Top 15 Startup Marketing Agencies: 2025Edition

Are you pre-product, post-product, pre-revenue, or funded (pre-seed, series A)? Depending on the stage of your startup, you may have different needs and priorities. Accordingly, you’ll need to set up your business goals and find a marketing partner that suits you.

Speaking of which, we made a list of the top startup marketing agencies.

1. GrowthRocks

GrowthRocks is a growth hacking marketing agency that helps startups and well-established companies to achieve rapid and sustainable growth. It is headquartered in London with worldwide partners from India and Finland to the US and Greece.

One of the top startup marketing agencies, GrowthRocks also has a thing for education and training. Accordingly, it has created several academies and courses throughout the years. SEO Academy, Content Marketing Academy, Growth Hacking Academy, and now AI for Marketing and AI for Hospitality are the most notable ones.

And what’s more, GrowthRocks’ CEO, Theo Moulos, himself accepts free 30′ consulting calls, when he is not teaching at NYU or GHU. Book him here.

2. GrowthGirls

GrowthGirls is a startup marketing agency by women for women. The ranks of GrowthGirls are taken up by women and the agency itself mostly works with brands that are also run by women. The motto of GrowthGirls is “The truth is in the numbers” which gives away their data-driven approach in anything they do.

GrowthGirls also specializes in the US market through a wide range of services, including social selling, social media strategy, and performance marketing. Some of the clients the agency has worked for and is still working with include the Sundance Film Festival, Lana Bank, and Oh app.

Would you like to book a free call with GrowthGirls’ CEO, Effie Bersoux? Book a slot here.

3. Elysian Fields

As exited marketing agency founders, Venture Partners, and VC Investment Committee members, they understand the metrics investors are looking for in founders and they know that hitting funding milestones comes down to creating an Unfair Advantage for any company. They see this as a structured way of working that combines a powerful value proposition coupled with marketing operations to deliver sustained marketing testing and growth.

So they help customers treat marketing as engineering, with every insight validated and your CAC/LTV ratio below competitors. This process greatly stacks the funding odds in the customer’s favor.

Would you like to book a free call with Elysianfields’ Executive, Noah Bergman? Book a slot here.

4. Growth Division

Growth Division specializes in scaling pre-seed and seed-stage startups. Over the last five years, they have worked with over 100 different startups, helping them grow. Growth Division is founded on the principle of using channel-level experts to execute. They have a community of 80 vetted, high-quality freelance experts they call upon to build custom growth teams for startups based on their needs.

Having founded and scaled a startup of their own, the founders of Growth Division understand the need for flexibility in the early stages of growing a business. They are strictly against the idea of hiring a generalist marketer, their approach is to hire freelance, proven experts to put in place quick wins and best practices.

5. LaunchSquad

As stated in their manifesto,  LaunchSquad is “an eclectic community of people producing amazing work for clients we love.” The agency works with startups as well as with bigger companies and brands. Regardless, LaunchSquad has the DNA of a startup as they are flexible, quick, and produce high-quality results at a fast pace

Furthermore, a number of case studies from working with companies like Coursera and iHeart Radio, testimonials, and practical results, highlight the top-quality services of this agency. Besides having a roster of big clients to showcase, Launchsquad was recently named one of PRWeek’s Best Places to Work and one of Inc.’s 5,000 fastest-growing privately held companies for the past years.

6. Odysseus Arms

With the motto ” Someone has your market share, let’s go out and get it,” this startup marketing agency uses freelance creatives and specialists to create a stellar team for any one of its projects.  As a tech-oriented firm, Odysseus Arms has partnered with some of the largest tech companies like Facebook, Kodak, and Microsoft.

The agency has many impressive case studies to show like the Asana rebranding or the historic OUYA Kickstarter campaign, which raised $8.5 million (almost nine times their goal of $950,000). Also, there’s a case study about how the gaming platform OUYA turned to O-Arms to invigorate conversation about their product among hardcore gamers.

7. Wallaroo

Wallaroo Media is a social advertising and digital marketing agency based in Provo, Utah. They can help clients from their launch to their full scale-up, as their services include development, design, and marketing. Their specialization is eCommerce brands.

Wallaroo pairs members of their team with members of their clients so they can work together. Since 2012, Wallaroo has worked with brands like Gatorade, Disney, and NBA. Overall, this startup marketing agency has a big of experience in managing projects, growing brands, and bringing results.

8. Inbound Labs

Inbound Labs is about building a product and making it a market success story. Having partnered with some of the world’s best companies, nonprofits, startups, and incubators, Inbound Labs has gained experience in growing businesses. The agency covers a wide range of digital marketing needs. In this fashion, it makes high-converting web websites and landing pages and builds website integrations as well. It also provides both PPC and SEO services.

