Best Magento Performance Optimisation Agencies

A slow Magento store costs you money every single day. Google penalises slow pages in search rankings. Shoppers leave before they buy. Conversion rates drop on mobile. None of this is a mystery; it is all measurable, and it is all fixable with the right team.

Magento performance work is not the same as general web development. It requires a working knowledge of how Magento caches pages, how it runs database queries, how it handles indexing, and where performance breaks under traffic load. Most agencies can install a caching extension. Far fewer can trace a bottleneck to a slow database query, a poorly configured cron job, or a third-party extension that fires 40 API calls on a product page load.

This guide was put together by the KiwiCommerce team, Adobe Commerce Certified and Hyvä Bronze Partner developers based in Cheshire, UK, with 250+ eCommerce projects delivered since 2016. We have included the agencies we consider genuinely capable of this work, and what makes each one worth considering.

Most store owners talk about Magento performance as one thing. In practice it splits into two separate problems that require different skills to fix. Hiring the wrong type of agency for your specific problem wastes time and money.

Frontend Performance:
Frontend is everything the browser deals with: page weight, image sizes, JavaScript loading, CSS delivery, and Core Web Vitals scores. A Lighthouse score below 50 on mobile is usually a frontend problem. The fix typically involves switching to a lighter frontend framework, optimising images, reducing JavaScript, and improving how the page loads in the browser. For Magento stores, replacing the Luma theme with Hyvä is the most effective frontend performance improvement available in 2026 regularly pushing Lighthouse scores above 90 and cutting page weight by more than half.

Backend Performance:
Backend is everything the server deals with: how quickly Magento generates a page before it reaches the browser, how efficiently the database handles queries, how caching is configured, and how Magento’s indexers and cron jobs run. A store with a Lighthouse score of 85 but a server response time of four seconds has a backend problem, not a frontend one.

The best agencies diagnose which problem you actually have before prescribing a fix. If someone suggests Hyvä as the solution to a slow Time to First Byte, they have not understood your issue. If someone suggests Redis configuration changes to fix your Core Web Vitals score, same problem. Our Magento Performance Optimisation service starts with an audit that separates these two layers before any work begins.

Not all Magento agencies offer genuine performance work. Some offer it as a line item in a broader retainer without specific depth. A few questions cut through the pitch quickly.

Ask whether they audit before they work. A credible performance agency will not start changing configuration files on your live store without understanding where the problem actually is. A proper Magento performance audit looks at server response times, full page cache hit rates, slow query logs from the database, indexer configuration, third-party extension overhead, and JavaScript payload size. If an agency offers to “optimise Magento performance” without mentioning an audit, be cautious.

Ask about certification. Adobe Commerce Certified status means the agency’s developers have been assessed on the platform specifically including its caching architecture, indexing system, and deployment process. Generic web developers who have worked on Magento projects are not the same as certified Magento specialists.

Ask whether they have experience with both frontend and backend performance. A frontend-only team may improve your Lighthouse score without touching your server response time, leaving half the problem unsolved. A backend-focused team may tune your database without addressing the 800 KB JavaScript payload your theme is shipping.

Ask about post-optimisation monitoring. Performance degrades over time as extensions are added, catalogue grows, and traffic patterns change. A one-time fix that is not followed by regular review will decay. Structured Magento support and maintenance that includes performance monitoring is worth more long-term than a single engagement.

1. KiwiCommerce

• Location: Handforth, Cheshire, UK
• Founded: 2016
• Certifications: Adobe Commerce Certified, Hyvä Bronze Partner
• Services: Magento performance audit, Core Web Vitals, database optimisation, Hyvä migration, code audit, post-optimisation support

KiwiCommerce is the only UK-based, Adobe Commerce Certified, Hyvä Bronze Partner agency on this list covering both the backend and frontend sides of Magento performance from a single certified team.

On the frontend, the team’s Hyvä Bronze Partnership means performance work extends to full Luma-to-Hyvä migrations for stores where the frontend architecture is the primary bottleneck. Hyvä replaces Magento’s heavy Luma stack with Tailwind CSS and Alpine.js, cutting page weight substantially and consistently achieving Core Web Vitals scores in the green for stores that were previously failing on mobile. For stores not ready for a full Hyvä migration, frontend optimisation work covers image compression, JavaScript deferral, CSS delivery, and CDN configuration.

On the backend, the approach starts with a Magento Code Audit before any changes are made. The audit identifies slow database queries, misconfigured indexers, caching gaps, and third-party extensions creating unnecessary overhead. From there, fixes are applied systematically full-page cache configuration, Varnish setup where applicable, Redis for session and cache storage, database query optimisation, and cron job scheduling review.

After optimisation, 100+ stores are kept on active Magento support and maintenance retainers, which means performance is monitored as the store grows, not left to degrade until the next complaint arrives.

