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Best Ecommerce Agency For Profitable Growth Across Channels

We scale ecommerce with full funnel acquisition, CRO, and retention, measured against CAC, LTV, and payback not vanity metrics.

Unlimited creative production included
No commission on spend
Evidence-led growth sprints
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Reviewed on
4.9
4.900000
5 Star Agency

Full funnel acquisition plan

The best ecommerce agency does not rely on one channel. It builds a balanced acquisition engine across demand creation and demand capture, then connects it to conversion and retention. We map your funnel, define your ideal customer and margins, and allocate budget across top, mid, and bottom funnel work with clear hypotheses. That can include paid social and creators, search and Performance Max, affiliates, and upper funnel video or CTV where it makes sense. Success is measured on blended efficiency and payback, not isolated platform metrics.

TOFU demand creation channels

Use video, creators, and broad targeting to create new demand, then measure lift through blended results and controlled tests rather than last-click attribution.

MOFU retargeting and nurture

Run dynamic product ads, email flows, and social proof sequences to move visitors back to product pages, reducing leakage between browse and purchase intent.

BOFU conversion and offers

Tighten landing pages and offers for high intent traffic, improving conversion rate and average order value so acquisition can scale without rising CAC.

Build the plan

What best looks like

The best ecommerce agency is measured by how well it builds a repeatable growth system. That system should create demand, capture intent, convert efficiently, and retain customers so unit economics improve over time. We focus on the compounding levers: creative testing, conversion optimisation, lifecycle retention, and measurement that avoids last-click traps. This creates stability as platforms change and prevents growth ceilings that come from relying on one channel or one offer.
  • Full funnel, not single channel
  • Compounding creative and CRO
  • Retention improves unit economics

Creative and paid performance

Ecommerce performance is constrained by creative volume and testing discipline. We build a creative system that produces enough ad variants to find winners, manage fatigue, and scale spend without performance collapses. You get unlimited ad creative production included, plus structured hook and offer testing across Meta, TikTok, and Google where appropriate. Because we charge no commission fees on ad spend, the focus stays on efficient growth, not budget size. Every sprint is evidence-led, backed by reporting that ties creative decisions to revenue outcomes.

UGC and creator style ads

Produce native-feeling assets that demonstrate use, proof, and objections, then cut multiple variants per concept to scale what works quickly.

Platform specific testing cadence

Run weekly tests across Meta and TikTok, then translate learnings into search and Performance Max inputs, keeping messaging consistent across the journey.

Spend scaling without waste

Scale budgets with clear guardrails and audience strategy, using exclusions and segmentation to reduce wasted impressions and protect CPA targets.

Increase ROAS

CRO and retention engine

Paid growth alone is fragile if your site and retention do not keep up. We improve onsite conversion and customer value with CRO and retention programmes that reduce funnel leakage and increase LTV. That includes landing page and PDP testing, site speed and Core Web Vitals hygiene, and lifecycle flows like abandoned cart, post-purchase upsells, win-back, and VIP segmentation. Tracking is tightened with clean events and dashboards so you can see the full funnel impact. The goal is sustainable unit economics, not temporary spikes.

CRO on PDP and checkout

Improve message clarity, proof, and friction points using structured tests, so more sessions turn into purchases without increasing traffic costs.

Email and SMS lifecycle flows

Build segmentation and automations that recover revenue and increase repeat purchase, including browse and cart recovery, post-purchase, and win-back.

Attribution and incrementality checks

Move beyond last-click with practical measurement and lift checks, so you understand which upper funnel investments actually drive incremental revenue.

