How to Choose a Lead Generation Agency (and What to Ask Before You Sign)

A lead generation agency runs marketing activity intended to produce enquiries from potential customers, then passes those enquiries to you. The work may include search optimisation, paid search and social, landing pages and forms, email, outbound prospecting, or buying and enriching contact lists. Agencies differ in which of these they actually run in house.

The word lead hides a wide range. A form submission, a booked call, a downloaded guide and a purchased email address are all called leads, but they behave very differently in a sales process. Before comparing agencies, write your own definition of a lead worth paying for, in terms your sales team would recognise.

Under a pay-per-lead model you are charged for each lead delivered, so cost scales with volume and the agency carries the risk of producing none. The weakness is incentive: the agency earns more by counting more leads, which can mean looser targeting, duplicates or low-intent sign-ups. Under a retainer you pay for time and deliverables regardless of volume, which funds steady work but does not tie payment to results.

A hybrid is often the most honest structure. A modest retainer covers strategy, tracking and reporting, with a variable element tied to a qualified lead that you define and verify in your own CRM. We recommend writing the qualification test into the contract, with a window for disputing leads that fail it. Avoid any model where the agency alone decides what counts.

Judge leads by what happens to them in your pipeline, not by how many arrive. Track each lead's progress: contacted, qualified, opportunity, closed. Then compare the agency's volume with the share that your team accepts as qualified. An agency that supplies two hundred leads of which five are usable has produced less than one supplying thirty of which ten are.

Ask where leads come from and how they are collected. A person who filled in a form on your landing page expressed interest in you. A person scraped from a directory did not. Ask for a sample of raw lead records, with the page, ad or list that produced each one, and check whether the consent wording on the form matches how you will contact them.

You should. The ad accounts, analytics property, Search Console property, call tracking numbers, CRM and landing pages should all be created in your name, with the agency given access as a user or manager. If the agency runs your campaigns inside its own accounts, you may lose the history, audiences and tracking when the contract ends. Ask directly: in which account will the campaigns live, who is the owner, and what do I receive on exit?

Contract wording should confirm that lead data, creative, tracking configuration and documentation are yours and are delivered in a usable format on request. Also ask who the agency's subcontractors and tools are, since your leads' personal information passes through them. Privacy and marketing rules vary by country and state, so confirm the specifics with counsel.

Hiring an agency does not move the legal responsibility. The FTC's CAN-SPAM guidance states that both the company whose product is promoted and the company that sends the message may be held responsible. It sets rules on accurate headers, identifying the message as an ad, a physical address and honouring opt-outs within ten business days. The FTC's guidance on the Telemarketing Sales Rule covers do-not-call requirements and says sellers and telemarketers must honour them.

So ask any agency that emails or calls on your behalf how it sources contacts, how it handles opt-outs and do-not-call lists, and where it keeps consent records. If it buys lists, ask for the provenance. This is a general summary, not legal advice, and requirements differ across states and countries, so check with a qualified adviser before launching outbound campaigns.

Good questions are concrete: which channels will you run, who does the work, what will you report weekly and monthly, how do you track a lead from click to closed deal, what happens to my accounts if we part, and how do you handle a lead that turns out to be junk. Ask to speak to the person who will actually run the account, and ask what the agency would need from your team for the plan to work.

Red flags include a guaranteed number of leads or rankings, refusal to give you account access, reports that show only the agency's own tool, a reluctance to define lead quality, vague answers about where contacts come from, and long lock-in terms with no performance review. Google's own search guidance notes that no one can guarantee a top ranking, so a promise to do so is a reason to walk away. We recommend a short paid pilot with a clear review date over a twelve-month commitment signed on a pitch.