What is an inbound SDR?
An inbound SDR is a sales development representative who handles the leads a company already has: the web form fills, emails, chats, and calls that come in. The job is to respond fast, qualify each lead, filter out the noise, and book real buyers into meetings with the reps who close.
In plain terms
Marketing generates the demand. Reps close the deals. The inbound SDR runs everything in between: first response, qualifying questions, research on the person and company, a judgment call on fit and intent, then either a booked meeting with the right rep or a polite filter with the reason logged.
The role is the mirror image of outbound sales development. Outbound SDRs create conversations from nothing; inbound SDRs convert the conversations already arriving, against a clock that starts the moment the lead raises a hand.
The complete picture of the role, its economics, its metrics, and what AI changes about it, is in our full inbound SDR guide.
Why it matters
Speed decides outcomes: leads contacted within five minutes were 21 times more likely to qualify than at thirty in the foundational research, yet a Harvard Business Review audit found 23% of companies never responded at all, and a 2024 audit of 1,000 B2B SaaS sites put non-response at 63.5%.
The economics are heavy: roughly $110,000 to $175,000 fully loaded per US rep, average ramp of 3.2 months, and average tenure of 1.4 years (The Bridge Group). And the coverage never fits: leads arrive 168 hours a week; a rep works about 40 of them.
The AI shift
The triage half of the job, answering, qualifying, enriching, scoring, routing, and booking, is now done by AI inbound SDRs in seconds, around the clock, across web form, email, chat, and phone. The judgment half moves up: humans set the qualification policy, handle exceptions, and take the meetings that arrive pre-qualified.
LUPO is that layer: every inbound lead captured, qualified, and booked, with everything synced to HubSpot, Salesforce, or any CRM. How it works, step by step, is on the product page.
Common questions
What is the difference between an inbound SDR and an outbound SDR?
An inbound SDR works leads that come to the company: web form fills, emails, chats, and calls. An outbound SDR creates conversations from nothing through cold outreach. Inbound is a speed and judgment game; outbound is a volume and persistence game. Full comparison: inbound SDR vs outbound SDR.
What is the difference between an SDR and a BDR?
Usage varies by company. Most commonly, SDRs qualify inbound demand and BDRs generate outbound pipeline, though plenty of teams flip the titles or use them interchangeably. Read the job description, not the acronym.
How much does an inbound SDR make?
In the US, about $57,000 median base and roughly $96,000 total pay. In the UK, around £40,000 base. Fully loaded employer cost runs far higher; the itemized math is in what an inbound SDR costs.
See LUPO on your own inbound.
A 20-minute call with the founder. Bring a real lead from last week and watch LUPO qualify it.