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Top 5 Inbound Marketing Agencies for High Growth Startups


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In the dynamic startup landscape, distinguishing your brand is crucial. With its focus on engaging customers through relevant and helpful content, inbound marketing is a key strategy for any brand looking to break through in a competitive niche. 

This approach aligns with startups’ need for visibility and sustainable expansion in a competitive market. However, in this regard, selecting the right inbound marketing agency is vital, as the right partnership can supercharge your growth. 

With that in mind, we’ll use the next couple of sections to discuss the top 5 inbound marketing agencies, how they attract inbound leads, and which awards and successful campaigns they have to their name. 

What is Inbound Marketing?

You may not be familiar with inbound marketing and how it can benefit your business. How is it different from other forms of digital marketing such as outbound marketing

Inbound marketing is a non-invasive form of marketing that’s based on providing the right content. The ultimate aim is to attract users to your website (or product page) through content that moves them along the buyer journey. So instead of going to the buyer, you let the buyer come to you.  

The main strategies of inbound marketing include:

  • Content marketing
  • SEO optimization
  • Marketing automation
  • Social media marketing

Typically, an inbound marketing strategy is divided into three stages; attract, convert and close. During the attract stage, the marketer will use relevant content to attract consumers to your product. 

This content can take several forms, including blog articles, social media posts, etc. Regardless of the strategy, the content must build brand trust within its targets. 

The convert stage involves using more content to help the target solve their problem while also allowing you to gain more information about them. For instance, the target may be required to fill in a form before downloading said content. This is what turns your target or visitor into a lead.

During the close stage, the marketer will use relevant content, lead nurturing, and lead scoring to help the lead make a purchase and move them along the buyer journey. This can include interactive content such as surveys and chatbots. The ultimate goal is to convert the lead into a customer. 

In some cases, you might also find yourself using typically outbound tools, mainly those pertaining to social media management and email automation. However, because of inbox over-saturation, audience fatigue, and advancements in ad-block and spam filters, these approaches have resulted in diminishing returns.

How to Choose a Great Inbound Marketing Agency

There are a few things to consider and look out for when assessing an inbound marketing firm. One of the most obvious is how long they’ve been in the industry, their reputation and awards.

Likewise, you should look at their general methodology, mainly how they apply the strategies discussed in the previous section. You can deduce much of this information by studying client success stories as well as third-party reviews from trusted sites and/or companies.  

The good news is that there are a lot of marketing agencies out there that either offer or specialize in inbound marketing. We used the above to create and distill a short list of five of the finest inbound marketing companies. This should make your search easier.  

The Top 5 Inbound Marketing Agencies [2024 Review]

1. BlueTree


BlueTree is renowned for its cutting-edge link-building and content marketing strategies. In the last 6 years, we’ve amassed an editorial network spanning over 500 different sites.

Where most PR and inbound marketing firms find that they have to create and pitch proposals to the relevant site and business owners, we leverage our pre-established network to quickly launch your campaign.

After all, there’s no commodity more valuable than time and we understand this. To guarantee that your campaign is successful, we use a data-driven approach to link-building while ensuring that each customer’s experience is unique.

These innovations and attention to detail allow Blue Tree to consistently deliver exceptional client results. 

Services Offered

Blue Tree’s main offerings include:

  • Digital PR
  • White label link building
  • Custom blog outreach
  • High authority backlinks
  • Link building service

While our services satisfy all aspects of inbound marketing, link build is our bread and butter. And this is all possible due to our team of writers who regularly produce high-quality content for hundreds of publications. Consequently, they know what content resonates best with site owners, editors and readers. 

This allows us to identify the best content to associate your brand with. Moreover, since Google rankings can be swayed by trends, we at BlueTree are firm believers in long-term PR and marketing strategies.

As such, we continue to increase our clients’ internet presence. We do this by creating content that will be relevant and SEO-friendly for years to come.

Blue Tree’s clear pricing allows your company to budget and financially plan for its marketing accordingly. It offers three price plans.

Each package’s services and features are well highlighted so you know what you’re getting. All plans feature biweekly status updates enabling you to keep track of your campaign.

Case Studies

BlueTree specializes in inbound marketing for various industries and niches including cybersecurity, fintech, SaaS, and eCommerce. As such, we’ve worked with a variety of clients, such as accounting software giant Freshbooks, which saw a 257% increase in organic traffic

Dooly, a sales enhancement platform, saw even better results, with their organic traffic rising by 501%. The key in both of these campaigns, as well as those for Brainstation, CreditDonkey and The Tokenist, was our leveraging of editorial relationships to publish relevant content with valuable PR mentions. 


BlueTree’s extensive list of awards and accolades includes:

  • Rated one of the best Link Building Companies by SEO Discovery
  • Top Link Building Agencies by The Manifest
  • Rated Best Link Building Agency By SERP Forge
  • Best Fintech Marketing Agency by The Tokenist 
  • Best Link Building Agency in 2023 by Martech 360
  • Link-building companies to watch in 2023 by Search Engine Land

2. Siege Media

Siege Media

Siege Media is a San Diego-based content marketing agency primarily serving business-to-consumer (B2C) and non-technical business-to-business (B2B) clients. However, they’re also known for producing SEO-driven content for clients in Fintech, SaaS and eCommerce. 

