Glossary · Updated August 27, 2026

SDR (Sales Development Representative)

The salesperson who works inbound leads and books qualified meetings for closers, rather than closing deals themselves.

Also known as: sales development representative · sales development rep · inbound SDR

What is SDR (Sales Development Representative)?

A Sales Development Representative (SDR) works the front of the funnel: qualifying incoming interest, holding a first conversation and booking a meeting for an Account Executive who closes. SDRs are measured on meetings booked and pipeline created, not revenue. The role exists because prospecting and closing need different temperaments and hours, and a closer who prospects closes less.

Christos Papadimitriou, theagency47 · Updated August 27, 2026

SDR versus BDR

The two titles are used interchangeably often enough that the distinction has blurred, but where companies do separate them the split is by direction of travel:

  • SDR — inbound. Works leads that already raised a hand: demo requests, content downloads, trial sign-ups. The prospect knows who you are.
  • BDR — outbound. Generates interest that did not exist yet: cold email, cold calls, targeted research. The prospect has never heard of you.

Inbound is generally the easier seat and the more predictable one, which is why SDR is more often the entry-level title and BDR the harder-to-fill one.

What the role actually costs

The salary is the smallest part of it. A realistic European loaded cost includes recruitment, tooling (data, sequencing, dialler, CRM seat), management time, and a ramp period of three to five months during which output is a fraction of target. Set against an average tenure of roughly eighteen months, a meaningful share of every SDR’s employment is spent either ramping or leaving.

That arithmetic — not any claim about AI being cleverer than a person — is what makes the function an obvious automation target.

What automates cleanly and what does not

Research, list building, qualification scoring, first-draft personalisation and CRM hygiene are mechanical and consume most of an SDR’s day. Those automate well.

Handling a sceptical prospect, reading hesitation in a voice, and knowing when a “not now” is real are not mechanical, and the honest position is that they do not automate cleanly yet.

The compliance point most tooling ignores

An SDR working European markets is subject to per-country rules that most sales tooling treats as one rule. Unsolicited B2B email requires prior consent in Germany, Austria, Italy, Spain, Poland, Greece, Denmark, Czechia and the Netherlands. In Belgium, Finland and Portugal it turns on whether the address names a person. See the country-by-country breakdown for the full map — this is the part that gets outsourced teams and their clients into trouble.

FAQ

Can an AI replace an SDR?

It can replace most of the work rather than the person: research, qualification, drafting, follow-up sequencing and CRM updates. What it does not replace is judgement on a live call with a reluctant buyer. The realistic framing is one experienced salesperson supported by a system doing the work of a small team, not an empty desk.

What is a reasonable meetings target for an SDR?

It varies enormously by deal size and market, but eight to fifteen qualified meetings a month is a common band for European B2B with mid-sized deal values. Targets far above that usually indicate that “qualified” is doing very little work in the definition.

Is an outsourced SDR team cheaper?

Cheaper per month, often, and faster to start. But you rent the capability rather than acquiring it: the data, the messaging that worked and the compliance record leave when the contract does. We compare the three routes here.

Related terms

AI Agent

A software system that takes a goal, plans steps, calls tools, and acts autonomously to produce an output, without step-by-step human prompting.

AI Workforce

A coordinated team of specialized AI agents (not a single tool) deployed across organizational tiers to handle defined work alongside human employees.

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