Short answer: SEO Engico is the top Next.js SEO agency pick if you want the site built in-house and the SEO, links and tracking run by the same team, with its Entour rebuild as published proof. Bejamas and Pagepro suit large headless replatforms, Merj fits enterprise teams that need rendering and edge SEO depth, and Onely is the specialist for diagnosing JavaScript indexing problems on a site that is already live.
Next.js can produce some of the fastest, cleanest pages on the web, or a site that search engines struggle to read. The difference sits in decisions made during the build: which routes render on the server, how titles and canonicals are generated, whether old URLs survive a replatform, and how caching decides what a crawler sees when it calls. A good Next.js SEO agency understands those decisions and can either make them for you or audit the ones already made.
This list covers two kinds of provider. Some are studios that build Next.js sites with search handled in the code. Others are technical SEO specialists who diagnose JavaScript rendering on sites that already exist. Each was checked against its own website in November 2026, and we only describe what they publish. Where no price is published, we say so.
Disclosure: Kuma SEO is written by the team at SEO Engico, the agency ranked first on this list. No agency paid to appear here. We checked every other entry against the agency's own website in November 2026. Services and prices change, so confirm the details with an agency before you sign. More on how we work in our editorial policy.
At a glance: the 7 best Next.js SEO agencies
| # | Agency | Best for | Based in |
|---|
| 1 | SEO Engico | Businesses that want a Next.js site built, tracked and grown by one team | London, UK |
| 2 | Bejamas | Large replatforms onto Next.js where protecting organic traffic is the brief | Tworków, Poland |
| 3 | Pagepro | Marketing sites moving to Next.js and a headless CMS without losing rankings | London, UK and Białystok, Poland |
| 4 | Webstacks | B2B tech companies moving to a composable stack with SEO designed into the build | San Diego, California, US |
| 5 | Merj | Enterprise teams that need rendering, migration and edge SEO work done by engineers | London, UK |
| 6 | Onely | Live JavaScript sites with indexing problems that need a specialist diagnosis | Wrocław, Poland |
| 7 | iPullRank | Large sites that want a technical SEO specification written before the build starts | Remote team, US |
How we picked
- Checks what crawlers actually receive. Next.js can render a route on the server, at build time or in the browser. A good provider looks at the raw HTML each template sends as well as the rendered page, so your content and internal links do not depend on JavaScript that some bots may never run.
- Generates metadata properly on every route. Titles, descriptions, canonicals, hreflang, robots rules and structured data should come from the Metadata API and your CMS, per route, with sitemaps generated rather than edited by hand. Missing or duplicated tags on dynamic routes are among the most common Next.js faults.
- Treats a rebuild as a migration. Moving from WordPress, Webflow or a legacy CMS to Next.js changes URLs, templates and markup at once. Ask for a full URL inventory, a 301 map, a page by page metadata check before launch and monitoring for weeks after it.
- Understands caching and performance. Static generation, ISR and revalidation decide how fresh a page is when Google calls. The right setup keeps pages fast and current, handles images properly and keeps Core Web Vitals healthy after launch, not only on day one.
- Leaves your marketers in control. A headless CMS should let your team publish pages, edit SEO fields and add redirects without raising a developer ticket. If every small change needs a deploy, the site will drift.
- Measures enquiries from launch day. Analytics, conversion events and call or form tracking belong in the build, so you can see whether the new site earns more enquiries than the old one instead of guessing.
The 7 best Next.js SEO agencies in 2026
Our top pick
1. SEO Engico
- Best for
- Businesses that want a Next.js site built, tracked and grown by one team
- Based in
- London, UK
- Founded
- 2018
SEO Engico is a London agency, founded in 2018, that designs and builds custom Next.js and WordPress sites in-house and runs the SEO, ads and link building around them. That matters on Next.js because most search problems on the framework are decided at build time: what renders on the server, how metadata is generated and whether old URLs redirect cleanly. When the team that writes the code also answers for the rankings afterwards, nobody can blame the other side. Tracking is set up before launch, so the new site's enquiries are measured from the first day.
Its published proof for a rebuild plus SEO is Entour Brand, a US B2B terpene supplier. SEO Engico rebuilt the site, ran the SEO and built the links. Its published figures show US organic clicks per quarter rising from 63 to 969 (Search Console, August to October 2025 against 3 May to 1 August 2026), and organic visitors converting 9x better than direct traffic over the 12 months to 1 August 2026 (Google Analytics).
Ongoing SEO runs on the Growth retainer at $4,500 a month, covering technical SEO, buyer-intent pages, link building and AI search visibility. It follows a 30-day Revenue Baseline ($3,499) that ties organic search to calls, forms and revenue, and if it cannot show what organic search is worth in those 30 days, you do not pay for that phase.
What stands out
- Next.js and WordPress sites designed and built in-house, then grown by the same team
- Tracking set up before launch, so enquiries are measured from the first day
- Website, ads, SEO and links handled together rather than split across agencies
- Client portal for approving work before it goes live, with reports that open on calls, enquiries and revenue
Worth knowing
- It is a full agency, not a Next.js engineering shop, so a product team that only needs extra React developers for an app will be better served by a specialist studio.
