Selleris

About Selleris

Selleris is a GTM engineering firm for B2B SaaS and tech-enabled companies. We work with teams whose growth target has outgrown the way revenue actually runs: fragmented account data, buying signals that go nowhere, anonymous website demand, inconsistent follow-up, disconnected sales and marketing, and reporting nobody fully trusts. We engineer that into one revenue system inside HubSpot. That includes account data and scoring, buying signals, visitor identification, visibility in AI answers, outbound activation, AI agents, lifecycle automation, and revenue reporting. Everything is built in your environment and stays yours. Your HubSpot. Your data. Your playbooks. Your licenses. Custom agents run in your own Azure tenant when native HubSpot is not enough. We call this the Glass Box standard: published pricing, visible work, zero software markup, documented systems, and no dependency on us after handover. Our flagship engagement is the Selleris Revenue Loop, a six-month GTM engineering program. It starts with a free diagnostic that turns your growth target into pipeline math. When the data supports the model, the SOW includes a specific day-90 qualified-pipeline floor. If we miss it, Loop Operations are free until we hit it. 42 engineers and architects. Engineering in Warsaw. Selleris LLC in New York. HubSpot Solutions Partner. Microsoft partner. We build the revenue system. You own it from day one.