7 Best B2B SEO Agencies for 2025 [By Category]

Choosing the right B2B SEO agency is an important decision for driving qualified lead and revenue growth.

However, not all SEO agencies are created equal. Some specialize in certain service areas, while others target specific industries and company sizes.

The best B2B SEO agencies can create strategies that account for longer sales cycles, multiple stakeholders and more complex search behaviors.

This guide will look at seven leading B2B SEO agencies. For each agency, we'll provide a company overview, explore their strengths, SEO services offered, notable clients and case studies.

This analysis will ensure you have the information needed to choose the right SEO agency for your business.

We selected agencies based on their B2B expertise, client success stories, and ability to drive measurable business outcomes.

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1. Virayo - Best B2B SaaS SEO Agency

Clutch rating: 4.8/5 (11 reviews)

B2B SEO clients include: Sprout Social, MYOB, Truckstop, Brandfolder, ForUsAll, OnFleet, Cedreo, SPOTIO, and CareAcademy

Founded in 2012 and headquartered in Boise, Virayo is a specialized B2B SaaS SEO agency that has helped growth-stage software companies generate thousands of SQLs and millions in new ARR.

We have built a strong reputation for delivering data-driven SEO strategies that impact pipeline and revenue growth. This is evidenced in the case studies below.

While Virayo provides many of the standard SEO services offered by other agencies, it is also at the forefront of AI and helps clients adapt their strategies to navigate zero-click SERPs and increase visbility across AI-powered conversational search engines such as ChatGPT, Gemini and Perplexity.

Robbie Richards, the company's lead SEO strategist, regularly shares LinkedIn content about AI in search and strategies SaaS companies can use to boost visibility and grow pipeline.

B2B SEO services offered:

• End-to-end SaaS SEO:
  • SEO strategy
  • AIO and LLM strategy
  • Technical audits
  • Content audits
  • Keyword strategy
  • Content strategy
  • Content production
  • Link building
  • Analytics and reporting
  • Quarterly SEO reviews (QSOs)
• Agentic AI workflows for SEO campaigns

Client results:

Virayo’s SEO campaigns have helped B2B SaaS brands increase organic traffic, SQLs and revenue.

• SPOTIO generated 1,700+ demos and $2.8M in new ARR from organic search
• ForUsAll grew monthly SQLs from 20 to 120 while reducing ad spend by 90%
• Cedreo grew organic traffic from 6,000 to 70,000+ monthly visitors and 7x'd monthly trial signups

Testimonials:

“Organic search traffic has become our leading source of new sales pipeline, driving 48% of inbound Sales Qualified Leads.” - Jamison Moore, Demand Generation Manager at SPOTIO

“Over the last two years, Virayo has helped grow our organic traffic from around 6,000 organic visits per month to over 70,000 organic visits per month. More importantly, organic traffic is now the number one driver of new trial signups for our business.” - Charlotte Morineau, CMO at Cedreo

“In less than a year, Virayo has helped ForUsAll 6x the number of qualified leads from organic search, which has allowed us to reduce paid ad spend by 90% compared to a year ago.” - David Ramirez, CEO at ForUsAll

Virayo has become a go-to agency for B2B SaaS brands looking to increase pipeline and  adapt their SEO strategy amidst constant AI disruption.  

If you’re a B2B SaaS company searching for an SEO partner who understands your industry, how to adapt for AI and LLMs, and delivers revenue-first strategies, book a strategy call with us today.

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2. Sure Oak - Best for B2B Growth Strategy

Clutch rating: 4.8/5 (31 reviews)

B2B clients include: ZenPack, Novarad, Easy Ringer, Rec Solar, Guidepoint Security

Agency overview: Founded in 2017 and headquartered in Brooklyn, Sure Oak is a boutique growth-focused B2B SEO agency that helps companies achieve long-term, sustainable organic growth.

With a small team of 14, Sure Oak focuses on partnering with growth-minded brands that want a boutique experience.

The agency was named one of Clutch's Top SEO Companies in 2021 and recognized as a leading B2B company in New York City.

B2B SEO services offered:‍

• B2B SEO strategy
• Keyword and audience research
• Content optimization and SEO copywriting
• Conversion optimization
• Content strategy
• Technical SEO audits
• Site Audits

Agency strengths: Sure Oak focuses on long-term, results-driven strategies, combining technical expertise, creative content, authoritative link building, and a consultative approach. Their versatile experience and credibility have attracted clients ranging from startups to renowned brands like Mercedes-Benz and the American Red Cross, who trust Sure Oak to boost their search rankings and ROI.

