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Semlis was built from our own challenges running multi-channel businesses, endless reconciliations, hidden costs and lost profits. It's enterprise-grade intelligence made simple, giving online sellers accurate numbers, instant profit tracking and smart automation without the complexity. We understand VAT and cross-border fees properly. Whether you manage a few products or thousands across multiple channels, Semlis scales with you. Our mission is simple: clarity, control and sustainable profitability.

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Semlis is the advanced profit calculation and repricing engine built for professional eCommerce sellers. Trusted by online sellers across the UK, Semlis connects all your sales channels into one clear dashboard, showing real numbers in real time. Stop guessing, start scaling. Discover what your business is truly earning with complete business clarity.

Book Your FREE Trial Now

Know Your True Profit
On Every Sale

No more Excel sheets. Semlis automates repricing, calculates real-time profit margins, and syncs data across Amazon, eBay, and Linnworks instantly.

No more Excel sheets. Semlis automates repricing, calculates real-time profit margins, and syncs data across Amazon, eBay, and Linnworks instantly.

Multi-Channel Integrations 

Advanced Repricing

Omni-Channel Sync

Smart Reporting

Know Your 
True Profit
On Every Sale

One Source of Truth for Online Sales

WHY CHOOSE US?

OUR SERVICE

Everything You Need To Scale

Built by IT professionals who sell online

ABOUT US

We Build Tools That Solve Real Seller Problems 

HOW IT WORKS

Set Up In Minutes, Save Hours Daily

Book a Demo and Start Your 2 week FREE Trial

100% Privacy Guaranteed

Semlis is your all‑in‑one profit and pricing engine. Sync instantly across Amazon, eBay, Shopify, Magento and Linnworks. Track margins, fees and top items in one view. Automate competitor monitoring and price adjustments 24/7. 

Book Your Demo Today

Fill out the form and see how Semlis can transform your pricing strategy. Our team will show you a personalised walkthrough.

Book Your FREE Demo

Semlis is your all‑in‑one profit and pricing engine. Sync instantly across Amazon, eBay, Shopify, Magento and Linnworks. Track margins, fees and top items in one view. Automate competitor monitoring and price adjustments 24/7. 

Semlis was built from our own challenges running multi-channel businesses, endless reconciliations, hidden costs and lost profits. It's enterprise-grade intelligence made simple, giving online sellers accurate numbers, instant profit tracking and smart automation without the complexity. We understand VAT and cross-border fees properly. Whether you manage a few products or thousands across multiple channels, Semlis scales with you. Our mission is simple: clarity, control and sustainable profitability.

Semlis is the advanced profit calculation and repricing engine built for professional eCommerce sellers. Trusted by online sellers across the UK, Semlis connects all your sales channels into one clear dashboard, showing real numbers in real time. Stop guessing, start scaling. Discover what your business is truly earning with complete business clarity.

Book a Demo and Sign Up for a Free Trial 

Experience the full power of Semlis risk-free. See how Semlis can transform your pricing strategy with a personalized demo. Our team will show you how to track profits, manage prices, and prevent losses with zero commitment.

Book a FREE Demo

Multi-Channel Integrations 

Advanced Repricing

Omni-Channel Sync

Smart Reporting

True Profit & Loss

Instantly see profit or loss per SKU, including fees, VAT, promotions, and daily costs.

Synchronise pricing and product data across Amazon, eBay, Shopify, and Linnworks instantly.

Omni-Channel Sync

Automatic exchange rate adjustment for international marketplaces to protect your margins.

Currency Auto-Pilot

Rule-based repricing using stock level, competitor data, and margins. "If stock < 10, raise price."

Advanced Repricing

Fill Out the Form

Begin by providing us with some basic information through our user-friendly form.

Connect Your Channels

One-click integration with Linnworks, Amazon, eBay, and Shopify. No coding required.

Let Semlis Take Over

We monitor competitors and costs 24/7, adjusting your prices to maximise profit automatically.

Accurately calculates VAT, Amazon fees and cross‑border taxes, handled with ease.

VAT Liability & Fees

Identify your top 50 items, low sales, outgoing costs, and marketing fees in one view.

Smart Reporting

Does it integrate with Linnworks?
Yes! Semlis has a deep integration with Linnworks to look up and update product details in your inventory automatically.
Can I handle VAT and International fees?
Absolutely. Semlis works out exactly how much VAT needs to be paid on each sale, automatically applying currency exchange rates and handling cross-border obligations.
How fast does repricing happen?
Repricing occurs in real-time or at scheduled intervals depending on the channel API limits. For most channels, we react instantly to competitor changes.
Is my sales data secure?
Yes. We use industry-standard encryption and strict data policies. Your data is never shared and is only used to optimise your own account.
Can I create custom rules?
Yes. Our Rule Engine allows you to build complex logic based on stock levels, weight, competitor price, and profit margins.

FAQS

Everything You Need to Know 

TESTIMONIALS

What Our Clients Say  

"Semlis completely changed how we price. No more manual Excel work. The profit calculation is spot on."

JOHN DOE
★ ★ ★ ★ ★

"The Linnworks integration is seamless. It acts as the brain of our operation now."

SARAH MILLER
★ ★ ★ ★ ★

"Finally, a tool that understands VAT and cross-border fees properly. Highly recommended."

MIKE ROSS
★ ★ ★ ★ ★

Total Profit

£4,240.50

 +12% this week 

IF Stock Level < 10 

THEN Increase Price by 15%

THEN Match Price + £0.01 

IF Competitor Price > My Price 

Book Your Demo Today

Fill out the form and see how Semlis can transform your pricing strategy. Our team will show you a personalised walkthrough.

TRUSTED INTEGRATIONS

Get a FREE Demo Today

HOW IT WORKS

Set Up In Minutes, Save Hours Daily

Fill Out The Form

Provide a few basic details via our quick, user‑friendly form to get started. 

Book a Demo 

Speak with our team to discuss your needs and arrange a tailored demo. 

Connect Channels  

Integrate with Linnworks, Amazon, eBay and Shopify, then set pricing rules. 

Let Semlis Take Over

We monitor competitors and costs 24/7 and automatically adjust prices to maximise profit.