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If you’re aiming to boost your website’s visibility and climb the search engine rankings, effective link building is essential. With search algorithms becoming more sophisticated, securing high-quality backlinks from reputable sources is more crucial than ever. Whether you’re a business owner, marketer, or SEO professional, partnering with the right link building agency can make all the difference.
To help you navigate the options, we’ve compiled a list of the top link building agencies and services that stand out. These agencies have proven track records, offer diverse services, and cater to various industries and budgets.
| Rank | Agency Name | Specialisms | Clients | Office Location |
| 1 | Koozai | Digital PR, SEO, Content Marketing | Travelbag, Boring Money, MyHealthcare Clinic, TUI | Southampton, London, Preston |
| 2 | Siege Media | Content Marketing, SEO, Link Building | Zillow, Intuit | Remote (USA-based) |
| 3 | uSERP | SaaS Link Building, Content Marketing | monday.com, Freshworks | Denver, CO, USA |
| 4 | Page One Power | Custom Link Building, Content Creation | AARP,QuickBooks | Boise, ID, USA |
| 5 | Editorial.Link | SaaS Link Building, White-Hat SEO | Various Tech Companies | Tallinn, Estonia |
| 6 | UK Linkology | Manual Outreach, Content Creation, Link Audits | Various UK Businesses | Lincoln, UK |
| 7 | Rhino Rank | Guest Posts, Niche Edits, Link Audits | Various Niche Sites | London, UK |
| 8 | Rock The Rankings | B2B Link Building, SEO Strategy | SaaS and Tech Companies | Chicago, IL, USA |
| 9 | LinkDoctor | Transparent Link Building, SEO Consulting | Various Global Brands | Sheridan, WY, USA |
| 10 | Digital Olympus | Relationship-Based Link Building, Digital PR | G2, edX | Remote (Global) |
| 11 | PosiRank | Fully Managed SEO, High-Quality Link Building | Various Industries | Annapolis, MD, USA |
| 12 | Verve Search | Creative Digital PR, SEO, Content Marketing | BBC, Canva | London, UK |
| 13 | The Brains Marketing | SEO, Link Building, Content Marketing | Various UK Businesses | London, UK |
Established in 2006, Koozai is a multi-award-winning digital marketing agency renowned for its comprehensive suite of services. Their link building strategies are rooted in quality and relevance, focusing on securing backlinks from authoritative and topically relevant websites. Koozai’s experienced in-house team of digital PR experts and SEO outreach specialists have successfully executed campaigns across various industries, including construction, finance, hospitality, healthcare, travel, motoring, retail, and e-commerce.
Koozai’s approach blends traditional link building techniques with innovative digital PR campaigns, ensuring that clients receive backlinks that genuinely impact their SEO performance. Their services encompass:
Trusted by clients including Travelbag, Boring Money, Cofton Holidays, and MyHealthcare Clinic, Koozai has demonstrated its ability to deliver results that matter.
Siege Media is a content marketing agency that excels in creating link-worthy content. Their team specialises in producing high-quality, SEO-optimised content that naturally attracts backlinks. By focusing on content that resonates with audiences, Siege Media helps clients like Zillow and Intuit improve their online visibility and authority.
uSERP is a link building agency that focuses on SaaS companies, helping them secure high-authority backlinks through strategic outreach and content marketing. Their clients include notable names like monday.com and Freshworks. uSERP’s approach is data-driven, ensuring that each backlink contributes to the client’s overall SEO strategy.
With a decade of experience, Page One Power offers custom link building strategies tailored to each client’s unique needs. They emphasise building links that are relevant and valuable, enhancing the client’s search engine rankings and online presence. Their client list includes AARP and QuickBooks.
Editorial.Link specialises in link building for SaaS and tech companies. They focus on securing high-quality backlinks through editorial placements, ensuring that each link is contextually relevant and valuable. Their approach is tailored to each client’s industry and goals, making them a trusted partner for businesses looking to enhance their online authority.
UK Linkology specialises in manual outreach and content creation to secure high-quality backlinks. They offer comprehensive link audits to identify and rectify issues, ensuring that clients’ backlink profiles are healthy and effective.
Rhino Rank offers guest posts and niche edits, helping clients acquire contextually relevant backlinks. Their services are designed to improve search engine rankings by building a strong and diverse backlink profile.
Rock The Rankings specialises in B2B link building and SEO strategies, particularly for SaaS and tech companies. They focus on creating customised campaigns that drive inbound leads and improve search engine visibility.
Digital Olympus is a relationship-based link building agency that emphasises ethical practices and long-term results. They specialise in securing editorially placed backlinks within existing content on reputable websites, ensuring that each link adds genuine value. Their approach avoids paid or sponsored links, aligning with Google’s guidelines for sustainable SEO growth.
