Marketing that turns complex products into category leaders.

AI-Native Marketing & GTM support for Seed to Series A

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  • StackOne logo with a stylized cube icon and the text 'StackOne' in white on a black background.
  • Logo for Otta, a job search and employment platform, with a circular icon and stylized text.
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  • Clue logo with a geometric symbol on the left and the word 'Clue' on the right, on a black background.
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Your founding extension

I was formed in the start-up trenches, so I’ve lived the late nights, the pivots and the pressures of raising capital and delivering efficient growth yesterday. Grounded in rigour, sharpened by discipline and flexible by nature, I slot in seamlessly to your team, handling your brand’s trust, visibility and momentum so you can stay focused on building amazing products.

  • AI-Native Marketing Systems

    I build AI systems that do the production work of a full marketing team, so you get senior output without the headcount.

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    Go to Market Strategy and Execution

    I refine your positioning, your messaging and the go-to-market motion to prove it, then execute with you every step.

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    Founder and Executive-Led Growth

    I turn your expertise into content and visibility that accelerate deals, attract talent and convince investors.

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    Embedded Marketing Leadership

    I lead your marketing end-to-end, with senior judgment at the table from the first campaign to your next raise.

The marketing engine behind your next raise

AI-native production with senior judgment on every call that matters.

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How I help you succeed

Positioning & GTM Sprint

Four weeks for a fixed fee, where we build the positioning, ICP, messaging and the go-to-market plan your deck, website and outbound will run on.

GTM System & Leadership

I run your go-to-market as your senior marketing lead, with agents doing the production, so you get a full-funnel engine without the headcount.

Playbooks & System Handover

When everything is running successfully, I hand over the systems, playbooks and dashboards to you, so the engine keeps working without me.

  • A woman with curly dark hair, glasses, earrings, and a striped top smiling indoors.

    “Citadelle has been an extension of our marketing team for a year and a half, supporting us in telling a highly technical story to a complex prospect and customer base across the entire funnel. Diandra served as our Head of Marketing and quickly became a valuable resource for the business, collaborating effectively across our GTM and Product functions. She also supported us through our $20M Series A and helped deliver over 500% growth on key LinkedIn channels, which have become a reliable source of leads.”

    Romain Sestier,

    CEO and Co-Founder at StackOne

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    We’ve been working with Citadelle on an expansive B2B2C Go-to-Market strategy for a new Product: from designing the market and stakeholder research, to developing the channel strategy and executing on key marketing channels, Diandra and Camilla have been extremely diligent, detailed and showed domain expertise from the very beginning. Their attention to detail and care for our mission and vision is inspiring and we’re glad to have been introduced at the ideal time!”

    Balint Veres,

    Chief Finance Officer at Clue

  • A man with curly dark hair, glasses, and a beard, wearing a dark green sweater, sitting indoors in front of a white wall with a plant visible in the background.

    “Diandra came in to support us while we recruited a full time brand and content lead. She was an absolute godsend, quickly grasping our challenges, sector and internal processes. She slotted right in. I appreciated her calm structured approach and the ideas she brought to the table. We worked together on an influencer campaign, a brand activation event and she led our LinkedIn strategy with great results. I highly recommend Diandra for anyone looking for someone who’s both strategic and operational - an extension of your marketing team!”

    Holly Coxell,

    Head of Marketing at London Women’s Clinic

  • "Working with Citadelle has been transformative for our marketing efforts. More than plugging resource gaps, they built a complete program for us. Over the last few months they audited our LinkedIn presence and designed thought leadership strategies for our executives that translated complex HR Tech themes into accessible insights. They led the creative and logistics around an important campaign, ran podcasts and webinars, producing content plans, registration pages and follow‑up sequences, and made sure our event calendar – from in-person dinners to industry conferences – had a clear narrative and outreach plan. We even developed a new ICP together so we could communicate effectively with the right stakeholders, and the team went above and beyond to introduce us to relevant contacts. By the end of the engagement we had a repeatable marketing engine, better brand recognition and a toolkit we can run with. Citadelle’s strategic thinking and hands‑on execution have given us confidence in our next stage of growth."

    Howard Flint, CEO of AMP Strategists

FIT

We’re a good fit if

  • You've raised a Series A or are about to, and the product is selling

  • You have no senior marketer and don't want to hire one yet

  • You'll give me the founder's time: two hours a week

We’re probably not a good fit if

  • You want leads in weeks and don't yet know who buys or why

  • You want an agency to run campaigns you've already decided on

  • You're pre-product or pre-revenue

How can I help? 

Every startup is different. Whether you need strategic guidance or tactical execution, I can help you unlock your untapped growth potential.

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