Buyer’s Guide · Comparison
Lead Gen Agency vs SDR-as-a-Service vs Fractional Sales
Three different categories that look similar from the outside. Which one fits your motion?
By the Launch Leads team · 5 min read · Updated April 2026
Pick between three categories that look similar from the outside: lead gen agency (outsourced outbound team, $4–12K/mo retainer, best for prospecting at scale), SDR-as-a-service (dedicated SDRs acting as your team using your CRM and branding, $7–15K/mo per rep, best when integration matters), or fractional sales (part-time senior leader, $5–15K/mo for 1–2 days/week, best for early-stage or turnaround leadership). The category matters as much as the specific vendor.
You’ve heard pitches from three different categories — “lead gen agency,” “SDR-as-a-service,” and “fractional sales” — and you’re trying to figure out which one you actually need.
The categories overlap. They sometimes do similar work. But the engagement models, accountability structures, and pricing differ enough that picking the wrong category produces a bad fit even when you pick the best vendor in that category.
The thesis: lead gen agencies are best for outbound prospecting at scale. SDR-as-a-service fits when you want dedicated reps acting as your team. Fractional sales fits when you want strategy + leadership not just execution. The category matters as much as the specific vendor.
What we’ve learned across 1,000+ B2B engagements
76,000+
Appointments set
26,000+
Sales closed
$3B+
Revenue sourced
Lead gen agency
What it is: outsourced outbound prospecting team. Agency owns the playbook, ICP research, sequencing, and delivery. You provide the brief; they deliver qualified meetings or sourced opportunities.
Best for: teams that need scale on outbound prospecting without building it in-house. Most B2B mid-market.
Cost: $4,000–$12,000/mo retainer. Sometimes hybrid with PPM upside.
Watch out for: volume-shop agencies that prioritize meeting count over quality. See contract red flags.
SDR-as-a-service
What it is: dedicated SDRs (Sales Development Reps) who act as part of your team. They use your CRM, your tools, your branding. The vendor manages the people but the work product is yours.
Best for: teams that want dedicated capacity without recruiting/onboarding overhead. Often used as a bridge to building in-house SDR teams.
Cost: $7,000–$15,000/mo per dedicated SDR. Pricing per head, not per outcome.
Watch out for: SDR turnover. Vendors who rotate SDRs every 6 months produce ramp-time penalties identical to in-house turnover.
“What we were looking for was a way to get more qualified leads to our outside teams. We had to make a choice between hiring our own inside sales team or looking to an outsourced resource like Launch.”
— Eric Flynn, CEO, Treehouse Interactive
Fractional sales
What it is: a part-time senior sales leader (VP-level, often) who runs your sales motion strategy a few days per week. Not execution; strategy + leadership + process design.
Best for: early-stage companies that need senior sales leadership but can’t yet afford full-time. Or established companies that need turnaround leadership for a defined period.
Cost: $5,000–$15,000/mo for 1–2 days/week of senior leader time.
Watch out for: fractional leaders who don’t actually do the work. The category attracts “thought leaders” who advise instead of execute.
Which one for your motion
Quick decision framework:
- Need outbound volume? → Lead gen agency. Best per-meeting economics for prospecting at scale.
- Need dedicated reps that feel like your team? → SDR-as-a-service. Best when integration with your sales process matters more than per-meeting cost.
- Need leadership + strategy, not execution? → Fractional sales. Best when the issue is the playbook, not the head count.
- Some teams use all three. Fractional VP designs the playbook → SDRaaS executes accounts → lead gen agency handles top-of-funnel volume.
How to use this comparison
The category matters as much as the vendor. Pick the model whose engagement structure fits your actual need; then pick the best vendor inside that category.
For the broader buyer’s framework, see How to Choose a Lead Generation Company.
Frequently asked questions
Can one vendor do all three?
Rarely well. Vendors who claim to be agency + SDRaaS + fractional are usually doing one of them well and labeling the others to expand revenue.
What’s the cost-per-meeting difference?
Lead gen agency: $300–800. SDRaaS: similar but pricing is per-rep not per-meeting. Fractional: doesn’t book meetings directly; designs the system.
Can I switch between categories mid-engagement?
Yes. Common path: start with fractional to build the playbook, then layer in lead gen agency for execution.
Which has the lowest contract commitment?
Lead gen agency typically — month-to-month or 90-day pilots are common. SDRaaS usually requires 6-month minimums to justify dedicated rep onboarding.
Which is best for a brand-new sales motion?
Fractional first to design the playbook, then lead gen agency or SDRaaS for execution. Skipping the playbook step usually produces churn.
Free needs assessment · No commitment
Not sure which model fits your motion?
Get on a call with our team. We’ll walk through your situation and tell you which category — agency, SDRaaS, or fractional — is the right fit.
WHAT YOU GET
- → 30-minute call with a Launch Leads pipeline strategist
- → Walk through your motion and what’s actually needed
- → A look at how Launch Leads structures lead gen for comparable teams
If we’re not the right fit for what you need, we’ll say so on the call.
Launch Leads is a B2B lead generation company that has set 76,000+ appointments and sourced over $3B in client revenue across 1,000+ engagements. We focus on multi-channel outbound, real-person outreach, and pipeline outcomes — not activity metrics.