Topsort

Topsort is a retail media platform that lets marketplaces and retailers sell ads on their own sites, with AI agents for operations and analytics. Sold by quote.

Topsort turns the search results, category pages and product pages of a commerce site into ad inventory that the site's own sellers and brands bid on. Topsort Inc., a Palo Alto company started in 2021, builds and owns it and sells it as one platform with seven named parts. It settles a retailer's build-or-buy question about adtech: serving, auctions, advertiser accounts, billing and measurement arrive as one system. The aim is advertising that sits natively inside the shopping experience. T-Platform is the core, with sponsored listings, banner and video placements, an advertiser self-service portal, prepaid wallets and auction, catalog and reporting APIs. T-Zero is a lightweight ad server, and T-Engine adds real-time auctions, pacing, quality scoring and autobidding toward a target ROAS. T-Brain is Topsort's commerce foundation model, and its first model, Theo, informs search, ranking, recommendations and advertising. Tomi is an AI agent that creates campaigns, analyzes results and carries out approved actions, even on another company's ad server. Data Genie answers business questions as reports and dashboards without SQL, and Toppie DSP is the workspace where brands and agencies plan campaigns. The platform is built for the commerce media teams of marketplaces, retailers, delivery apps and travel platforms. It suits companies with engineers who integrate by API, because the auction, event and catalog calls run on the retailer's own surfaces. The sellers and brands who advertise get their own logins, with full access or analytics-only roles set by the marketplace admin. A typical first job is selling sponsored slots in a marketplace's search results, then adding banner and video campaigns to its home and category pages. Offsite campaigns carry a vendor's budget to Google, Meta, Snapchat and TikTok audiences, created from the same interface or through the API. Analysts read hourly campaign tables in Data Genie or receive them in their own Snowflake account through Secure Data Sharing. Topsort fits a retailer that wants its ad business to run on its own storefront and data, from the first sponsored listing to campaigns the Tomi agent manages.