In the rapidly evolving landscape of entrepreneurship, startups face a unique set of challenges and opportunities. As businesses navigate through competitive markets and seek innovative solutions, effective consulting services have become indispensable. The year 2025 brings forward a new wave of consulting firms specializing in startups, offering tailored strategies that encompass everything from business development to digital transformation.
This guide explores 15 of the most effective startup consulting services designed to empower entrepreneurs. These firms not only bring expertise and experience but also leverage cutting-edge technologies and methodologies that align with the dynamic needs of modern startups. Whether you’re in the ideation stage or looking to scale, understanding the strengths and offerings of these consulting services can be a game-changer for your business trajectory.
In this overview, we will delve into each of these consulting services, highlighting their unique approaches, success stories, and the specific areas they excel in. By the end, you’ll have a clearer understanding of which consulting partners can best support your startup’s vision and growth ambitions in 2025 and beyond.
1. GrowthRocks
Website: growthrocks.com
Established: 2014
Headquarters: London, UK
Tagline: “Sky is not the limit”
Hey, that’s us! *awkward self high-five*
GrowthRocks is a growth hacking marketing agency that helps startups and well-established companies to achieve rapid and sustainable growth. Headquartered in London with worldwide partners from India and Finland to the US and Greece, GrowthRocks is ready to grow your company or startup.
With a blog full of tips, how-to guides, and business development concepts, Growthrocks is the place to get an expert’s guidance and consultation for your startup. GrowthRocks also has a thing for education and training, as the company has created a number of academies throughout the years. Performance Marketing Academy, Content Marketing Academy, and Growth Hacking Academy are some of them.
Moreover, the GrowthRocks team has developed a VC-backed startup called Viral Loops a SaaS platform for referral marketing with a 30% month-after-month growth rate.
2. GrowthGirls
Website: growthgirls.com
Established: 2019
Headquarters: London, UK
Tagline: “Unleash the power of data”
Growthgirls offers its digital marketing services for startups and multinationals alike, and for a number of different industries. Accordingly, they’ve worked with brands such as Oh app, Sundance Film Festival, and Lana Bank.
As the name suggests, the growth marketing agency has a strong feminine side. GrowthGirls is a woman-owned agency that embraces diversity and is looking to empower women and their businesses respectively. And it does so through the services and the growth/ marketing training it provides.
If you’d like to know more about GrowthGirls (and your business), you can try their new quiz to find out your Growth Marketing Score.
Would you like to book a free call with GrowthGirls’ CEO, Effie Bersoux? Book a slot here.
3. Elysian Fields
Website: elysianfields.co
Established: 2021
Headquarters: London, UK
Tagline: “We help founders secure unfair advantages in their pursuit of growth.”
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. Right Side Up
Website: rightsideup.com
Established: 2016
Headquarters: San Fransisco, USA
Tagline: “If you’re looking for a marketing agency, YOU’VE COME TO THE WRONG PLACE”
The tagline of Right Side Up speaks for itself because, indeed, it is not a traditional marketing agency. Right Side Up is “a collective of premium marketing talent—with all of the marketing chops, and none of the agency fluff”. So what does this mean in practice?
Their growth services are separated into 3 basic categories: Digital Marketing, Offline Marketing, eCommerce Marketing.
The former category encompasses three branches of marketing, namely performance, lifecycle, and eCommerce. The second category, offline marketing, is dedicated to helping brands expand offline through podcasts, radio, and even TV. This is where they can help them break into OTT advertising, in collaboration with media buying agencies to support execution. The last category is for those who are interested in getting noticed in Amazon or finding a helping hand to set up and run Shopify, BigCommerce, or any other DTC platform.
5. Galactic Fed
Website: galacticfed.com
Established: 2017
Headquarters: Chicago, Illinois
Tagline: “A growth marketing agency that triples your revenue, not your costs.”
