Erli Integration: Marketplace API, Zero Commission & Modern Allegro Alternative

About Erli: Founders, Investors and Market Position

Foundation and History (2018 – Today)

Erli was launched in 2018 in Warsaw by co-founders Adam Pyzowski, Krzysztof Brzózka and Sebastian Kogut with a simple thesis: the Polish e-commerce market was dominated by a single incumbent (Allegro) charging double-digit commissions, and a new-generation, transparent, commission-free alternative was overdue. The team built a mobile-first marketplace from scratch on a modern technology stack — REST API, OAuth 2.0, event-driven architecture — and went live with a "marketplace bez prowizji" (commission-free marketplace) positioning that resonated immediately with Polish SMB sellers.

Between 2020 and 2024, Erli raised successive rounds led by Movens VC, with follow-on participation from Bitspiration Booster and growth capital from MCI Capital, one of Poland's largest tech investors. By 2024, the marketplace had crossed 4 million active customers, onboarded over 18,000 Polish 3P sellers and processed roughly €500M in GMV — establishing itself as the credible alternative to Allegro and the de-facto Polish counterpart to challengers like OnBuy (UK) or Kaufland (DE).

Erli Ownership and Investors (2026)

• Adam Pyzowski, Krzysztof Brzózka, Sebastian Kogut — Founding team, executive leadership
• Movens VC — Lead venture investor (seed + Series A)
• Bitspiration Booster — Polish early-stage VC, follow-on rounds
• MCI Capital — Growth equity investor
• Erli Sp. z o.o. — Operating entity, HQ Warsaw

Position in Polish E-Commerce

Polish e-commerce is projected to reach €40B+ in 2026, with Allegro holding ~50% share. Erli is the fastest-growing challenger, positioned as the modern, fee-transparent alternative for SMB sellers who refuse to pay 6–15% commission plus mandatory subscriptions. Its core differentiation — 0% standard commission, mobile-first UX, REST/OAuth 2.0 API, 3–5 day onboarding — is attracting exactly the cohort that built marketplaces like OnBuy in the UK and Bol.com in the Netherlands into multi-billion-euro businesses.

Erli Growth Trajectory (2024–2026)

Erli has been the fastest-scaling Polish marketplace in the last 36 months. Its Gross Merchandise Value (GMV) and active customer base have compounded at roughly 60–80% year-on-year, driven by the 0% commission proposition and an aggressive mobile-app strategy that ships weekly.

Year	GMV (EUR)	Orders	Active Customers	3P Sellers
2021	~€60M	1.5M	0.6M	3K
2023	~€220M	6M	2.2M	10K
2024	~€500M	14M	4M+	18K+
2026 (projected)	~€800M	22M	5.5M	26K

Customer acquisition is reinforced by Erli's mobile app (top-10 shopping app in Poland on iOS and Android), aggressive performance-marketing spend funded by VC capital, and a unique seller proposition: zero standard commission. Joining Erli today is structurally similar to listing on Trendyol in 2017 or OnBuy in 2020 — early-mover sellers compound the algorithmic advantage.

How to Open an Erli Store (2026 Rules)

1. Legal and Tax Requirements

To sell on Erli you must operate a registered business in Poland or the EU. Sole traders (jednoosobowa działalność gospodarcza), spółka z o.o. (sp. z o.o.) and S.A. are all eligible. From February 2026, KSeF (Krajowy System e-Faktur) e-invoicing is mandatory for all B2B transactions in Poland.

• NIP (tax identification number)
• REGON (business register number)
• KRS (commercial register, for sp. z o.o. and S.A.)
• VAT registration — VAT-UE for cross-border EU sales
• Polish bank account (IBAN) on the KAS white list
• KSeF integration via certified provider (Comarch, Symfonia, iFirma) or Zunapro built-in
• JPK_VAT monthly SAF-T filing capability
• BDO registration (for sellers shipping packaging or electronics)
• RODO/GDPR compliance with UODO (Polish DPA)

2. Erli Seller Application

Apply at erli.pl/sprzedawaj. Erli reviews applications within 3–5 business days — by far the fastest onboarding among Polish marketplaces (Allegro takes 2–3 weeks, Amazon.pl 1–2 weeks). Once approved you receive a Seller ID, an OAuth 2.0 client_id and client_secret, and access to the merchant dashboard plus the Erli Marketplace API documentation at developers.erli.pl.

