In brief: Three firms stand out in 2026. Deux.io suits startups, SaaS companies and e-commerce businesses, both B2B and B2C, that want to accelerate their acquisition and revenue. Bulldozer Collective is aimed at scale-ups, SMEs and large accounts looking for a senior growth team tied to revenue. Markentive is the choice for B2B companies that want to make HubSpot the engine of their marketing and sales growth. The next seven cover experimentation, international expansion, SEO and lead generation.
- Deux.io: For B2B or B2C startups, SaaS companies and e-commerce businesses that want to accelerate their acquisition and revenue.
- Bulldozer Collective: For scale-ups, SMEs and large accounts that want a senior growth team capable of linking marketing to revenue.
- Markentive: For B2B companies that want to make HubSpot the engine of their marketing and sales growth.
- Datashake: For companies that want to structure and manage their acquisition, particularly internationally.
- Welyft: For e-commerce, retail, luxury or SaaS brands that want to structure their experimentation and increase their conversion.
- Growth Room: For B2B or B2C companies that want to structure their acquisition across ads, outbound prospecting and SEO.
- Uclic: For B2B companies that want a managed growth system without hiring or juggling several providers.
- YATEO: For advertisers and marketing departments that want measurable digital growth, from acquisition to redesigning their website.
- Growth Consult: For very small businesses, SMEs, startups and B2B companies that want to structure their growth rather than pile up isolated actions.
- Webconversion: For B2B companies that want to generate qualified leads via Google, AI and ads.
Updated on 4 November 2026.
Why hire a growth marketing consultant in 2026?
Acquisition budgets keep rising. According to the 35th Observatoire de l'e-pub (e-advertising observatory) by SRI and Udecam, produced with Oliver Wyman and published in February 2026, the French digital advertising market reached €12.4 billion in 2025, up 11%. Social is its main driver: it accounts for 34% of the market, fuelled by video.
This market is becoming concentrated. The same observatory reports that 8 global players capture around 76% of revenue. For a business leader, this means more competitive auctions, platforms that frequently change their rules and acquisition costs that are hard to keep under control without a method. Growth marketing addresses this problem: test quickly, measure, keep what pays off.
Buyers nonetheless have specific concerns. Paying for tests that deliver nothing. Receiving flattering dashboards that are disconnected from revenue. Depending on a provider that holds on to the access and the know-how. A good consultant is therefore judged less by their promises than by the way they measure, document and pass on knowledge.
How did we choose these 10 consultants?
This ranking is based solely on what each company publishes itself (its website, its methodology and reference pages), as read at the time of the update. Four criteria counted:
- Link to revenue: We selected firms that steer their actions by business metrics, not by clicks or impressions.
- Experimentation method: Every firm ranked applies a clear process for formulating hypotheses, testing and deciding.
- Clear specialisation: We favoured players whose positioning clearly states which type of company and problem they address.
- Public evidence: Published case studies, references and content had to make it possible to verify the claimed expertise.
The 10 Best Growth Marketing Consultants in France (2026)
1. Deux.io
Deux.io is a growth hacking and web marketing agency based in Paris. It helps ambitious entrepreneurs make their revenue take off through growth marketing. Its offering covers conversion-focused SEO, SEA, social ads, automated and personalised prospecting, and an iteration method to validate your Product Market Channel Fit in 8 weeks. The agency tests its methods on its own tools before rolling them out at scale for its clients.
Strengths:
- Over 600 companies supported since 2012
- Publisher of its own prospecting and data enrichment tools
- References cited: Weglot, Majelan, Cybertek, Altaroc, TeamViewer
Who it's for: For B2B or B2C startups, SaaS companies and e-commerce businesses that want to accelerate their acquisition and revenue.
2. Bulldozer Collective
Bulldozer Collective brings together senior marketing experts augmented by AI, plugged into your organisation to drive acquisition from lead to revenue. Its full-funnel approach covers demand generation (ABX, paid social, AI-powered content), demand capture (SEO, AEO, GEO, SEA 2.0, CRO) and revenue generation (attribution, pipeline optimisation, marketing and sales alignment). It relies on its own tools such as Data:Pilot, ABX Machine, Content:Scale and Hyperlocal-AI, with skills transfer to your in-house teams.
