Sales development / outsourced SDR services / 3 November 2026
Outsourced SDR services: what you are actually buying
Outsourced sales development hands the SDR function - creating qualified sales conversations - to an external specialist. A real engagement covers the whole chain: targeting and list building, sending infrastructure, messaging, daily execution, reply qualification and meeting booking. Every close stays with your team. Outsourced SDR services and SDR agencies sell the same work. ReplyLead runs it over cold email and LinkedIn, and your team takes the sales conversations. Test any meeting promise against the volume behind it: a Google Workspace mailbox carries 10 to 12 cold emails a day, and ReplyLead's median campaign got replies of every kind from 2.12% of the people it contacted.
The one distinction that decides outcomes: are you buying seats - rep hours under your brand - or a system that produces meetings and is accountable for them? The two are priced, measured and experienced completely differently, and most disappointment in this category is a seats purchase that expected system results.
What an SDR agency's meeting promise needs
An agency promises 40 meetings a month from 10 Google Workspace mailboxes.
40 meetings a month from 10 Google Workspace mailboxes means 1 in every 51 people contacted books a meeting, even at 12 emails a mailbox every day of the month. At ReplyLead's median campaign rate of 2.12%, those people would send about 43 replies of every kind, automatic replies included, so 9 in 10 of them would have to become meetings.
Share of people contacted
- Must book for the promise: 2.0% to 3.2%
- Replied in the middle half of ReplyLead's 81 campaigns: 1.38% to 2.97%
- Median campaign: 2.12%
- 9 in 10 campaigns under 3.79%; the highest, 8.0%
- Emails a month
- 2,200 to 3,60010 Google Workspace mailboxes at 10 a day on 22 weekdays, to 12 a day on all 30 days
- People contacted
- about 1,243 to 2,0341.77 emails each, across ReplyLead's campaign book
- Replies at the median
- about 26 to 43every kind, automatic replies included, at ReplyLead's median campaign rate of 2.12%
- Meetings promised
- 401 in 51 to 1 in 31 people contacted (2.0% to 3.2%)
What sales development is - and is not
Sales development is the top of the funnel as a discipline: identifying the right companies and people, opening conversations at scale, qualifying the interest that comes back, and converting it into held meetings for the people who close. It is not inside sales (which carries deals - the boundary is drawn precisely on inside sales outsourcing) and it is not marketing (which builds demand rather than conversations). Outsourcing it works better than outsourcing almost any other sales function for one structural reason: sales development is mostly process and infrastructure, and specialists run process and infrastructure with more discipline than teams for whom it is a side duty. The rest of the model landscape is mapped on sales outsourcing.
The system you should be buying
Whether the vendor leads with reps or with technology, meetings come from the same six jobs, and an engagement is only as strong as its weakest one:
- Targeting and list building - who gets contacted, verified live against the standard on list building.
- Sending infrastructure - dedicated domains and warmed mailboxes, because outreach that lands in spam is activity without existence; the architecture is on cold email infrastructure.
- Messaging - short, specific, testable copy under the rules on cold email copywriting.
- Execution - disciplined daily volume inside per-mailbox limits, with a cadence that stops when a human answers.
- Reply qualification - a person reading every response and separating intent from noise.
- Booking - held meetings, defined in writing, on your closers' calendars.
Ask a prospective provider to walk this list line by line. Sales development representatives without the system underneath are commentary; the system without disciplined people leaks meetings at the qualification step. You are buying both or you are buying neither.