Lift conversion

Faster than hiring

To build an ecommerce growth function in-house you need performance marketing, creative, CRO, and lifecycle retention expertise. Hiring that team takes time and usually leads to gaps or bottlenecks. Growthcurve gives you a complete marketing department in one package, integrating as your internal staff so execution stays fast. You can scale specialist resources up or down as needed, and the engagement is monthly rolling, so you keep flexibility while maintaining momentum.
  • Complete ecommerce team included
  • Integrates like internal staff
  • Scale up or down

SEO that compounds, not a checklist

Organic growth is a mix of technical hygiene, content that earns clicks, and authority building that is genuinely deserved. We treat SEO as a product, with a backlog and a cadence, rather than a one-off project. Technical work covers crawlability, site architecture, Core Web Vitals, schema markup and index management. On-page work is driven by search intent and the real questions buyers ask at each stage. Off-page focuses on link earning through useful assets, partnerships and digital PR rather than spam. For example, for a B2B brand we might build a set of comparison pages for demand capture, a small research piece to earn links, and a library of problem-led articles that support sales calls. The outcome is more qualified traffic, better brand credibility, and lower dependency on paid media over time.

Aligned incentives

Many ecommerce agencies charge a percentage of ad spend, which can reward higher budgets even when efficiency declines. Growthcurve charges no commission on your ad spend, keeping incentives aligned to profitable growth. You also get proprietary AI marketing tools and a real time performance dashboard to speed up testing and decision making. Supported by official platform partnerships, we keep execution current and focused on measurable outcomes like ROAS, payback, and LTV.
  • No commission on ad spend
  • AI tools speed iteration
  • Real time performance dashboard
What does the best ecommerce agency do differently?
The best ecommerce agency builds a full funnel system, not a single channel play. That means creating demand at the top, capturing intent through search and retargeting, improving onsite conversion, and increasing LTV through retention. It also means better measurement. Strong teams avoid last-click bias and make budget decisions on blended performance, payback, and cohort quality. If the agency only reports platform ROAS, you will miss what is really driving growth.
Which channels should an ecommerce agency prioritise first?
Start with the channels that match your current demand and margins. Many brands begin with Meta and Google because they provide fast feedback, then expand into TikTok, influencers, affiliates, and upper funnel video once the core loop is stable. We prioritise based on constraints: if demand is weak, we invest more in top funnel creative and video; if conversion is weak, we fix the site first; if retention is weak, we build lifecycle flows to improve LTV before scaling spend.
How do you approach creative testing for ecommerce ads?
We treat creative like a testing system. Each week we ship batches that isolate variables such as hook, proof, offer, and format, so we learn what drives CTR and conversion rather than guessing. Winning concepts get scaled into more variants, while fatigue is managed through rotation and new angles. Because creative is often the main constraint, we include unlimited ad creative production to keep velocity high and reduce the performance plateaus that slow scaling.
What CRO work has the biggest impact on ecommerce conversion?
The biggest gains usually come from product pages, landing pages, and checkout. We improve message match, proof, and friction, focusing on the sections that influence add-to-cart and purchase decisions. We use structured tests and behavioural data to prioritise changes, then measure lift against conversion rate and revenue per session. CRO is most powerful when it is tied directly to paid media learnings, so the offer and messaging stay consistent from ad through to checkout.
How do you improve retention and customer lifetime value?
We increase LTV by building retention programmes that turn first buyers into repeat buyers. That includes segmented email and SMS flows, post-purchase education, cross-sell and upsell sequences, win-back campaigns, and VIP tiers where appropriate. We also use customer data to personalise recommendations and reduce churn. Retention is measured through cohort repeat purchase rates and revenue retention, not just open rates. Improving LTV gives you more headroom to scale acquisition profitably.
How do you measure incrementality beyond platform attribution?
Platform attribution is useful for optimisation, but it can over-credit retargeting and under-credit upper funnel investment. We compare platform metrics to blended outcomes like total revenue, new customer volume, and payback. When needed, we use practical lift checks such as holdouts or geo tests to validate whether a channel is incremental. The goal is to allocate budgets to what truly drives growth, especially when you are scaling into higher spend levels and auctions become more competitive.
Do you support Shopify and ecommerce martech integrations?
Yes. We regularly work with Shopify stores and ecommerce stacks, aligning tracking, product feeds, and lifecycle tools so channels do not operate in silos. That includes clean event tracking, catalogue sync, and integration with email and SMS platforms. We focus on practical outcomes: faster page performance, better data quality, and more consistent messaging from ads to PDP to post-purchase flows. If you already have tools in place, we fit into your stack rather than forcing unnecessary change.
What pricing model is best for an ecommerce agency?
Common models include retainers, percentage of ad spend, and hybrids. We recommend being cautious with spend commissions because they can misalign incentives and encourage higher budgets even when performance declines. Look for clarity on what is included: creative production, CRO support, retention work, and reporting. A good agreement defines success metrics and a clear operating cadence. Growthcurve charges no commission on ad spend, keeping incentives aligned to profitable growth.
What happens in the first month with Growthcurve?
We begin with a rapid audit of your paid accounts, creative, tracking, and onsite funnel. Then we define success metrics, prioritise the biggest constraint, and start shipping weekly across creative, campaigns, and conversion improvements. You get access to a real time performance dashboard so you can see what changed and what we learned. If you want to evaluate whether we are the best ecommerce agency fit for your stage, book a call and we will map next steps. Book a call

