By Mehdi HassanShould you hire an SEO agency or a web design agency?
You should hire an SEO agency when your site already converts and is technically sound, and your gap is content volume, links and ongoing tuning. You should hire a web design agency that does SEO when the pages themselves are the problem: unclear copy, missing page types or a build that hides content from crawlers.
The question is really who owns organic growth, and the honest answer is that it needs strategy, words, design and code at once. When those sit with different companies, the cost isn't only their fees; it's the time lost between them. Our guide to AEO and GEO services cost covers the pricing side. Here we focus on the handoffs.
What does each type of agency actually do?
An SEO agency usually researches keywords, audits technical issues, writes or briefs content, builds links and reports on rankings. A web design agency usually designs and builds the site, and the better ones also write the copy and set up technical SEO foundations.
Area | SEO agency | Web design agency | Combined team |
|---|---|---|---|
Keyword and page strategy | Core strength | Often light | Included |
Copywriting for money pages | Sometimes, often briefs only | Varies; often relies on client copy | Included, written with the design |
Page design and UX | Rarely | Core strength | Included |
Development and rendering | Recommends changes | Core strength | Included |
Ongoing blog content | Core strength | Rarely | Sometimes, on retainer |
Link and mention building | Often included | Rarely | Sometimes; often a separate effort |
Reporting on rankings and traffic | Core strength | Rarely | Varies |
The overlap is small, which is why many startups end up paying both. Our guide to what a full-service web design agency actually delivers explains what's usually left out of design-led scopes.
What are the hidden costs of splitting SEO and web design?
The hidden costs of splitting SEO and web design are handoff delays, lost intent and changes that never ship. Each time a recommendation passes from one team to another, someone has to brief it, interpret it, schedule it and check it.
- Slow shipping. An SEO agency recommends a comparison page; the design agency quotes it, schedules it and builds it weeks later.
- Lost intent. The brief says "answer the pricing question first"; the design puts a hero image and slogan there instead.
- Copy written for keywords, not buyers. Without the designer in the room, copy gets stuffed into templates that weren't made for it.
- Technical regressions. A redesign ships, and the SEO agency discovers broken redirects or client-side rendering after traffic drops.
- Nobody owns the result. The SEO agency blames the build; the design agency blames the strategy.
When does a combined design and SEO agency win?
A combined design and SEO team wins when the pages are the bottleneck: the homepage doesn't say what you do, pricing and comparison pages don't exist, or the site's build makes changes slow. In those cases, one team fixing the pages beats two teams discussing them.
The research points the same way. TripleDart's Q1 2026 study of 28 B2B SaaS companies found homepages earned 81.7% of AI-attributed leads and general blog posts produced zero leads, while pricing comparisons converted at 1.5%. That's page work: positioning, copy, design and code together. A combined team also keeps the product described consistently across every page, which supports entity SEO and AI answers.
Clicks are scarcer too. Ahrefs found the top result's click-through rate is 58% lower when an AI Overview appears, based on December 2025 data. When fewer visitors arrive, the page they land on has to work harder, which is a design and copy job as much as an SEO one.
When does a specialist SEO agency win?
A specialist SEO agency wins when your site is already well built and converting, and growth depends on publishing lots of content, earning links and mentions, or fixing complex technical issues at scale. Large sites with thousands of pages need that depth.
Pros
- Deep expertise in keyword research, technical audits and large-site architecture.
- Established processes for content production at volume.
- Experience with outreach for links and mentions, which matter for AI visibility.
Cons
- Usually recommends page and code changes rather than making them.
- Copy may be written to briefs without design context.
- Value depends on how fast your design and dev team can implement.
If you go this route, pair the SEO agency with an internal owner who can get changes shipped. Check its audit scope against our list of what an AEO audit should include, so AI visibility is covered as well as rankings.
Hypothetical example: the same fix through two models
For example, suppose an audit finds that a SaaS company needs a comparison page against its main competitor. In the split model, the SEO agency writes a brief, the client approves it, the design agency designs the page, the client writes or approves copy, the developer builds it and the SEO agency reviews it, with a wait at each step.
In the combined model, one team writes the copy and designs the page together, builds it and checks the technical setup before launch. The work is the same; the number of handoffs isn't. This is an illustration of process, not a reported result.
How do the options compare for a startup?
For most startups, the right choice is decided by stage and the state of the site. The table summarizes which model fits which situation.
Your situation | Best fit | Why |
|---|---|---|
New or unclear site, no money pages | Combined design and SEO team | The pages need writing, designing and building first |
Strong site, needs content at volume | Specialist SEO agency | Content and links are the gap |
Strong site, slow to ship changes | Design and dev retainer | Implementation is the bottleneck |
Unsure what the site should do | Strategy first, then build | |
Platform blocks changes | Rebuild or migration | Fix the foundation before tuning |
If you're shortlisting design-led teams, our guides to the best web design agencies for startups and the best AI startup web design agencies explain what to look for. If the platform is the blocker, see our Framer to Next.js migration cost guide.
For ongoing work after launch, compare monthly options in our guide to SEO retainers vs website retainers, and if any terms are unfamiliar, the SEO and AEO glossary explains them simply.