Since its establishment in 2012, the company has made a name for itself by creating high-quality content that is engaging and resonates with its clients’ audiences.

Siege Media specializes in visual storytelling but it’s not all just superficial fluff built to entice users death scrolling through social media. All of Siege Media’s content is underpinned by effective SEO allowing it to reach the right audience. 

Services Offered

Siege Media’s inbound marketing services include:

  • Link building
  • Digital PR
  • Content marketing 

In addition to the above services, they also dabble in graphic design, video production and content creation, offering their clients a nearly 360-degree take on inbound marketing services. 

Case Studies

Siege Media has worked with a long list of notable brands, including Adidas, Airbnb, Audible and Casper. It’s managed to help decades-old companies such as Shutterfly increase their blog traffic value to over $1.7 million. 

Siege Media achieved this feat by overhauling the quality of Shutterfly’s content while ensuring that it was search engine optimized. It also implemented some of the very same strategies for Zola and Instacart


Since 2016, Siege Media has consistently featured on the Inc. 5000 list which consists of the fastest-growing private growing private companies in America. In 2022, they were named the sixth-best service provider (of any kind) as well as the third-best B2B service provider in Texas. 

3. Single Grain


While Single Grain has been around for nearly a decade, it only truly burst on the scene after it was purchased by author and marketer Eric Sui. Before then, it primarily specialized in search engine optimization. 

Today, it’s cited as one of the pioneers of modern inbound marketing and it continues to innovate with its focus on budding technology and industries such as Crypto, NFT, and Web 3.0.     

As a HubSpot Agency Partner, Single Grain boasts a vast network of certified agencies worldwide. 

Services Offered

Some of Single Grain’s inbound marketing-centric services include: 

  • Digital marketing
  • Paid advertising
  • Content marketing
  • Conversion rate optimization

Single Grain also specializes in digital marketing for Software-as-a-Service (SaaS) companies. It employs a team of highly experienced and well-trained social media experts to help SaaS vendors turn leads into long-term users. 

Case Studies

Brands that Single Grain helped elevate include Axure, Keeper and Frontend Masters.

One of Single Grain’s crowning achievements is reducing stock photography marketplace Twenty20’s cost per marketing qualified lead (MQL) by nearly 73%. The marketing agency achieved this by implementing an all-digital strategy that first focused on social media advertising along with SEO. 


In 2018, Clutch named Single Grain one of the top pay-per-click (PPC) marketing companies and SEO Firms in Los Angeles. They were also ranked the 5th of the top inbound marketing agencies in LA. Single Grain was also named Jives Media’s Digital Marketing Agency of the Year from 2019 to 2023.     

4. SmartBug Media


Headquartered in Newport Beach, California, SmartBug Media is one of the largest digital marketing agencies. In fact, it’s currently one of the most decorated HubSpot Agency Partners.

Its holistic approach has proven quite effective in helping startups build reliable funnels that can be scaled alongside their sales pipeline. SmartBug’s inbound marketing expertise spans content creation, lead nurturing and marketing automation. 

Services Offered

As a full-service digital marketing agency, SmarBugs services include:

  • Market automation
  • Revenue operations
  • SEO
  • PR
  • CMS building 

SmartBugs’ Revenue Operations solutions include training and workshops that can help upskill entire organizations on the topics of inbound marketing, sales marketing and account-based marketing. 

Case Studies

SmurtBug has an impressive portfolio of success stories for its diverse clients. One such client is Invigor8, a health and supplement company. Through a combination of techniques in inbound and outbound marketing, SmartBug Media helped them outdo their highest Amazon sales window by $7,053.

JunoHealth is another company that benefited from SmartBug’s expertise. SmartBug streamlined and improved its inbound marketing by reconfiguring and improving its Hubspot portal. 


In 2018, SmartBug Media was awarded the Global Partner of the Year at the Hubspot Impact Awards. The company received a similar achievement in 2021 when it was awarded the (regional) Partner of the Year prize for selling more HubSpot subscriptions and services to its clients in North America. 

SmartBug Media has also been included in the Inc. 5000 list of the fastest-growing private companies since 2016. It was ranked number 140 on Inc Magazines List of the Pacific Region’s Fastest-Growing Private Companies.

Additionally, SmartBug has received a host of awards from Comparably including Best Company Culture (2022), Best Company Leadership (2023 and Best Company Outlook (2023).  

5. Lean Labs


Lean Labs specializes in delivering engaging, high-conversion, data-driven content for tech startups and SaaS vendors. As its name indicates, Lean Labs services are catered towards lean startups.

In fact, the company uses its own innovative Lean scalable growth system to help businesses accelerate and scale upwards. It does this by examining the latest strategies that high-growth companies have used to succeed.

They then develop an engaging buyer journey informed by these aforementioned strategies. Afterwards, Lean Labs adjusts and refines its campaigns (if needed) to meet acquisition and growth goals.         

