How to Choose a B2B Lead Generation Agency: 12 Questions to Ask (and How to Check the Answers)

Short answer: Choose a B2B lead generation agency by testing it, not by listening to it. Ask for sample records and draft emails for your buyers, the spam and bounce rates of their current campaigns, who runs your account, how a qualified meeting is defined in the contract, and what you keep if you leave. Then verify each answer yourself before you sign.

I have sat on both sides of this table. At American Express and Amazon I was the buyer, listening to vendors promise pipeline. Now I run an outbound agency and I am the one being asked the questions. Here is what I have learned from both seats: almost every agency answers well on a sales call. The answers sound the same. What separates a good agency from an expensive mistake is whether the answer survives a check.

So this guide does not just list questions. For each of the 12, you get the answer to listen for, the answer that should worry you, and a quick check you can run yourself, most of them in five minutes. At the end there is a scorecard so you can compare two or three agencies fairly. If you are still deciding whether to outsource at all, start with our breakdown of what outbound lead generation costs, agency vs in-house, then come back here.

Before the first call: write down three numbers

You cannot judge an agency's answers if you do not know what you need. Before you book a single call, write down:

• Your average first-year deal value. This tells you what a meeting is worth and how much you can sensibly spend per meeting.
• Your close rate from a first meeting. If you close one in ten, you need ten meetings per deal. Be honest; a guess is fine, but label it as one.
• Your target market in one sentence. For example: "Heads of IT at US logistics companies with 200 to 2,000 employees." If you cannot write this sentence, the agency will write it for you, and it will be broad.

Share these on the first call. A good agency will push back on them. One that simply agrees with everything is telling you something too.

Part 1: Do they understand your buyer?

1. "Can you show me 25 sample records from the list you would build for us?"

Good answer: "Yes. Give us your ICP sentence and we will send a sample within a few days, with job title, company size, location and the source of each email."
Weak answer: "We have a database of millions of contacts, you will be fine."
Check it yourself: open five records at random on LinkedIn. Is the person still in that role? Is the company the size you asked for? If two out of five are wrong, the list will be wrong at scale.

2. "What would the first email to my buyer actually say?"

Good answer: two short drafts written for your market, each with a clear reason to reply, plus the follow-ups.
Weak answer: "Our copywriters handle that after onboarding."
Check it yourself: forward a draft to a friendly customer who matches your buyer and ask, "Would you reply to this?" Their answer is worth more than any agency's opinion, including mine.

3. "Who will actually run my account, and how many other clients do they run?"

Good answer: a named person, the number of accounts they manage, and an offer to meet them before you sign.
Weak answer: the founder who is pitching you, with no mention of who takes over after the contract.
Check it yourself: ask to have the account manager on the second call. If that is "not possible yet," assume someone junior will run your campaigns.

Part 2: Is their engine healthy?

4. "Which domains and inboxes will send, and who registers them?"

Good answer: separate sending domains that look like yours (never your main company domain), each with SPF, DKIM and DMARC set up, warmed before launch, and registered in a way that can be transferred to you. We explain how we set this up on our infrastructure page.
Weak answer: "We will just send from your domain, it is easier."
Check it yourself: ask for one of their existing sending domains and paste it into any free DMARC lookup tool. If an agency's own domains fail the basics, yours will too.

5. "What spam complaint and bounce rates are your campaigns running at right now?"

Good answer: actual numbers, and a comparison with Gmail's limits. Google's sender guidelines tell senders to keep spam rates in Postmaster Tools below 0.10% and to avoid ever reaching 0.30%.
Weak answer: "Deliverability is great." No numbers, no tools named.
Check it yourself: ask them to share their screen and show the sending tool's dashboard for one live client (names hidden). It takes two minutes if the numbers are good.

6. "Walk me through the first hour after a prospect replies."

Good answer: who reads the reply, how fast, how interested replies are handled, how the meeting gets booked on your calendar and how the lead reaches your CRM with the full conversation.
Weak answer: "We forward positive replies to you."
Check it yourself: reply to one of their own sales emails (most agencies cold email, so you may already have one) with a simple question. Time the answer. This is how your prospects will be treated.

Part 3: Can you see the truth?

7. "What exactly counts as a qualified meeting, and can that be in the contract?"

Good answer: a written definition you agree together: right title, right company size, right region, the prospect attends, and you can reject meetings that do not match.
Weak answer: "Any booked call with a decision maker." Who decides what a decision maker is?
Check it yourself: read the draft contract. If the definition is not there, it does not exist.

8. "Will I get my own login to the sending tool and the CRM?"

Good answer: yes, view access from week one, so you can read every email sent and every reply received.
Weak answer: "You will get a monthly report."
Check it yourself: ask what you would see on day 10. A good agency can show you a client view right now.

9. "Can I choose two references from your client list myself?"

Good answer: "Here is our client list in your industry, pick any two."
Weak answer: two hand-picked references and a set of logos.
Check it yourself: when you speak to a reference, ask, "What went wrong in the first 60 days and how did they handle it?" Every engagement has a rough patch; the useful part is how it was fixed.