For stores in the research phase, our Magento 2 Performance Optimisation Guide covers the full technical picture of what good Magento performance work involves. Speak to the KiwiCommerce team about your Magento performance.

2. MageCloud

• Location: UK-registered
• Founded: 2014
• Certifications: Amazon AWS Partner, Google Cloud Partner, Magento certified
• Specialisation: Magento and Shopify development, performance optimisation, migration

MageCloud is a UK-registered eCommerce agency with certified cloud partnerships across AWS and Google Cloud infrastructure credentials that are directly relevant to performance work, since the hosting environment is one of the most common sources of poor Magento response times. Their performance work covers both the Magento application layer and the server infrastructure underneath it. Published case studies reference measurable commercial results, including revenue improvements following store optimisation engagements.

Worth considering if: Your Magento performance issues are partly infrastructure-related hosting configuration, cloud setup, or server resource allocation and you want an agency with cloud certifications alongside Magento expertise.

3. Onilab

• Location: Eastern Europe (serving EU and UK clients)
• Founded: Not publicly stated
• Certifications: Magento specialist
• Specialisation: Magento speed optimisation, UX, PWA, large-scale refactoring

Onilab focuses on Magento development with a specific track record in performance-led refactoring for larger stores. Their speed optimisation service covers both frontend delivery and backend code quality, and they have documented experience with stores where performance issues stem from accumulated technical debt rather than a single misconfiguration. Their UK and EU client work is handled remotely. Note: they are not UK-based, which is relevant for timezone-dependent projects.

Worth considering if: Your Magento store has accumulated years of technical debt and needs a deep performance refactoring engagement rather than configuration tuning alone.

4. Takeoff Digital

• Location: UK-based
• Founded: Not publicly stated
• Certifications: Adobe Marketplace Extension Builders
• Specialisation: Magento 2 development, custom extensions, performance, CI/CD pipelines

Takeoff Digital is a UK-based Magento agency with the specific distinction of having extensions published on the official Adobe Marketplace, a meaningful credential because it requires Adobe’s review and technical approval process. Their performance work sits within a broader Magento development offer that includes CI/CD pipeline implementation for automated deployments, which reduces downtime during updates. Their extension-building experience is directly relevant to performance work, as third-party extension overhead is one of the most common causes of Magento slowdowns.

Worth considering if: Your Magento performance issues include custom extension overhead or you need an agency that can audit and optimise bespoke code alongside standard configuration work.

5. Magefan

• Location: Ukraine-based (serving global clients)
• Founded: 2015
• Certifications: Magento specialist
• Specialisation: Magento extensions, speed optimisation, database optimisation, cron configuration

Magefan operates as both a Magento extension publisher and a development agency. Their free and paid extension catalogue includes tools directly relevant to performance: Google Page Speed Optimiser, Image Lazy Load, and Full Page Cache Warmer, which means their performance advisory work comes from firsthand knowledge of how these tools behave on Magento stores at scale. Their optimisation service covers database cleaning, cache configuration, cron job setup, and code optimisation. Note: they are not UK-based.

Worth considering if: Your performance work involves Magento extension configuration or you want an agency whose developers have built performance-specific Magento extensions and understand them from the inside.

6. Dinarys

• Location: Eastern Europe (serving EU and US clients)
• Founded: Not publicly stated
• Certifications: Magento and Adobe Commerce partner
• Specialisation: Magento architecture, Core Web Vitals, frontend performance, PWA

Dinarys focuses on Magento architecture and frontend performance optimisation, with documented experience on Core Web Vitals improvements and page speed work for mid-market Magento stores. Their approach to performance is frontend-first, improving how pages are delivered to browsers rather than deep backend tuning, which suits stores whose primary performance gap is Lighthouse score and Core Web Vitals rather than server response time.

Worth considering if: Your main performance priority is Core Web Vitals scores and frontend delivery optimisation, rather than backend database or caching issues.

7. BSS Commerce

• Location: Vietnam (serving global clients)
• Founded: 2012
• Certifications: Adobe Bronze Solution Partner
• Specialisation: Magento extensions, performance services, full-service eCommerce

BSS Commerce is an Adobe Bronze Solution Partner with a long history in the Magento extension ecosystem. Their performance services cover standard speed optimisation, caching configuration, image optimisation, and database cleaning alongside their broader development and support offer. Bronze Solution Partner status is the entry-level Adobe certification tier, which reflects a smaller operation than Silver or Gold Partners.

Worth considering if: You need a cost-effective performance optimisation engagement on a straightforward Magento store and are comfortable working with a team based in Vietnam.