📥 Official Erli Seller Registration erli.pl/sprzedawaj — free registration, 3–5 business days approval →

3. Listing and Content Rules

Erli enforces clean, structured listings to maintain its modern shopping UX:

• Title: 60–140 characters, brand + product + key spec (e.g. "Xiaomi Robot Vacuum X10+ 4000Pa LiDAR")
• Images: white background, minimum 1000×1000px, up to 12 photos, no watermarks or promotional text
• Description: HTML supported, minimum 250 characters, structured bullet points encouraged
• Category mapping: Erli taxonomy ID + required attributes (brand, model, EAN, dimensions)
• EAN/GTIN barcode: strongly recommended — boosts catalog match and dedupe quality
• Quality score: listings below 70 are hidden from search results until enriched

Erli Commission Model: 0% Standard + Optional CPC & Erli Plus

This is Erli's defining differentiator: zero standard sales commission. Where Allegro charges 6–15% per category and Amazon.pl 8–15%, Erli takes 0% from your gross merchandise value on the free standard plan. Revenue comes from two optional, fully transparent levers — CPC promoted ads and the Erli Plus subscription — which sellers choose to opt into when they want incremental visibility.

Net profit formula on Erli: Sale price − Optional CPC spend − Optional Erli Plus (99 PLN/mo amortised) − VAT (23%/8%/5%) − Shipping cost − COGS = Net profit. Because the standard commission is 0%, Erli sellers structurally enjoy 6–15 percentage points more margin than the same SKU on Allegro — which is why Erli is the recommended starter marketplace for new Polish e-commerce operators.

Erli Marketplace API — Technical Details

The Erli Marketplace API is a modern REST/JSON interface secured with OAuth 2.0 client_credentials. It lets sellers programmatically manage products, inventory, prices, orders, shipments, returns and CPC campaigns. Base URL: https://api.erli.pl/marketplace/. Full reference at developers.erli.pl.

API Authentication

Erli API uses OAuth 2.0 client_credentials grant. Exchange your client_id and client_secret at the /oauth/token endpoint for a bearer token valid for 60 minutes. Send the token in the Authorization: Bearer {access_token} header on every request. Zunapro refreshes tokens automatically before expiry, so your sync never drops.

Core Endpoint Categories

• Products API — Create, update, deactivate listings; category mapping; quality-score lookup
• Inventory API — Stock and price sync; bulk endpoint up to 200 SKUs per request
• Orders API — List orders, update status, generate pack slips, mark as shipped
• Shipments API — Create labels for InPost, DPD Polska, GLS Polska, Poczta Polska, Orlen Paczka; sync tracking numbers
• Returns API — Process 14-day withdrawal and 2-year rękojmia claims
• Ads API — Create CPC campaigns, set bids, pull ROAS reports
• Webhooks — Real-time push notifications for order, stock and return events

Rate Limits and Error Handling

Erli API enforces a sensible 20 requests per second per seller, with bulk endpoints designed for high-volume operations. Excess traffic returns 429 Too Many Requests. Common error codes: 400 (invalid payload), 401 (token expired or invalid), 404 (category or EAN not found), 422 (business validation failed), 500 (Erli platform error — retry with backoff). The Zunapro Erli adapter implements exponential backoff, retry budgets, dead-letter queues and full structured logging so a noisy hour at Erli never corrupts your local catalog.

Erli Plus: Premium Subscription for Aggressive Sellers

Erli Plus is the optional 99 PLN/month subscription for sellers who want to compound their growth. It is not required to sell on Erli — the standard 0% plan remains free — but Erli Plus unlocks the highest-converting placements on the platform and is the typical step-up for sellers crossing 500+ orders per month.

What Erli Plus Includes

• Homepage and category-page placement — premium visibility on the most-trafficked surfaces
• Priority CPC ad slots — preferred auction position at the same bid as standard sellers
• Advanced analytics dashboards — cohort retention, repeat-rate, basket composition, attribution
• Dedicated account manager — direct human contact for onboarding, escalations and campaign reviews
• Early access to new features — beta access to new Erli surfaces and tooling
• Cancellable monthly — no annual commitment, no exit fees

Operating thumb-rule: if you spend more than 300 PLN/month on CPC ads, Erli Plus almost always pays for itself through priority slots and lower effective CPC. Zunapro tracks the breakeven in your panel and recommends activation when the math turns positive.

Erli Fulfillment Model — 3PL Only, You Stay in Control

Unlike Amazon FBA or Allegro One Box, Erli operates a 3PL-only fulfillment model: there is no Erli-owned warehouse, so sellers fulfil from their own stock or via a third-party logistics provider. This is a deliberate design choice — it keeps Erli's cost base low (and therefore commissions at 0%), and it preserves seller control over packaging, branding and unboxing.

Recommended 3PL Partners in Poland

• Linker Logistics — Modern API-first 3PL with InPost integration
• Omnipack — Multi-channel fulfillment with native marketplace connectors
• OEX e-Business — Enterprise-grade Polish 3PL with same-day cut-offs
• FIEGE, Arvato — International 3PLs with Polish operations

The Zunapro panel integrates with all major Polish 3PLs through standard WMS APIs (WMS XML, WMS JSON, EDI 940/945) so your Erli orders are dispatched to the warehouse the moment they are paid.