Galactic Fed was built from the data, AI, and growth hacking techniques that launched Silicon Valley’s most iconic brands. Their approach was pioneered by an early team of mathematicians and software engineers, and since 2017, Galactic Fed has helped over 600 companies grow.
Galactic Fed has a results-driven culture, helping companies design the optimal strategy to accelerate user acquisition and increase revenue, including paid media, SEO, content, website creation, email, creative, organic social, customer strategy, and more. Galactic Fed is best for startups, service brands, B2B SaaS, food & bev, consumer, tech, and all companies seeking affordable revenue growth through data-backed campaigns.
6. Growth Hackers
Website: growth-hackers.net
Established: 2016
Headquarters: Taipei, Taiwan
Tagline: “Grow Your Business. Higher. Faster. Smarter.”
Growth Hackers build scalable strategies based on the company’s products and users.
Through the power of -what else- growth hacking, this agency headquartered in Asia does A/B tests, experiments with acquisitions channels, and combines many different digital marketing branches.
In this fashion, Growth Hackers offer SEO and content marketing services, accelerator and funding consultation, startup mentoring, App Search Optimization, PR, and branding services.
7. Deviate Labs
Website: deviatelabs.com
Established: 2014
Headquarters: Los Angeles, USA
Tagline: “Innovative Growth”
Deviate Labs is ‘founded by a Rocket Scientist and a Silicon Valley investment banker.’ It is a growth hacking consulting agency that has worked with companies ranging from bootstrapped startups to billion-dollar enterprises across a number of industries.
Deviate Labs is known for creatively cross-pollinating marketing tactics across industries and swiping emerging growth tactics from small startups and deploying them across large enterprises.
If you have heard of the Dollar Shave Club, you now also know the growth marketing agency responsible for the product’s success.
8. MAD Kings
Website: madkings.com
Established: 2016
Headquarters: Brussels, Belgium
Tagline: “Unlocking your company’s true growth potential using a powerful combination of data, CRO, creative marketing, and automation”
MAD Kings make a case for growth hacking, and agile, full-funnel processes having a higher ROI than “awareness campaigns”. And they are right.
Rapid experimentation, data analysis, creativity, and automation are combined by the agency’s marketers, designers, developers, and data scientists, to grow businesses.
The process of MAD Kings involves a loop of analysis, ideation, prioritization, and execution. Furthermore, they also have their own growth hacking workshop where you can learn how to turn your business into a growth machine quickly.
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9. BAMF Media
Website: bamf.media
Established: 2017
Headquarters: Venice, USA
Tagline: “It’s more than a company… it’s a lifestyle”
BAMF stands for Badass Marketers & Founders. BAMF Media is a full-stack growth hacking agency and an influencer accelerator for founders and executives to build their personal brands. It is one of the most in-demand growth agencies in Los Angeles.
The growth hacking agency had managed to build one of the most successful Facebook marketing groups, counting more than 25,000 members. PS The group is not named after the agency’s name anymore.
BAMF Media is well known for its free ebooks, too, all of which have been awarded as ‘products of the day’ at Product Hunt. So make sure to check out ‘The BAMF Bible,’ ‘The Copywriting Bible,’ and ‘LinkedIn Influencer.
10. Voxturr
Website: voxturr.com
Established: 2018
Headquarters: San Fransisco, USA
Tagline: “Transforming Your Business”
Voxturr’s team is made of more than 20 professionals and experts with a big variety of backgrounds. It’s a growth backing agency that works with startups, SMB’s, and enterprises alike.
Combining out-of-the-box and tailor-made solutions, data-driven approaches, and proven methodologies, Voxturr has collaborated effectively with many different companies and has also written some case studies for some of them.
Marketplace and eCommerce Marketing, B2B lead generation, SaaS product marketing, and marketing automation are some of the things they do best.
11. Proper Expression
Website: properexpression.com
Established: N/A
Headquarters: Washington, District of Columbia
Tagline:B2B Growth Marketing. Properly Done.