Who does each job in a ReplyLead programme
The six jobs above, split the way ReplyLead's how it works page splits them: ReplyLead owns the machine that produces qualified conversations, and you own the conversations. Your team takes over at the booked meeting.
| Job | Who | What it covers |
|---|---|---|
| Targeting and list building | ReplyLead | Campaign strategy; data, scraping and enrichment |
| Sending infrastructure | ReplyLead | Dedicated domains; private mailbox infrastructure; authentication and deliverability; warmup |
| Messaging | ReplyLead | Copywriting |
| Execution | ReplyLead | Automation and testing |
| Reply qualification | ReplyLead | Reply management; qualification |
| Booking | ReplyLead | Meeting booking, on your calendar |
| The sales conversation | Your team | Sales calls, discovery, proposals, closing and collecting payment |
| Partner | None named | ReplyLead names no partner for any of this work |
Seats versus system: the distinction that prices everything
The seats model - classic outsourced SDR - rents you named reps at a monthly rate. You get brand control and direct management; you also inherit ramp time, turnover risk and the utilisation problem, and the vendor gets paid whether meetings happen or not. The system model - done-for-you outbound, ReplyLead's lane - sells the output: the machine is the vendor's problem, the meetings are the product, and pricing can attach to results. Neither is universally right: seats fit companies that want outbound capability built under their own roof and are staffed to manage it; the system fits companies that want pipeline without becoming outbound operators. What is never right is paying seat prices while assuming system accountability - read the contract for which one you are actually signing.
The economics vendors skip
Sales development output is bounded by infrastructure physics before talent enters the picture. A warmed Google Workspace mailbox safely carries 10 to 12 cold sends a day; mailboxes need a two to two and a half week warmup before that; and reply rates against a verified list cluster around our published median of 2.12% of contacted leads. Chain those together and any promised meeting volume implies a specific infrastructure and list size - which means you can audit a proposal with arithmetic alone. A vendor promising 40 meetings a month from a 10-mailbox programme needs at least 1 in every 51 people contacted to book a meeting, which is 9 in 10 of the replies ReplyLead's median campaign would get from them, automatic replies included; make them show the denominators, then compute cost per held meeting rather than cost per month with the SDR cost calculator.
New sending domains add a wait of their own. ReplyLead sends no campaign from a domain before it is 30 days past its registration date and its mailboxes have warmed for at least 14 days, so a programme on new domains starts no sooner than 30 days after they are registered.
Three situations, and what fits each
You need meetings and have no one to run outbound
Fits: a system
Ask the vendor to put in writing the mailboxes, the emails a mailbox a day and the people contacted a month behind its meeting number, and what it counts as a meeting. This is where ReplyLead fits: it runs the six jobs above, and your team takes the calls.
You want SDRs under your own brand, managed by your sales leader
Fits: seats
You get named reps and direct control, and you take on the ramp time, the turnover and the management. ReplyLead does not place reps on your team; the seat-model vendors are compared on outsourced SDR companies.
You already have a proposal with a meeting number in it
Fits: the check above
Put its numbers into the check before you sign. If the promise needs more meetings than the replies that volume usually brings, ask how the vendor gets there, and get the meeting definition, the replacement policy and the owner of the domains in writing.
Evaluating providers: the short version
The full evidence standard lives on lead generation services and applies here unchanged: rates with denominators and distributions, operational specifics answered in numbers, meeting definitions and replacement policy in writing, incentive geometry that shares a bad month. Two additions specific to sales development: ask who owns the infrastructure when you leave - domains and data walking away with the vendor is a rebuild you will pay for twice - and ask for reply-to-meeting conversion, because a vendor who books everything that breathes is optimising the number you pay on, not the pipeline your closers work. For comparing the seats-model vendor field, the criteria are on outsourced SDR companies.
Five numbers to get in writing
- Mailboxes, and on which provider: Google Workspace or Microsoft 365.
- Emails a mailbox a day. ReplyLead keeps to 10 to 12 on Google Workspace and 1 to 2 on Microsoft 365.
- People contacted a month, after follow-ups.
- The reply rate, with its denominator: per email sent or per person contacted, and whether automatic replies count.
- The share of replies that becomes a held meeting, and what counts as one.
Where ReplyLead sits
We run sales development as a system, email-first: the six jobs above, operated end to end, with qualified meetings delivered and a commercial structure that inverts the seat model - a published-by-tier technology fee for the sending stack, and most of our compensation as a share of the revenue you close. The measured results across 429,763 sends are public, both denominators stated. For right-fit companies the evidence comes before the commitment: the pilot runs a first campaign with build and management at our cost, you carrying only the technology fee.
