Growth Marketing - without the guesswork.

You don't need another agency pitching inflated numbers that don't connect to your bottom line. If you can't trace your marketing spend to business outcomes, something's broken.

I bring both the experience and diligence to diagnose what's not working and build the system that does.

Ready when you are.

You'd be in good company

About Me

Built on curiosity and driven by impact.

Ben Güthlein
Performance Marketing & Growth Expert

When companies are looking to grow faster, smarter, or more efficiently - they bring me in.

With 12+ years driving performance marketing and growth across B2C, D2C, e-commerce, B2B, and mobile apps, I work as an embedded partner: hands-on, accountable, and fully aligned with your growth goals.

Having led teams and built systems that turn marketing spend into measurable, scalable results, I work as an embedded partner for startups finding their footing, scale-ups accelerating growth, and established companies ready to push harder.

If you're looking for a senior marketing leader who thrives in fast-moving environments and knows how to make your marketing budget count, let's talk.

Let's talk

Collaboration

As experienced T-shaped marketer my services range from marketing team leadership and strategy to hands-on support and execution in paid media.

Interim & Fractional Manager

Senior leadership, when and how you need it: CMO, Head of Marketing, Growth Lead or however you call it.

I provide Interim leadership of growth or performance marketing teams during startup and transition phases.

Or if budget is tight - strategic marketing leadership engaged fractionally (=senior expertise without the full-time commitment).

Freelancer

Strategy and execution, in one pair of hands.

I embed directly into your team to own and deliver specific growth marketing workstreams: paid acquisition, tracking and reporting, performance audits, CRO and many more.

I bring the strategic thinking to prioritize what matters and the hands-on execution to get it done.

Consultant / Advisor 

Strategic clarity when the path isn't obvious.

I work with founders, CMOs, and marketing teams to diagnose growth challenges, stress-test marketing and campaign strategy, and build the roadmap to fix what's broken.

Engaged on a project or retainer basis - thinking and guidance without the full-time cost.

Coach / Mentor

Sharpening the person running the machine.

For marketing leads and professionals looking to level up. Whether that's making better decisions with data, navigating a new channel, or stepping into a more senior growth role with confidence.

Part challenger, part sounding board, fully in your corner.

What others say

Don't take my word for it, see what previous clients have to say about their experience. Real words from real people.

"Ben has done an outstanding job as Interim Director of Performance Marketing. He has practically single-handedly built up the Paid Social division and taken it to a whole new level. What sets Ben apart is his exceptionally deep technical expertise: Whether it’s complex tracking, attribution models or highly efficient automation via Zapier and Make – he has a perfect grasp of the full spectrum of modern marketing.
His approach is always clear, calm and strictly data-driven. A wholehearted recommendation for any company seeking genuine performance expertise on an interim basis!"

Benjamin Ronnenberg
E-Commerce Founder

"I had the pleasure of working closely with Ben at Tomorrow Education Group, where he led Paid Social across several ventures. Ben built and scaled our paid social engine from the ground up – from account structure and tracking to creative testing and weekly performance routines.

He has a deep, hands-on understanding of Meta, TikTok and LinkedIn Ads and knows how to translate business goals into clear performance targets. Ben is excellent at combining data and creativity: he uses numbers to prioritise, but he also knows which angles, hooks and formats actually make people stop scrolling and convert.

What I appreciated most was his ownership mindset. Ben proactively identified growth opportunities, cleaned up legacy setups, and constantly pushed for better attribution and more reliable reporting. He communicates clearly with founders, sales and product, and can explain complex performance topics in a way everyone understands.

On a personal level, Ben is calm, reliable and fun to work with – a team player who gives honest feedback, listens carefully, and shows up when it matters. I would happily work with him again and can highly recommend him as a Head of Paid Social or Performance Lead in any ambitious, fast-moving organisation."

Felix Grabowski
Chief Growth Officer | Tomorrow Education Group

"Ben supported our Innovation Studio for about 1 year. He built the entire performance marketing setup for our digital product (productivity app, subscription business model), developed meaningful metrics, and also took over the operational management of Google Ads, Instagram, Facebook, Twitter, and Linkedin Ads. I especially appreciated his great expertise. His decisions were always well-founded and coordinated with us. His work was always very well organized, fast, and reliable."

Christian Wolf
Head of Innovation | LAMY

"It was fantastic to work together with Ben, who has exceptional expertise in performance marketing.
His hands-on approach, consulting and strong understanding of social media and digital marketing were keys to success for our team.
He is not only a reliable and forward thinking Growth Consultant but also an inspiring team player.
I would recommend him for his expertise and innovative ideas and look forward to an opportunity to work with him again."

Sara Ripken
Head of e-Commerce | Clasen Bio

"I have been working with Ben for the last four months and can highly recommend him as a performance marketing expert (NPS=10 :-)). For an e-commerce project he helped us set up paid social ads and paid search ads (including intuitive tracking in Google Data Studio). I am super happy with the results and his way of working/communicating."

