The fastest way to evaluate a sales outreach agency: ask questions where a bad agency has to either lie or reveal itself. After a decade in outbound, and years running an agency hearing what companies tell us about the ones they left, we know exactly which questions those are. Here are the 12 we'd ask before signing anything, and what a good answer sounds like.
1. Who owns the domains and mailboxes you'll send from?
The answer must be you. If the agency sends from infrastructure it owns, then when you part ways, your sender reputation, warm domains, and sending history leave with them. Domains and mailboxes should be bought in your name, warmed for your campaigns, and handed over on exit.
2. Will they show you the actual sending setup?
Ask them to walk you through their deliverability setup: SPF, DKIM, DMARC, warm-up process, volume limits per mailbox. You don't need to understand every acronym; you need to watch whether they do. An agency that gets vague here is an agency that will land you in spam. (Our deliverability checklist covers what a competent setup looks like, in plain English.)
3. How do they build your prospect list, and can you veto it?
Bad outreach starts with bad targeting, not bad copy. A serious agency will spend real time defining your ideal customer profile before sending anything, show you sample accounts and contacts, and give you veto power. If list-building is a black box, the emails will go to people who were never going to buy.
4. Who writes the copy, and how often does it change?
Two failure modes here: copy written once by a junior and never touched again, and copy generated in bulk by AI with a name token swapped in. Ask to see real sequences from past campaigns, and ask how often messaging is iterated. The right answer involves a regular cadence, weekly or biweekly, driven by reply data, not by the calendar.
5. What volume will they send, and is it survivable?
If an agency promises thousands of emails per day out of the gate, run. Sustainable cold email runs on limited volume per mailbox per day, scaled horizontally across warmed domains. Volume promises that sound impressive are usually deliverability disasters on a short fuse.
6. What do they count as a 'lead' or a 'meeting'?
This is where pay-per-meeting arrangements get slippery. Is a 'meeting' anyone who agreed to a call, or a contact matching your ICP with a genuine problem you solve? Get the qualification definition in writing. A cheap meeting with the wrong person is more expensive than no meeting: your closers spend hours on calls that were never going to convert.
7. What happened with their last three clients in your space?
Not logos: stories. What was the starting point, what did the first 90 days look like, what went wrong, what did they change? An agency that says nothing ever goes wrong is telling you it either hides problems or hasn't run enough campaigns to hit them. Every honest outbound story includes a slow start or a pivot.
8. Who actually works your account day-to-day?
The people in the sales call are rarely the people writing your emails. Ask who runs your account, how many other accounts they carry, and whether you can meet them before signing. An account manager spread across fifteen clients cannot iterate your campaign weekly, no matter what the contract says.
9. What do they need from you to succeed?
Trick question: the good ones have a demanding answer. Real outbound needs your input: customer knowledge, objection patterns, feedback on reply quality, fast responses when a prospect engages. An agency that says 'nothing, we handle everything' is describing spray-and-pray. The right answer sounds like a weekly working relationship, not a vending machine.
10. How do they report, and on what numbers?
Ask for a sample report from a real (anonymized) client. You want to see the full funnel, including delivered, opened, replied, positive replies, and meetings booked, not just a proud tally of emails sent. And ask which number they consider their north star: the answer should be positive replies or qualified meetings, never volume.
11. What does month one actually look like?
A competent agency's first month is mostly foundation: domains, warm-up, list building, messaging, and a modest first send. If the pitch promises a full calendar of meetings in week two, someone is either skipping the foundation or planning to buy you meetings that won't convert. We wrote an honest breakdown of how long outbound takes to show results, and hold their timeline against it.
12. How does the engagement end?
The most revealing question of all. What's the notice period? What do you keep: domains, data, sequences, learnings? Is there a handover? An agency confident in its results makes leaving easy, because clients stay for the pipeline, not the lock-in. Long lock-ins before any results, and assets that don't transfer, are the two loudest red flags in this industry.
Frequently asked questions
How long should I commit to an outreach agency?
Three months is the honest minimum. The early weeks are infrastructure and testing, and the data only becomes meaningful after that. Be wary of both extremes: 12-month lock-ins before anything is proven, and promises of meetings in week one.
What results should an agency guarantee?
Activity and process can be guaranteed; outcomes can only be forecast. An honest agency commits to volume, quality standards, and iteration cadence, and gives you a realistic range for your market instead of a guaranteed number designed to close the sale.
Use these questions on us
We wrote this list knowing full well you might read it and then interview us with it. Good: that's the point. If you're evaluating agencies right now, book a call and ask us all twelve. If our answers don't hold up against our own checklist, you shouldn't hire us either.