A B2B growth agency is an agency that has chosen not to say which service it sells, and the buyer's first job is to decide which number growth means for the company: qualified pipeline, closed revenue, expansion revenue from existing customers, or retention. Each is a different engagement with different channels and different evidence, and an agency that agrees to be measured on the company's number is a different purchase from one that reports its own. This page sets out the four numbers, the definitions a company writes before hiring, the channels a growth agency usually runs and which number each one moves, and the evidence to ask for. The best B2B content marketing agency guide on this site covers the content half; the agencies indexed here are listed on what they publish.
Growth is one of four numbers, and the company chooses
Qualified pipeline is opportunities accepted by sales under a definition the company wrote. Closed revenue is the pipeline that closed inside the sales cycle. Expansion is revenue from existing accounts buying more. Retention is the revenue that did not leave. A growth agency can move any of them, but not all at once and not with the same work, and a proposal that promises growth without naming the number has not been asked which one. The company chooses, writes the definition and the measurement, and the agency's fee and report follow it. An agency paid on its own number, traffic, MQLs, followers, will produce that number.
The channels, and the number each one moves
Search and content move pipeline slowly and durably, and the pages have to meet Google's standard for helpful content, linked below, to move it at all. Paid search and paid social move pipeline quickly and stop when the budget stops. Outbound moves pipeline into a named account list under the CAN-SPAM rules linked below. Lifecycle email and customer marketing move expansion and retention, and they are the channels a growth agency pitching pipeline rarely mentions. Partnerships and reviews move closed revenue by shortening the cycle. An agency's proposal should say which channels it will run and which number each is expected to move, with the evidence per channel from a comparable client.
The definitions to write before hiring
The ideal customer profile in a paragraph. What a qualified opportunity is and who accepts it. The sales cycle length, so closed revenue can be attributed inside it. The current pipeline and revenue by source, so the agency's contribution can be read. Who owns the data, the ad accounts, the outbound domain and the content at the end. A company that cannot write these is not ready to buy growth, and the honest agency says so; one that has written them can compare two agencies' proposals on the same terms and pay on its own number.
The evidence to ask for, and what to refuse
A named comparable client with permission, the number the agency was measured on, the starting figure, what was done by channel, the result and the period. The agency's own growth, which is the one campaign the buyer can inspect end to end. A fee model that pays on the company's number or a flat fee, not on spend or on the agency's own metrics. Refuse a guaranteed figure before the definitions exist, a logo wall as evidence, and a contract longer than the sales cycle it is measured against. The best B2B content marketing agency guide on this site covers the content channel; the B2B demand generation services guide covers the pipeline agencies listed on what they publish.
Questions people ask about B2B growth agency
What does a B2B growth agency do?
Whatever the company defines growth as: qualified pipeline, closed revenue, expansion or retention, moved by search, content, paid, outbound, lifecycle email or partnerships. The company writes the number and the definition; the agency agrees to be measured on it or it is reporting its own.
How should a growth agency be paid?
On the company's number or a flat fee, never on ad spend or on the agency's own metrics such as traffic or MQLs. A fee tied to a metric produces that metric.
What evidence should a B2B growth agency show?
A named comparable client with permission, the number it was measured on, the start, what was done by channel, the result and the period; and the agency's own growth. A logo wall is a list of past invoices.