This comparison is based on publicly available product information, pricing pages, and verified user reviews as of mid-2026. Prices and feature sets change. Verify with each vendor before purchasing.
There are two distinct categories of multichannel software that often get confused: product feed software and marketplace integration software. They solve different problems.
Product feed software distributes your product catalog to advertising and comparison channels (Google Shopping, Meta Ads, Idealo, Beslist) in the right format for each channel. The data flow is one direction: from your store to the channel. Marketplace integration software creates a two-way API connection with marketplaces like Amazon, bol.com, and Zalando. It sends your product listings to the marketplace and pulls back orders and inventory updates automatically. Without this second layer, you are logging into each marketplace dashboard separately to see orders.
This guide focuses specifically on marketplace integration software: what it does, how the leading platforms compare across the features that matter for European merchants, and which tool fits which type of store.
| Key Takeaways Marketplace integration software is API-based and two-way: it handles both listing your products on marketplaces and importing orders and inventory updates back to your store. Not every tool in this comparison covers European marketplaces equally. bol.com, Zalando, Kaufland, Allegro, and Miinto are well-supported by Koongo and Channel Engine but minimally or not at all by US-centric platforms. Order synchronization is the feature that separates feed tools from true marketplace integration platforms: it imports marketplace orders into your Shopify or WooCommerce order workflow automatically.Inventory synchronization prevents overselling: when a unit sells on one channel, stock is updated across all others within minutes. For SMEs with under 5,000 SKUs and 2-5 marketplace targets, Koongo offers the lowest entry cost that includes all three capabilities: listing, order sync, and inventory sync. |
Comet, the British electricals name, is returning in 2026, this time as an online marketplace for tech and consumer electricals. If you sell electronics or appliances, it’s a channel worth getting ready for now, because sellers who join before launch will have their products live from day one.
Here’s what the new Comet is, why it’s a strong fit for tech and electricals sellers, the challenge of listing electronics on any marketplace, and how Koongo gets your catalogue ready ahead of launch.
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Statistics in this article are sourced from official Alphabet SEC filings, WordStream 2025-2026 Google Ads benchmarks, DemandSage Google Ads statistics, Triple Whale 2025 benchmarks report, OwlClaw Google Shopping benchmarks 2026, and additional verified industry sources. Data reflects the most recent available figures as of mid-2026.
| TL;DR Google Ads generated USD 294.68 billion in advertising revenue in 2025, a 10%+ increase year-on-year, with Q4 2025 alone generating USD 82.3 billion. Google Shopping Ads account for 76% of all retail search ad spend and 85% of all clicks on Google retail campaigns – making them the dominant format for ecommerce advertisers. Average Google Shopping CTR: 0.86%. Average Shopping CPC: USD 0.66 globally (EUR 0.36 in European Shopping campaigns). Average conversion rate: 1.91%.Performance Max now accounts for 34% of total Google Ads spend in 2026, with 93% of retail advertisers running PMax for Shopping campaigns. Google Merchant Center is free to use. Products approved in GMC can appear across Google Search, Shopping tab, Images, Maps, and YouTube. Feed quality is the primary ranking signal. |
Google Shopping is the largest paid channel for ecommerce advertising globally. For every euro or dollar spent on retail search advertising in 2025, approximately 76 cents went to Shopping formats – not text ads. Yet the gap between merchants who treat Google Shopping as a simple feed upload and those who actively optimise it is wider than in almost any other advertising channel.
This article compiles the most current available statistics on Google Shopping – its scale, cost trends, performance benchmarks, and the Google Merchant Center platform that underpins all of it – so you can understand where your campaigns stand relative to the market and what levers drive results.
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To sell on OnBuy, you register as a seller, list your products in the format OnBuy requires, and keep your stock and orders in sync. The quickest way to do all three is to connect your existing store to OnBuy with Koongo, which automates the data work so you can list in an afternoon rather than a month.
But before the how, the why. OnBuy has a few things going for it that set it apart from the marketplaces most sellers start with. Here’s what OnBuy is, why sellers are moving to it, the one real challenge in getting listed, and exactly how Koongo handles that challenge.
This offer is an early-bird deal: pay for one month of your seller subscription by 31 July 2026, and your next 12 months of subscription are free, so you get 13 months of selling for the price of one. Because OnBuy, easyShop, and Comet all run on the same OnCommerce account, that single subscription covers all three marketplaces as they launch. Standard selling fees on your actual sales still apply, so it’s the subscription cost that’s waived, not selling on the platform entirely.
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In 2024, more than 60% of all online product searches in Europe started on a marketplace rather than a search engine. Amazon, bol.com, Zalando, and their peers have become the default product discovery layer for hundreds of millions of shoppers and for merchants, this creates both an opportunity and a strategic challenge.
The opportunity: instant access to an audience that would take years and significant ad spend to build on your own webshop. The challenge: each marketplace operates differently, charges differently, and requires your product data in a different format. Running three or four channels manually adds hours of work every week and introduces errors that cost you visibility, sales, and occasionally your seller account.
This guide covers everything you need to know about marketplace selling in 2026 from what a marketplace is and which ones matter for European merchants, through to how multichannel operations work at scale and what mistakes to avoid in your first 90 days.