Strengths:
- Structured full-funnel approach, from demand generation to revenue
- Proprietary AI tools for attribution, ABM and content at scale
- Case studies with figures for Mooncard, Orus, Payfit, Korben and Adecco
Who it's for: For scale-ups, SMEs and large accounts that want a senior growth team capable of linking marketing to revenue.
Visit the Bulldozer Collective website
3. Markentive
Markentive presents itself as the CRM integrator that serves your growth. The agency deploys HubSpot, connects your CRM to your IT ecosystem and adapts your SalesOps and data processes. It also offers growth marketing support to boost your performance and the ROI of your marketing activities, as well as web design focused on user journeys. Its consultants have between 3 and 15+ years of expertise in CRM, marketing and sales operations. It relies on robust methodologies, with design workshops followed by technical implementation.
Strengths:
- HubSpot Elite Partner, accredited partner since 2013
- Rated 5.0 from over 500 client reviews
- Sector expertise: finance, SaaS, industry, IT services, education, NGOs
Who it's for: For B2B companies that want to make HubSpot the engine of their marketing and sales growth.
4. Datashake
Datashake presents itself as a digital acceleration group based in Paris and New York. Its teams define and manage your digital strategy around five offerings: SEA and SMA, GEA on ChatGPT and generative AI, SEO and GEO, an AI creative studio, and tracking and data. AI is built into the heart of its processes. Trade-offs follow your business objectives: acquisition, profitability, customer value. The agency works as an extension of your teams, with a coordinated and genuinely 360° strategy.
Strengths:
- Over 1,000 advertisers supported, over €500m managed
- Member of the Google Partners International Growth Program
- Case studies with figures: Société Générale, Celio, Alan, SwissLife
Who it's for: For companies that want to structure and manage their acquisition, particularly internationally.
5. Welyft
Welyft is a data marketing agency based in Paris. It optimises digital journeys to boost ROI and conversion rates. Its offering covers six pillars: experimentation, UX, personalisation and CRM, data and analytics, training, and agentic commerce. Its method, Conversion Intelligence, pairs a CRO expert with a fleet of specialised AI agents. Each agent covers one stage of the cycle, from the UX audit to the end-of-test report. Humans make the calls; the agents execute at scale.
Strengths:
- Complete CRO cycle, from audit to end-of-test report
- AI agents managed by human CRO experts
- Testimonials from Etam, Salomon, Aroma-Zone and Groupement Mousquetaires
Who it's for: For e-commerce, retail, luxury or SaaS brands that want to structure their experimentation and increase their conversion.
6. Growth Room
Growth Room is an agency of growth marketing experts based in Paris. It specialises in three acquisition verticals: paid media campaigns (Google, Meta, LinkedIn, ChatGPT Ads), semi-automated digital prospecting through to HubSpot CRM management, and SEO, including GEO to get recommended by AI. The team adapts its methods to each company and its market. In thirty minutes, an expert will tell you where to start based on your objectives.
Strengths:
- Over 150 companies supported, according to its website
- HubSpot partner, CRM and RevOps expertise
- Case studies with figures: Walygator, Zest Planche, Weem, Vitalrest
Who it's for: For B2B or B2C companies that want to structure their acquisition across ads, outbound prospecting and SEO.
7. Uclic
Uclic presents itself as a B2B and AI growth marketing agency. A senior team integrates with yours across three pillars. Inbound to capture demand: SEO, Google Ads, Meta Ads, LinkedIn Ads and content. Outbound to create it: cold email, LinkedIn prospecting, cold calling, ABM. And finally AI and development: AI agents, n8n and Make automations, CRM, dashboards. The method follows four steps over a ninety-day framework, starting with a free strategic audit.
Strengths:
- Inbound, outbound and AI combined in a single senior team
- Four-step method, starting with a free audit
- Actions measured by pipeline and revenue, not clicks
Who it's for: For B2B companies that want a managed growth system without hiring or juggling several providers.