Julius Patzelt
Managing Director | wattx by Viessmann

“Ben has been instrumental in setting up new performance channels for us. He’s prepared to go above and beyond the call of duty, with proactive suggestions and a strong focus on results. I’d be happy to recommend him to any early stage companies wanting to go from 0 to 1 in their performance marketing.”

Neel Popat
Founder & CEO | Popcorn Mobile

"Ben was incredible to work with and was a huge game changer for a localization project we ran with him. He quickly got up to speed on our products and the paid search opportunity in front of us. In a short amount of time he outlined strategies that would help boost our outcomes; while interfacing seamlessly with our internal and external resources including a local agency, to drive performance gains. I'd gladly recommend working with Ben to anyone needing a sharp, driven paid search strategist who is an incredibly accomplished project manager."

Bryce Roberts
Director Demand Gen | Solarwinds

"Ben was our rockstar in the Performance Marketing team from June 2020 to Jul 2022. He established new processes and initiated innovative measurements to improve our performance in conversions, cost controlling and reporting. He showed incredible results in the area of customer acquisition, where TILCRA received an uplift of 85% in just 3 months. Ben is a power house and unmachted expert in his area. We had a lot of fun and success the same time. We would always hire Ben again!"

Martin Rösch
Managing Director | TILCRA

"Ben is one of the most knowledgeable online marketers I know. He is very structured and he's got great analytical skills and attention to detail. I learned a lot from Ben by working by his side. He is a great team player, I'll be more than happy to work together with him again in the future!"

Adrian Sarasa
User Acquisition Director | letgo

"I'm impressed with Ben's outstanding readiness to perform. He built up several Google Adwords accounts from scratch and lead them to great success in terms of revenue growth and ROI. He possesses excellent technical knowledge, great patience and a data-driven approach when solving complex problems in SEM and other Online Marketing channels."

Matthias Schmidt
Head of Online Marketing | HomeToGo

"As a marketing executive, I come in contact with a lot of online marketing freelancers - and when it comes to e-commerce and digital marketing, Ben is one of the best I've met. We've worked together on several online channel projects at FinLInk, and aside from his skill set, what I appreciate most is how reliable and responsive Ben is. He is great for our development and always delivers an amazing result.

Toke Bransky
Marketing Lead | FinLink

"Ben's one of the best. Highly reliable, top quality ad optimization. If the job is of high importance, then you have found the right guy."

Quentin Muhlert
Founder | Muhlert Digital

"Ben is an amazing performance marketeer! He is highly skilled, very structured, communicates perfectly and brings value immediately. I highly recommend working with him and we will certainly do so ourselves!"

Marc Philipp Clemens
Founder, CEO | CodeControl & 9am

"Ben supported us on early-stage a mobile app project with his expertise in performance marketing by planning the campaigns, setting up tests & managing our Facebook ad account. We were very happy with Ben's work and look forward to working with him in the future."

Roland Grenke
Co-Founder | Dubsmash

"I'm working with Ben for a while now and I'm impressed of his diligent, hands-on and execution driven work. Not only a highly skilled marketing professional, but also a great person to work with. Unlike many Marketing freelancers, Ben does focus on delivering fast results and save time where possible rather than "selling" his hours. Looking forward to continue working with Ben."

Başar Caniperk
Founder & CEO | LoanLink24 & Sachkundegurus

"Ben spontaneously helped us out in the agency as a performance freelancer (social-advertising). We were super happy with Ben's work. He was super competent, very senior and knows his business! I am looking forward to hopefully working with him again soon!"

Eric Linke
Senior Project Manager | TLGG

Expertise

From first click to loyal customer.

Performance Marketing & Growth Strategy

  • Turning ambiguity into strategy
    Structuring growth from the ground up across infrastructure, channels, and messaging.
  • Connecting data to decisions
    Using performance insights to refine budget distribution and channel mix.
  • Bridging teams around a shared goal
    Aligning internal stakeholders toward unified marketing outcomes.
  • Owning the full user journey
    Mapping and optimizing every touchpoint from awareness to conversion.
  • Building for scale
    Designing marketing systems that grow with the business, not just the next campaign.

Marketing Team Leadership

  • Leading with empathy and data
    Balancing people-first management with performance insights to drive team decisions.
  • Enabling ownership and accountability
    Empowering team members to take initiative and own their results.
  • Fostering a culture of trust
    Creating psychological safety where ideas, feedback, and mistakes drive growth.
  • Coaching over directing
    Developing individual strengths and guiding careers rather than micromanaging.

Demand & Lead Generation

  • Optimizing the demand generation funnel
    Balancing lead quality and volume across upper, mid, and lower funnel.
  • Defining KPIs and attribution
    Built for the complexity of long sales cycles.
  • Aligning performance marketing with sales
    Syncing strategies, processes, and feedback loops.
  • Account-based Marketing (ABM)
    Targeting high-value accounts with precision.
  • ntegrating paid channels with CRM
    Seamless sync with Salesforce, HubSpot, Pipedrive, and more.

