Sign inJoin the waitlist

Landing page agencies: what they build, how the fees work and how to brief one

A landing page agency sells one outcome, more of your visitors taking one action, so the brief should start with that action.

Published by AI Knows Us · Updated 12 October 2026

A landing page agency designs, writes, builds and tests single purpose pages that turn visitors from ads, emails and search into leads or sales. Hire one when you spend on traffic and the page that receives it converts poorly. Give the agency one action to drive, the audience, the traffic source and the number you convert at today, and judge the work by the conversion rate on your own traffic.

This guide explains what these agencies do, how they charge, how to brief them and how to check what they deliver.

What the service includes

  • Strategy. Who the page speaks to, the one action, the offer and the objection to answer.
  • Copywriting. Headline, subheading, benefits, proof and the call to action.
  • Design. Layout, hierarchy, imagery and mobile version.
  • Build. The page itself, in your platform or a page builder, with a form and a thank you step.
  • Tracking. Events for form starts, submissions and clicks, connected to your analytics and ad accounts.
  • Testing. A plan to compare versions and learn what lifts conversion.

Some agencies offer only design and build. Others add copy and testing. Ask which parts they do and which are left to you.

Kinds of agency

KindStrengthBest for
Design and build studioVisual quality and clean buildsA brand that needs a strong page set fast
Conversion specialistResearch and testingA business with steady traffic to test on
Performance marketing agencyAds and pages designed togetherPaid campaigns where the page and ad must match
Freelance specialistLow cost for a single pageA small test or a first page

How the fees are built

Per page

A fixed price for a page, usually including a set number of revision rounds. Clear and easy to compare. Check whether copy, imagery and the mobile version are in the price.

Monthly retainer

A fee for a number of pages and tests each month. Suits a team that runs many campaigns and wants continuous improvement.

Project plus testing

A fixed fee for the first build and a second fee for a testing programme. A sensible split, since the build and the learning are separate jobs.

Ask what each revision round covers, who owns the files and fonts, and what hosting or platform fees continue after launch.

Write the brief

  1. The one action. Book a call, start a trial, buy, download. One.
  2. The audience. Who they are, what they want and what stops them.
  3. The traffic source. The ad, email or search term that sends people, because the page must continue the same promise.
  4. The offer. What the visitor gets, at what price, on what terms.
  5. The proof available. Reviews, numbers you can source, named customers, certifications.
  6. The current baseline. Visits, conversions and the conversion rate today.
  7. The platform and constraints. Where the page will live and what must appear for legal reasons.

What a good landing page contains

  • A headline that repeats the promise of the ad or link that brought the visitor.
  • One clear call to action, repeated at sensible points.
  • Benefits written in the visitor's terms, followed by proof.
  • A short form that asks only for what you need.
  • No distracting navigation that pulls the visitor off the page.
  • A fast load time on mobile and a layout that works on a small screen.

Message match between the source and the page is one of the most common fixes. For the wider work of improving pages you already have, see web content optimization, and for the reading of a visitor who leaves at once, bounce rate and what it means.

How to judge an agency

  • Ask for pages they built and the conversion data they are free to share, along with how it was measured.
  • Ask about their process. Research, wireframe, copy, design, build, test.
  • Ask who writes the copy. A beautiful page with weak copy converts poorly.
  • Ask how they test and how much traffic is needed before a result counts.
  • Be wary of fixed promises such as "double your conversion rate". Nobody can promise a figure before seeing your traffic.

Testing needs traffic

Comparing two versions of a page gives a reliable answer only with enough visitors and conversions. A page with a few hundred visits a month can still be improved by good practice and research, but a split test would take too long to settle. In that case, make bigger, evidence-based changes and compare before and after periods with care. The agency should tell you which route fits your traffic.

Handover and maintenance

Ask for a short handover document: where the page lives, how to edit the text, how the form connects to your systems and how to pause the page. Pages age as offers and prices change, so agree who updates them and how quickly.

Pages that rank are a different brief

Pages for paid traffic and pages meant to rank in search are built differently. A paid landing page is focused and narrow. A page designed to rank needs depth and clear answers. Decide which you need before you brief, since the two goals shape the page. Our comparison of Google Ads and SEO shows how the two fit together.

What an assistant sends to your landing page

The visitors who arrive at a landing page are increasingly pre-briefed. A buyer asks an assistant "which provider is best for X and what should I pay", sees your name and a line about your offer, and clicks through already carrying a description of you. If the page says something different from that description, with another price, another promise or another audience, the visitor leaves.

So include the assistant's version of your offer in the brief. Ask ChatGPT, Gemini and Perplexity the questions your buyers ask, read how they describe your service and price, and make the landing page confirm it. AI Knows Us records those answers and their sources, which gives a landing page agency the exact wording buyers arrive with.

Questions about landing page agencies

How much does a landing page cost?

It depends on the scope, from a single page by a freelancer to a set of pages and tests by a studio. Get a fixed price against a written brief.

How long does it take?

A single page often takes a few weeks including revisions. Complex builds take longer.

Do I need a testing programme?

If you have steady traffic, yes. It produces the learning that makes the next page better.

Can I build landing pages myself?

Yes, with a page builder. An agency adds research, copy skill and testing.

What should I own at the end?

The page files, copy, images, tracking setup and test records.

Read next

AI Visibility Audit Deliverables for a UK Agency: The Five Artefacts, and Why the Zero Column Is One of ThemWhat a British agency should hand a client at the end of an audit, including the findings that did not survive a second reading.A Workflow Standard for AI Search Optimisation: Six Stations, and Who Owns Each OneThe execution sequence an Indian agency can hold a team to, measured against what our own site serves eleven named crawlers.The Multi Engine AI Citation Audit Framework: One Column Per Engine, Never a Blended ScoreA reproducible audit design for an Indian agency, built from 1,260 readings on 16 October 2026 and the 597 that came eleven days before it.A Small UK Agency Against a Large Consultancy on AI Search Optimisation: What the Citation Data Says Each One Can OwnThree British agency domains took dozens of citations each in our readings, and none of them is a large firm. Here is what that result does and does not tell a ten person shop.Build or Buy an AI Visibility Stack: The Five Silent Wrong Answers an In House Build ProducesWhat it actually takes to run a multi engine tracker yourself, measured from the defects in our own build, with rupee prices for the alternative.AI Search Optimisation and SEO in India: What Each One Costs, and What Each Return Is Counted InMost of the production work is already inside your search invoice, two budget lines are genuinely new, and the two results are counted in units that cannot be divided by each other.

Or browse the whole archive.

See what AI says about you.

The first scan is free, it needs no account, and it asks the questions your buyers ask.

Free. No card. We ask 5 real buyer questions on 2 AI apps.

Already sure you want this? Join the waitlist. We open on 31 October 2026. It costs an email address. No card, and nothing is charged. Or talk to a person if you have a question first. Or read how we fix what it finds.