LinkDoctor promotes themselves as a link building company offering transparent reporting and a personalised approach to every project. They offer link building and SEO consulting services to grow traffic and conversions across the board.
PosiRank offers fully managed SEO services with a strong focus on high-quality link building. Their team ensures that all backlinks are placed on fully vetted, high-authority websites, contributing to improved search engine rankings. PosiRank’s services are designed to be scalable and effective, catering to businesses of various sizes and industries.
Verve Search is an award-winning digital PR agency based in London, known for creating brand-relevant, audience-first content that earns high-quality backlinks. Their creative campaigns have secured coverage in top-tier media outlets, enhancing clients’ online visibility and authority.
With a client list featuring notable brands like BBC and Canva, Verve Search has demonstrated its ability to deliver impactful link building campaigns.
The Brains Marketing is a London-based digital marketing agency specialising in SEO and link building. Their data-driven strategies focus on acquiring high-quality backlinks from reputable websites within clients’ niches. By combining technical expertise with creative content, The Brains helps businesses improve their domain authority and search engine rankings.
AI-powered search and results are showing up more and more these days. These AI systems rely heavily on authoritative content and credible backlinks to determine the relevance and trustworthiness of a website. Therefore, having a robust link building strategy is more important than ever. At Koozai, we understand that AI Overviews are influenced significantly by owned content (your website) and PR articles. By securing high-quality backlinks through white-hat techniques, we help ensure that your content is recognised and prioritised by AI-driven search algorithms.
When auditing previous digital PR work, undertaken by other agencies, we often encounter several common mistakes:
Make sure when you’re selecting a link building agency that they won’t make these same mistakes.
Link building involves acquiring hyperlinks from other websites to your own. These backlinks are crucial for SEO as they signal to search engines that your site is authoritative and trustworthy, which can improve your search rankings.
Consider factors like the agency’s experience, client testimonials, transparency in reporting, and the relevance of their services to your industry. It’s also essential to ensure they use ethical, white-hat link building techniques.
White label link building services are provided by agencies that allow other companies to resell their services under their own brand. This is particularly useful for agencies that want to offer link building without handling the execution themselves. Be cautious with white label link building agencies, whilst this can sound convenient, you often don’t know who’s actually doing the work. That lack of transparency can seriously backfire if quality or ethics aren’t up to par.
Costs vary depending on the agency, the quality and quantity of links, and the specific services offered. Prices can range from a few hundred to several thousand pounds per month.
No honest link building SEO agency will guarantee specific rankings because search algorithms are complex and constantly changing. But what the best link building agencies do offer is a proven track record of improving authority, referral traffic, and ranking stability through consistent, white-hat strategies. That’s what really matters in the long run.
Not even close. Quality always beats quantity. One link from a topically relevant, authoritative source is worth far more than dozens of spammy directory links. That’s why working with a reputable link building service provider, one that focuses on editorial relevance, organic outreach, and trusted domains, is so important.
A link building company often focuses solely on backlinks, while a top digital PR agency17 Best Digital PR Agencies in the UK 2025 (like Koozai) uses media relationships and storytelling to secure high-quality, on-brand links. When done right, digital PR becomes one of the most effective outreach link building services, offering not only backlinks, but also brand mentions, referral traffic, and visibility across national media.
AI search tools (like ChatGPT or Google’s Search Generative Experience) pull from trustworthy and authoritative sources. That means links from credible media outlets and high-ranking blogs send strong signals to AI systems that your site is a reliable source. A strong backlink profile, especially to commercial pages, can help your brand show up in AI overviews, citations, and summaries.
Look for an agency that:
Avoid:
Link building isn’t just about volume. It’s about strategy, relevance, and consistency.
Whether you’re comparing the best link building services, looking for quality link building services for SEO, or need a white label link building service that scales, the agencies listed here have been selected for their strong track records and ethical practices.
But let’s be clear: not all link building companies are created equal. Many still use outdated, black-hat techniques. Some target vanity URLs or build links without a clear SEO plan.
At Koozai, we’re proud to be a link building agency that gets results the right way, using proven strategies backed by real SEO and PR experience.
We focus on:
Because when SEO and PR work together, that’s when you see real impact.
If you’re ready to work with a link building SEO agency that cares about long-term performance, why not give us a shout? We’ll be happy to audit your existing links, help you build a solid strategy, and start earning coverage (and links) you can be proud of.
If you want help with a link building audit or need to chat about your SEO services link building strategy let’s talk, we’re always happy to help.
If you need a hand choosing the best digital marketing agency, a top seo agency uk or paid media agency for your needs we can help there too. We can answer questions about how to select good SEO agency or if you specifically want an agency that specialises in Hospitality, Leisure, Travel and Tourism for instance.