8. YATEO
YATEO presents itself as your digital growth partner agency, based on place de la Bastille in Paris for twenty years. It offers strategic consulting, acquisition (SEO, SEA, social ads, CRO, data analytics and tracking) and the design of websites, e-commerce sites, apps and business tools. Each project is approached without a ready-made solution, with a tailored response focused on return on investment. The agency analyses your objectives from the very first call and champions a human, smooth and transparent collaboration.
Strengths:
- Fully ROI-driven approach, with a performance-based pricing model mentioned
- Published case studies for BNP Paribas, Havas Voyages, Christofle, Esthederm
- Acquisition and platform design under one roof
Who it's for: For advertisers and marketing departments that want measurable digital growth, from acquisition to redesigning their website.
9. Growth Consult
Growth Consult is a growth consultancy founded in 2012 by Mehdi Naceri. Its principle: what you lack isn't marketing, it's a growth system. The method rests on five pillars, from strategy and the ideal customer through to retention, via acquisition, AI, automation and conversion. Each pillar is measured so that decisions are based on numbers. Three formats are on offer: coaching, support and full management. On top of that come training courses and more than a hundred bespoke AI agents.
Strengths:
- Five-pillar method with measured results, from acquisition to retention
- More than a hundred bespoke AI agents run by the consultant
- Trainer since 2009, guest lecturer at several schools
Who it's for: Very small businesses, SMEs, startups and B2B companies that want to structure their growth instead of piling up isolated actions.
Visit the Growth Consult website
10. Webconversion
Webconversion is a Lyon-based digital marketing agency, 100% B2B and 100% focused on customer acquisition, founded in 2017. It makes you visible on Google and in AI tools through SEO and GEO, then amplifies your results with Google Ads, LinkedIn Ads, Meta Ads and ChatGPT Ads campaigns managed on a cost-per-lead basis. The agency rounds this out with inbound marketing, Account Based Marketing, content marketing and HubSpot integration to guide every visitor all the way to the sales meeting.
Strengths:
- More than 220 B2B clients supported, according to the agency
- Structured GEO offering since early 2025
- Certified HubSpot partner, tracking leads through to signature
Who it's for: B2B companies that want to generate qualified leads via Google, AI tools and Ads.
Visit the Webconversion website
The 10 Compared in One Table
| # | Company | Who it's for | Key strength | Website |
|---|---|---|---|---|
| 1 | Deux.io | Startups, SaaS companies and B2B or B2C e-retailers that want to accelerate their acquisition and revenue. | Over 600 companies supported since 2012 | deux.io |
| 2 | Bulldozer Collective | Scale-ups, SMEs and large accounts that want a senior growth team able to link marketing to revenue. | Structured full-funnel approach, from demand generation to revenue | bulldozer-collective.com |
| 3 | Markentive | B2B companies that want to make HubSpot the engine of their marketing and sales growth. | HubSpot Elite Partner, accredited partner since 2013 | markentive.com |
| 4 | Datashake | Companies that want to structure and manage their acquisition, particularly internationally. | Over 1,000 advertisers supported, over €500m managed | datashake.fr |
| 5 | Welyft | E-commerce, retail, luxury or SaaS brands that want to structure their experimentation and increase their conversion. | Complete CRO cycle, from audit to end-of-test report | welyft.com |
| 6 | Growth Room | B2B or B2C companies that want to structure their acquisition across Ads, outbound prospecting and SEO. | Over 150 companies supported, according to its website | growthroom.co |
| 7 | Uclic | B2B companies that want a managed growth system without hiring staff or juggling several providers. | Inbound, outbound and AI combined in a single senior team | uclic.fr |
| 8 | YATEO | Advertisers and marketing departments that want measurable digital growth, from acquisition to a website redesign. | Fully ROI-driven approach, with a performance-based pricing model mentioned | yateo.com |
| 9 | Growth Consult | Very small businesses, SMEs, startups and B2B companies that want to structure their growth instead of piling up isolated actions. | Five-pillar method with measured results, from acquisition to retention | growthconsult.net |
| 10 | Webconversion | B2B companies that want to generate qualified leads via Google, AI tools and Ads. | More than 220 B2B clients supported, according to the agency | webconversion.fr |
What should you check before signing?
