You need more sales. You know cold email works. Now you're stuck deciding: hire an SDR to run cold email in-house, or outsource it to a cold email agency.
This isn't a theoretical question. It costs real money either way, and the decision shapes your entire sales operation for the next 12-24 months. Let me break down what actually works, the real numbers, and when each option makes sense.
The SDR Path: What You're Actually Signing Up For
Hiring an SDR sounds straightforward - you get someone dedicated to your business, full-time focus, and direct control over the process. That's true. What's also true is that you're not just hiring a person. You're building a sales operation.
Here's what the first 90 days actually looks like:
- Weeks 1-2: Infrastructure setup. Email accounts, domain warmup, lemlist or Apollo setup, list building, CRM integration. You or someone on your team is doing this, even if the SDR is executing.
- Weeks 3-4: Your SDR is sending 20-30 emails per day while you're still tweaking templates and figuring out targeting. Reply rates are 0-2% because copy isn't dialed in.
- Weeks 5-8: You're rewriting subject lines, testing different pain points, building out sequences. The SDR is executing, but you're doing the strategy work.
- Weeks 9-12: If you've hired well and your copy is solid, you might hit 4-6% reply rates. Now you can scale to 50-80 emails per day.
The hidden cost here is your time, not just salary. At month three, you're probably spending 5-10 hours per week on campaign management, copy refinement, and troubleshooting. That's real.
SDR Costs: The Full Picture
Most agencies pay SDRs $35K-$50K base salary for someone who will actually move the needle. Add payroll taxes, software (lemlist, Apollo, CRM), and email infrastructure, and you're at $60K-$75K annually before they ever send their first campaign.
If they hit 4-6% reply rates and convert 15-20% of meetings to clients, and your average client is worth $10K, that math works. But if they hit 2-3% reply rates because copy isn't landing, you're losing money fast.
Time to profitability: 4-6 months if you execute well. 9-12 months if hiring, training, or copy takes longer.
The Cold Email Agency Path: What Changes
A cold email agency handles infrastructure, targeting, copy, campaign setup, and reply management. You don't hire anyone. You don't build anything. You just hand off your client avatar and start getting meetings.
The tradeoff: you're not building the asset in-house. You don't control the day-to-day execution. If something breaks, you're calling your agency, not fixing it yourself.
Cost-wise, you're typically paying 20-30% of revenue generated, or a flat monthly fee ($3K-$8K depending on volume and service level). If the agency books you 10 meetings per month at $10K average client value, you're paying $20K-$30K monthly in fees. The math only works if you close 2-3 of those meetings.
Time to profitability: 6-8 weeks if the agency knows how to target your market. They skip the setup phase because they've already built the infrastructure.
Here's Where They Actually Differ (The Real Comparison)
Setup Speed
SDR: 6-8 weeks to first solid campaign running.
Agency: 2-3 weeks to first campaign, usually with results visible in week 4-5.
Copy Performance
An experienced cold email agency has tested 1000+ subject lines, opening hooks, and pain point angles across industries. They know what typically gets 5-8% reply rates in your vertical.
A new SDR doesn't. They start at 1-2% reply rates and climb from there - if you're feeding them good strategy.
Real example: Most agencies cold email to accountants with a pain point angle around