Tired of Agencies That Promise Results and Deliver Excuses?

Sellonics is different. 150+ brands. $200M+ in revenue generated. 93% client retention. We manage every part of your Amazon account, PPC, SEO, listings, and design, so you scale without the guesswork. CTA Button: See How We Do It

Amazon Agency UK service wheel: product optimisation, brand storytelling, sponsored ads, A+ content, inventory management and global expansion
ROAS4.8×
ACOS↓ 38%
Revenue+ $84,210

Trusted By

Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo
Client brand logo

Why choose us

Their Game

  • Not includedLet’s test and see what happens
  • Not includedYour brand, handed to a junior
  • Not includedReports designed to confuse you
  • Not includedOnboard anyone with a credit card
  • Not includedPay now, results maybe (if you’re lucky)

Our Game

  • IncludedWe run the numbers before we spend money
  • IncludedSenior strategists who’ve actually scaled brands
  • IncludedVisual dashboards that tell you what’s working
  • IncludedWe say no, unless we’re confident we can help
  • IncludedYou only pay when revenue increases

Why Sellonics

Should be your first choice

We don't run experiments on your budget. Senior strategists, proprietary playbooks, and a 93% retention rate that beats the industry by a mile.

Track Record

Proven Amazon success

$1.23M Sales at 25% ACOS. Amazon PPC scaled profitably in 5 months.

$1.23M Sales at 25% ACOS. Amazon PPC scaled profitably in 5 months.

$222K Sales at 29% ACOS. 18,986 orders in 5 months.

$222K Sales at 29% ACOS. 18,986 orders in 5 months.

£37K → £125K Sales. Amazon PPC held at 29% ACOS.

£37K → £125K Sales. Amazon PPC held at 29% ACOS.

$314K Revenue at 3.45 ROAS. High-intent targeting in 30 days.

$314K Revenue at 3.45 ROAS. High-intent targeting in 30 days.

$149K Sales in 30 Days. Smart budget scaling at 3.39 ROAS.

$149K Sales in 30 Days. Smart budget scaling at 3.39 ROAS.

$1.23M Sales at 25% ACOS. Amazon PPC scaled profitably in 5 months.

$1.23M Sales at 25% ACOS. Amazon PPC scaled profitably in 5 months.

$222K Sales at 29% ACOS. 18,986 orders in 5 months.

$222K Sales at 29% ACOS. 18,986 orders in 5 months.

£37K → £125K Sales. Amazon PPC held at 29% ACOS.

£37K → £125K Sales. Amazon PPC held at 29% ACOS.

$314K Revenue at 3.45 ROAS. High-intent targeting in 30 days.

$314K Revenue at 3.45 ROAS. High-intent targeting in 30 days.

$149K Sales in 30 Days. Smart budget scaling at 3.39 ROAS.

$149K Sales in 30 Days. Smart budget scaling at 3.39 ROAS.

Case Studies

Brands we've turned into category leaders

See if you qualify
Case Study
Case study thumbnail: from $86K per month to $235K per month in just 6 months, projecting $4 million in sales for 2026

Can This Amazon FBA Brand Hit $4 Million By 2026? Sales Tripled

Learn More
Case Study
Case study thumbnail: from $22K to $65K per month in 30 days

How We Grew Sales From $22K to $64K Fast For One Of Our Brands

Learn More
Case Study
Case study thumbnail: from 0 to £48K per month in 6 months, Adnan Aslam, sellonics.co.uk

Amazon FBA story from 0 to £48K/month. How We Sold Tons of Inventory Fast.

Learn More
Case Study
Case study thumbnail: home and kitchen brand, from £23K per month to £100K per month in 6 months

How We 4X’d Sales & Cut TACOS to 13% in 6 Months – Amazon PPC Results

Learn More

Verified Client Reviews

Verified client reviews are hosted on Clutch. Read them on Clutch.
Limited spots this quarter

We manage Amazon complexity, so you can focus on scaling

Built for brands that want predictable Amazon performance without micromanaging every detail.