E-Commerce Growth

  • Acquiring and reactivating customers
    Targeting new audiences while re-engaging lapsed ones, boosting CLTV.
  • Managing and optimizing product feeds
    Seamless sync across merchant centers and ad platforms.
  • E-Commerce Paid Social and PPC
    Campaigns built around product discovery and purchase intent.
  • Google and Bing Shopping
  • Dynamic Retargeting
    Re-engaging product viewers, cart abandoners, and past purchasers with tailored content.

Mobile App Marketing

  • Mobile user acquisition
    Driving installs, in-app conversions, and retention with a clear eye on ROI and LTV.
  • Mobile tracking and 3rd party attribution
    Including post-IDFA solutions (SKAN / SKAdNetwork) and tools like AppsFlyer and Adjust.
  • Google App campaigns (formerly UAC) and Apple Search Ads
    From setup and structure to bidding and scale.
  • App Store Optimization (ASO)
    Maximizing visibility and conversion across Google Play and the App Store.
  • Mobile fraud detection and prevention
    Protecting budgets and data integrity from acquisition fraud.

Marketing Automation & AI

  • Campaign automation and tooling
    Scripts, systems, and real-time alerts to streamline campaign management, funnel optimization, and reporting.
  • AI-powered creative production
    Ad creatives, UGC-style content, and video assets generated and iterated at speed.
  • AI-assisted copywriting
    High-converting ad copy, landing pages, and email sequences produced and tested at scale.
  • Lead enhancement and enrichment
    AI-driven scoring, data enrichment, and nurturing workflows to improve quality and maximize conversions.
  • Audience and competitor intelligence
    Social listening, review mining, and competitor analysis to surface trends and sharpen positioning.

Search engine advertising
(SEM / SEA / PPC) 

  • Full search engine coverage
    Google, Bing, Apple Search Ads, Yahoo, Yandex
  • Keyword strategy and campaign architecture
    In-depth research, match type management, and structured builds to capture demand at every funnel stage.
  • Campaign optimization
    Smart bidding, budget pacing, ad copy testing, negative keyword management, and search term analysis to hit targets and eliminate wasted spend.
  • Audience and intent layering
    Combining search intent with audience signals, remarketing lists, and demographics for sharper targeting.
  • Landing page alignment
    Ensuring ad messaging, keywords, and landing pages work in sync to maximize conversion rate.

Paid Social Media Advertising 

  • All important social networks
    Meta (Facebook, Instagram, Threads) LinkedIn, TikTok, YouTube, Pinterest, Snap, Reddit, X, and niche platforms.
  • Goal-oriented paid social campaigns
    Audience-first advertising built around business objectives, not just platform metrics.
  • Full-funnel social execution
    Connecting awareness, consideration, and conversion in one coherent strategy.
  • Creative strategy and iteration
    Briefing designers, leveraging AI tools, and systematically testing for performance.
  • Conversion API integration
    Server-side tracking for reliable signal quality in a cookieless world.

Tracking & Attribution 

  • Conversion tracking & Analytics
    Reliable setup across platforms, tags, and Analytics tools, such as GA4.
  • Privacy-compliant and cookieless tracking
    Navigating GDPR and cookie consent with server-side solutions (e.g. server-side GTM).
  • Tag management
    Handling tags for product feeds, audience creation, and dynamic remarketing via GTM or Segment.
  • Attribution modeling
    AI-powered, multi-touch and cross-platform attribution, as well as customer lifetime value analysis.
  • Statistically reliable testing
    A/B, multivariate, and incrementality tests across creatives, landing pages, targeting, and channel uplift.

Marketing Reporting

  • Querying and unifying marketing data
    Handling SQL, ETL pipelines, and databases to pull all relevant sources into a single, reliable foundation.
  • Building performance dashboards
    Designing and creating dashboards that track KPIs and drive data-driven decisions.
  • Visualization in Data Studio, Tableau and beyond
    Turning complex data into clear, actionable insights.
  • Automated Reporting Agents
    Scheduled report generation, anomaly alerts, natural language summaries from marketing data.

Let’s make things happen

Every engagement starts with a conversation. Tell me where you're stuck — and let's figure out if I'm the right person to help.

Get in touch

Client stories

A curated selection of projects that moved the needle and made their mark.

15x-ed letgo's mobile user acquistion to become the fastest growing app in the US 2016-2017

Lead the global Paid Search Marketing efforts and was directly responsible for a 6 person team 7-digit monthly advertising budget.

85% uplift in new customers at stable CPA within 3 months for D2C E-Commerce TILCRA

Utilized a channel strategy tailored to the shop’s niche audience consisting of hyper-targeted campaigns on Google Ads, Facebook & Instagram.

Cut CPQL by 70% in 6 months while scaling qualified leads by 600% for Zenjob's B2B leadgen​

Combining a complete Google & Linkedin Ads account restructuration with ABM measures and personalized ad content.

Work approach

For project and execution-based engagements, here's how we typically work together.

We start with a conversation. I take the time to understand your business, your goals, and where your current marketing efforts are falling short. No pitch, no assumptions — just the right questions to make sure we're aligned before anything else begins. This will allow us to understand your specific needs and tailor my services to best fit your requirements.

So you've made it this far

Consider this your sign to connect and discuss your marketing needs.