BDR vs SDR: What's the Difference & Which Do You Need to Hire?

A BDR and an SDR are not the same job — and hiring the wrong one first will stall your pipeline for a quarter. The distinction comes down to one variable: the direction of the pipeline motion. SDRs work inbound leads that marketing generates. BDRs build outbound pipeline from scratch. Get this backwards and you'll put an outbound hunter in a role that needs a qualifier, or vice versa — and watch your conversion rates slide.

What does an SDR (Sales Development Rep) actually do?

An SDR's job is to convert marketing-qualified leads (MQLs) into sales-qualified opportunities. When someone downloads a white paper, requests a demo, or signs up for a free trial, the SDR picks up that lead, qualifies it against your ICP criteria, and either books a discovery call for an Account Executive or disqualifies the lead so the AE's calendar doesn't fill with dead-end meetings.

The core SDR workflow is reactive. They don't build the list — marketing builds the list. The SDR's skill is speed-to-response, qualification accuracy, and the ability to run a structured follow-up cadence without the lead going cold. Salesloft's research on pipeline roles consistently shows that SDRs who respond to inbound leads within five minutes are 21x more likely to qualify them than those who wait 30 minutes.

Key SDR metrics: MQL-to-SQL conversion rate, time-to-first-contact, number of meetings booked, and show rate. These are process metrics, not creation metrics — they measure how well the SDR works with existing demand, not how much new demand they create.

Typical SDR responsibilities

• Calling and emailing inbound leads within defined SLA windows
• Running qualification conversations using a framework (BANT, MEDDIC, etc.)
• Booking and confirming discovery calls for AEs
• Managing the inbound lead queue in the CRM
• Logging activity and maintaining CRM hygiene
• Routing disqualified leads back to marketing nurture sequences

What does a BDR (Business Development Rep) actually do?

A BDR's job is to create pipeline where none existed. They prospect cold accounts, research them, write personalised outreach, and work multi-touch sequences across email, phone, and LinkedIn until they either book a meeting or exhaust the account. Nothing comes to them from marketing — they build every list, write every sequence, and manufacture every opportunity from scratch.

This is a fundamentally different cognitive task than SDR work. BDRs need to identify which accounts are worth pursuing, why they're worth pursuing right now, and what angle will get a response from a cold prospect who has never heard of your company. That requires research skills, pattern recognition, and resilience — the rejection rate on outbound is structurally higher than on inbound.

"The BDRs who consistently hit quota aren't the ones sending the most emails. They're the ones who spend 20 minutes on an account before they send one email — and that research shows in every line of the message."

— VP of Sales, 80-person B2B SaaS company

The sharpest BDRs don't prospect randomly. They identify accounts where there's a specific buying signal — a recent funding round, a new hire in a relevant role, or a company actively using a competitor product. That last signal is particularly high-value: a company already paying a competitor has confirmed budget, a validated problem, and a known switching window.

This is the use case Stealery was built for — you type in a competitor's name and get a list of every company using that product, filterable by size, location, and hiring signals. For a BDR, that replaces hours of manual research with a targeted list of accounts that are already in the market for exactly what you sell.

Typical BDR responsibilities

• Building target account lists from scratch using ICP criteria
• Researching accounts for buying signals and personalisation hooks
• Writing and sending personalised cold email sequences
• Cold calling into target accounts
• LinkedIn outreach and social selling
• Booking discovery calls for AEs from cold-sourced accounts
• Reporting on outbound metrics: sequence open rates, reply rates, meetings booked

What is the key difference between a BDR and an SDR?

The key difference between a BDR and an SDR is pipeline direction: SDRs process inbound demand that already exists; BDRs create outbound demand that doesn't yet exist. Everything else — comp structure, skill profile, success metrics — flows from this one distinction.

It's worth noting that many companies — particularly before Series A — use the terms interchangeably. If a job posting says "SDR" but the role description says "you'll be building outbound lists and running cold sequences," that's a BDR role by function, whatever they call it.

How does BDR and SDR compensation differ?

BDRs are typically paid more than SDRs because outbound pipeline creation carries more execution risk and requires a broader skill set. According to Bureau of Labor Statistics occupational data and industry compensation surveys, entry-level outbound BDR OTEs in the US run $55,000–$80,000, while SDR OTEs typically fall in the $45,000–$65,000 range depending on market and company stage.

The variable component also differs structurally. SDR variable pay is usually tied to meetings booked and SQL volume — predictable, process-driven targets. BDR variable is often tied to pipeline created or influenced, which is harder to control and more volatile quarter to quarter. That volatility justifies a higher ceiling.

Senior BDRs or "strategic BDRs" targeting enterprise accounts can command OTEs of $90,000–$120,000 at well-funded SaaS companies, particularly when they're working complex, multi-threaded outbound into accounts with 1,000+ employees.

Which should you hire first — a BDR or an SDR?

The answer depends entirely on where your pipeline constraint is. Hire based on the bottleneck, not on what sounds more impressive to put on a job board.

Hire an SDR first if:

• Your inbound lead volume is growing but conversion is low
• AEs are spending too much time on their own lead qualification
• Marketing is generating 50+ MQLs per month and leads are going cold
• You have strong brand awareness or content that's pulling people to you

Hire a BDR first if:

• Inbound volume is low or nonexistent (common pre-Series A)
• You're entering a new market or vertical where you're unknown
• You need to hit a pipeline number and marketing can't deliver MQLs fast enough
• Your ICP is narrow and specific — you can define the target account list clearly

Most early-stage B2B SaaS companies should hire a BDR first. Inbound takes time to build — SEO, content, and brand compound over 12–18 months. Outbound can create pipeline in week three if the BDR is strong and the list is right. Don't let a process dependency on marketing delay your first revenue conversations.

Should you have both BDRs and SDRs at the same company?

Yes — once you're at a scale where both inbound and outbound are meaningful volume. The typical inflection point is 20–50 AEs, or when inbound leads represent more than 40% of total pipeline. Below that threshold, one generalist covering both motions is usually more efficient than two specialists with underutilised time.

Companies that run both functions well keep them structurally separate. BDRs and SDRs have different managers, different metrics, different tools, and different cadences. Blending them into a single team creates ambiguity about which motion to prioritise when capacity is constrained — and capacity is always constrained.

The most productive configuration we see in B2B SaaS roles at scale: BDRs report to the VP of Sales or a dedicated Outbound Manager; SDRs report to the VP of Marketing or a dedicated Inbound Manager. This alignment ensures each function is optimised for its actual job, not a hybrid compromise.