
Vendor Payouts Automation
Vendor payouts
Payout schedules, hold periods, approval batches and SEPA or PayPal payout files, on top of core vendor accounting.
from $149
Platforms
CS-CartAdd-ons and themes for CS-Cart and Multi-Vendor
OpenCartExtensions and themes for OpenCart 4 and 3Stores
For CS-Cart & Multi-Vendor · 4.17.2 – 4.21.x
Add-ons and storefront themes for CS-Cart and Multi-Vendor. Hooks only, no core edits, unencoded source code and a tested version range, so they fit your store the first time.


88 add-ons · 27 themesCS-Cart & Multi-Vendor 4.17.2 – 4.21.xCS-Cart
Twelve features with their own page: the problem, the options, how the add-on works and real screenshots.

Vendor Payouts Automation
Payout schedules, hold periods, approval batches and SEPA or PayPal payout files, on top of core vendor accounting.
from $149

Advanced Commission Rules
Commission by vendor, category, product, price or monthly sales on top of your vendor plans, with a simulator.
from $129

Sell by Weight & Length
Decimal quantities with a unit, step, presets and price per kg or metre, with exact stock down to 0.001.
from $129

Make an Offer
A Make an offer button with counter-offers, deadlines and a single-use agreed price; vendors answer their own offers.
from $49

Product Personalizer
Text, photo and choice fields on print areas with a live preview, server-rendered proofs and surcharges.
from $99

EU e-Invoicing: XRechnung, Factur-X/ZUGFeRD & Peppol-ready UBL
XRechnung, Factur-X/ZUGFeRD and Peppol BIS 3.0 e-invoices and credit notes from every order.
from $99

Abandoned Cart Recovery Pro
Up to three reminders, single-use coupons, one-click cart restore and recovered revenue per reminder.
from $69

Advanced Promotions: Buy X Get Y, Tiers, Schedules
Buy X get Y, cheapest item free, tier tables and time windows inside the promotion editor you already use.
from $99

Spreadsheet Bulk Product Editor
Edit the whole catalog in a spreadsheet grid, with mass actions, a preview, a change log and undo.
from $69

B2B Request a Quote (RFQ)
Quote lists, offers with quantity breaks and validity dates, and checkout at the quoted prices.
from $99

SEO Pro Suite: Rich Snippets, Canonical, Hreflang & llms.txt
Richer product markup, FAQs, robots rules, social cards, llms.txt and a page check, on top of the core SEO add-on.
from $99

Wholesale Price Lists
Named price lists with quantity breaks for user groups or single customers, with CSV import and validity dates.
from $99
CS-Cart · Multi-Vendor
88 add-ons and 27 themes in eight categories. Every category page lists the products with prices for the CS-Cart and Multi-Vendor editions.
27 themes for CS-Cart and Multi-Vendor, each with several styles and its own demo store.
Everything runs through CS-Cart hooks and template overrides, so core upgrades and your other add-ons keep working.
Every release is tested on CS-Cart and Multi-Vendor across the supported range.
A perpetual licence with unencoded source code. After the 12 months of updates and support everything keeps working; renewal is optional, at 50%.
A 30-day refund on your first purchase of an add-on, and development hosts such as localhost never count as a licensed domain.
Guides
Guide
How five platforms handle 1.25 kg or 2.5 m, the usual workarounds and what to check before you choose.
Read the guideGuide
XRechnung, ZUGFeRD/Factur-X and Peppol BIS 3.0 explained, with the DE, FR and BE timelines and a store checklist.
Read the guideGuide
Hidden minimums, auto-accept and auto-decline thresholds, deadlines and limits that keep offers profitable.
Read the guideGuide
What changed in 4.21, a safe upgrade checklist and every Kavio Labs product tested up to 4.21.x.
Read the guideFAQ
CS-Cart and Multi-Vendor 4.17.2 up to 4.21.x. Every product page lists the tested range and the editions.
Most of them do, with marketplace features such as vendor panels and per-vendor rules. Some are built for Multi-Vendor only; the edition is shown on every card.
On our store at cs-cart.kaviolabs.com, by card in USD. Selected products are also listed on the CS-Cart Marketplace.
The add-on keeps working, and you keep every version released during your period. Renew at 50% of the current price when you want new versions and support again.
Product pages on the store have the full feature list, screenshots, documentation and the changelog.
Kavio Labs
The same standards, the same support desk and one licence portal on every platform we build for.