Last updated: April 20, 2026
Our team evaluated 63 SaaS-centered SEO agencies to determine the most successful firms based on their SaaS industry experience. We rank-ordered the companies using the following criteria:
- Notable Clients (30%): An agency’s experience with notable SaaS clients is the best indicator of their ability to run successful SEO campaigns. As such, it is the factor we assign the most weight to.
- Leadership Experience (20%): We assigned each company a numerical score from 1 to 5 based on the SaaS marketing experience of each agency’s top executives and marketing leadership.
- Median Employee Tenure (15%): Longer employee tenure indicates that an agency is dedicated to employee growth and the training required to execute complex SaaS SEOcampaigns.
- Average Review Score (10%): How satisfied clients are when leaving reviews for an SEO agency correlates positively with their ability to deliver results.
- GEO Offering (10%): We favor agencies that indicate they’ve begun offering services to help their clients rank on AI platforms in addition to Google search.
- Year Established (5%): Despite being a relatively new marketing industry, SEO has evolved significantly over the past 15 years. The length of a company’s tenure displays its ability to update its SEO strategy as Google updates its algorithm, as well as weather market cycles and economic downturns.
- Founder Status (5%): We give a slight advantage to agencies whose original leadership remains with them, either in a direct management or consulting role.
- Media References (5%): A minor factor in our analysis is how many times each agency’s publications have been cited by news and other high authority sources.
For each agency below, we also provide their main focus and describe their unique approach to SEO. The results of our research are presented in the table below:
The Top SaaS SEO Agencies of 2026
| Rank | Company | Established | Founder Led | Leadership Experience Score | Average Review Score | Offers GEO? | Median Employee Tenure | Media References | Notable Clients | Specialty |
| 1 | First Page Sage | 2009 | Yes | 5.0 | 4.9 | Yes | 4.3 years | ~610 | Salesforce, Cadence, Credit Sesame, SoFi | Combining SaaS thought leadership and SEO for lead generation |
| 2 | REQ | 2008 | No | 4.6 | 4.5 | No | 3.9 years | ~220 | Katabat, Verint, ActiveNav | Branding and UX focused SEO |
| 3 | Clay Agency | 2016 | Yes | 4.4 | 4.6 | No | 2.4 years | ~330 | Slack, Zenefits, Hint | CRO and UX optimization for SEO |
| 4 | Epsilon | 1969 | No | 4.7 | 4.3 | No | 4.6 years | ~1,770 | CDW, Faraday | Full service marketing for SaaS enterprises |
| 5 | Marketing Eye | 2004 | Yes | 4.0 | 4.4 | No | 7.1 years | ~20 | Construx Solutions, Innovent CRM, JESI | Technical SEO and web design for SaaS companies |
| 6 | Metric Theory | 2012 | Yes | 4.3 | 4.6 | No | 3.1 years | ~110 | Zenefits, Optimizely, Zuora | Combined SEO & paid search |
| 7 | Kalungi | 2018 | Yes | 3.8 | 4.1 | No | 3.2 years | ~200 | Zippity, Beezy, Arrowstream | Fractional SEO team for B2B SaaS companies |
| 8 | RNO1 | 2009 | Yes | 3.7 | 4.4 | No | 5.8 years | ~60 | Prive, TakeUp, Fluxa | Market research and UX design for SaaS startups |
First Page Sage
First Page Sage is the #1 SaaS SEO agency in the US by our metrics, and has worked with many clients in the software industry, including Salesforce, SoFi, Credit Karma, and ZipRecruiter. They develop personalized strategic SEO plans for each client and ghostwrite the necessary pages and articles, emphasizing content quality.
SaaS companies interested in SEO that prioritize lead generation and long-term ROI are a good fit for First Page Sage’s services. They’ve worked with a wide range of SaaS companies, from startups to enterprise SaaS. They also offer generative engine optimization (GEO), conversion rate optimization, and SEO audit services, cementing their commitment to providing comprehensive organic marketing solutions for their clients.
- Year Founded: 2009
- Company Size: 100-250
- Headquarters: San Francisco, CA
- Average Review Score: 4.8
- Other Services: Lead Generation, GEO, Web Design, Conversion Rate Optimization, Paid Search
| Summary of Online Reviews |
| First Page Sage employs “an in-depth strategic planning process” to support a “strong focus on lead generation and ROI”. Some SaaS customers find that their emphasis on content excellence means that results take a few months to see, “but it’s well worth it.“ |
REQ
REQ is a hybrid marketing agency that blends traditional advertising and SEO to create a uniform brand strategy for its clients across various marketing channels. Their services include on-page and off-page SEO, traditional PR, and social media in addition to their branding, UX, and SEO work.
REQ’s branding specialization and traditional advertising emphasis make them best suited for larger SaaS companies seeking to reinvent their image. While they also work well with smaller companies, the cost of their services often makes them a poorer fit for startups.
