By Zivko Dodovski, Founder & CEO, DoneMaker · Updated September 2026
A sales development agency finds the people who fit your ideal customer profile, starts conversations with them, qualifies the ones who show interest, and books them onto your calendar. You close; they fill the pipeline. That’s the whole job — and the differences between agencies come down to who does the work, how, and what they count as a result.
What a sales development agency actually does
Most agencies package it differently, but the work is the same five steps.
1. Targeting. Building the list: which industries, which roles, which company sizes, which geographies. Get this wrong and everything downstream is wasted effort.
2. Messaging. Writing what the prospect reads first — connection requests, opening messages, follow-ups. Good messaging sounds like a person; bad messaging sounds like a template with your name pasted in.
3. Outreach. Sending, at volume, every working day. This is where agencies split: some use automation tools to send thousands of identical messages; some have humans sending each one. We’re in the second camp, for reasons covered below.
4. Qualification and follow-up. Reading replies, answering questions, staying in the conversation until a prospect either shows real interest or clearly isn’t a fit. Most of the value is here, and it’s the part automation can’t do.
5. Handoff and reporting. Booking the interested prospect onto your calendar with context, and showing you the numbers every week so you can see what’s working.
An agency that only does steps 1–3 is a lead generation agency. An agency that does 1–5 is a sales development agency. Whether the same team also runs your closing calls is a different question — see the next section.
Lead generation vs sales development vs business development
These three terms get used interchangeably, and they shouldn’t be.
In large companies, business development usually means partnerships, market expansion, and deals. For a founder-led B2B service firm, business development means one thing: getting qualified conversations onto the calendar — targeting, messaging, outreach, follow-up, and the handoff to close. Lead generation is the first step of that. A sales development agency runs the middle of it. DoneMaker runs the whole thing.
| Lead generation agency | Sales development agency | Business development team (DoneMaker) | |
|---|---|---|---|
| What you get | A list of contacts, or inbound leads from ads and content | Qualified prospects, usually as booked meetings | Booked calls with prospects who already asked questions |
| Who does the outreach | Often nobody — leads are generated, not contacted | The agency’s SDRs, often with automation | A dedicated human team on your account: strategist, account manager, outreach specialist |
| Where it stops | At the list | At the meeting | At the handoff — with follow-up still running on everyone who hasn’t booked yet |
| Measured by | Lead volume | Meetings booked | Connection rate, deal opportunities, booked calls, per account, per month |
| Fits when | You have a team that can work a list | You have closers but no top-of-funnel | You’re the closer and you don’t have a team |
The full breakdown of the three agency types, and how to pick, is in Lead generation vs sales development vs business development.
How DoneMaker runs it
We do one thing: manual, human LinkedIn outreach for B2B service businesses. Specifically:
- A dedicated team per account. A strategist sets the targeting and messaging. An account manager is your point of contact and reviews performance with you. An outreach specialist runs your profile every working day. Your outreach specialist runs a small number of accounts, not dozens.
- Every message is sent by a person. No automation tools, no bulk sending, no browser plugins. That keeps your LinkedIn account safe and it keeps the conversations real — prospects can tell when a bot wrote to them, and they don’t answer.
- Targeting through Sales Navigator, messaging written for your buyer. Not a template with your company name swapped in. The sequence leads with something useful to the prospect before it asks for anything.
- Most booked calls come from the first message. The opening message makes a clear, specific value proposition, so most prospects say yes or no right away instead of going quiet. The ones who need more time get it — the specialist stays in every open conversation until it books or closes out.
- You take the call. We hand off the prospect with the full thread, so you’re never walking in cold.
DoneMaker by the numbers
As of September 2026:
- Running manual LinkedIn outreach since 2018
- 58+ active client accounts, US and Canada
- 25–30% average connection rate
- 7–11 deal opportunities per account per month
- 4–5 booked calls per account per month
- Clients: accounting, bookkeeping and CFO firms; digital, marketing and advertising agencies; coaches and consultants; B2B services with relationship-driven sales
A deal opportunity is a prospect who expresses clear interest — asks questions, opens an email exchange, or books a call.
Is a sales development agency right for you?
It fits if you sell a B2B service where the sale happens in a conversation, you’re the person who should be in that conversation, and the thing stopping you from growing is that the conversations aren’t happening. That describes most of the accounting firms, agencies, coaches and consultants we work with — see how it played out for Jones & Lamb, an accounting firm, and J Baker Media, a social media agency.
It doesn’t fit if you sell something transactional that closes from a web page, if nobody on your side can take the calls within a day or two of them being booked, or if what you actually want is a list of names to email. There are cheaper ways to get a list.
If you’re weighing agencies, how to choose a B2B lead generation agency covers what to ask before you sign. If you want to see how the outreach itself is built, the LinkedIn outreach playbook walks through it step by step.
Frequently asked questions
What exactly does a sales development agency do?
It handles the front half of your sales process: finding prospects who match your ideal customer, contacting them, qualifying the ones who show interest, and booking them onto your calendar. The goal is that your time goes to people who are ready to talk, not to prospecting.
How do sales development agencies generate leads?
Depends on the agency. The common channels are cold email, cold calling, LinkedIn, and paid ads, and many agencies mix several with automation on top. DoneMaker uses one channel, LinkedIn, with every message sent manually by a member of your account team. We think a real conversation on the platform where your buyers already are beats a wider net with a bot behind it — the case for that is in manual vs automated LinkedIn outreach.
What’s the difference between a sales development agency and a marketing agency?
A marketing agency builds awareness and demand — brand, content, ads, website. A sales development agency starts one-to-one conversations with specific people and turns them into meetings. Marketing makes people aware you exist; sales development gets them on your calendar.
Want to see what this looks like for your firm? Book a call — 20 minutes, we’ll tell you honestly whether LinkedIn outreach fits your business before anything else.