For example, the agency helped a Your Money, Your Life (YMYL) eCommerce client recover from a Google algorithm hit and increase revenue by $200,000 through a strategic SEO recovery plan.

The SEO strategy focused on:

• Recovering lost rankings and organic traffic post-Google update
• Improving content quality and trust signals for YMYL standards
• Building high-authority links to reinforce search credibility

Results achieved:

• 29% increase in organic sessions within 6 months
• 35% increase in new organic users
• 1,200+ more organic transactions

Check out the complete case study: Sure Oak YMYL Recovery

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3. Siege Media - Best for B2B Content Strategy

Clutch rating: 4.9/5 (45 reviews)

B2B clients include: Airbnb, Asana, Figma, HubSpot, Zillow, Adidas

Founded in 2012, Siege Media specializes in content-driven SEO for B2B brands, combining high-quality content production with data-backed SEO strategies to drive measurable organic growth.

Siege Media's team of just under 100 employees is now fully remote, despite maintaining a presence in Austin, San Diego, and New York.

The agency’s tagline, “We drive organic growth with SEO, content marketing and PR,” encapsulates their approach.

Siege Media has been honored on the Inc. 5000 list six years running, reflecting its fast growth and solid client retention

B2B SEO services offered: 

• SEO-focused content marketing
• Data-driven keyword research and strategy
• Link building campaigns for authority growth
• Graphic design and interactive content
• Digital PR and content promotion

Agency strengths: Siege Media is a leader in content-led SEO, helping B2B brands turn content into a primary lead-generation channel. Their content frameworks and SEO expertise allow them to create high-ranking, high-converting assets tailored for B2B audiences.

Siege typically partners with high-growth and enterprise brands, especially in SaaS and tech, demonstrating their ability to deliver at scale. Their work with brands like Intuit (QuickBooks), Zendesk, and Zillow highlights their expertise in competitive SEO niches and large-scale content projects.

One standout success story is Figma, the popular design software company. Siege Media helped Figma build a high-impact content hub that significantly improved organic search performance.

Results achieved:

• 2,065% increase in organic traffic to Figma’s Resource Library
• 93% of content ranking on page 1 for target keywords
• 10,166,690 organic impressions from created content
• $529,681 increase in estimated organic traffic value

By executing strategic content planning and optimization, Siege Media turned Figma’s blog into a high-authority search destination, driving both brand awareness and product sign-ups.

Check out the complete case study: Figma Content Marketing Success

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4. Directive Consulting - Best for B2B Enterprise SEO

Clutch rating: 4.8/5 (56 reviews)

Clients include: Amazon, Uber Freight, Snap Inc., Calendly, Adobe, WordPress, Samsung

Founded in 2013, Directive Consulting is a B2B marketing agency specializing in sustainable growth for tech companies, particularly in B2B SaaS, software, and enterprise technology. Founded in 2014, Directive developed the "Customer Generation" methodology, which moves marketers beyond vanity metrics like rankings and traffic toward meaningful pipeline growth and revenue.

With headquarters in California (Irvine) and a 100+ strong team across North America and Europe, Directive has served 420+ brands worldwide.

B2B services offered:

• Enterprise SEO strategy and execution
• Performance-driven PPC campaigns
• Demand generation for B2B growth
• Full-funnel content marketing
• Link building and digital PR
• Go-to-Market strategy consulting
• Conversion rate optimization
• Analytics and pipeline reporting

Agency strengths: Directive Consulting is known for its high-impact SEO and demand generation strategies tailored for B2B enterprise brands.

Their proprietary Customer Generation framework moves beyond rankings, focusing on converting organic traffic into qualified pipeline opportunities.

In practice, this means Directive aligns SEO and content strategies closely with sales objectives. Specifically, mapping keywords to intent stages, creating content for both awareness and conversion, and integrating SEO with paid campaigns for full-funnel influence.

An example of this is their work with Seagate, a global data storage solutions provider.

Directive helped Seagate dominate high-value enterprise search queries by combining strategic content creation, advanced keyword targeting, and technical SEO improvements.