- Price
- A monthly technology fee for the sending infrastructure, from $2,023 across seven tiers set by send volume, plus an agreed share of the revenue that closes from meetings ReplyLead books. No per-meeting fee. See ReplyLead pricing.
- When nothing closes
- No revenue share is owed, and the fee remains.
- Pilot
- ReplyLead builds and runs the first campaign at its cost; you carry the technology fee. See the pilot.
- Start
- No sooner than 30 days after new sending domains are registered, with mailboxes warmed for at least 14 days.
- Volume
- 10 to 12 emails a Google Workspace mailbox a day and 1 to 2 a Microsoft 365 mailbox; more volume means more mailboxes.
- A client record
- Campaigner, an email marketing software company: 20 positive leads in a one-month sample ReplyLead reports. The workbook's labels are interested replies and requests for information, it does not name the month, and a positive lead is not a held meeting. See the Campaigner record.
Two neighbouring engagement shapes are covered on their own pages: sales as a service, the subscription form of the same system, and outsourced sales management, for teams that already employ the reps and need only the operating layer.
Compare providers. The providers and prices for this model are compared in sales outsourcing companies and among the outsourced SDR companies.
How the check on this page works
The check turns a meeting promise into the share of people contacted who must book. It starts from the emails the mailboxes can send in a month: 10 to 12 a day for each Google Workspace mailbox and 1 to 2 for each Microsoft 365 mailbox, ReplyLead's own limits from its about page, counted over 22 weekdays at the low end and all 30 days of a month at the high end.
Emails become people at 1.77 emails per person contacted, the ratio across ReplyLead's whole campaign book: 429,763 emails to 242,669 contacted leads in the extraction dated 12 August 2026. The meetings promised, divided by the people contacted, is the share that must book. The verdict uses the high end, the most emails and so the most people, which is the reading most favourable to the promise.
That share is set against replies, the step before a meeting. Among ReplyLead's 81 campaigns with at least 500 contacted leads, the share of contacted leads who replied at all was 1.38% at the 25th percentile, 2.12% at the median, 2.97% at the 75th, 3.79% at the 90th and 8.0% in the highest campaign, automatic replies included, from the cold email benchmarks.
A promise that needs more meetings than those replies is one to question. The check does not estimate meetings for any vendor, and ReplyLead did not test any vendor's service.
Common questions
What is outsourced sales development?
Contracting a specialist to create qualified sales conversations - list, infrastructure, outreach, qualification and booking - while your own team runs every close. It is the top-of-funnel slice of sales outsourcing, and the slice that outsources best.
Do outsourced sales development teams actually work?
The system model works measurably when list, infrastructure and messaging each clear the bar - our own programmes' distribution is published with methodology. The seats model works when you can manage reps you did not hire. Both fail where the buyer's arithmetic - deal size against programme cost - never worked to begin with.
What is the difference between outsourced sales development and inside sales outsourcing?
Sales development opens; inside sales advances and closes. The empty-calendar problem is sales development; the slow-follow-up problem is inside sales.
How much does outsourced sales development cost?
Seats price per rep per month regardless of output; systems price on volume tiers, per-meeting units or revenue share. Whatever the shape, divide by held meetings - cost per meeting is the only number that compares across models. ReplyLead's own price is a monthly technology fee from $2,023 plus an agreed share of the revenue that closes, with no per-meeting fee; see ReplyLead pricing.
How fast can an outsourced sales development programme start?
Weeks, honestly: infrastructure warmup takes two to two and a half weeks before campaigns carry volume. Faster promises mean pre-warmed infrastructure standing by - worth verifying - or a skipped step you will pay for in deliverability. ReplyLead also waits until each new sending domain is 30 days past its registration date, so a programme on new domains starts no sooner than 30 days after they are registered.
What do outsourced SDR services include?
The same six jobs as outsourced sales development: targeting and list building, sending infrastructure, messaging, daily execution, reply qualification and meeting booking. At ReplyLead that is eleven published jobs, from campaign strategy to meeting booking, and your team keeps the sales calls, discovery, proposals, closing and collecting payment.
