We Assessed the Top 15 Best SEO Agencies in the USA

Quick Summary

We explained what to look for in a U.S. SEO agency, how much SEO typically costs, and shared 15 top-rated options: Embarque, Siege Media, WebFX, Victorious, and Straight North. Read the full guide to find the right fit for your business.

Want to find the perfect SEO agency in the USA?

Type “SEO agency USA” into Google, and you’ll get hundreds of results that all sound… basically the same. 

Same promises, same buzzwords, same vague plans. If you’ve been through that loop before—or just want to skip the trial and error—this list will save you time

We’ve handpicked 15 SEO agencies in the United States with solid processes, real results, and actual SEO thinking behind what they do. 

But before we get into it…

Why listen to us?

We’ve worked with a lot of companies who came to us after a bad agency experience. Half-baked strategies, content that never ranked, money wasted. We’ve seen it. We’ve also seen what great SEO work looks like up close.

At Embarque, we’ve helped teams like Cleanvoice and Flick grow through content that’s actually strategic and search-focused. This list is based on that kind of experience. We know what to look for because we do this ourselves every day.

Why work with an SEO agency based in the US?

They help you tap into local search opportunities

If your customers are in the US, working with an agency that understands the local market gives you an edge. They know how to build content around region-specific keywords, trends, and search behaviors that actually drive results.

They’re easier to work with if you’re in a similar time zone

If you're based in the US or work US hours, it makes sense to partner with a team that operates on a similar schedule. It saves time, improves communication, and helps projects move forward without delays.

They offer deeper strategic input

Experienced SEO agencies bring more than execution. They help you prioritize, map out content based on search intent, and keep things aligned with algorithm updates. It’s less guesswork and more direction.

They free up internal resources

Working with an agency gives your team more breathing room. Instead of managing SEO in-house, you get a partner who can take ownership of planning, writing, and optimisation—so your team can stay focused on other priorities.

15 Best SEO Agencies in the USA

1. Embarque

Embarque is a revenue-driven SEO agency helping companies grow through product-led content and performance-focused strategies. We work with startups and big names like Buy Me a Coffee, VEED, and Riverside to turn organic traffic into actual signups, leads, and revenue.

Our team is fully remote, with specialists across the US, UK, Europe, and Asia. That gives us global reach with the flexibility to plug into your internal team wherever you are.

We have a fairly simple model: revenue-first SEO. That’s why all of our fixed SEO packages are tailored to your growth goals. Whether you need high-quality blog content, strategic backlinks, or a full SEO roadmap, we deliver work that’s grounded in data and aligned with business outcomes.

Clients stick with us because we stay close to results. Every piece of content is backed by revenue-driven keyword research, user intent, and clear objectives. 

Key Services

• Blog and landing page SEO content
• Link building through manual outreach
• SEO audits and on-page optimization
• Monthly SEO packages with clear deliverables

Key Results

• Helped Instatus grow MRR by 833%
• Achieved More than 1,600% increase in annual revenue for MentorCruise
• Increased Flick’s organic traffic by 9.6 million visits annually

2. Siege Media

Siege Media is an SEO content agency originally out of San Diego, now based in Austin. They work mostly with mid-to-large SaaS, e-commerce, and fintech companies that need content to drive ROI. 

Their work combines content strategy, writing, design, and outreach. They also build full content systems that include technical SEO, link building, and even interactive assets. Ross Hudgens, the founder, still leads the team, and they’ve made the Inc. 5000 list for fast growth.

Key Services

• SEO content strategy and writing
• Link building and digital PR
• Technical SEO and on-site optimization
• Design-forward assets and visual content

Key Results

• 440+ backlinks built for Kraken through digital PR
• Grew Figma’s organic traffic value by 2,000%+
• Manages over $12M in monthly traffic value for clients
• Worked with Airbnb, Hippo, The Zebra, Casper, and others

3. Conifr

Conifr is a smaller, hands-on SEO consultancy out of Oregon. They focus on evergreen SEO strategies like technical audits, content optimization, and link building. 

Conifr doesn’t have a huge footprint online yet, but their founder has worked with heavy hitters like Google and Amazon.

Key Services

• Technical site audits
• Content development and optimization
• Keyword research
• SEO training for in-house teams

Key Results

• Tripled organic traffic year-over-year for a client
• Consistently delivers steady increases in keyword visibility and leads

4. Searchbloom

Searchbloom is a Utah-based SEO agency that’s been around since 2014. They’re known for their structured approach, using what they call the ART framework—Authority, Relevance, and Technology—to shape every strategy. 