Services Offered

Lean Labs’ main services include: 

  • Growth marketing
  • CRO
  • Marketing strategy Development
  • Web development

Case Studies

Lean Labs has worked with a slew of notable tech companies including internet and communications provider, Atlantech Online and Project Management B2B ZenPilot. As a new player in the telecommunications industry, it was quite difficult for Atlantech to gain a foothold.

Its biggest issue was that the company was failing to organize its site traffic accordingly.  Since it only operates in Washington DC, it can only cater to clients within that area. Thus, foreign and out-of-state leads and site visitors were virtually useless to them. 

Lean Labs addressed this issue by qualifying leads and creating copy that would appeal to Atlantech’s target audience. It was a success. Altantech experienced a 355% increase in qualified leads. 


By applying some of the same techniques it later used for Atlantech, Lean Labs was able to increase software platform Integrate’s conversion rate by 271%. It also increased its page views by 98% and decreased its bounce rate by 65%. For these efforts, Lean Labs won the Growth Driven Design Client Success Prize from the 2016 HubSpot Impact Awards. 

How to Choose the Right Inbound Marketing Agency

Now that you have your shortlist of the top inbound marketing agencies, making the right choice can still be a little daunting. So, with that in mind, there are a couple of things to consider when looking for the best inbound marketing services provider: 

Define Your Goals and Needs

When choosing a marketing agency, it’s important to have a clear idea of your goals and business needs. It’s important to take stock of all your marketing channels and digital content. This includes websites, social media pages, etc.

Web marketing channels

Do you know where your company’s marketing or conversion weaknesses lie? Not only will these help you determine which is the best marketing agency for you, but it will also make later communication much easier. 

If you’re in need of white label link building services, say so explicitly. But at the same time, if an agency says something isn’t doable and provides tangible proof to back those claims up, it would be wise to listen to them. 

Agency Expertise and Experience

You need to consider what expertise you’re looking for. Do you prefer inbound marketing companies who have certain accreditations or experience? 

This should align with your business goals and inbound marketing requirements. If you want to increase your social media presence, your candidate marketing agency needs to show that they have a proven record of increasing engagement and page followers. The best way to do so is through case studies, and ideally, video testimonials. If a client is willing to put their face behind their review, that shows they were pleased with the services.  

Budget and Pricing Structure

The issue with some marketing agencies is that their pricing can be a little opaque. It’s easy to understand why if you consider that most marketing agencies offer custom services. With so many different services that cover industries, sometimes, it can be hard to apply a one-size-fits-all price.

Selling links

Nevertheless, all inbound marketing services the agency provides should have a clear highlighted pricing structure for their services. This should make it easier for you to gauge affordability, and budget and compare prices between your short list of marketing agencies.   

Measurable Results and Reporting

Earlier, we mentioned that you should have goals, KPIs and metrics to determine the success of your new inbound marketing campaign. However, your company shouldn’t be doing all the monitoring and tracking. 

Your prospective marketing agency should be able to provide you with data, analytics, insights and reports to help you track the progress and success of their strategies, resulting in a completely hand-off process. Without worry about links, placements and how the process moves, you can focus on strengthening your startup in other aspects in the digital realm. 


The above text supplies you with a comprehensive guide shedding light on the top 5 inbound marketing agencies. It highlights their strengths, specialties and unique approaches to stimulating growth and achieving marketing success.  

If you’re serious about strapping a rocket to your startup’s digital PR efforts, don’t hesitate to contact the BlueTree team, schedule a call and get acquainted without a full suite of inbound marketing services and strategies. 

Frequently Asked Questions (FAQ)

What makes inbound marketing different from outbound marketing?

Inbound marketing involves creating and planting carefully curated content that entices leads and buyers. Essentially, inbound marketing is passive and subtle. On the other hand, outbound marketing involves proactively reaching out to leads and potential customers through cold calling, emailing, direct advertising, etc.   

How do these agencies measure the success of their campaigns?

Inbound marketing agencies use a slew of variables and measurements to determine the success of their campaigns. These include qualified leads, organic blog/website traffic, social media traffic, time-on-site, bounce rates, time-on-page, conversion rates and return on investment. Ultimately, which KPIs the agency decides to use hinges on the goals or requirements of the client.   

How do companies benefit from inbound marketing strategies?

Inbound marketing strategies are less intrusive and caustic than direct methods of marketing. It can make leads feel as if they’ve organically discovered your product.

How long does it typically take to see results from inbound marketing efforts?

Most inbound marketing strategies and techniques need a “fermentation” period. Businesses seldom reap the fruits right away. It can take up to a year to finally see the results of your inbound marketing strategy. While some companies may be lucky enough to see the needle move within a month of launching their campaigns, others have to wait an average of six months.     

What are some common challenges businesses face with inbound marketing?

One of the biggest challenges of inbound marketing is that some businesses may not be compatible with it. Tech companies are preferred by inbound marketers because they’re easy to promote and scale, whereas niches like skincare and food are much more abstract and difficult to approach. 

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Dan Fries

Dive deep into the mind of BlueTree CEO Dan Fries and explore a wealth of knowledge on the nuances of link-building and digital marketing.

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