- Ask who will actually work on your account and how experienced they are.
- Insist that the ad accounts, tools and data remain in your name.
- Have the success metrics defined in writing, linked to your revenue or your qualified leads.
- Check the commitment period, the exit terms and what you receive at the end of the engagement.
- Call at least one reference client close to your sector and size.
So Where Does Esekai Fit In?
Esekai does not feature in this ranking, as it is not a growth marketing consultancy. It is a Paris vertical video studio founded by Tony Lo: creative ads, UGC, organic content for TikTok, Instagram Reels and YouTube Shorts, and TikTok Ads and Meta Ads campaigns. More than 350 brands supported in 3 years. Consultants build the growth system; Esekai supplies the videos that fuel it. Discover Esekai.
Conclusion
The best consultant isn't the best known. It's the one who understands your model, measures what matters and leaves you more self-sufficient at the end of the engagement. Start from your main need, compare three profiles from this ranking, then check each point before signing. You'll make your choice with greater peace of mind.
Honourable Mentions: 10 More Worth Knowing
| Company | Who it's for | Website |
|---|---|---|
| Variant Marketing | Lyon-based, local or B2B companies that want to generate qualified, measurable prospects. | variant-marketing.fr |
| Inbound Value | B2B companies that want a steady stream of qualified meetings through content and inbound marketing. | inboundvalue.com |
| Cartelis | Companies that want to turn their customer data into a lever for acquisition, conversion and loyalty. | cartelis.com |
| Growth Hackerz | B2B companies, particularly SaaS, that want to generate qualified meetings with decision-makers. | growth-hackerz.fr |
| Uplix | Brands that want to accelerate their acquisition by combining SEO, paid advertising and data. | uplix.fr |
| Growth Canal | B2B companies that want to generate qualified leads and structure their HubSpot CRM. | growthcanal.fr |
| Connexion | Brands, e-retailers and retail chains in Belgium and France that want a single partner to manage their growth. | connexion.agency |
| Hack'celeration | Startups and large groups alike that lose time on repetitive tasks and want to automate their growth. | hackceleration.com |
| Let's Growth | B2B companies that want to outsource their prospecting or train their sales teams. | letsgrowth.fr |
| Pilot'in | Companies that want to connect their website, brand and acquisition with hands-on, local support. | pilot-in.com |
Does your company deserve a place in this ranking? Write to us at contact@esekai.fr: we read every submission.
Our Other Rankings
- The 10 Best Brand Strategy Consultants in France (2026)
- The 10 Best Google Ads Consultants in France (2026)
- The 10 Best SEO Consultants in France (2026)
- The 10 Best Cold Email Software Tools in France (2026)
- The 10 Best Lead Generation Content Creators in France (2026)
- The 10 Best Email Marketing Software Tools in France (2026)
Frequently Asked Questions
- What is the difference between a growth marketing consultant and a traditional marketing agency?
- A traditional agency often executes one specific lever, such as SEO or advertising. A growth marketing consultant looks at the entire customer journey, from acquisition to retention. They formulate hypotheses, test them and keep whatever drives revenue growth. Their value lies in method and measurement rather than the volume of actions.
- Is growth marketing suitable for SMEs or only for startups?
- It suits SMEs too. Several consultancies in this ranking, such as Bulldozer Collective and Growth Consult, work with SMEs and very small businesses. The prerequisite is having a validated offering and data to work with. Without customers or a track record, it's better to work on your positioning first before trying to accelerate acquisition.
- How do you choose between the consultancies in the ranking?
- Start from your main need. For a HubSpot CRM, look at Markentive. For international growth, Datashake. For conversion optimisation, Welyft. For B2B leads via Google and AI tools, Webconversion. Then compare the profiles on offer, the reporting method and references in your sector. A scoping call is often enough to decide.
- Do you need to produce content as well as hiring a consultant?
- Often, yes. The consultant designs the tests and runs the campaigns, but they need creatives to test. According to the 35th Observatoire de l'e-pub (digital advertising observatory) by SRI and Udecam, social, driven by video, was the leading growth driver of digital advertising in France in 2025. A steady flow of video ads makes your experiments faster and more reliable.