9 Best Sustainable Marketing Agencies: Digital, Video, Branding & More

Updated: October 2025

Environmental consciousness and social responsibility are at the forefront of consumer values, and businesses are increasingly seeking innovative ways to integrate sustainability into their marketing strategies.

Sustainable marketing agencies have emerged as a result of this, helping brands communicate their commitment to environmental and social causes and align their practices with these values.

Here is our curated list of agencies that excel in delivering eco-conscious and impactful marketing solutions, across a variety of marketing channels from digital to offline.

Best Sustainable Digital Marketing Agency

GrowRoom

GrowRoom are digital marketing specialists with vast experience working with sustainable businesses and non-profits. They increase revenue for sustainable clients by driving more traffic to their websites, via paid media, organic search, and optimising websites to improve user experience, increase conversion rate, and reduce website carbon emissions.

GrowRoom’s values of being sustainable, caring, accountable and passionate mean their team are the perfect fit for sustainable businesses and charities – and they give 3% of all revenue each year to environmental and humanitarian causes.

Case studies include:

• Leveraging paid media to grow revenue 155% for a zero-to-landfill house clearance company
• Delivered 644% ROI for Medik8 by growing non-branded organic traffic
• 67.5% reduction in carbon emissions and 140% increase in conversion rate through website optimisation

Best Sustainable Branding Agency

Enviral

Enviral help organisations convey their social and environmental stories, taking clients from their sustainability strategy to branding and delivery. We really like their three stage strategy to achieve this – evolve, engage, then amplify.

Best Sustainable Video Agency

Two Degrees

Lead by John Guttridge, Two Degrees are a creative studio crafting impactful sustainability stories for purpose-led brands. Our favourite service of theirs is turning sustainability reports into visual stories that move people – it’s a great way to get people to engage in those reports that are often hidden away in a footer link.

Best Sustainable Email Marketing Agency

Claddagh Creative

Claddagh partner with Klaviyo to automate email flows. Their team of experts can help you leverage Klaviyo to maximise your return on investment through email marketing.

Best Sustainable Organic Social Marketing Agency

Growfish

Growfish is a remote agency founded in Barcelona. As well as their name, we like their emphasis on engaging and managing client’s online communities on social media, using your brand’s unique tone of voice.

Best Agency for Sustainability Training

Akepa

Sustainability training is something very few agencies offer for clients – but it makes a lot of sense! Akepa offer their own training program which can be tailored to your needs, to educate your marketing team on topics including greenwashing, greenhushing and more.

Best Sustainable Offline Advertising Agency

PSE

PSE offers three main forms of offline marketing – direct mail, door drops and partnership marketing. We particularly like their approach to partnership marketing, and they’ve worked with some big names including Hello Fresh.

Best Influencer Marketing Agency for Sustainability

The Influence Agency

As their name suggests, The Influence Agency are experts in influencer marketing and they have a dedicated landing page for sustainable influencers. TIA are not a sustainable agency themselves, though, hence the lack of a sustainability policy.

Best Agency for Sustainability Communications

Greenhouse Communications

Greenhouse Communications are a well-established environmental communications agency. They partner with some of the best-known sustainable brands and NGOs, including the WWF, to create campaigns that make a lasting impact and deliver real-world outcomes.

How to choose the right sustainable agency for you

1. Ensure they align with your beliefs:
As well as reading their ‘about us’ page and sustainability policy, check out their socials to ensure their communication style aligns with your brands’.

2. Check their case studies:
If they’re not shouting about their results, then perhaps they don’t have any results to shout about?

3. Find a specialist for exactly what you need:
Especially true of small agencies – you can’t expect a small team to be masters of all areas of sustainable marketing. Understand the areas of support you need first, and then choose an agency that specialises in that area of marketing. Be wary of full-service agencies.

4. Read their reviews:

Look beyond the reviews the agency has chosen to showcase. Check their Google reviews as well as reviews on agency directories such as Sortlist and Clutch.