Copywriting Agency: Website, Landing Page, Email and Ad Copy That Converts

Updated September 2026 · Written and maintained by the Progression Agency strategy team

A copywriting agency writes the words that sell: website and landing page copy, product descriptions, email sequences, ad copy, sales pages and brand messaging, grounded in research on the buyer and measured by conversion. Progression Agency is a copywriting agency in New York serving businesses across the United States and worldwide. This page explains what conversion copywriting involves, how copy is researched, which copy types we produce, how copy is tested, what a copywriting company should deliver, and what it costs.

What conversion copywriting involves

Conversion copy is written to move a reader to a defined action on a specific page. It starts with who the reader is and what they already believe, states the outcome they want, shows proof, answers objections and asks for the next step. It is edited for clarity and scanning, and it is measured. Our copywriting services page covers the SEO and content side; this page covers the agency engagement for conversion copy.

Businesses search for copywriting services, a website copywriting agency, an SEO copywriting agency, a B2B copywriting agency, a SaaS copywriting agency, a copywriting agency near me, conversion copywriting, landing page copywriting, email copywriting, ad copywriting, product description writing, a copywriter, brand messaging and copywriting cost. One engagement covers all of them.

Copy types we write

Research before writing

Every engagement begins with voice-of-customer research: interviews with recent buyers, review mining, sales call recordings, support tickets and search queries. The phrases buyers use become the copy’s vocabulary; the objections they raise become its structure. Drafts are delivered with the research so the client can see where each claim came from.

Writing for the page’s job

A page that must rank needs headings that match queries and depth that answers them; a page that must convert paid traffic needs message match and a single call to action; an email needs one job per message. We write to the job and say when a page is being asked to do two things at once, which usually means two pages.

Testing copy

Where traffic allows, headlines, offers and calls to action are tested with defined read dates and decision rules. Where it does not, we use research and the results of comparable pages. Wins are documented in the messaging library so they carry across channels. Our growth marketing page covers the testing loop.

Copy for regulated industries

Healthcare, finance, legal and supplements carry claim rules. Copy is written to the client’s regulatory guidance and reviewed by the client before publication; we flag claims that need substantiation and we do not write guarantees.

Copy and AI assistants

Pages that state what a product is, who it is for and what it costs in plain language are the pages assistants cite when buyers ask. Conversion copy that is specific serves both the reader and the model; vague copy serves neither.

Working with designers and developers

Copy is written with the layout in mind and delivered in a wireframe so that headings, proof and calls to action land where the eye goes. We work with your design team or ours; website design and development covers the build side.

What a copywriting agency delivers

1. Research summary: interviews, review mining, phrase library.
2. Messaging document: positioning, audience, objections, voice.
3. Copy drafts in wireframes, per page or sequence, with rationale.
4. Revisions within an agreed number of rounds.
5. Test plan where traffic allows.
6. Handover: messaging library the team can reuse.

How to choose a copywriting agency

• Ask to see the research behind a draft they wrote.
• Ask how they write differently for pages that rank versus pages that convert.
• Ask how copy is tested and what was learned.
• Ask how regulated claims are handled.
• Ask who owns the copy and the research. You must.

What it costs: copywriting

Email and content work is priced per deliverable or as a monthly program. For copywriting, the planning ranges below are from our marketing agency pricing guide; a quote follows a list of flows, segments and the volume of content each month.

Every figure above is a planning range already published on this site; the quote for copywriting follows a written scope, and the same ranges apply across the United States and worldwide.

Related services and guides

Pages on this site that sit next to copywriting and that a buyer usually reads alongside it.

• Copywriting services
• Content marketing agency
• Growth marketing agency
• Website design and development
• Email marketing
• Branding agency

Frequently asked questions