(And What Actually Makes Them Great)
Let’s get this out of the way: most content marketing is forgettable.
Blogs written for bots. Strategy documents full of fluff. “Thought leadership” that says… absolutely nothing.
And yet, content still works — brilliantly — when it’s done right. That’s where the agencies below come in. They don’t just churn out keywords. They help brands think bigger, rank better, and speak louder.
So whether you’re a fast-moving startup or an enterprise with legacy baggage, here’s your guide to the best content marketing agencies in the UK right now — and why they might (or might not) be right for you.
1. Grizzle
Location: London
Speciality: B2B SaaS content & SEO
Why they’re worth your attention:
Grizzle isn’t pretending to be a full-service agency. They focus hard on one thing: helping B2B SaaS brands grow traffic and leads through standout blog content, thought leadership, and smart SEO. And it works — they’ve helped brands like Pipedrive scale their inbound without sacrificing brand tone or authority.
Best for: SaaS companies who want serious SEO results with a journalistic edge.
2. Growth Hakka
Location: London (Global Reach)
Speciality: Growth-led content marketing and integrated campaigns
Why they’re different:
Growth Hakka takes a hacker’s mindset to content. It’s not just about writing well — it’s about making content work. That means obsessing over distribution, layering in automation, testing hooks, repurposing across channels, and tying everything back to metrics that matter.
This agency doesn’t do cookie-cutter retainers. They build flexible, data-led programs that evolve based on performance. Need to plug content into email flows? Turn case studies into LinkedIn videos? Launch and track an AI-powered outbound campaign? Growth Hakka’s got the chops and the tools.
Best for: Brands that want content that drives actual pipeline — not just pretty blog posts.
Explore what Growth Hakka does →
3. Scribly
Location: Remote-first
Speciality: Productised content marketing for startups
Why they’re worth a look:
Scribly offers content-as-a-service with pre-priced packages. If you’re too busy to brief freelancers every week, or you want a no-drama writing team that just gets it, they’re a strong option. They’re particularly good with early-stage SaaS companies who need fast, consistent content without overthinking it.
Best for: Founders and marketing leads at Series A–B startups who want to move fast.
4. Velocity Partners
Location: London
Speciality: Creative B2B storytelling
Why they’re a big deal:
Velocity has been pushing B2B brands to think more boldly about content since before it was trendy. Their work is sharp, well-researched, and often funny — which is rare in the B2B world. They’re not cheap, but if you want agency-level thinking that makes your competitors sweat, they’re worth a call.
Best for: Enterprise brands with the budget and bravery to try something different.
5. Builtvisible
Location: London
Speciality: SEO + content + analytics
Why they’re strong:
Builtvisible brings content and analytics together under one roof. That means fewer “gut-feel” campaigns, and more decisions based on hard data. Their content work is deeply researched, technically sound, and performance-oriented.
Best for: Brands that want to tie content to measurable business outcomes.
6. Seeker Digital
Location: Bristol
Speciality: Link-building and SEO content
Why they’re useful:
Seeker focuses heavily on content that earns links — think digital PR meets content strategy. They’re solid for technical SEO foundations and outreach that doesn’t feel spammy. A good bet if you’re trying to build domain authority fast.
Best for: Companies focused on SERP domination and link acquisition.
7. Content Hero
Location: Manchester
Speciality: Copywriting & blogging at scale
Why they’re solid:
Content Hero offers copywriting without the fluff. They’re practical, straightforward, and good at turning briefs into readable, structured content. They’re especially useful for brands who’ve nailed strategy but need help getting the writing done.
Best for: In-house marketers who need volume with quality.
What Great Agencies Actually Do (That Others Don’t)
The best content agencies aren’t just writing machines — they’re growth partners. Here’s what they tend to do differently:
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Obsess over distribution.
Publishing isn’t the same as promoting. Great agencies bake amplification into the plan from day one. -
Marry creative and commercial.
It’s not art for art’s sake. Content should win hearts and earn ROI. -
Use systems, not silos.
Smart teams connect content to email, paid, organic, social, CRM and sales enablement. -
Write for people — and for Google.
It’s not one or the other. The best content feels human but ranks like a machine.
Mistakes to Avoid When Hiring a Content Agency
Before you sign a contract, watch out for these red flags:
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They can’t explain how their content drives business value.
If it’s all vibes and no numbers — walk away. -
They outsource everything and don’t quality-check.
Ask who’s actually doing the writing and editing. Demand samples. -
They sell you on strategy, then ghost you post-kickoff.
You want partners, not vendors. -
They use AI tools without human oversight.
GPT-4 is great — but not on autopilot. Check for quality control.
Final Word: Invest in Value, Not Volume
In 2025, content isn’t just a channel — it’s infrastructure. Your website, your socials, your nurture campaigns, your case studies — they all rely on words that work.
So don’t chase cheap words. Hire a team who understands the bigger picture. Someone like Growth Hakka, if you’re serious about growth. Or one of the others above, depending on your goals and internal setup.
