Hiring an SDR vs using an AI SDR: how to decide
Hiring an SDR and deploying an AI SDR solve the same pipeline problem but with completely different cost, ramp, and risk profiles. Here's how to decide which is right for where your company is today.
Both a human SDR and an AI SDR solve the same problem: not enough pipeline and nothing running outbound consistently. The decision between them isn't about which is better in the abstract — it's about which fits your stage, your budget, and the current state of your sales motion.
When does hiring a human SDR make more sense?
Your ACV is high enough to justify the relationship investment. Enterprise deals with $50K+ ACV often require phone calls, live objection handling, and multi-threaded account development. You have a proven, documented playbook — a human SDR executes a playbook, they shouldn't discover one. You have management bandwidth to coach, run deal reviews, and provide pipeline oversight.
When does deploying an AI SDR make more sense?
You're pre-playbook. If you're still figuring out what message resonates with which ICP, running high-volume AI outbound generates signal faster and cheaper than paying a human SDR to run the same experiments. You're pre-revenue or early revenue — $80K in SDR salary before the motion is proven is a high-risk bet. Your ACV is SMB/mid-market. Sub-$20K ACV deals don't justify the per-deal cost of human SDR prospecting at scale.
What does the cost comparison look like?
All-in human SDR cost (salary + benefits + recruiting + tools + management time): $90,000–$130,000 per year. Ramp to productivity: 3–4 months. Attrition risk: average tenure 14–18 months, meaning you re-incur recruiting and ramp costs every 1–2 years. AI SDR cost: $2,400–$14,400 per year depending on platform. Ramp: days. Attrition: zero.
Can you run both?
Yes, and this is the most common pattern that works. AI SDR handles prospecting and outbound at volume. Human AE handles demos, negotiations, and closing. The human layer is focused entirely on the high-judgment parts of selling — the parts where relationship, live conversation, and real-time adaptation matter. The outbound that used to consume 60% of a human SDR's time runs autonomously.