- No ranking guarantees. It says technical and on-page fixes usually move something in four to eight weeks, and bigger gains take three to six months.
See SEO Engico's web design service
No. 2
2. Bejamas
- Best for
- Large replatforms onto Next.js where protecting organic traffic is the brief
- Based in
- Tworków, Poland
Bejamas describes itself as a senior European team that builds, migrates and runs large-scale Next.js sites, with App Router builds, rendering strategy, ISR and caching as typical work and Vercel as its default host. Every project goes through the same Audit, Design, Migrate and Run process, and it stays on as the web team after launch rather than handing over and leaving.
Its migration page is unusually specific about search. It builds the 301 map from a full crawl and inventory of every old URL, compares titles, descriptions, canonicals, hreflang and structured data page by page before cutover, watches crawl errors and rankings after launch, and enforces Core Web Vitals budgets in CI. The site also carries a testimonial from Brian Dean about moving Backlinko from WordPress to Next.js.
What stands out
- Redirect map generated from a full URL inventory, not rules of thumb
- Metadata and structured data checked page by page before cutover
- Core Web Vitals budgets enforced in the build pipeline
Worth knowing
- Migration pricing is set after the audit, because it depends on content volume, templates, integrations and locales.
- Its service pages cover building, migrating and running sites, not content or link building campaigns.
No. 3
3. Pagepro
- Best for
- Marketing sites moving to Next.js and a headless CMS without losing rankings
- Based in
- London, UK and Białystok, Poland
Pagepro is a Next.js development company with offices in London and Białystok, and an official Sanity and Vercel partner. Its Next.js work covers replatforming, performance and Core Web Vitals optimisation, Vercel hosting and caching, and SLA-backed support after launch, including headless CMS integrations with Sanity and Contentful.
The search angle is built into its own framework, Nexity. Pagepro says redirects and metadata are handled by default, so a replatform does not lose rankings to missed redirects or dropped tags, and it offers a 48-hour live demo built with your real content. Editors are meant to manage content on their own from day one, without raising developer tickets for copy changes.
What stands out
- Official Sanity and Vercel partner
- Redirects and metadata handled by default in its Nexity framework
- Covers performance and Vercel caching as well as the build itself
Worth knowing
- Its Next.js page is about building, replatforming and support. Content, links and ongoing SEO campaigns are not listed there.
- No price is published. Full builds are billed fixed or by milestone, and team augmentation is billed flexibly.
No. 4
4. Webstacks
- Best for
- B2B tech companies moving to a composable stack with SEO designed into the build
- Based in
- San Diego, California, US
Webstacks calls itself the composable web agency and builds sites for B2B tech companies: composable frontends, integrations and CMS setups that marketing teams can run without daily developer support. It is listed as a Platinum partner in Vercel's solution partner directory, and its case studies include moving Gong from WordPress to a composable, Sanity-powered platform.
Its SEO page says search is a first-class constraint in how it structures, designs and builds websites, built in rather than bolted on after launch, so the site gets faster, more crawlable and easier to grow as content scales. The work covers technical SEO, on-page SEO and localisation, and its engineering process runs from architecture planning through QA and launch to operating and improving the site afterwards.
What stands out
- Search treated as a build requirement from the architecture stage
- Platinum partner in Vercel's solution partner directory
- CMS set up so marketers can run the site without daily developer help
Worth knowing
- Its engineering services are pitched at B2B tech companies, so local and small businesses sit outside its usual work.
- No pricing is published.
No. 5
5. Merj
- Best for
- Enterprise teams that need rendering, migration and edge SEO work done by engineers
- Based in
- London, UK
- Founded
- 2015
Merj is a London technical SEO and AEO partner for enterprises, founded in 2015 by Ryan Siddle, and it has some of the strongest Next.js research credentials around. It partnered with Vercel, the company behind Next.js, on a study of how search engines render JavaScript, built on more than 100,000 Googlebot fetches, and its blog covers framework detail such as optimising the Next.js image component for image search.
Its services start from the view that many visibility problems are infrastructure problems: blocked resources, incomplete rendering and slow delivery. The work covers web rendering analysis with a proprietary tool that shows how search engines render your pages, platform migrations and migration recovery, edge SEO deployed through Akamai or Cloudflare, AI search work and a reporting product called MerjIQ.
What stands out
- Co-published JavaScript rendering research with Vercel
- Proprietary tool for checking how search engines actually render your pages
- Edge SEO lets changes ship without waiting on a busy development team
- Says senior people do the work, with no junior hand-offs after the pitch
Worth knowing
- It is built for enterprises and says it works inside your standups, sprints and release cycles, so it suits larger in-house teams more than small businesses.
- No pricing is published.