What is an SDR agency?
A company that runs sales development for other businesses: it finds the prospects, sends the outreach, handles the replies and books meetings for the client's closers. Some sell named reps by the month, the seats model; others sell the output of a system they run. ReplyLead is the second kind, over cold email and LinkedIn.
How do I check an SDR agency's meeting promise?
Ask for the mailboxes, the emails a mailbox a day and the people contacted a month behind the number, then divide the meetings by the people. At 12 emails a Google Workspace mailbox every day of the month, 40 meetings a month from 10 mailboxes means 1 in every 51 people contacted books a meeting, which is 9 in 10 of the replies ReplyLead's median campaign would get from them, automatic replies included.
Is ReplyLead an outsourced SDR service?
Yes, of the system kind: ReplyLead runs cold email and LinkedIn outreach for B2B companies and books qualified meetings on your calendar, and it does not place named reps on your team. The price is a monthly technology fee from $2,023 plus an agreed share of the revenue that closes from meetings it books, with no per-meeting fee; in a period where nothing closes, the fee remains.
Sales development, run as a system with its pay on the outcome
ReplyLead is the system model: list, infrastructure, copy, sending and reply handling run end to end, qualified meetings booked for you - with most of our pay a share of the revenue you close.
The technology fee runs from $2,023 a month by send volume, plus an agreed share of the revenue that closes from meetings ReplyLead books. There is no per-meeting fee. In a period where nothing closes, no revenue share is owed and the fee remains.
Book a conversation with ReplyLead.
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When this page does not apply
It covers outbound sales development over cold email and LinkedIn for B2B companies: creating qualified conversations for a team that closes. Inbound lead handling, paid ads, account management and closing sit outside ReplyLead's service.
A reply, a booked meeting, a held meeting, an accepted opportunity and closed revenue are different stages, and each is smaller than the one before. The check compares meetings with replies, so it can show that a promise is unlikely at a given volume, never that a promise will hold. ReplyLead's figures are one operator's campaign book (81 campaigns with at least 500 contacted leads, 12 August 2026), not an industry sample, and the 2.12% median includes automatic replies; it is not a meeting rate.
A vendor that sends more than 12 emails a Google Workspace mailbox a day reaches more people than the check counts; ReplyLead keeps to 10 to 12 by design. Prices and terms can change after 3 November 2026; your agreement decides.
Sources and check dates
- ReplyLead cold email benchmarks. Supports: 429,763 emails, 242,669 contacted leads and 6,249 contacts who replied in the extraction dated 12 August 2026; 1.77 emails per contacted lead across the whole book; among the 81 campaigns with at least 500 contacted leads, replies per contacted lead of 1.38% at the 25th percentile, 2.12% at the median, 2.97% at the 75th, 3.79% at the 90th and 8.0% in the highest campaign, automatic replies included. Read 3 November 2026.
- About ReplyLead. Supports: 10 to 12 emails a day per Google Workspace mailbox and 1 to 2 per Microsoft 365 mailbox. Read 3 November 2026.
- Domain age checker. Supports: a sending domain at least 30 days past its registration date, with mailboxes warmed for at least 14 days, before a campaign. Read 3 November 2026.
- How it works. Supports: the eleven jobs ReplyLead handles, from campaign strategy to meeting booking; the revenue conversation your team handles; a fee charged whether or not a deal closes. Read 3 November 2026.
- Pricing. Supports: from $2,023 a month across seven tiers set by send volume, plus an agreed share of the revenue that closes from meetings ReplyLead books; no per-meeting fee; in a period where nothing closes, no revenue share is owed and the fee remains. Read 3 November 2026.
- The pilot. Supports: the first campaign built and run at ReplyLead's cost, with the technology fee. Read 3 November 2026.
- Case studies: Campaigner. Supports: 20 positive leads in a one-month sample ReplyLead reports; labels include interested replies and requests for information; the workbook does not identify the exact month; a positive lead does not establish attendance. Read 3 November 2026.