Lifecycle marketing that increases LTV

If you only optimise acquisition, you end up paying more for the same customers. We build lifecycle systems that raise retention and expansion, using email, SMS where relevant, and CRM workflows that feel personal without being creepy. We set up segmentation based on behaviour and value, then design flows for onboarding, activation, replenishment, win-back and referral. In practice that can include RFM modelling for ecommerce, lead scoring for B2B, or product usage triggers for SaaS. We also help you capture first-party and zero-party data with preference centres and progressive profiling, so targeting stays resilient as privacy changes. When we ran a lifecycle audit for one team, we found revenue sitting in overlooked moments, like post-purchase education and renewal risk signals. The outcome is a healthier blended CAC and a marketing engine that keeps paying you back.

Measurement you can trust and use

Attribution arguments waste time and block good decisions. We set measurement up so it is good enough to guide spend, creative and roadmap choices, and we are honest about what is knowable. Tracking work can include GA4 hygiene, conversion event design, server-side tracking where appropriate, and consistent UTMs. Reporting lives in a real-time dashboard, with views that match how you run the business, such as channel performance, funnel conversion, cohort retention and creative learnings. We also use incrementality thinking where it matters, like geo holdouts or controlled tests for bigger budget shifts. For example, if brand search rises after a video push, we look at the whole picture rather than declaring victory based on last click. The outcome is faster iteration and fewer surprises in board meetings.

Operating rhythm, SLAs and ways of working

Good marketing is mostly good operations. We set a working rhythm that keeps delivery moving and prevents strategy decks from becoming a comfort blanket. You get a named lead, specialist channel owners, and access to top-tier US and UK talent, scaled up or down based on your needs. We agree response times, approval flows and who owns what across creative, landing pages, tracking and budget changes. Campaign planning happens in short cycles, with clear priorities and a shared backlog, so work does not disappear into a black box. We also help your internal stakeholders, like product, sales and finance, stay aligned with what marketing is doing and why. The outcome is a calm, consistent cadence, less context switching, and a team that behaves like your internal staff while staying on a monthly rolling basis.

Why Growthcurve

Growthcurve is built for teams who want senior thinking and fast delivery without the overhead of building it all in-house. Our marketers have scaled startups to nine-figure valuations, and our clients have raised over $700M in funding, so we understand what investors and boards look for. You get a complete marketing department in one package, with specialists who integrate as your internal staff and can scale up or down as priorities change. We are an official Meta, Google, TikTok and Snap agency partner, and we have a deep creative engine, including unlimited ad creative production, because most growth ceilings are creative ceilings. You also get a proprietary suite of AI marketing tools and a real-time performance dashboard to keep decisions grounded. No long-term contracts, no commission fees on ad spend, just accountable work on a monthly rolling basis.

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