AI SDR vs Outsourced SDR Agency, What Actually Differs
Agency retainers run $5,000 to $12,000 a month with a three month minimum and a two to four week ramp. Here is how that compares to an AI SDR on speed, cost and replies.
What is the difference between an AI SDR and an outsourced SDR agency?
An outsourced SDR agency rents you people. You get one or two reps, usually shared across several clients, plus a campaign manager, and they write the copy and answer the replies. An AI SDR is software that does the sending, the replying and the booking itself. One gives you headcount you do not employ. The other gives you output without headcount.
The practical difference shows up in two places, and price is the least interesting of them:
What does an outsourced SDR agency cost per month?
Agencies run on monthly retainers. AiSDR's own comparison page puts the range at $5,000 to $12,000 a month for a rented team, and Vector Agents describes retainers running from a few thousand to over $10,000. Most agencies also want a three month minimum, because the first month is mostly setup.
Work the arithmetic on a mid range deal. $6,000 a month on a three month minimum is $18,000 committed before you have seen a single month of steady-state output. Month one includes two to four weeks of onboarding, so you are paying roughly $6,000 for a ramp period. Compare that to hiring in-house, where an SDR costs $80,000 to $120,000 a year fully loaded, or $6,700 to $10,000 a month, and the agency looks reasonable. Compare it to software and it does not.
| AI SDR (Gelee) | Outsourced SDR agency | |
|---|---|---|
| Monthly price | Custom | Monthly retainer |
| Typical commitment | Monthly | 3 months, ramp included |
| Time to first message | 15-minute setup | 2 to 4 weeks |
| Who writes the copy | You approve it once | An agency rep |
| Who answers replies | AI, in your voice, in seconds | A rep sharing you with other clients |
| Escalation to a human | Yes, when it is off-script | Always human, at human speed |
How long until either one sends a first message?
An agency takes two to four weeks. That covers kickoff calls, ICP definition, list building, copy approval and domain or account warm-up. Gelee has a 15-minute setup: you connect the LinkedIn account, hand over voice samples and your answers to the objections you already hear, and the first invites go out that day.
Ramp is not only calendar time. A new LinkedIn account should send 5 to 10 invites a day before it moves up to 20 to 25, which means the first two weeks are deliberately slow whoever is running them. If the agency is sending from your account, you are paying retainer during that ramp. If they are sending from their own accounts, you are paying for warm accounts that do not carry your name, and the connection request comes from someone your prospect has never heard of.
What happens when a reply needs a human?
Both models escalate, at very different speeds. Gelee answers the reply in seconds from the objections you loaded at setup, and hands off to you when the question is outside them. An agency rep answers when they get to your inbox, and that rep is usually working three to six other accounts. A reply that lands Friday at 6pm gets a response Monday.
The pattern that decides deals is who answers the third message, not the first. Something like this arrives constantly:
Roughly speaking, the first and third categories are most of the volume. An agency charges you human rates for all three and answers the third one at human speed. Gelee handles those two automatically and pings you on the middle one, which is the whole question of who answers replies.
How many meetings should either model book from LinkedIn?
On LinkedIn, our published benchmarks are 20 to 30% connection acceptance, 12 to 18% reply to the first message after acceptance, 5 to 8% on follow-ups, and 3 to 5% of total invites turning into a booked meeting. That last number is the one to hold an agency to, because it does not depend on who is doing the sending.
Run it at safe volume. 22 invites a day across 22 working days is roughly 480 invites a month. At 3 to 5%, that is 14 to 24 meetings. At a $6,000 retainer, that is $250 to $430 per meeting. Ask any agency you are evaluating for their accept rate and their meeting rate on your ICP, in writing, before signing the three months. If they quote a lead number instead of a meeting number, you are being sold volume.
One thing that moves the accept rate more than the copy does: your profile. Prospects open it before they decide, and a headline that says "Founder | Building in public" converts worse than one that names who you help. The LinkedIn headline rewriter fixes that in a couple of minutes.
When is the agency the better buy?
When the work is not really messaging. If your ICP is 200 named enterprise accounts, the path in is a phone call to a VP of Operations, and the qualifying conversation runs 15 minutes with technical questions, hire people. Software does not improvise on a call. Agencies with real industry reps do.
Two more cases where the agency wins outright. First, if you want someone accountable on a pay-per-meeting basis, some agencies will do that and software will not. Founders on r/startup keep pointing out that the agencies which just blast sequences fail hard on senior audiences, while pay-per-meeting arrangements at least put risk on the vendor. Second, if you need multi-channel with cold calling attached, an AI SDR running LinkedIn only is half your channel plan.
When is Gelee the wrong choice?
If you want to swipe a card tonight and test something before a standup tomorrow, Gelee is wrong for you. There is no self-serve signup, so setup starts with a call and pricing is shared there. A self-serve LinkedIn automation tool will have you sending within an hour of paying.
Also wrong if your list is bad. Pointed at the wrong audience, automated outreach burns brand trust and domain reputation, and it does it faster than a human would because it does not flinch at message 300. An agency researching 200 accounts by hand will produce fewer, better touches. If you cannot describe your ICP in one sentence, fix that before buying either.
So which one should you pick?
If you are a founder or a two-person team with one to three LinkedIn accounts, wanting 15 to 20 meetings a month from messaging, buy the AI SDR. You get sending the same day instead of week three, replies answered in seconds, and no three month minimum on a channel you have not proven.
If you have an enterprise ICP that closes on calls, or you want a vendor who is paid per meeting and carries the risk, hire the agency and hold them to a 3 to 5% invite-to-meeting rate.
Agencies running outbound for their own clients sit in a third position, and the economics there work differently again: running one system across many client LinkedIn accounts replaces the reps you would otherwise hire per account. If you are still choosing between software categories rather than models, the comparison of LinkedIn automation tools sorts them by who ends up answering the replies.