

When Endora Commerce will be the better choice

1. You count cost over three and five years. At the scale in the example, the difference is 291k PLN against 75-110k PLN over three years, and 486k PLN against 85-130k PLN over five. The longer the horizon and the higher the revenue, the bigger the gap, because the AtomStore plan is bound to the GMV cap over the trailing twelve months.

2. The code and the data have to be yours. A security audit, a legal department requirement, the risk of contract terms changing, or the need to leave a vendor without migrating the whole platform. That is a difference no amount of configuration works around.

3. Your processes reach beyond configuration. An unusual order lifecycle, your own commercial rules, a mechanism nobody else has. In SaaS you raise it with the vendor and wait for the roadmap; in Endora you write a module in your own repository.

4. Your customer structure is complex. Capital groups, branches inheriting the price list and credit limit from the nearest ancestor, order visibility flowing down the tree. A hierarchy of commercial terms, not just a hierarchy of permissions.

5. Quoting is the heart of your selling, not an add-on. If most orders go through a negotiation, paying 1,500 PLN a month for a quoting module for five years is 90k PLN for a function that is part of the platform in Endora.

6. You run several channels at once. Storefront, distributor portal, marketplace, mobile app and POS as channels of one installation, with separate assortment, prices and content, and with no Multistore cap in the plan and no separate omnichannel fee.

7. The credit limit is a real risk-control tool. Atomic reservation at order placement, release once the invoice is paid, payment methods filtered once the limit is used up. And all of it regardless of whether the ERP happens to be responding at that moment.

8. Your team works in TypeScript and wants to extend the platform itself. One language from the database to the interface, Zod contracts shared between backend and frontend, an ordinary monorepo in your GitLab.

9. You have a system nobody supports off the shelf. An in-house ERP, an ageing WMS, an OMS assembled from several tools. Endora’s integration layer does not assume a particular product on the other side. You write the adapter once, in your own repository.

What Endora Commerce does not have

This section is here so that the article can be used to make a decision, not just to feel persuaded.

• Two-way marketplace integrations. Allegro, Amazon and eBay are handled with feed templates, not APIs. AtomStore has an advantage here that no argument undercuts.
• An app for field sales reps. There is no equivalent of the tablet sales rep panel, nor of the announced PWA app with routes and an offline catalog.
• Upkeep bundled into a single price. Somebody has to maintain the server, the backups and the updates. AtomStore takes that off you entirely, along with an SLA and a standby environment. You can run that yourself, or contract it to us or to a partner firm under an SLA.
• An extensions marketplace. You will not add a feature in five minutes. Anything unusual is development work.
• A deep market of specialists. Endora is developed with a partner or your own TypeScript team, which has to learn the platform.
• A decade of references at extreme scale. If your requirement is a documented case at the level of the largest Polish deployments, AtomStore has the longer track record.
• Multi-level order approval to the degree AtomStore has it. Endora has per-organization cart approval, with a full submission path and a decision with justification.

A short checklist

Answer these questions for yourself. The answers usually line up on one side.

1. What is your horizon: a year or five years? Cost both options over the same period.
2. What will your GMV be in two years, and which AtomStore plan will you land on then?
3. How many of the functions you need are a separate monthly line in the price list?
4. Do you sell through Allegro, eBay or Empik? If so, is that a key channel or a supplementary one?
5. Do you have reps who work at the customer’s site, or does everything happen remotely?
6. Does your security or legal department require access to the code and the data?
7. Do your processes fit what can be configured in a panel, or do they have steps nobody else has?
8. Do you have somebody to look after a server, or does that have to be somebody else’s problem?

A majority of answers along the lines of “long horizon”, “growing GMV”, “unusual processes”, “we want the code”, “complex customer structure” points to Endora. A majority of “marketplaces are key”, “reps in the field”, “no technical back office”, “we need an SLA”, “standard processes” points to AtomStore.

Summary

This is the closest comparison in the whole series, because both platforms answer the same question and both have B2B in the core rather than as a bolted-on module. AtomStore gives you a mature product with a very broad set of B2B features, ready connectors to Polish ERP systems, two-way marketplace support, an SLA and zero technical overhead. You pay for that with a subscription bound to a GMV cap, separate monthly fees for key modules, and no access to the code. Endora gives you a platform of comparable B2B depth, with quoting, an organization hierarchy and credit limits in the core, for a one-off rollout and with the code in your repository. In exchange you take on running a server, a narrower market of specialists and no marketplace integrations.

The simplest test: cost both options over five years, at the GMV you expect, with the full set of modules you actually need. If AtomStore still comes out ahead after that calculation, because marketplaces and field sales reps weigh more than the cost gap, that is a good decision and worth making deliberately.

The Endora admin panel and storefront run online, so the fastest route is to click through the demo yourself or book a free workshop where we walk through your processes and systems and put a number on the first rollout, integrations included.

And if the conversation points to AtomStore being the better fit, we will say so plainly. A failed rollout is not a good reference for anyone.