No. 6
6. Onely
- Best for
- Live JavaScript sites with indexing problems that need a specialist diagnosis
- Based in
- Wrocław, Poland
Onely is a technical SEO agency with a dedicated JavaScript SEO service, which makes it a sensible call when a Next.js site is already live and pages are not getting indexed, or are slow to appear. Its service page splits the work into a JavaScript SEO audit, optimisation of single page apps built on frameworks such as React, Vue and Angular, and AJAX optimisation, with the scope set by the size of the site.
It leans heavily on its own research, and its JavaScript page cites a finding that Google still needs 9x more time to crawl JavaScript-powered websites than plain HTML. The team can also join your internal communication channels, which helps when every fix has to go through your developers.
What stands out
- Dedicated JavaScript SEO service covering audits, single page apps and AJAX
- Research-led, with its own studies on how Google crawls JavaScript
- Works inside your team's channels so developers get fixes directly
Worth knowing
- No fixed price is published. It gives an estimate after a first meeting and a review of your goals.
- Its service page covers auditing and optimising existing JavaScript sites, not designing or building new ones.
No. 7
7. iPullRank
- Best for
- Large sites that want a technical SEO specification written before the build starts
- Based in
- Remote team, US
iPullRank is the agency founded by Mike King, and its technical SEO page says the team has been at the forefront of JavaScript SEO, modern log file auditing, website migrations and complex site architecture builds. For a Next.js project the most useful deliverable it lists is the technical recommendations document: a detailed specification for search visibility that it says is typically used for new websites or experiences, so the rules are set before developers write the templates.
It also offers a full site audit covering technical, content, linking and page speed issues with prioritised fixes, plus a backlink audit. Every deliverable comes with a walkthrough presentation, which helps when the people acting on it are engineers rather than marketers.
What stands out
- Technical specification written for new sites before the build
- Team with a long record in JavaScript SEO, log files and migrations
- Every deliverable walked through with your team in a presentation
Worth knowing
- Its technical SEO page describes audits and specifications, not building the site, so you still need a development team.
- No pricing is published, and its examples lean towards publishers, ecommerce sites and banks with thousands of pages.
How to choose a Next.js SEO agency
Start by working out which problem you actually have. If the site is not built yet, or you are replatforming, you need a team that writes the code with search decided up front, whether that is a build studio or an agency that builds in-house. If the site exists and pages are not indexing, a technical specialist who can show you what Google renders will usually reach the cause faster. Ask either kind to walk you through how they would handle rendering, metadata and redirects on your own templates.
Then think about what happens after launch. A fast Next.js site still needs content, links and someone watching Search Console, and many development studios stop at the handover or the support retainer. If you hire a build partner, decide now who owns rankings and enquiries. Keeping the build and the SEO in one team, or at least making two teams share one set of tracking, saves a lot of arguments later.
Questions to ask before you sign
- Which rendering mode will each of our templates use, and why?
- How will titles, canonicals, hreflang and structured data be generated for dynamic routes?
- Can you show us a redirect map and metadata check from a past migration?
- Who can edit SEO fields and add redirects once the site is live?
- What tracking will be in place on launch day, and who reports on enquiries after that?
Frequently asked questions
Is Next.js good for SEO?
Yes, when it is set up properly. Next.js can render pages on the server or at build time, so search engines get full HTML quickly. The problems come from choices made in the build: content that only appears after client-side JavaScript runs, missing or duplicated metadata on dynamic routes, broken redirects after a migration, and caching that serves stale pages.
What does a Next.js SEO agency do?
A Next.js SEO agency either builds Next.js sites with search handled in the code, or audits existing ones for rendering, indexing, metadata and performance problems. The better ones carry on after launch with content, links and reporting, or work closely with whoever does.
Does Google render JavaScript on Next.js sites?
Google does render JavaScript, but it takes more effort than plain HTML. Merj's research with Vercel, based on more than 100,000 Googlebot fetches, looked at exactly this, and Onely's research says Google still needs 9x more time to crawl JavaScript-powered sites. Server or static rendering for your important pages removes most of the risk.
Should I move my WordPress site to Next.js for SEO?
Only if you have a real reason, such as speed, design limits or a headless setup you need. A move to Next.js is a migration, and rankings drop when redirects, metadata or internal links are missed. If you go ahead, budget for a URL inventory, a 301 map and monitoring after launch, and keep the CMS easy for your team to use.
How much does a Next.js SEO agency cost?
It depends on whether you need a build, a migration, an audit or ongoing SEO, and most studios and technical specialists on this list price after an audit or discovery call. SEO Engico publishes its rates, with ongoing SEO on a $4,500 a month Growth retainer after a 30-day Revenue Baseline at $3,499.
Our verdict
Pick SEO Engico if you want one team to build the Next.js site, set up tracking before launch and run the SEO and links afterwards, with published rates and its Entour rebuild as proof. Choose Bejamas or Pagepro for a large headless replatform led by engineers, Webstacks for a B2B tech site on a composable stack, Merj for enterprise rendering and edge SEO work, iPullRank for a technical specification before the build, and Onely when a live JavaScript site has indexing problems that need a specialist diagnosis.
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