Clients range from local businesses to large B2B and e-commerce brands, and the agency tailors its work to each one rather than pushing a standard package. They’re also the kind of agency where you’ll usually work with a senior strategist from the start, not get passed off to a junior team.

Key Services

• Local, national, and enterprise SEO
• Technical SEO and on-page optimization
• Content strategy and link building
• PPC campaign management

Key Results

• Delivered a 2,500% lift in top-3 keyword rankings for a local SEO client
• Helped a multi-location law firm grow organic users by 264%
• Trusted by brands like Subway, Verizon, Bill.com, and Rancher Labs
• Known for tripling leads and boosting revenue through combined SEO and PPC efforts

5. Titan Growth

Titan Growth is an SEO agency based in San Diego, best known for its proprietary TitanBOT® technology. The tool simulates how search engines crawl a website, helping their team find technical issues and content opportunities others might miss. 

The work is often a mix of technical SEO, content, CRO, and paid media, depending on what’s needed to move the needle.

Key Services

• Technical SEO and site audits
• Keyword research and content strategy
• Conversion rate optimization
• Paid media and competitive analysis

Key Results

• Drove 35,000%+ growth in organic traffic for some clients
• Helped an e-commerce brand earn 200+ first-page rankings in one year
• Improved traffic significantly for multiple clients after fixing crawl issues
• Worked with brands like Tony Robbins, Experian, Jazzercise, and Sharp Electronics

6. Los Angeles SEO Inc.

Los Angeles SEO Inc. is a small, long-running SEO agency serving local and mid-size businesses in and around LA. They’ve been around for over 15 years and focus mainly on local and e-commerce SEO. 

A lot of their clients are in healthcare, education, or professional services—and many come to them for help getting to the top of local search and Google Maps. The agency is run by founder Brandon Leibowitz, who still works closely with clients and is often mentioned in reviews for being hands-on and responsive.

Key Services

• Local SEO (Google Business Profile, citations, Maps ranking)
• National SEO and link building
• SEO site optimization and content writing
• Web design, PPC, and social media marketing
• Online reputation management

Key Results

• Helped a local service business rank #1 in Google Maps and grow monthly leads by 120%
• Drove a 30% increase in online sales for an e-commerce client after fixing site structure and backlinks
• Many clients report doubling or tripling their website traffic within six months

7. Moburst

Moburst is a global marketing agency that blends mobile app growth with traditional SEO. They have offices in New York, San Francisco, and Tel Aviv, and work with everything from Fortune 500 brands to tech startups. 

A big part of what makes them different is how they combine App Store Optimization (ASO) with SEO, so they’re improving visibility both on Google and inside app stores. 

Key Services

• ASO and mobile growth campaigns
• SEO (on-page, technical, off-site)
• Content marketing and influencer campaigns
• Paid media, creative production, and social media

Key Results

• Cut CPI by 87% for Shopkick through a TikTok ad strategy
• Brought in 50,000+ waitlist signups for a product pre-launch
• Delivered an 832% uplift in paid + organic media performance for a major U.S. brand
• Helped Calm app boost installs by 36%

8. Straight North

Straight North is an Illinois-based SEO agency, with more than two decades of experience helping small and mid-sized businesses grow online. Besides SEO, they also offer related services like PPC, email marketing, and everything lead gen. 

Speaking of which, an interesting part of their SEO pitch is how they validate and track leads, so businesses don’t just see traffic, they see which leads actually came from SEO.

Key Services

• SEO (on-site optimization, content, link building, local SEO)
• Paid search and web development
• Email marketing and conversion-focused design
• Lead tracking and validation system

Key Results

• Increased form submissions by 200% for a professional services firm
• Improved organic traffic by 100%+ year-over-year in multiple client cases
• Helped an e-commerce business grow sales by 15% while lowering cost-per-acquisition
• Often credited with improving both lead quality and close rate through combined SEO + CRO

9. WebFX

WebFX is a huge player in the SEO space. Based in Harrisburg, PA, they’ve been around since the mid-90s and have grown into a team of 500+ people. 

They’re known for taking a data-first approach to SEO, backed by their in-house software, MarketingCloudFX, which helps track everything from leads to revenue. That scale means you’re not just getting one account manager—you get a full team of SEO, content, and dev specialists who handle everything from strategy to implementation.

