Cleantech teams carry an unfair load. The product is real, the traction is real, and then the same team is expected to be a marketing engine, a sales function, and a brand studio all at once.

Here’s what most “How to Scale Your Startup” articles don’t mention: doing it all internally isn’t sustainable. And honestly, it’s not the best use of time.

The right growth partner can accelerate what matters most.

We’ve compiled a list of five growth partners trusted by cleantech companies across sales, brand, digital presence, PR, and lead generation. Each has delivered measurable results in the climate tech space.

A note on this list. We are CleanTech GrowthLab, and we built this because prospects kept asking us who to talk to at different stages of their growth path, and we would rather give an honest map than pretend we are the only option.

‍Who is this not for?

The partners below are best suited for teams that are ready with a product, know who it’s for, and are ready to scale with a proven go to market strategy and zero wasted budget.

If you’re still in early exploration mode refining your core market, positioning, or experimenting product market fit, this may be something to return to later.

If you’re at an earlier phase, the most valuable progress often comes from hands-on learning, direct customer conversations, and internal experimentation but if you’re ready to capture the market and scale strategically, read on.

Top marketing agencies of 2026

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1) CleanTech GrowthLab

Focus: Full-stack revenue growth for B2B cleantech. Performance marketing, buying signals, and revenue attribution in one system.

At Cleantech GrowthLab, we work exclusively with climate companies to build scalable growth engines.

Founded by Eben Meyer, we bring cleantech expertise together with 12+ years growth marketing experience driving B2B demand through paid media, SEO, AEO, and lead generation.

Most agencies bring sector knowledge or performance marketing capability, but few bring both. None can show your board the CAC, pipeline, and revenue in numbers it needs. We do all three, across three pillars:

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‍Our proven playbooks help teams prioritize high-leverage marketing actions at each stage, from generating pipeline to converting it. We focus on marketing strategy that reaches four core stages of the buyer's journey:

• Reaching high-intent buyers through targeted media and messaging
• Engaging conversion journeys with performance data at the core
• Converting engagement into sales-qualified leads
• Enabling sales with tools that reduce friction and build trust.

Checkout our Cleantech GTM Canvas, which outlines a step-by-step approach to setting up early marketing and sales motions.

Because we work exclusively in cleantech, we understand the urgency, the stakeholders, and the complexity, and there’s no time lost in explaining the intricacies.‍

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2) Earth Onward

Superpowers: GTM Strategy • Founder‑Led Sales Support • B2B Positioning

Earth Onward, led by Blake Newcomer, works directly with founders to turn go-to-market strategy into pipeline. Rather than delivering a static playbook, they embed with early teams to shape positioning, messaging, and sales motions in real-time.

They’re especially effective for startups building founder-led sales functions. Their frameworks help founders identify target segments, articulate value clearly, and convert early traction into repeatable wins.

Also noteworthy: Blake hosts the The Grove, a high impact channel for early stage teams. Featuring candid interviews with cleantech founders and practical GTM insights, it’s a channel that builds visibility and credibility ahead of fundraising or sales cycles.

Catch it on Spotify or YouTube with cleantech founder lessons and inspiring stories along the way.

Best fit: early-stage teams standing up founder-led sales for the first time.

Skip them if: you already have a repeatable sales motion and need channel execution or attribution at scale.

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3) Earthling Digital

Superpowers: Website Design • Brand Strategy • UX for Climate Solutions

Earthling Digital, founded by Sebastian Ruiz and Christopher McKnight, helps cleantech companies translate complex solutions into clear, action oriented digital experiences.

Their team combines strategy, design, and storytelling to develop websites that support lead generation and investor outreach.

Their work focuses on:

• Mobile-ready, fast-loading websites optimized for conversion
• Brand systems that reflect the scale and nuance of climate solutions
• Messaging that aligns with buyer awareness and investor expectations

They specialize in early- to mid-stage climate companies who need to improve trust signals and narrative clarity across digital touchpoints.

Best fit: teams whose website no longer reflects their value proposition and needs to earn trust fast.

Skip them if: you already convert web traffic well and need demand generation rather than a rebuild.

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4) Dandelion Branding

Superpowers: Brand Voice • Content Strategy • Values‑Led Storytelling

Dandelion Branding, led by Aubrey Wallace and Courtney Hume, helps sustainability brands build clear and consistent voices. Their approach combines foundational brand strategy  including tone, visual identity, and messaging with ongoing content and visibility work.

They prioritize:

• Clear brand guidelines rooted in values and differentiation
• Long-form content strategy informed by SEO and customer data
• Visual and narrative systems that increase brand memorability

Dandelion also hosts The EnvironMental Podcast, where they explore sustainable marketing and brand building with climate entrepreneurs, a resource for teams refining their communications playbook.

Best fit: teams that need a cohesive, mission-aligned brand identity built to last.

Skip them if: you need short-term pipeline performance more than long-term brand equity

5) Orange Bird Agency

Superpowers: PR Strategy • Media Relations • Messaging for Climate Solutions

Orange Bird offers public relations services tailored to cleantech and circular economy companies. Since 2017, they’ve developed strong media relationships across the sustainability ecosystem, helping clients gain visibility with relevant outlets and investors.

Their process includes:

• Strategic narrative development aligned with buyer and investor personas
• Targeted media outreach based on sector relevance and credibility
• Reputation-building through consistent, values-driven messaging

They also provide a structured 9-step PR roadmap, ideal for startups preparing for funding rounds or major product milestones.

Best fit: teams seeking consistent media visibility and industry thought leadership.

Skip them if: you are pre-product or still in market exploration.

Scaling Cleantech with Speed, Strategy, and Certainty

Scale rarely happens in isolation, and the five partners above each accelerate a different part of it: strategy, brand, web, PR, and full-stack revenue. Start from your biggest gap, not from whoever is loudest.

If that gap is a measurable revenue system built for the way cleantech actually buys, that is our work, and we are happy to tell you honestly whether we are the right fit.

Book a call and we will map where you are and point you in the right direction, even if that direction is one of the others on this list.

In a sector where every hour matters, time spent on fixing conversion flows or refining messaging is time lost from advancing the technology itself.

If the next step isn’t clear, please feel free to reach out. Our team is ready to help evaluate where you’re at and recommend a direction.