Rodok
Abderrazzak AbouyaalaSDR vs BDR: a sales development representative (SDR) typically qualifies inbound leads, people who already showed interest. A business development representative (BDR) typically prospects outbound, reaching people who haven't heard of you. Both book meetings for account executives. Many companies use the two titles interchangeably, so the job description matters more than the title.
If you're a founder or a sales leader at a small team, the real question isn't which title to use. It's whether you need two roles, one, or a rep who does both. This guide explains the difference, compares the roles side by side, and shows how a team of 2 to 10 can split the work.
What is an SDR?
An SDR (sales development representative) is an entry-level sales role focused on the start of the sales process. On the common definition, SDRs handle inbound demand: they follow up on form fills and demo requests, check each lead against the ideal customer profile, book a meeting and hand the lead to an account executive (AE) (ZoomInfo).
"SDR sales" is the search term people use for this whole area. An SDR doesn't close deals. They qualify, and a good one makes the AE's calendar full of conversations worth having.
What is a BDR?
A BDR (business development representative) is the outbound version. They research target accounts, reach out across phone, email and LinkedIn, and open first conversations that can turn into pipeline (ZoomInfo). The work starts with a cold list, not an inbound request.
Some companies flip the definitions, and others use "BDR" for partnership or account-based work. Always read the job description.
SDR vs BDR: the difference at a glance
| SDR | BDR | |
|---|---|---|
| Main direction | Inbound: responds to people who raised a hand | Outbound: starts conversations with people who haven't |
| Starting point | A form fill, demo request or trial sign-up | A target account list or a signal |
| Daily work | Respond fast, qualify, book the meeting, hand off | Research, write, send, follow up, call |
| Typical metrics | Speed to respond, qualification rate, meetings booked, handoff quality | Accounts touched, conversations started, opportunities created, pipeline value |
| Hardest part | Speed and judgment on who is worth the AE's time | Rejection and the volume it takes to get replies |
| Where it leads | Both commonly move to account executive | Same |
The metrics and career path in the table follow ZoomInfo's description of the roles, which also notes that the two are entry-level, parallel roles with similar pay (ZoomInfo). We don't quote salaries here: pay varies widely by company, city and whether the role has variable pay, and we couldn't find one reliable public figure for either title.
Which one does your team need?
It depends on where your leads come from.
- Lots of inbound leads, little outbound. You need SDR work. If leads wait hours for a reply, that is money lost.
- Few inbound leads, a defined market to go after. You need BDR work. Without outbound, there's no pipeline.
- Both, in small amounts. You need one person doing both, and that is the most common situation for a team under 10.
One honest caveat: the split is a size question more than a job-title question. Two specialized roles make sense when each has enough volume to keep a person busy. Before that, they are just two half-empty jobs.
How a small team should split the work
Founder or 1 to 3 sellers
Don't hire either. Founders and the first reps should do their own prospecting, because that's how you learn which message and signal work. Pick a handful of signals (what are buying signals) and contact every match yourself for a month.
4 to 10 people
Hire one development rep who owns both inbound follow-up and a small outbound list. Give them a clear rule: inbound leads get a reply the same day, and the rest of the time goes to outbound on a fixed list of signals. Reps who do both learn faster, and you avoid a fight over who "owns" a lead.
10 and up
Split the work when inbound volume justifies a dedicated SDR. The BDRs then work outbound by segment or by region, and everyone's metrics are clear. This is also when territory rules and lead routing start to matter.
What about AI SDRs?
Software now claims to do a lot of the first-touch work. It can help with research and drafts, but it adds risk when it sends unreviewed messages at scale. See AI SDRs for small teams for what they do well and badly.
Tools each role uses
| Need | SDR (inbound) | BDR (outbound) |
|---|---|---|
| Lead capture and routing | CRM with web forms, round-robin routing | Less important |
| Finding who to contact | Enrichment on the inbound lead | Contact data, LinkedIn search, buying signals |
| Outreach | Email and calendar booking links | Sequences, phone, LinkedIn |
| Notes and next steps | CRM | CRM |
| Examples | HubSpot, Salesforce, Apollo (enrichment) | Apollo, Outreach, Salesloft, LinkedIn Sales Navigator, Rodok |
For BDR work, the weak point is rarely the sending tool. It's knowing whom to contact today and what to say. A signal gives you both: a new VP of Sales who started last week, a company hiring its first SDRs, a founder's post about outbound not working. See signal-based selling and the sales sequences guide.
How to measure each role
Keep metrics few and tied to what the role controls.
For SDR work:
- Speed to first response on inbound leads.
- Qualified meetings held (not just booked).
- Handoff quality: does the AE agree the lead was worth their time?
For BDR work:
- Conversations started: real replies, not sends.
- Opportunities created that an AE accepts.
- Pipeline value from outbound, over a quarter, not a week.
Avoid measuring activity alone (emails sent, dials made). It rewards volume, and volume is how teams end up with bad lists and worse messages.
Career path
Both roles are often a first sales job, and both commonly lead to account executive (ZoomInfo). Some people also move into sales operations, marketing or customer success. If you hire for the role, tell candidates what the next step is and how long it usually takes, or the best people leave.
Frequently asked questions
What is the difference between an SDR and a BDR?
In the common definition, an SDR qualifies inbound leads and a BDR prospects outbound. Both book meetings for account executives. Many companies mix the titles, so look at what the person does each day.
What is an SDR in sales?
An SDR, or sales development representative, is an entry-level role that qualifies leads and books meetings for account executives. SDRs usually work leads that came to the company, such as demo requests, and check whether each one fits the ideal customer profile.
Is a BDR higher than an SDR?
Not usually. They are parallel roles at the same level, and both commonly lead to account executive. Some companies treat BDR as more senior because outbound is harder, but that is a company choice, not a rule.
Should a small team hire an SDR or a BDR?
Probably neither at first. Founders and early reps should prospect themselves to learn what works. After that, one development rep who handles both inbound follow-up and a small outbound list is usually enough until volume justifies a split.
What tools do SDRs and BDRs use?
A CRM, an email and sequencing tool, a source of contacts, and a way to find reasons to reach out. Common examples are Apollo, Outreach, Salesloft, LinkedIn Sales Navigator and Rodok. Inbound-heavy SDR work leans on the CRM and routing. Outbound-heavy BDR work leans on data, signals and sequences.
Can AI replace SDRs and BDRs?
It can take over parts of the work, like research, drafting and follow-ups. It doesn't replace judgment about whom to contact and what to say, and unreviewed automated outreach can damage your domain and your brand. Most small teams do best with AI helping a person, not replacing one.
