Sustain

What Sustain does

Sustain is a London-based digital marketing and advertising agency founded in 2015 by Ant Donbavand, focused exclusively on premium and sustainable independent fashion brands. The firm delivers results-driven multi-channel digital marketing services spanning Facebook and Instagram advertising, Google PPC, conversion rate optimization, email marketing strategy and automation, and end-to-end Shopify store setup including theme customization, analytics and advertising account integration, app installation, and basic SEO.

The agency's core technology is a Shopify-centric digital marketing stack rather than a proprietary platform; service delivery relies on operator-led configuration of third-party tools (Shopify, Google Analytics, Meta Ads, Google Ads, email automation platforms) tailored to each fashion brand client's positioning and aesthetics. Sustain differentiates through vertical specialization, refusing to work with brands whose environmental practices conflict with the agency's stated values, and through an embedded environmental partnership with Ecologi for tree planting and carbon offsetting.

Commercially, Sustain operates as a professional services agency on retainer or project-based engagements with custom-quoted fees; no public pricing tiers are disclosed. The go-to-market is direct sales via outreach, brand partnerships, and referrals within the sustainable fashion ecosystem, with organic presence on Instagram and the sustainagency.com website as demand-generation channels. Sustain is founder-owned and bootstrapped, with no disclosed external investment, and operates from a London headquarters and a secondary office in St Ives, Cornwall.

Name

Sustain

Legal name

Sustain

Website

https://sustainagency.com

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

1–10 employees

Short description

Sustain is a London-based digital marketing and advertising agency that provides multi-channel e-commerce growth services — including paid social, Google PPC, email automation, and Shopify store setup — exclusively to premium and sustainable independent fashion brands.

Ownership category

akta.pro rank

Product category

Digital Marketing Services

SIC

Services-Advertising Agencies (7311)

akta.pro primary industry

Live Commerce & Shoppable Creator Campaigns (BPAFAHAL)

Keywords

• Digital marketing agency
• Fashion brand advertising
• Ecommerce growth strategy
• Shopify store development
• Social media advertising services

Headquarters

HQ city

London

HQ country

United Kingdom

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales

Revenue model

1. Digital Marketing Agency Services: Sustain generates revenue through agency service fees, providing advertising and marketing services to fashion brands. Services include social media advertising, Google PPC, email marketing strategy, Shopify store setup, and e-commerce brand growth consulting. The agency works on retainer or project-based engagements, delivering multi-channel digital marketing strategies focused on growing traffic, email subscribers, customer retention, and revenue for clients.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

Sustain is a London-based digital marketing and advertising agency that helps premium and sustainable fashion brands achieve profitable growth. The agency delivers results-driven multi-channel campaigns including Facebook and Instagram advertising, Google PPC, conversion optimization, email marketing strategy and automation, Shopify store setup with brand-matched themes, and broader e-commerce brand growth consulting.

Product overview

Sustain is an e-commerce advertising and marketing agency offering three integrated service modules: Advertising and Marketing Services (Facebook, Instagram, and Google PPC campaigns), Shopify Store Setup (custom store development with integrations), and E-Commerce Brand Growth (multi-channel strategy for traffic, retention, and revenue). The agency specializes in helping premium and sustainable fashion brands achieve profitable growth through honest and sustainable marketing practices.

Differentiator

Problem solved

Functional benefit

Products and services

• Advertising and Marketing Services
• Shopify Store Setup
• E-Commerce Brand Growth

Quantifiable outcome

• Strong return on ad spend (ROAS) delivered to clients

Named customers27 records

Segments2 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration4 records

Feature5 records

Partnerships

One partnership is on record.

• EcologicoreStrategic or Co-development PartnerSustain has partnered with Ecologi, a sustainability platform, to support environmental initiatives. Through this partnership, Sustain contributes to tree planting, climate project funding, and carbon emission offsetting. The partnership aligns with Sustain's core value of working only with brands that include the environment in every decision, and reflects the agency's commitment to minimizing its own environmental impact in the fashion marketing industry.

Scale indicators2 records

Recent moves4 records

Expansion highlights4 records

Direct peers

• Pattern: Pattern is an e-commerce accelerator that helps brands grow on marketplaces and direct-to-consumer channels using paid media, SEO, and marketplace optimization. It is comparable to Sustain because both serve e-commerce brands with paid digital advertising and growth services, though Pattern's marketplace focus is a meaningful differentiation.
• Yardstick: Yardstick is a fashion-focused digital marketing agency offering paid media, SEO, and analytics for apparel and lifestyle brands. It is highly comparable to Sustain due to overlapping fashion vertical focus and similar paid social/SEM service offerings.
• Avenue Z: Avenue Z is a digital marketing and PR agency with paid media, influencer, and content capabilities for consumer and lifestyle brands. Comparable to Sustain in service mix (paid social, content, growth strategy), though with a broader vertical and a stronger PR/earned media offering.
• House of Greenland: House of Greenland is a creative and digital agency serving fashion, beauty, and lifestyle brands with brand strategy, content, and performance marketing. Comparable to Sustain for its premium fashion and lifestyle client base and integrated digital service stack.
• Backbone: Backbone is a digital creative agency focused on fashion, lifestyle, and consumer brands, offering branding, content production, and digital marketing. It is comparable to Sustain because both serve premium consumer brands with multi-channel digital growth services, though Backbone skews more creative/branding-led.

Broad incumbents

• BPCM: BPCM is a global communications agency for fashion, beauty, and lifestyle brands, offering PR, digital, and creative services. Comparable to Sustain for its fashion/lifestyle client base and integrated digital capabilities, but operates at significantly larger scale with a public relations emphasis.
• Karla Otto Group: Karla Otto is a global luxury fashion, beauty, and lifestyle PR and communications agency with offices worldwide. Comparable to Sustain for its premium fashion client roster, though Karla Otto's core offering is PR and events rather than paid performance marketing.
• The Independents: The Independents is a global group of agencies serving fashion, luxury, beauty, and lifestyle clients with communications, digital, and creative services. Comparable to Sustain for shared fashion/luxury client base, though it is a much broader portfolio play spanning PR, events, and digital at global scale.

Regional players

• Starworks Group: Starworks Group is a UK-based creative communications agency serving premium fashion, lifestyle, and hospitality brands with PR, events, and digital services. Comparable to Sustain for shared UK fashion client base, though Starworks skews toward PR and experiential over performance marketing.

Emerging players

• LaForce: LaForce is a digital marketing and e-commerce agency serving fashion, lifestyle, and consumer brands with paid media and Shopify services. Comparable to Sustain for similar vertical and platform (Shopify) focus, though at earlier scale and broader vertical exposure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights5 records

Customer concentration

• Xx.com/sustainagency
• Instagraminstagram.com/sustainagency
• Facebookfacebook.com/sustainagency
• LinkedInlinkedin.com/company/sustain-agency

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Sustain