Results achieved:

• 75% increase in organic traffic to Seagate’s blog
• 50.6% improvement in the average ranking position for core keywords
• 45.2% increase in organic traffic to targeted content segments

Directive’s full-funnel SEO methodology ensured that organic traffic translated into measurable business outcomes, positioning Seagate as a leading authority in enterprise data solutions.

Check out the complete case study: Seagate SEO Success

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5. OuterBox - Best B2B E-commerce SEO Agency

Clutch rating: 5/5 (61 reviews)

Clients include: Embrace Pet Insurance, Epicor, JEGS, Sur La Table, Lowe's, Crayola

Founded in 2004, OuterBox is a leading B2B SEO agency operating in Houston, Akron, and Rochester.

The agency specializes in B2B e-commerce growth by increasing organic sales, lead generation, and search visibility for businesses selling through online platforms.

OuterBox has an in-house team of over 250 professionals including SEO specialists, developers, designers, copywriters, and CRO experts.

B2B SEO services offered:

• Full-stack E-commerce SEO services
• Custom B2B SEO strategy
• Content production and optimization
• Technical SEO audits
• Conversion rate optimization (CRO)
• Custom web design and development
• Analytics, tracking and reporting

Agency strengths: OuterBox is recognized for its e-commerce-focused SEO strategies, helping B2B businesses increase product visibility and sales.

Their expertise spans platforms like Magento, Shopify, and WooCommerce, making them a go-to partner for B2B brands looking to dominate search results.

Their work focuses on technical site optimizations, category page SEO, and transactional keyword targeting to drive organic revenue growth.

​​One example of their success is their work with Rapid Rivets and Fasteners, a B2B supplier specializing in industrial fastening solutions.

OuterBox developed an intent-driven content strategy to enhance organic rankings, improve search visibility, and drive more qualified leads.

Results achieved:

• 216% increase in website traffic within six months
• 155% rise in site conversion events
• 6,441 website visits to new content

By leveraging SEO-driven content marketing and site architecture improvements, OuterBox transformed the company’s search presence into a high-performing lead generation channel.

Check out the complete case study: Rapid Rivets and Fasteners SEO Success

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6. Straight North - Best For Multi-Location SEO

Clutch rating: 4.7/5 (128 reviews)

Client include: Affy Tapple, Clover, DFIN, University of Wisconsin Platteville, Aledade

Founded in 1997 in Chicago, Straight North is a full-service B2B SEO agency that specializes in national SEO campaigns for companies targeting customers across multiple locations and industries.

Their motto, "We Work Hard to Make You Look Good," reflects a client-centric approach. With a team of 100+ experienced marketing specialists and a data-driven culture, Straight North consistently delivers tangible growth for B2B clients.

B2B services offered:

• National and multi-location SEO
• PPC management and lead generation
• Website design and development
• Creative services

Agency Strengths: With 25+ years experience, they've been optimizing websites since the AltaVista days, giving them unmatched perspective and expertise.

The company's approach to SEO combines strategic keyword targeting, technical optimizations, and lead generation tactics to improve search rankings and conversion rates.

One example of their success is their work with Acieta, a national provider of industrial robotic automation solutions.

Results achieved:

• 1,200% increase in lead volume
• 95% increase in organic search traffic
• Over 30% reduction in cost per lead

Check out the complete case study: Acieta National SEO Success

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7. WebFX - Best for Full-Funnel B2B Marketing

Clutch rating: 4.9/5 (397 reviews)

Clients include: Verizon, Fuji Film, Hilton, Subway, O'Reilly Auto Parts

Founded in 1995 in Harrisburg, WebFX is a data-driven digital marketing agency that specializes in full-funnel B2B SEO strategies.

With a team of over 500 marketers, WebFX helps B2B companies attract, engage, and convert leads through a combination of SEO, content marketing, and paid media.

B2B services offered:

• SEO strategy and execution
• PPC and paid advertising
• Content marketing and lead generation
• Social media marketing and automation
• Email marketing and CRM integration
• Web design and development
• Data-driven conversion optimization

Agency strengths: WebFX is known for its investment in technology to improve SEO campaign performance. Their MarketingCloudFX platform is a game-changer. It integrates AI and big data to track campaigns in real-time and extract insights - like which keywords are driving the most revenue - that can be used to scale the ROI of your SEO efforts.

One example of their success is their work with Kampgrounds of America (KOA), where they implemented an integrated SEO and conversion optimization strategy that increased organic revenue.