ProperExpression is a B2B marketing agency and a Hubspot partner that blends art, data science, and digital innovation to deliver creative solutions to quantifiable problems.
This agency uniquely fuses growth marketing and growth hacking. Rather than just focus on rapid growth at the awareness stage of the funnel, ProperExpression experiments, iterates, and collects data across all channels to develop a growth marketing strategy.
With a results-driven culture and strong emphasis on tracking and data analytics, they work closely with sales teams to push deals across the finish line, maximizing the ROI of every marketing dollar and driving consistent growth.
12. Inbound Labs
Website: inboundlabs.co
Established: 2015
Headquarters: San Francisco, USA
Tagline: “Hubspot with superpowers”
More than 200 companies from over 20 countries have put their trust in this San Francisco-based agency. Inbound Lands is an expert at CRO and -what else- inbound.
The team 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 in over 20 countries.
A dozen of Silicon Valley investors have funded Inbound Labs, which is also a Hubspot Diamond Partner. The growth hacking agency believes in “efficiency, transparency and a good sense of humor.”
13. Growth Hakka
Website: growthhakka.co.uk
Established: 2015
Headquarters: London, UK
Tagline: “Self-perpetuating marketing programs that go viral
Growth Hakka is a growth hacking consultancy based in London, UK. They are experienced in executing successful, data-driven, growth-oriented campaigns for start-ups, small businesses, and larger clients from multi-national household names to unknown brands just launching.
They work to 6 tenets of automation, creative, data, marketing, product, and technology.
From rolling out Hubspot builds to creating animations to hardcore data analysis and A/B tests to Facebook ads to content calendars to eCommerce, they’re an end-to-end full-service agency.
14. Avaus
Website: avaus.com
Established: 2007
Headquarters: Helsinki, Finland
Tagline: “We turn your data into results, at speed”
Avaus is a Finnish company since the mid-’00s with offices in Helsinki, Stockholm, Gdansk, and a new one in Munich. The growth hacking agency is a Nordic leader in data-driven marketing. Avaus helps B2B and B2C marketers drive customer value and marketing effectiveness.
An official GrowthHackers.com partner, Avaus is one of the bigger growth hacking agencies, with more than 150 employees that promise truly personalized marketing because “we all are different.” The teams specialize in many marketing and growth hacking operations, including Business Strategy, Media Services, Marketing Automation, and Content.
Avaus has collaborated with big companies throughout the years. It has helped lots of clients to grow their businesses and the lifetime value of their customers.
15. Rockboost
Website: rockboost.com
Established: 2014
Headquarters: Rotterdam, The Netherlands
Tagline: “Creating Growth”
Located in The Hague, NL, Rockboost is offering its growth hacking services for the last 6 years. Amongst its clients, one can find Cisco, Philips, and Sony.
The agency can help startups find their product/market fit and build an audience. Then, Rockboost can assist them in finding their business North Star Metric and build a growth strategy with that in mind. A pure growth hacking agency, Rockboot combines various data sources and turns them into valuable insights.
Besides its growth hacking services, Rockboost also offers in-house training as well as workshops, not only for professionals but for students, as well. Last but not least, Rockboost can provide custom software solutions.
In 2025, the landscape of startup consulting services is shaped by a blend of innovation, strategic guidance, and tailored expertise. The top 15 consulting firms stand out for their ability to adapt to market dynamics, offering comprehensive solutions in areas such as business strategy, market analysis, funding strategies, and operational efficiency.
These firms leverage advanced technologies and industry knowledge to empower startups, ensuring they not only survive but thrive in competitive environments. As startups increasingly rely on expert insights, the effectiveness of these consulting services will hinge on their ability to foster agility, drive sustainable growth, and navigate the complexities of the modern business landscape.
Investing in the right consulting partner is crucial for startups looking to scale successfully in 2025.