Erli Shipping Integration — InPost, DPD, GLS, Poczta, Orlen

Erli buyers expect parcel-locker delivery: InPost Paczkomat is the default and is selected by roughly 70% of Polish e-commerce orders. Erli's shipping module supports five carriers natively:

• InPost — Paczkomat parcel lockers (default), Kurier48, weekend delivery
• DPD Polska — Next-day courier, Pickup Points network
• GLS Polska — Courier, ParcelShop pickup, EU cross-border
• Poczta Polska — National post, economy and registered, rural reach
• Orlen Paczka — Fast-growing gas-station pickup network

The Zunapro multi-carrier module auto-selects the optimal carrier per order based on weight, dimensions, destination city and buyer-selected delivery method, prints the label, and pushes the tracking number back to Erli within seconds.

Erli Returns and Customer Service Workflow

Polish consumer law grants buyers 14 days of unconditional withdrawal (zero-questions return) plus 2 years of rękojmia (statutory warranty) on every B2C purchase. Return rates on Erli average 8–12% overall — lower than fashion-heavy marketplaces but still operationally significant.

Standard Erli Returns Flow:

1. Buyer opens a return request from their Erli account within 14 days of delivery
2. Buyer ships the item back via InPost or DPD (label provided through Erli where eligible)
3. Seller receives the return at their warehouse and inspects within 1–3 business days
4. Seller approves or rejects (with photographic evidence) in the Erli panel
5. Refund is released to the buyer; Zunapro auto-generates the corrective KSeF invoice

The Zunapro returns module automates every step: panel notifications, corrective KSeF invoices, automatic refund-status updates and a dedicated SLA timer so you never drift past the 14-day statutory window.

Erli KSeF E-Invoicing and Polish Tax Compliance

Selling on Erli requires full alignment with Polish tax and reporting obligations. From February 2026, KSeF (Krajowy System e-Faktur) becomes mandatory for B2B; B2C invoices must still meet JPK_VAT structured-file requirements. Manual invoicing at scale is no longer realistic past 100 orders per day.

Zunapro KSeF + JPK_VAT module:

• Automatic structured XML invoice generation the moment an Erli order is paid
• Direct submission to KSeF via the KAS-certified gateway
• Integration with Comarch, Symfonia, iFirma, Fakturownia and other accounting tools
• Automatic corrective invoice on every refund or partial return
• Monthly JPK_VAT and JPK_FA SAF-T file generation
• PDF + email + SMS delivery of the invoice to the buyer post-purchase
• BDO and packaging-fee reporting hooks for sellers above the threshold

Erli Seller Rating, SLAs and Cancellation Penalties

Erli scores every seller on a 1.0–5.0 rating based on order fulfillment quality, communication speed and buyer reviews. The rating directly impacts search ranking and Buy Box eligibility. The largest negative drivers are:

• Cancellation rate — out-of-stock cancellations are the #1 penalty; >2% triggers a warning, >5% risks listing suspension
• Late dispatch — orders not shipped within the promised handling window
• Return rate above category baseline — Erli benchmarks per category
• Buyer review score — must stay above 4.5/5
• Message response time — buyer messages must be answered within 24h

The Zunapro real-time stock sync reduces cancellation risk by ~90%: the moment a SKU sells on your store, on Allegro, on Amazon.pl or on Erli, every other channel is updated within 3–5 seconds — overselling effectively goes to zero.

Erli Promoted Ads, Promotions and Smart Pricing

Erli Ad Surfaces

• Sponsored Listings (CPC) — top-of-search and category placements, bid-per-click
• Erli Plus Premium Slots — homepage and category hero placements, priority auction
• Category Banners — display campaigns for brand awareness
• Promotion Codes — seller-funded discount codes integrated with the Erli checkout

Smart Repricing on Erli

Because Erli is the price-transparent marketplace in Poland, Buy Box competition is sharp on shared catalog items. Zunapro's repricer monitors competitor prices on every Erli listing, adjusts your price within your guardrails in seconds, and never crosses your minimum-margin floor — the same engine works simultaneously on Allegro, Amazon.pl and Kaufland.

Erli Integration with Zunapro — Setup in 4 Steps (10 Minutes)

1. Enter Erli Seller Credentials — In the Zunapro panel, go to Marketplace → Erli and paste your Seller ID, OAuth client_id and client_secret from the Erli merchant dashboard.
2. Connect Your Storefront — Prebuilt connectors for Shopify, WooCommerce, Magento, PrestaShop, BaseLinker and custom REST APIs. Paste the store URL and access key.
3. Category Mapping Wizard — Drag-and-drop your store categories onto the Erli taxonomy. The AI assistant suggests the right Erli category for 95%+ of SKUs automatically.
4. Initial Sync — Products, inventory, prices, orders and shipments — all start synchronising automatically. Within 10 minutes your Erli storefront is fully managed from the Zunapro panel.

Frequently Asked Questions about Erli Integration