Top B2B SaaS SEO Agencies: 2023

In this article, we have compiled a list of the top B2B SaaS SEO agencies in 2023. Each of the agencies on this list has a proven track record of using SEO as an effective part of a customer acquisition strategy for B2B SaaS companies.

The table below ranks agencies, based on the type of SEO services they provide, clientele, years in business, and a leadership experience factor that summarizes the company’s impact on the evolution of the digital marketing industry. 

The Top B2B SaaS SEO Agencies of 2023

Rank Company Notable Clients Leadership Experience Company Size Year Founded Headquarters Main Focus
1 First Page Sage Salesforce, Cadence Design Systems, Equinix, Verisign  4.9 100-250 2009 San Francisco, CA Combining SaaS thought leadership and SEO for lead generation
2 Epsilon CDW, Faraday 4.7 500-1000 1969 Irving, TX Full service marketing for SaaS enterprises
3 Clay Agency Slack, Zenefits, Hint 4.5 11-50 2016 San Francisco, CA CRO and UX optimization for SEO
4 TOP Agency 15Five, Appvance, Freshbooks 4.5 150-200 2018 Austin, TX Targeted message creation for SEO
5 Marketing Eye Construx Solutions, Innovent CRM, JESI 4.4 11-50 2004 Atlanta, GA Technical SEO and web design for SaaS companies
6 REQ Katabat, Verint, ActiveNav 4.3 51-100 2008 Washington, DC Branding and UX focused SEO
7 Kalungi Zippity, Beezy, Arrowstream 3.8 51-100 2018 Seattle, WA Fractional SEO team for B2B SaaS companies
8 Metric Theory Zenefits, Optimizely, Zuora 3.7 101-250 2012 San Francisco, CA Combined SEO & paid search
9 RNO1 Prive, TakeUp, Fluxa 3.6 51-100 2018 Seattle, WA Market research and UX design for SaaS startups

First Page Sage

First Page Sage combines SEO with industry-leading thought leadership to provide both demand generation and lead generation for their B2B SaaS clients. They position companies as leading industry authorities, helping them grow organic traffic and generate high value leads. 

  • Year Founded: 2009
  • Company Size: 100-250
  • Headquarters: San Francisco, CA
  • Additional Services: Thought Leadership, Web Design, Conversion Rate Optimization, Paid Search
Summary of Online Reviews
First Page Sage is known as an industry leader that “provides excellent ROI on campaigns”. The company is also well-known for exhibiting marketing “intelligence, experience, and expertise” while providing clients with “an incredible personal touch“, but results can sometimes be slow to start.


Epsilon is a full-service marketing company that provides SEO services for B2B SaaS enterprises. Over the past several decades, the company has established themselves as highly skilled marketers that offer a broad range of services, allowing clients with complex vendor vetting processes to unify their marketing needs under a single roof.

  • Year Founded: 1969
  • Company Size: 500-1000
  • Headquarters: Irving, TX
  • Additional Services: Digital Media, Data Solutions, Customer Insights
Summary of Online Reviews
Although a very experienced company, Epsilon has impressed clients for being “exceptionally responsive to feedback” and willingly “making revisions, feature improvements, and functional changes” when necessary to maximize success for clients.

Clay Agency

Clay Agency focuses its efforts on helping SaaS companies maximize their conversion rates through UI/UX design and brand strategy. They are a good fit for B2B SaaS companies that have strong existing organic traffic, but see few organic leads. 

  • Year Founded: 2016
  • Company Size: 11-50
  • Headquarters: San Francisco, CA
  • Additional Services: UI/UX Design, Product and Brand Strategy
Summary of Online Reviews
“Collaborative and highly engaged” is how the Clay Agency is described. The agency has impressed clients by establishing a relationship that one describes by saying “they truly cared about the product and its design as much as we did.”

TOP Agency

The TOP Agency champions a data-driven approach to marketing, and have worked with high-profile B2B SaaS companies such as Microsoft and Freshbooks. They have a strong commitment to continuous testing and feedback implementation, and focus primarily on the creative and branding side of SEO.

  • Year Founded: 2018
  • Company Size: 150-200
  • Headquarters: Austin, TX
  • Additional Services: Logo Design, Marketing Communication, Market Research
Summary of Online Reviews
The TOP Agency is described as being “really good at what they do” and delivering “significant results.

Marketing Eye

Marketing Eye works primarily with smaller B2B SaaS businesses, providing strategic consulting and technical SEO services. They are a strong choice for companies with existing in-house content teams, or those that don’t yet need a full suite of marketing services.

  • Year Founded: 2004
  • Company Size: 11-50
  • Headquarters: Atlanta, GA
  • Additional Services: Marketing Automation, Marketing Consulting, Web Development
Summary of Online Reviews
The Marketing Eye team has been lauded for producing “creative and original content.” The company also impresses clients by being “passionate at what they do.


REQ blends traditional advertising with SEO services, helping B2B SaaS clients build a strong brand identity. They work best with well-established companies, offering a full suite of digital marketing services, and their pricing often puts them out of reach for small startups.

  • Year Founded: 2008
  • Company Size: 51-100
  • Headquarters: Washington, DC
  • Additional Services: PR, Branding, Advertising
Summary of Online Reviews
REQ places a premium on client relations and have been described as “a true partner” that is like a “part of our team rather than just an agency we’re working with.”  


Kalungi helps SaaS companies grow by providing fractional SEO marketing services. This strategy, which they call growth-as-a-service, helps their clients fill marketing roles with s skills short-term, or complete a team for a longer project.   

  • Year Founded: 2018
  • Company Size: 51-100
  • Headquarters: Seattle, WA
  • Additional Services: Fractional Marketing Teams, SaaS CMO Coaching
Summary of Online Reviews
Kalungi has helped clients “create sustainable workflows and marketing campaigns.” They have also helped clients to gain “confidence in the reports and data” acquired from marketing tools. 

Metric Theory

Metric Theory combines SEO and digital advertising, using remarketed display ads to create multiple touchpoints that increase the likelihood of a visitor converting to a lead. While effective, their focus on paid channels can lead to lower long-term ROI than other SEO agencies in this report.

  • Year Founded: 2012
  • Company Size: 101-250
  • Headquarters: San Francisco, CA
  • Additional Services: SEO, Paid Search, Remarketing & Display Ads
Summary of Online Reviews
Clients of Metric Theory describe teams as “effective communicators and researchers” with everyone being “an expert in their own lane” that “can see the big picture.” 


RNO1’s specialty is market research and branding for B2B SaaS clients, helping them create unique visual identities and digital experiences to leave lasting impressions. Their work emphasizes design, and they work primarily with startups that focus on Web3.

  • Year Founded: 2018
  • Company Size: 51-100
  • Headquarters: Seattle, WA
  • Additional Services: Brand Strategy, UI/UX Design, VR & AR Design
Summary of Online Reviews
RNO1 has been successful in “increasing web traffic” and improving client “user experience.” They have also been noted for their customer attentiveness, with one client noting “I felt like I was really their only client the whole time.”


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