Solidus

Solidus is an open-source eCommerce platform for brands that need a store tailored to their own business model rather than a standard template. It addresses the need to launch quickly while keeping the architecture extensible, so teams can customize catalog, checkout, promotions, and fulfillment logic as requirements change.

Core capabilities include a product catalog with dynamic variants, bundles, and personalization quizzes; inventory and fulfillment with split shipments, returns, exchanges, and WMS/3PL integration; a built-in taxation system covering VAT, GST, and US sales tax; a customizable promotions engine; an open checkout supporting one-click flows, upsells, and store credit; and a native subscription engine with subscriber promotions and dunning. Official integrations span payments (Stripe, Braintree, PayPal Commerce Platform, Klarna, Affirm, Afterpay, Bolt), content management (Contentful, DatoCMS, Prismic, AlchemyCMS), marketing (Klaviyo, Drip, Segment, Google Merchant Center, Meta), logistics (EasyPost, ShipStation, Shipwire, Quiet Platforms), taxation (Avalara, TaxCloud), customer service (Kustomer), and fraud detection (Signifyd). An extensible API allows custom integrations.

Solidus targets brands across CPG, subscriptions, marketplaces, fashion, direct-to-consumer, health and beauty, global commerce, automotive, and enterprise use cases. Enterprise brands can use a fully hosted option alongside the open architecture. Pricing and packaging details are not stated on these pages.