Results achieved:

• 260% increase in organic revenue
• 198% growth in organic transactions
• 150% rise in organic traffic
• 160% increase in new users from organic search
• 15% improvement in organic conversion rate

By combining SEO, content strategy, and conversion rate optimization, WebFX helped KOA scale its online presence and drive substantial revenue growth.

Check out the complete case study: KOA SEO Success

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How to choose the right B2B SEO Agency

Choosing the right B2B SEO agency is a critical decision that can impact long-term search visibility and pipeline growth.

A strong agency should align with your business goals, industry needs, and budget, while delivering measurable results.

Here are four key factors to consider when making your decision.

Industry Fit: Does the Agency Specialize in B2B SEO?

B2B SEO differs fundamentally from B2C SEO. While consumer-focused strategies target high-traffic keywords, B2B SEO supports longer sales cycles, multiple stakeholders, and complex buying decisions.

When evaluating agencies, ask:

• Does the agency have proven experience in your industry (e.g., SaaS, ecommerce, manufacturing, technology)?
• Do they have industry-specific case studies?
• Do they specialize in your market segment (mid-market, enterprise, SMB)?

Proven Results: Can The Agency Deliver Real Business Impact?

A great agency does more than rank websites. It generates qualified leads, sales, and revenue. Reviewing case studies and client testimonials can help you determine if an agency delivers meaningful business results.

Look for agencies that can answer:

• What tangible results (traffic growth, lead generation, revenue) has your agency generated?
• What case studies are relevant and aligned with your business goals?

For example, some agencies featured in this guide, like Virayo, have helped clients achieve triple-digit increases in lead volume and multi-million-dollar ARR growth through SEO.

Budget vs. Value: Are You Investing in the Right Level of SEO?

SEO pricing varies significantly, and higher costs don't always guarantee better results. Before committing, consider these factors:

• Does pricing align with your budget and investment expectations?
• What’s your primary SEO goal? Brand awareness, demand generation, or direct sales?
• Are their case studies that demonstrate of a strong ROI relative to their fees?
• How does the agency structure its pricing? Retainers, project-based, or performance-driven?
• What’s included in the package? Will you need additional PPC, content marketing, or CRO services?

Scope of SEO Services: Can the Agency Do What You Need?

Ensure the agency can fill the skills gaps of your company. Look for the following competencies:

• SEO strategy
• AI and LLM strategy
• Technical SEO
• Keyword strategy
• Content strategy
• Content production
• Link building
• Analytics and reporting

Note: it's important to work with an agency that can help your business adapt its SEO strategy to AI and shifting search behaviors.

Our SEO strategist, Robbie Richards, talks more about this in this LinkedIn post.

Service Flexibility: Do You Need a Full-Service or Specialized Agency Partner?

Some agencies provide full-service digital marketing, while others focus exclusively on SEO. Your choice should depend on:

• Whether you need a dedicated SEO agency or broader digital marketing support
• If you have in-house SEO expertise or need a partner that handles everything
• Whether the agency offers customized strategies or one-size-fits-all solutions

If you already have an in-house content team, for example, an agency that specializes in technical SEO and link building might be a better fit than one that focuses only on content production.

Thought Leadership and Innovation

SEO is changing faster than ever. You need to evaluate whether or not the agency is on top of AI updates and changing LLM search behaviors.

• Does the agency stay up-to-date with SEO trends, algorithms, and AI updates?
• Do they share insights, resources, and content demonstrating expertise and thought leadership?
  

Book Discovery Calls to Find the Right Fit

A strong partnership starts with a conversation. Most agencies offer free strategy calls where you can assess:

• The agency’s communication style and transparency
• Whether they understand your business model and goals
• Whether they have experience working with your type of business
• If the agency has generated real business value for its clients
• If the agency can help adapt your strategy to AI disruption
• If the agency is a good-fit for your needs

Ultimately, the right B2B SEO agency should deeply understand your ICP, product or service, and act as a strategic growth partner.

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Final Thoughts

Choosing the right B2B SEO agency means finding a partner who understands your business goals, can attract qualified leads, and consistently grow organic traffic and revenue. The agencies above each bring proven expertise, from specialized industry experience to content strategy and end-to-end SEO services.

If you're a B2B SaaS company ready to generate more pipeline and revenue from organic search, Virayo can help. Our strategies focus on real business results, not just rankings. Schedule a strategy call to see how we can help grow your business.