The team of Inbound Labs consists of 50 agents, including strategists, engineers, and creatives, located in 10 different countries, led by a handful of serial entrepreneurs. Inbound Labs focuses on helping businesses grow, and they have done so for more than 200 companies.

9. Kexino

Kexino is a French team of marketing, creative, and business development specialists. Their goal is to help start-ups and small businesses produce better, more relevant marketing strategies and tactics. Kexino specializes in services for startups and small-to-medium-sized companies. What they do best is offering a range of integrated marketing services because they believe that’s what companies need today, according to the firm.

With an inspiring blog full of tips and tricks on marketing tactics and business development, Kexino creates an entrusted environment for a startup to grow. The startup marketing agency combines branding, communication, design, SEO, social media, and CRO, with a range of inbound and outbound marketing initiatives.

10.SeeResponse

Are you looking to grow in the B2B industry? This is one of the startup marketing agencies that have great expertise in B2B marketing, along with SaaS Marketing and Lead Generation.  SeeResponse is a full-service B2B marketing agency with offices in the US, the UK, and India. Some of their services include Marketing automation & demand generation, sales operations & CRM support, as well as UI/UX design & development. 

Even if your budget doesn’t allow for a full outsourcing of your marketing activities, SeeResponse also gives you a second option. According to that, if you are looking for a partner solely for execution, SeeResponse could be that partner and let you pull the strategy strings. Last but not least, the agency has won a few awards, such as ‘Best SEO Experts in Washington DC’, and ‘Top Email Marketing Agencies’.

11. Demand Curve

Previously known as Bell Curve, Demand Curve is a San Francisco-based growth consultancy that specializes in helping startups scale through hands-on growth strategy, channel testing, and conversion optimization. As a Y Combinator-backed team, Demand Curve works almost exclusively with early-stage startups – particularly in SaaS and D2C.

Their approach is highly structured, combining performance marketing, funnel analysis, and positioning strategy to drive measurable growth. The startup marketing agency has worked with startups like Segment, Streak, and Perfect Keto.

12. 42 Agency

42 Agency is a Toronto-based marketing firm specializing in demand generation, marketing operations, and revenue operations for B2B SaaS companies. Founded in 2018, the agency focuses on building efficient revenue engines through services like paid media management, SEO strategy, content creation, and account-based marketing.

The agency offers flexible engagement models, providing both strategic guidance and execution support. Notable clients include Smile.io, ProfitWell, and CIN7, with case studies showcasing significant improvements in cost per SQL and overall pipeline growth.

13. UseKaya

UseKaya is a startup-focused performance marketing agency based in London, designed to help early-stage and growth-stage companies scale with speed and efficiency. Their model blends experienced marketers with AI-powered tools, giving startups access to both strategic guidance and streamlined execution.

Kaya offers campaign management, creative production, and analytics under one roof, making them a practical choice for startups that want to test and scale paid channels quickly. Their platform also gives founders and marketing leads full visibility into results, spend, and next steps.

14. G2M Team

G2M Team is based in Israel and works exclusively with tech startups. Their focus is on helping early-stage companies, from stealth to post-Series A. With services ranging from messaging and positioning to content, outbound, and lead generation, this startup marketing agency offers both strategic and executional support.

Their team includes experienced marketers who step in as a hybrid of fractional CMO, growth strategist, and hands-on operator. This mix is ideal for startups that need traction without the overhead of a full in-house team or the delays of hiring and onboarding multiple specialists.

15. DemandMAven

DemandMaven is a growth consultancy based in Atlanta that helps early-stage startups, particularly in SaaS, figure out how to acquire their first 100 to 1,000 customers. Led by Asia Orangio, an ex-HubSpot marketer and advisor to countless founders, DemandMaven focuses on go-to-market strategy, customer research, and channel prioritization.

Unlike execution-driven agencies, DemandMaven works effectively as a fractional CMO. Accordingly, it works closely with founders to define their growth model, optimize onboarding, and tighten product–market fit. Their process is especially valuable for startups that are pre-revenue, navigating early traction, or preparing for funding milestones.

Top Startup Marketing Agencies – Epilogue

Finding the most suitable partner and establishing a fruitful relationship is up to you!

When 9 out of 10 startups fail, you know how hard it can get.

Always do your homework before you talk with any of these startup marketing agencies. Prepare a basic plan including your goals (what you want to achieve). You need to be determined to change your mindset. For example – 

• Do you know what your goals are – or should be?
• Are you ready to split your time 50-50 between product development and getting traction?
• Do you have at least one person in your team committed to growth?

Similar to startup marketing agencies, you can also think about working with a startup consulting firm.

If your startup is in the SaaS industry, you can also consider working with a SaaS marketing agency.

Regardless, it would be a good idea to follow these 6 steps before hiring a consultant.

Either way, set clear expectations and decide what the right agency is for you.