Palo Alto
United States




The infrastructure modules behind modern commerce media: platform, engine and intelligence, plus the modules and capabilities that run on them.
Explore the core platformLaunch a retail media network, connect brands and agencies, automate operations and power discovery, all on one commerce platform.
Explore all solutionsEverything your engineering team needs to build with Topsort: API references, SDKs, integration guides and live platform status.
Topsort powers the auctions, ranking systems, and monetization infrastructure behind modern commerce platforms.
120+
employees globally
40+
countries served
Billions
commerce decisions daily
<5ms
auction latency
Trusted by leading brands and built by talent from top companies and universities
Marketplaces and retailers need dynamic ranking and pricing systems, not static placements and manual sales.
The most powerful monetization systems shouldn't only exist at companies like Amazon. Every commerce platform deserves them.
Modern marketplaces require automated decision systems that optimize in real-time across billions of signals.
The largest marketplaces built powerful internal auction systems that smaller retailers could not access. Topsort was created to bring that infrastructure to every commerce platform.
Topsort starts in Palo Alto to democratize advanced ad monetization technology: the auction systems only a handful of Silicon Valley giants had.

We unveil our core auctions infrastructure and the Campaign API, giving any commerce platform a real-time marketplace for placements.

Raised our Series A and introduced BIDLESS™ autobidding technology, so advertisers win without manual bidding.

Sponsored Brands and Video Ads go live: four ad formats running on one commerce media infrastructure.

Launched Toppie and Toptimize, and expanded beyond onsite into offsite and in-store.

"Commerce platforms deserve the same infrastructure that powers the world's largest marketplaces."
We design infrastructure that scales globally.
Commerce decisions happen in milliseconds.
Modern commerce runs on automated systems.
Every system we build assumes complex commerce environments.
Our products benefit retailers, marketplaces, brands, advertisers, and consumers alike.
Thoughtful decisions that create sustainable growth for our customers and the future of commerce.
Ship early, learn quickly, iterate relentlessly.
Impact matters more than ego. We collaborate across roles, regions, and time zones.
When something matters, we talk it through clearly and openly.
We say what we mean, without hiding behind jargon or politics.
120+ employees across 4 continents.
United States
Chile
Brazil
Germany
Spain
United Kingdom
United States
Australia
United States
Chile
Brazil
Germany
Spain
United Kingdom
United States
Australia
/ Careers · We're hiring
Commerce platforms used to rely on simple search results and manual merchandising. Today they rely on auctions, ranking systems, and machine learning.
The largest marketplaces built these systems internally. Most companies still don't have access to them.
Join us to change that.
View open roles