8. Whidegroup

• Location: Ukraine-based
• Founded: Not publicly stated
• Certifications: Magento specialist
• Specialisation: Magento performance, speed, B2B, eCommerce development

Whidegroup offers Magento performance work as a standalone service as well as within broader development engagements. Their performance scope covers server-level configuration, full page cache setup, CDN integration, and frontend delivery improvements. For stores with a defined and relatively straightforward performance problem poor cache hit rate, unoptimised images, missing CDN their offer is practical and cost-efficient.

Worth considering if: You have a clearly defined Magento performance problem and need a cost-effective team to resolve it without the overhead of a larger agency engagement.

9. Tigren

• Location: Vietnam
• Founded: Approx. 2012
• Certifications: Shopify Partner, Magento specialist
• Specialisation: Magento theme development, speed optimisation, PWA

Tigren covers Magento performance work as part of a wider theme development and migration offering. Their speed optimisation service focuses on frontend delivery image optimisation, JavaScript loading, CSS improvements alongside standard Magento configuration work. Their pricing is at the accessible end of the market. Note: not UK-based.

Worth considering if: Your Magento performance issues are primarily frontend and theme-related, and budget is a key constraint.

Stores that have tried and failed to fix their Magento performance usually have one thing in common: they skipped the audit and went straight to fixes.

A proper performance audit gives you a ranked list of what is actually slowing your store down, in order of impact. The areas it covers:

Server Response Time (TTFB):
Time to First Byte is how long it takes the server to start sending data to the browser. Anything above 800ms on a cached page suggests a problem with full page cache configuration, server resources, or PHP-FPM setup. Our Magento Code Audit includes server response analysis as part of the standard scope.

Full Page Cache Hit Rate:
Magento’s full page cache should be serving the majority of pages from cache, not regenerating them on each request. A low hit rate below 80% is one of the most common causes of poor TTFB on Magento stores. This is often caused by misconfigured cache invalidation rules or extensions that bypass the cache unnecessarily.

Database Query Performance:
Magento stores slow query logs when enabled. A performance audit reads these logs and identifies the queries that are taking longest to execute, usually missing database indexes, unoptimised EAV queries on large catalogues, or poorly written custom module queries.

Indexer and Cron Configuration:
Magento uses indexers to pre-compute product, category, and price data. If indexers are set to “Update on Save” on large catalogues, every product save triggers a full reindex freezing the store for other operations. A well-configured indexer schedule, combined with properly timed cron jobs, removes this bottleneck.

Third-Party Extension Overhead:
Every extension adds code to the Magento page generation cycle. Some extensions are written efficiently; others fire database queries on every page load, load unnecessary JavaScript, or make external API calls during checkout. An extension audit identifies the specific modules adding the most overhead. Our Magento database optimisation guide covers what this analysis involves at the database level.

Frontend Payload:
Even with a fast backend, a page that ships 1.2MB of JavaScript to the browser will score poorly on Core Web Vitals. Frontend audit covers JavaScript and CSS delivery, image formats and compression, third-party script loading, and font loading strategy.

For stores where the frontend is the primary performance bottleneck particularly those stuck on Luma with Core Web Vitals consistently in the red, a Hyvä theme migration is often the most effective single intervention available.

Hyvä replaces Magento’s heavy Luma frontend with Tailwind CSS and Alpine.js. The reduction in JavaScript alone is dramatic, and the architecture is built for the way modern browsers work. Stores that move from Luma to Hyvä typically see Lighthouse mobile scores move from the 20–40 range to above 90 without any change to the Magento backend.

KiwiCommerce’s Hyvä Bronze Partnership means the team has verified delivery capability on this framework. Our Hyvä theme development service and our guide on optimising a Hyvä website cover both the build and the post-migration tuning that keeps scores high as the store grows.

Every agency on this list was assessed on their verifiable Magento performance credentials not general development capability. We looked at certification level, whether their performance service is a defined specialism or a line item in a broader offer, evidence of backend as well as frontend optimisation capability, and UK or UK-timezone delivery where possible.

Agencies with Adobe Gold or Platinum Partner status, teams significantly larger than KiwiCommerce, or documented enterprise client portfolios at a scale above most Magento stores in the UK market were excluded. This list is built for UK merchants with mid-market Magento stores who need credible, accessible performance help, not enterprise procurement budgets.

Performance problems rarely fix themselves. A slow page speed score today gets worse as your catalogue grows, your extension stack expands, and traffic increases. The stores that perform best long-term are the ones that audit first, fix the right problems in the right order, and keep a certified team monitoring performance over time.

KiwiCommerce’s Adobe Commerce Certified team has been optimising Magento stores since 2016, from simple cache configuration to full Hyvä migrations on enterprise catalogues. Every optimisation project starts with an audit, so you understand exactly what you are paying to fix. Get in touch with the KiwiCommerce team to discuss your Magento performance.