Key Services

• Technical SEO, on-page optimization, and content marketing
• Link building and local/e-commerce SEO
• ROI tracking with their MarketingCloudFX platform
• Full digital support including PPC, web design, CRO, and social media

Key Results

• Helped clients generate over $10 billion in revenue from SEO
• Delivered a +300% organic traffic increase for a retailer in 12 months
• Drove 250+ first-page keyword rankings for a B2B company within a year
• Used conversion optimization to turn that traffic into measurable sales growth

10. Thrive Internet Marketing Agency

Thrive is a full-service digital agency based in Texas, with a friendly, hands-on reputation. They’ve been doing SEO since 2005 and work mostly with small to mid-sized businesses that want solid rankings, more leads, and a reliable marketing partner. 

Most clients stick with them for years, and reviews consistently highlight how invested the team feels.

Key Services

• SEO audits, content writing, and keyword strategy
• Local SEO and online review management
• Technical SEO and link building
• Additional support across PPC, email, social, and Amazon SEO

Key Results

• Helped an HVAC company grow organic leads by 214% in a year
• Boosted a law firm’s visibility to rank for 25+ new keywords, bringing in steady leads
• Increased an e-commerce store’s organic revenue by 119% in 6 months
• Reports include traffic, keyword movements, and lead attribution

11. Victorious

Victorious is another San Francisco-based agency that only does SEO quite well. 

They don’t bundle in social or paid ads. Instead, they go deep on strategy, execution, and results for search. Whether it’s national SEO, local multi-location, or scaling technical SEO for a big enterprise site, they tailor everything around your business goals. 

Key Services

• In-depth SEO audits, technical fixes, and on-page optimization
• Content planning, writing, and high-quality link building
• Multi-location SEO for franchises and regional brands
• Conversion rate optimization and SEO-friendly design tweaks

Key Results

• Increased organic conversions by 300% for a B2B SaaS brand
• Grew a financial services client’s traffic by 720% through content and links
• Took a multi-location business to page one for every service area‍
• Won 33+ awards for “Best SEO Campaign”

12. Session Interactive

Session Interactive is a boutique SEO and digital strategy agency based in Denver, and they keep things tight and personal. 

The team’s small, but that’s by design. Every client gets hands-on support from senior experts, often including founder Adam Staats himself. 

Key Services

• Technical SEO, content strategy, and link acquisition
• PPC and paid search campaign alignment
• Full-funnel audits with a focus on conversions
• Analytics and tracking implementation

Key Results

• Boosted organic traffic by 256% for a public safety startup
• Helped a marketing agency hit a 300% sales increase through SEO
• Delivered a 26% revenue lift in 7 months for a B2B company by syncing SEO and PPC
• Often steps in where internal efforts stalled and turns things around with focused execution

13. Simpletiger

SimpleTiger is a lean SEO agency built specifically for SaaS companies. They’re based in Florida, but they work with global software brands that want fast, meaningful SEO results. 

They’ve been doing this for 15+ years and run their campaigns like they’re part of your team.

Key Services

• AI-driven keyword research and SaaS content creation
• On-page SEO and technical optimization
• Link building and content promotion
• SEO consulting and ongoing reporting

Key Results

• Grew Stream’s signups by 243% through SEO alone
• Cut CPA by 94% for a SaaS client by replacing paid traffic with organic
• Increased Segment’s traffic by 127% and Bitly’s organic conversions by 30%
• Helped multiple SaaS brands rank in the top 5 for highly competitive terms

14. Zupo

Zupo is a newer SEO agency based in Orange County, but it’s quickly built a reputation for combining SEO and digital PR in a way that works especially well for B2B companies. 

Instead of just tweaking metadata and pumping out blog posts, Zupo helps clients rank while also building brand authority — landing them in real publications and boosting their visibility on Google at the same time. Their clever mix of content, strategy, and PR positions them as a strong choice for thought-leadership-driven growth.

Key Services

• SEO strategy, keyword targeting, and technical fixes
• Digital PR campaigns for link building and brand visibility
• Content development with a focus on thought leadership
• Online reputation and SERP presence management

Key Results

• Tripled web leads and doubled revenue for a video agency
• Achieved a 97% traffic increase and 2× conversions for an engineering firm
• Grew referring domains by 50+ in 6 months for one client, leading to big jumps in rankings
• Frequently secures high-authority backlinks that also build client brand

15. Ignite Visibility

Ignite Visibility is one of those big-name SEO agencies that’s still got a personal touch. Based in San Diego and founded in 2013, they’ve grown fast — landing on the Inc. 5000 list multiple times — but haven’t lost their focus on transparency and ROI. 

