In-house SDR or agency: who should prospect for your SaaS
To launch outbound prospecting, you can hire an SDR in-house or delegate to an agency. In-house gives you control and builds up product knowledge, but costs management time and a fixed salary. An agency starts fast and brings proven processes, but knows your product less well and makes you dependent. The choice depends on your maturity and your budget.
By Isidore Mikorey-Nilsson · June 24, 2026
In-house SDR
Control and product knowledge
Best for
SaaS companies that want to build a lasting sales machine in-house.
Strengths
- Deep knowledge of the product and the market
- The know-how stays inside the company
- Full alignment with your strategy
Limitations
- Fixed cost and time spent hiring and training
- Slow ramp-up before becoming profitable
Agency
Fast start, proven processes
Best for
SaaS companies that want to test outbound fast without hiring or building structure.
Strengths
- Operational within a few weeks
- Processes, tools and deliverability already in place
- Flexible: you can stop without severance cost
Limitations
- Limited product knowledge, a less refined pitch
- Dependence, and know-how that does not stay with you
Side-by-side comparison
| Criterion | In-house SDR | Agency |
|---|---|---|
| Time to launch | Slow | Fast |
| Cost | Fixed salary | Flat fee or variable |
| Control | Total | Partial |
| Where the know-how builds up | In-house | At the agency |
| Product knowledge | Strong | Weak |
In-house SDR or agency: the real cost of a meeting
Hiring an SDR costs far more than their salary. In fully loaded cost (salary, commissions, benefits, tools, management, ramp-up), an in-house SDR often runs between $110,000 and $160,000 a year, or 2 to 3 times their base salary, according to SalesHive.
On top of that cost comes time. An SDR takes an average of 3 to 6 months to become fully operational, and turnover for the role reaches about 34% a year according to Martal. So you pay for a long ramp-up for what is often a short tenure.
Per customer, our study on CAC by channel places human outbound among the most expensive channels. An agency does not erase this cost, but it turns it into a variable expense that is operational right away.
What an agency brings you, and what it costs you
An agency is operational within a few weeks: processes, tools, deliverability and scripts are already in place. To test outbound without hiring or building structure, it is the fastest path, and you can stop without severance cost if it does not work out.
The downside: the agency knows your product and your market less well, so its pitch is often less refined, and the know-how does not stay with you. You are renting capacity, not building an internal asset.
The math depends on your stage. As long as your outbound message is unproven, the agency saves you beginner mistakes. Once the channel is validated, bringing it in-house becomes more profitable and builds up know-how. Work out the tipping point with the CAC calculator.
The sequence that limits the risk
The lowest-risk progression is almost always the same: test with an agency, learn what works (targets, hooks, objections), then hire in-house to industrialize a process that is already proven rather than a bet.
Watch out for the opposite trap: hiring an SDR too early, before you have a message that converts. You then pay for a ramp-up of several months only to discover your offer was not ready, a luxury an early-stage founder cannot afford.
Before you even choose, make sure outbound is the right channel: compare inbound or outbound, then decide between providers with freelance or agency for SaaS acquisition and SaaS acquisition agency.
What if you started prospecting yourself?
Before even weighing in-house SDR against agency, an early-stage founder often gains the most from prospecting the very first accounts themselves. Nobody knows the product and the problem better, and those early conversations are worth their weight in gold for sharpening the message.
It is not scalable, but that is not the goal at this stage. You are trying to validate what to say, to whom, and with which angle. Once you have found that script, you can hand it to an agency to test volume, then bring it in-house.
Delegating a prospecting motion whose recipe you do not yet know means paying someone to guess in your place. Find the recipe first, industrialize second.
Verdict
If you have never validated your outbound message, an agency saves you months and spares you beginner mistakes. Once the channel is proven, bringing an SDR in-house becomes more profitable and keeps the know-how with you. The winning sequence is often: test with an agency, learn what works, then hire to industrialize in-house.
Your tailor-made acquisition plan
We read your SaaS and hand you a complete plan: who to target, which channel, what to do.
Frequently asked questions
- What budget do I need for a prospecting agency?
- Expect a monthly flat fee of a few thousand dollars, sometimes topped up with a variable fee per meeting generated.
- When should I bring it in-house?
- Once the channel is proven and the volume justifies a full-time role that costs less than the agency's invoice.
- How much does an in-house SDR really cost?
- In fully loaded cost, often $110,000 to $160,000 a year, or 2 to 3 times their base salary, once you add benefits, tools, management and ramp-up time.
- How long before an SDR becomes profitable?
- Expect 3 to 6 months to ramp up to full competence, while average tenure barely exceeds a year. Which is exactly why it pays to validate the channel before hiring.
Sources
- The True Cost of an SDR (SalesHive, 2024)
- SDR Salary Guide: Real Costs vs Outsourced (Martal, 2025)
- B2B CAC by Channel, 2026 Benchmarks (First Page Sage, 2025)