How to hire a copywriting agency in the UK, and which ones clients say can write

A copywriting agency supplies the words that sell, explain or rank: website and landing page copy, ads, emails, brand voice, and long-form content. Most agencies are stronger in one of the families below – ask which.

In our shortlist, RBSEO is the SEO copywriting specialist, Pearl Lemon pairs content with B2B lead generation and SWC Partnership is the choice for creative and multilingual brand copy.

1. 1

   Name the job: search, B2B, creative or conversion copy

   Each needs a different writer. SEO copy answers a search query; B2B copy is built from interviews with your experts; creative copy produces ideas and a voice; conversion copy sells on one page.

2. 2

   Write the audience and the single action per page

   For every page or asset, one sentence on who reads it and what they should do next. A writer cannot fix a page that has three goals.

3. 3

   Collect the raw material

   Recordings of sales calls, your best-performing pages, competitor pages you envy, and three samples of copy whose tone you like. This saves more revision rounds than any other step.

4. 4

   Shortlist three agencies on evidence

   Reviews that describe writing (not just “great agency”), samples in your sector, and the name of the writer who will work on your account.

5. 5

   Pay for a test piece

   Brief each agency for the same 800-word page or article, with two revision rounds. You learn how they research, how they take feedback and how fast they work.

6. 6

   Check the draft like a sceptic

   Facts and figures sourced, claims you can substantiate under the UK advertising rules (the CAP Code, enforced by the ASA), originality checked, and the search intent matched.

7. 7

   Agree the process and the 90-day measure

   Who approves, turnaround time, revision rounds included, and the number you will review after 90 days: rankings and leads for SEO copy, conversion rate for landing pages.

Give each shortlisted agency the same brief and mark the results on a simple grid. Score each line from 1 to 5, then compare:

Also ask whether the draft was written with AI tools. Many agencies use them for outlines or research; what matters is that a named writer is accountable for the final text, and that you agree on the policy in writing.

Of the 37 agencies on the listing with at least 5 reviews and no sponsored placement, 12 have no UK office. Among the UK firms, 16 have fewer than 2 reviews that describe writing, and 4 look like something else entirely: more than a quarter of their reviews are about books or academic assignments.

4 profiles set aside: book ghostwriting, publishing and academic writing

Their copywriting reviews are about memoirs, manuscripts or university assignments. That is a different job from writing a landing page or a white paper, and academic ghostwriting may breach a student’s university rules. We list them for completeness:

Buyer’s guides for copywriting agencies keep naming the same US content studios and a few UK specialists. We looked each one up on Sortlist to assess it with the same method:

How they look on Sortlist

These agencies have a Sortlist profile but no verified review that describes copywriting, so we cannot score them:

• Velocity Partners (London) – A B2B marketing agency known for content; no reviews on Sortlist yet.
• Brafton (Sydney) – A content marketing agency with US, UK and Australian teams; no reviews on Sortlist yet.
• Siege Media (Austin, TX) – Known for content-led SEO; no reviews on Sortlist yet.
• MarketSmiths (New York) – A B2B copywriting agency; no reviews on Sortlist yet.
• VeraContent (Madrid) – A content writing agency with writers in several languages; no reviews on Sortlist yet.
• Wordify (Abu Dhabi) – A content and copywriting agency; no reviews on Sortlist yet.
• Web Tonic (Montréal) – A growth agency with 54 reviews (5.0) on Sortlist, but none of them describes copywriting and it has no UK office, so it is not ranked here.

We could not find a Sortlist profile for Stratton Craig, Reed Words, Fenwick, Eleven Writing, Verbal Identity, CopyHouse, Animalz, Omniscient Digital, Grow and Convert or Copyhackers, which also appear in other rankings. Without verified reviews on Sortlist, we cannot compare them fairly with the agencies above.

1. The sample

Sortlist lists 421 copywriting providers on this page. We evaluated the 220 agencies on the first three pages of the listing, in its relevance order. 39 of them have at least 5 verified client reviews – our threshold for a rating to be meaningful. 2 of those also pay for a sponsored placement and were set aside, leaving 37. Of these, 5 agencies with a UK office and at least 2 client reviews that describe copywriting or content writing were ranked, with 190 verified reviews between them and an average rating of 4.93; the 32 others are listed separately.

2. The score

3. Independence

• Sortlist is a marketplace, not an agency: it does not appear in its own ranking.
• Agencies cannot pay to enter the ranking or to move up. Agencies with a sponsored placement on this listing are excluded from scoring and shown separately.
• The order of the listing page, subscriptions and badges play no part in the score – only the three criteria above.

4. Limits

Reviews reflect each agency’s work across all its services, and agencies with few reviews may be excellent but are not yet scored. That is why every entry says what it is best for – and when another agency would suit you better. The ranking is updated regularly.

A rule of thumb: if you need fewer than a few pieces a month, a freelancer is usually cheaper. If you need dozens of pieces across formats, or content in several languages, an agency’s project management pays for itself. Compare the full monthly cost, including the time your own team spends briefing and editing.

Of the 220 copywriting profiles we evaluated, 150 state a minimum project budget: 112 start at €1,000, 10 lower, 2 between €1,001 and €2,999, 15 between €3,000 and €4,999, and 11 at €5,000 or more.

For orders of magnitude published elsewhere: buyer’s guides in 2026 cite marketplace rates from about $0.06 to $0.16 per word (Verblio) and agency prices from roughly $1,000 for a single project to $10,000 or more per month for retainers (Web Tonic’s copywriting guide). Treat them as a range, not a quote: UK pricing depends on the sector and on how much interviewing the writer must do.

1. The reader and the moment: who is reading, what they already know, what they are trying to do.
2. The one action the page or email must trigger, with the link or form it leads to.
3. Three adjectives for the voice, plus two examples of copy you like and one you dislike.
4. Words to use and avoid: product names, legal wording, terms competitors own.
5. For SEO copy: the target query, the top three pages that rank for it, and the angle you want that they miss.
6. Access to experts: a 30-minute call with someone who knows the product, and the person who signs off facts.
7. Claims to substantiate: every figure, comparison or guarantee, with its evidence.

• Pricing only per word, with no research time. It rewards padding; a good article takes research and interviews.
• No named writer. If you cannot ask who wrote the last piece, you cannot hold anyone accountable.
• Samples that are not in your sector or tone, and a refusal to write a paid test piece.
• Undisclosed AI-generated text. Ask for the policy in writing and a plagiarism and fact check on every delivery.
• Guaranteed rankings. No writer controls Google; judge SEO copy on process and on results after several months.
• Unsupported claims in the copy. “Best”, “number one” or “guaranteed” need evidence under the UK advertising code, and the responsibility is yours as the advertiser.