Real growth. Backed by real numbers.

Top Rated Plus
Amazon Ads Verified Partner

Video Testimonials

Some Video Testimonials

60% increase in sales with ACOS FROM 35% to 26%

Growth has been steady but I finally found the team I could rely on.

James, HomeEase

Sales jumped from $50,000 to $150,000 with same ACOS

Sellonics has been incredible, my performance is up, and their team is highly responsible and proactive. I finally feel my ads are in safe hands.

Nathan , USOffice Chairs

From $50K to $500K in 12 Months While Maintaining ACOS at 26%

What I like most is they actually listen. I don't feel like just another account — they actually care about the results.

Danial, Forthtech

60% Increase in sales with ACOS from 35% to 26%

Growth has been steady but i finally found the team I could rely on

James, HomeEase

2X the Sales in Just 3 Months In a Highly Competitive Category

Sellonics made it possible my sales doubled in just 3 months, and their team has been extremely reliable throughout.

Aaron, Founder of PurePeak Supplements

Our Process

Here's how it works

01

Discovery Call

You shouldn't hand your account to someone who doesn't know your brand.

  • We understand your positioning before anything else
  • We map your market, your competitors, your goals
  • You leave the call with clarity, not a sales pitch
02

Audit

Most accounts have more problems than their owners realise.

  • We go deep on PPC, listings, catalogue, and competitors
  • We identify every revenue leak and missed opportunity
  • You get a roadmap, not a generic report
03

Execution

This is where most agencies drop the ball. Not us

  • Wasted spend cut. Profitable campaigns scaled.
  • Daily optimisation, not weekly check-ins
  • Every element of your account working together
04

Growth

Real growth is compounding, not a one-month spike.

  • We expand into what’s working and cut what isn’t
  • Every decision is backed by data
  • Month over month, your account gets stronger

Hear What Clients Have To Say About Us

Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot
Verified client review screenshot

Book A Call

FAQs

Questions, answered

How quickly can I expect results?
75% of clients see improvements within 4 weeks. Week 1-2 we fix bleeding inefficiencies. Week 3-4 optimization kicks in. Month 2+ compound growth across ads, listings, and operations.
I’ve tried other agencies. What makes you different?
We maintain 93% client retention vs industry average of 60%. Our team trains for 8-12 months before managing accounts, not the typical 2-week crash course. We use proprietary bid algorithms and playbooks built from managing 150+ brands. Most importantly, we focus on profitable growth, not just ad spend.
What if I’m already doing well?
Half our clients come to us doing six figures monthly after hitting a growth ceiling. Common scenarios: ACOS creeping up, growth stalling, or margins shrinking despite higher sales. We specialize in breaking these plateaus and scaling to seven or eight figures profitably.
Do you work with new brands?
We work with brands doing at least five figures monthly where there’s enough data to optimize. Below that, we’ll assess your fundamentals and tell you exactly what needs fixing first.
Do I need to commit long-term?
90-day initial period to implement and prove results. After that, month-to-month with 30 days notice to pause or exit. We keep clients through results, not contracts.
Can you handle creative or listing optimization too?
Full service. We optimize PPC, listings, SEO, inventory, pricing, and creative. One team, one strategy, unified execution. No vendor finger-pointing or optimization gaps.
What niches do you specialize in?
We’ve mastered supplements, beauty, home, pet care, consumables, tech accessories, and many more. We adapt proven frameworks to each category. Your competitor’s strategies become your starting point.
Do you help with international expansion to other Amazon marketplaces?
Yes. We’ve expanded brands into UK, EU, Canada, and beyond. We analyze demand and margins first. If expansion makes sense, we handle it. If not, we show you why and save you from costly mistakes.
Do you offer TikTok Shop expansion?
Yes. We’ve scaled brands from zero to six figures monthly on TikTok Shop. We assess product-platform fit first since not all Amazon winners work on TikTok. If aligned, we build and execute.