10. "What would make you tell me outbound is not right for us?"

Good answer: specific reasons, such as a deal value too small to pay for the meetings, a market too narrow to reach, or a product that is not ready.
Weak answer: "Outbound works for everyone."
Check it yourself: this one has no tool. Listen. An agency that cannot say no will not tell you when a campaign is failing either.

Part 4: What happens when it ends?

11. "How do you stay within the rules in my markets?"

Good answer: market-by-market specifics. In the US, CAN-SPAM basics: a real sender, a physical address and a working opt-out. In the UK, the ICO's B2B guidance lets you email employees at limited companies without prior consent if you identify yourself and offer an easy opt-out, but sole traders and some partnerships are treated like individuals and need consent. In the EU, a documented legitimate-interest assessment under GDPR. In Saudi Arabia, awareness of the PDPL.
Weak answer: "It is B2B, so GDPR does not apply." It does, whenever you process a named person's data.
Check it yourself: ask how they keep and share the suppression list (everyone who opted out). If there is no clear answer, there is no list.

12. "If we stop after 90 days, what do I keep?"

Good answer: the sending domains and inboxes, the prospect list, all copy and sequences, and the full reply history, exported within an agreed time (two weeks is a fair ask).
Weak answer: "We have never had a client leave." That is not an answer.
Check it yourself: find the termination clause in the contract and read it twice. Then look for auto-renewal and the notice period next to it.

The scorecard: compare agencies on the same scale

Score each answer 0 (weak or no answer), 1 (reasonable, not verified) or 2 (good answer you have checked). Multiply by the weight. The weights below reflect where I see engagements fail most; change them to fit your situation.

The agencies above are made up to show how the scoring works. Notice that Agency B scored well on the "people" questions (a named manager, fast replies, happy references) and badly on the "engine" questions. That is the agency with the best sales call and the weakest machine, and it is the most common trap.

Agency name:
Date of call:          Who was on it:

Score each: 0 = weak/none, 1 = reasonable, not checked, 2 = good and verified

Q   Topic                              Weight  Score  Weighted  Notes
1   25 sample records                   3
2   Two draft emails for our buyer      2
3   Named account manager + workload    2
4   Sending domains, SPF/DKIM/DMARC     3
5   Current spam and bounce rates       3
6   First hour after a reply            2
7   Qualified meeting in contract       3
8   Our own login to tools and CRM      2
9   References we pick ourselves        1
10  When they would say no              1
11  Rules in our markets + suppression  2
12  What we keep if we stop             3
                                      Total (max 54):

Deal-breakers (any one = do not sign):
[ ] Will send from our main company domain
[ ] No written definition of a qualified meeting
[ ] No handover of domains, list and copy on exit

Where buyers in the US and UK see things differently

The questions are the same everywhere, but the weight you give them is not.

• US buyers tend to care most about speed and volume, and inboxes are crowded. Give questions 2 and 5 extra weight: weak copy and poor deliverability fail fastest in a crowded market. See how we approach it on our US lead generation page.
• UK and European buyers should give question 11 more weight. The corporate vs sole trader line in the UK, and legitimate-interest records in the EU, are where careless agencies create risk for you. More on our UK and Europe page.
• Selling into several regions at once? Ask question 3 again for each market: who on the team knows that market's buyers?

When you should not hire an agency yet

An honest list, because a bad fit wastes your money and our time:

• Your first-year deal value is so small that even a few hundred dollars per meeting cannot pay back.
• You cannot write the one-sentence target market from the first section.
• Nobody on your side can take the meetings within a day or two of booking them.
• You need closed revenue in 30 days. First meetings with a good agency usually take two to three weeks; deals take longer.

If none of those apply, a 90-day engagement with written milestones is the sensible way to start. If you are an agency yourself, reading this from the other side, our guide to what a lead gen agency needs from its CRM covers the reporting and client access these questions will ask of you.

Bottom line

Do not choose the agency with the best answers. Choose the one whose answers you could check. Ask for sample records and draft emails before signing, ask for deliverability numbers and live access, and get the qualified-meeting definition and exit terms in writing. Score every agency on the same 12 questions and the right one is usually obvious. For our own plans and what is included, see pricing and how our lead generation works.

Sources

• Gmail spam rate limits (below 0.10%, never 0.30%), SPF/DKIM/DMARC and one-click unsubscribe for bulk senders: Google, Email sender guidelines (checked 2026-10-09)
• UK B2B email rules, corporate vs individual subscribers: ICO, Business-to-business marketing
• US commercial email basics: FTC, CAN-SPAM Act compliance guide for business
• Contract terms buyers commonly ask for (asset ownership, data handover on exit): Cleverly, lead generation agency contracts, SaaS Hero, lead generation agency contract tips (both are agency blogs, so read them as practitioner opinion)

About the author

Subhendu J Shawn is the founder of B2BXclusive, a B2B outbound sales and lead generation agency, and the creator of Tailr CRM. His experience spans American Express, Amazon and 100+ B2B companies across the US, Europe, the Middle East and India. Follow on LinkedIn