Their team of 100+ covers pretty much everything across SEO and digital marketing, from local search to enterprise-level international campaigns. Clients work with senior account managers and get access to regular reports and custom forecasts, so expectations are always clear.

Key Services

• SEO across the board (on-page, off-page, technical, local, international)
• Digital PR, link building, and content creation
• Amazon SEO and conversion rate optimization
• Paid search and social ads, influencer outreach
• Strategy powered by their in-house Certainty Tech Platform

Key Results

• Boosted organic revenue by 300% in 6 months for an e-commerce brand
• Delivered 35,500% traffic growth for clients across 200+ SEO campaigns
• Helped a SaaS brand rank #1 for 10 core keywords, contributing to a successful acquisition
• Drove a 150% increase in foot traffic through local SEO for a multi-location retailer
• Achieved 20+ first-page rankings for a B2B client in under 12 months

How to choose the right SEO agency in the USA

Proven Experience and Real Results

Always start by asking: have they done this before, and have they done it well? A good SEO agency should have clear examples of how they’ve helped similar businesses grow. Agencies that understand your business model or market tend to get traction faster. 

At Embarque, we publish detailed case studies so you can see exactly how we’ve helped companies like yours grow. For example, if you’re a SaaS, you can see how we’ve helped Cleanvoice and Instatus increase MRR by 300% and 833%, respectively. 

Reputation and Reviews

A strong track record isn’t just what an agency says, it’s what others say about them. Check platforms like Clutch, Google, and G2 to see how past clients rate their experience. 

Look for agencies with consistent 4.8 to 5.0 star ratings and feedback that mentions things like clear communication, real ROI, and smooth collaboration. 

Services That Match Your Goals

SEO is broad—some agencies do everything, while others specialise. Before you book any calls, get clear on what you need. Are you trying to grow a SaaS blog? Rank locally? Get help with technical SEO? Once you know your goals, check that the agency covers those areas well. 

You can always ask them how they’d tackle your use case—whether that’s international SEO, content-led growth, or ranking for transactional keywords. A solid agency will walk you through a tailored plan, not throw a boilerplate at you.

Communication and Transparency

SEO takes time, so it’s important to work with people who keep you in the loop and don’t overpromise. The best agencies will walk you through their process, explain what they’re doing (and why), and send regular updates so you always know where things stand. Be wary of vague claims or “guaranteed” rankings—real SEO doesn’t work like that. 

How Much Do SEO Agencies Cost in the USA?

SEO pricing in the U.S. varies a lot—and most of that comes down to what’s included and who’s doing the work. Most small to mid-sized U.S. companies spend $1,000–$3,000/month for quality SEO. Larger brands often invest $5,000+ monthly. Hourly, $100/hour is a solid baseline. For one-off projects, expect around $5k as a middle-of-the-road budget.

But before picking a number, it helps to understand the four biggest factors that affect the cost.

Scope of Work

The more complex your SEO needs, the higher the price. A basic local SEO plan targeting a few keywords will cost less than a national campaign that involves content production, link building, audits, and technical work. If you’re looking for a full strategy—research, content, backlinks, and optimization—expect to pay more than if you only need keyword tweaks or a one-time audit.

Agency Reputation and Expertise

Top-rated agencies with a strong portfolio usually charge more than newer or generalist firms. You’re paying for experience, proven results, and a team that knows how to deliver outcomes. That said, price doesn’t always equal quality, so check case studies and reviews to see if their pricing lines up with real performance.

Services Included

Some agencies bundle everything into one package—technical fixes, blog content, backlinks, and reporting. Others might offer a base plan and charge separately for content or outreach. Always ask what’s included in the price. If content creation is built in, that adds a lot of value, especially if the writing is high quality and SEO-focused.

Geographic Location

Agencies in big cities like New York or San Francisco may charge more due to overhead, but that’s less of a factor now with remote work. Still, U.S.-based agencies tend to cost more than overseas providers. Many businesses are willing to pay more for clear communication, time zone alignment, and cultural familiarity.

Boost your business’s SEO strategy with Embarque!

SEO is a scalable, self-sustaining channel that compounds over time. But to get there, it needs to be planned and executed by people who know what they’re doing—from technical setup to content to strategy.

In this guide, we’ve walked through what to look for in an agency, and a list of some of the top 15 SEO partners in the U.S.

However, if you don’t have time to vet dozens of agencies, we get it. You can skip the search and book a free consultation with us. We’ll help you figure out whether we’re the right fit—or point you in the right direction if we’re not.