- Year Founded: 2008
- Company Size: 51-100
- Headquarters: Washington, DC
- Average Review Score: 4.7
- Additional Services: PR, Branding, Advertising
| Summary of Online Reviews |
| REQ has “solid communication skills and workflow” but works best with a client who is “active” and highly engaged. |
Clay Agency
Clay Agency‘s focus is on the UX design and conversion optimization side of SEO. Their full-stack web design and development can help their clients optimize their websites to push visitors through the digital marketing funnel.
Because of this conversion focus, the best fit for Clay Agency’s services is SaaS companies that have strong organic traffic but that fail to capitalize on it to generate leads.
- Year Founded: 2016
- Company Size: 11-50
- Headquarters: San Francisco, CA
- Average Review Score: 4.7
- Additional Services: UI/UX Design, Product and Brand Strategy
| Summary of Online Reviews |
| Clay Agency excels in “high-quality” design, which delivers results at a “great price“. They particularly excel in their “close attention to detail“. |
Epsilon
Epsilon is a global marketing firm that offers full-service marketing for SaaS enterprises, combining traditional and digital marketing under a single roof. They allow enterprises to connect with a single vendor for a wide array of services, mitigating the cost of the complex vetting and setup processes that those enterprises often face. In addition to their enterprise work, they have also run successful campaigns for high-profile startups such as Faraday.
- Year Founded:1969
- Company Size: 500-1000
- Headquarters: Irving, TX
- Average Review Score: 4.5
- Additional Services: Digital Media, Data Solutions, Customer Insights
| Summary of Online Reviews |
| Epsilon justifies its “very costly” pricing with teams that are “attentive” and “responsive” to enterprise clients’ needs, and “strong” results. |
Marketing Eye
Marketing Eye specializes in technical SEO, with web development as its primary service. They also offer strategic consulting to clients that already have an in-house marketing team but have more limited capabilities than many of the other agencies on this list. This makes them a better fit for SaaS companies with writing teams that can create their own SEO content for Marketing Eye to optimize.
- Year Founded: 2004
- Company Size: 11-50
- Headquarters: Atlanta, GA
- Average Review Score: 4.3
- Additional Services: Marketing Automation, Marketing Consulting, Web Development
| Summary of Online Reviews |
| Marketing Eye provides “competent and professional” work and offers “superior” service to its clients. |
Metric Theory
Metric Theory combines paid search, SEO, and visitor tracking to create multiple touchpoints that help searchers convert. They supplement search rankings through remarketing display ads and social media, creating lasting impressions in their target audience. Because their approach relies heavily on paid search, they work best with SaaS companies that prioritize rapid results over ROI.
- Year Founded: 2012
- Company Size: 101-250
- Headquarters: San Francisco, CA
- Average Review Score: 4.4
- Additional Services: SEO, Paid Search, Remarketing & Display Ads
| Summary of Online Reviews |
| Metric Theory excels in background research that is both “thorough“ and “effective“, but occasionally clients feel their team would “benefit from having more resources“. |
Kalungi
Kalungi offers fractional marketing teams for SaaS companies—in other words, teams that integrate more closely with their clients’ companies than traditional marketing agencies. They’re explicit about their ideal clientele: B2B SaaS companies that are expecting growth but lack their own marketing team. This makes them a good fit for high-profile, early-stage startups.
- Year Founded: 2018
- Company Size: 51-100
- Headquarters: Seattle, WA
- Average Review Score: 4.1
- Additional Services: Fractional Marketing Teams, SaaS CMO Coaching
| Summary of Online Reviews |
| Kalungi “shines” when it comes to its people and provides teams that are “kind and professional“. |
RNO1
RN01prioritizes market research and design, offering comprehensive brand explorations for SaaS clients who need to create a unique brand identity. They also emphasize the importance of strong UI/UX design, creating unique digital experiences for visitors to the clients’ websites. They work best with innovative SaaS startups, particularly those focused on Web3.
- Year Founded: 2009
- Company Size: 11-50
- Headquarters: Redwood City, CA
- Average Review Score: 3.9
- Additional Services: Brand Strategy, UI/UX Design, VR & AR Design
| Summary of Online Reviews |
| RNO1 provides a “great” quality branding service, is “super responsive“, and their teams are “passionate” teams. |
The Top SaaS SEO Companies by Industry
Our team has compiled lists of the top 5 SEO agencies for each of 4 major SaaS industries:
The results are shared in the tables below:
The Top Adtech SEO Agencies
| Rank | SEO Agency |
| 1 | RNO1 |
| 2 | Clay Agency |
| 3 | First Page Sage |
| 4 | REQ |
| 5 | Kailungi |
The Top Fintech SEO Agencies
| Rank | SEO Agency |
| 1 | First Page Sage |
| 2 | TOP Agency |
| 3 | CSTMR |
| 4 | Clay Agency |
| 5 | Alaniz |
The Top Medtech SEO Agencies
| Rank | SEO Agency |
| 1 | First Page Sage |
| 2 | Metric Theory |
| 3 | REQ |
| 4 | Alaniz |
| 5 | Epsilon |
The Top Proptech SEO Agencies
| Rank | SEO Agency |
| 1 | REQ |
| 2 | First Page Sage |
| 3 | Clay Agency |
| 4 | Metric Theory |
| 5 | Smart Bug |
