Best Staff Augmentation Companies in the UK? How to Compare (2026)

There is no single best staff augmentation company in the UK. The right provider depends on your stack, how many engineers you need, where you want them to sit and how long you will need them. What you can do is compare providers on the same facts. Below we explain how, then set six staff augmentation companies side by side, A to Z. Each entry gives where it is based, what it offers, who it says it serves, its published prices and its Clutch rating.

We wrote this list, so here is the disclosure up front. CodeLeap offers staff augmentation and is one of the six. The providers are in alphabetical order, and being listed is not a ranking or an endorsement. Every fact about a provider comes from its own website and its Clutch profile, as we checked them on 1 November 2026. If a detail is wrong or out of date, the provider can tell us and we will correct it.

Key takeaways

• No UK staff augmentation provider is the best for every team. Fit depends on your stack, the number of engineers, where they sit and the terms.
• The six providers below are in alphabetical order. This is not a ranking, and CodeLeap, which wrote the list, is one of them.
• A London address does not tell you where the engineers sit. Ask each provider which countries and cities your engineers would work from.
• Compare terms as well as prices: notice periods, minimum terms, replacement promises and how each engineer is engaged for IR35.
• Shortlist three providers, send each the same one-page brief, and ask the same questions on the first call.

Is there a best staff augmentation company in the UK?

No single provider is the best for every team. A provider that suits a start-up adding one Python engineer can be the wrong choice for a bank adding twenty, and the reverse is also true.

A ranked list reflects the criteria of whoever wrote it, and those may differ from yours. This guide does not rank anyone. It shows you how to compare and puts the facts for six providers in one place.

What do onshore, nearshore and offshore mean?

They describe how far the engineers sit from you, which changes your working hours, your meetings and your costs. The labels are loose, so use them to prompt questions.

• Onshore: engineers based in the UK, who share your working day and can meet you in person.
• Nearshore: engineers in a nearby time zone, often elsewhere in Europe, so most of the working day overlaps with yours.
• Offshore: engineers far away, such as in India, where the overlap is shorter and meetings are planned around it.

Providers use these words differently, so ask each one where the engineers who would join you work and how many hours they overlap with your day. The other five each list locations outside the UK next to their London or UK address, and our own team is remote and global. A UK office is not the same as UK-based engineers.

How do you compare staff augmentation providers?

Compare them on the same seven things, in writing.

1. Where the engineers sit. Ask for countries, cities and hours of overlap, as above.
2. How they vet engineers. Providers describe it differently. Uvik lists five gates, including 12 months working inside the firm and a final interview by your team. The Scalers describes a 7-step recruitment process. ZONE3000 says its recruitment team screens candidates and runs internal interviews. Ask whether you interview each person before they start.
3. How fast they start. These are the providers’ own claims. ZONE3000 says first qualified candidates arrive within 10 business days. Andersen says it allocates talent in 2 to 4 weeks, and N-iX says 3 to 4 weeks to fill a position. Put your start date in the brief and see who commits to it.
4. Terms and notice. On the pages we read, only Uvik states a notice period and a minimum term. It offers 30 days’ written notice with no long-term lock-in for embedded engineers, and a 3-month minimum for dedicated squads. Ours is rolling monthly with no long lock-in. Ask what you pay if you shrink the team.
5. Replacement. Uvik states that it replaces an engineer at no cost if you raise the issue in the first 30 days. We found no replacement terms on the other pages, including our own, so ask for them in writing.
6. Contract basis and IR35. Ask how each engineer is engaged and who decides their IR35 status. Our explainer on what staff augmentation is covers the definition, cost and IR35. This is not legal advice.
7. Rates. Most of the providers here publish none. Compare written quotes on hours, seniority, location and currency.

For the wider choice between a contractor, an agency and an employee, see our guide to how to hire a software developer in the UK.

Which providers did we include, and why?

We included a provider when it met all four of these tests:

• A UK office or UK company registration, shown on its own website.
• Staff or team augmentation offered on its own website.
• Public case studies.
• A Clutch profile with at least two reviews.

Candidates came from Clutch’s UK staff augmentation listing and a live search. We kept those where we could read both the website and the Clutch profile on 1 November 2026. Other providers meet the tests too, so the list is not complete. Some Clutch listings give London as a location for firms whose own websites name a headquarters elsewhere, so we give both where they differ.

We left out recruitment agencies and freelancer marketplaces. They introduce candidates, which is a different product from a firm that supplies engineers it employs or engages itself.

Each entry uses the same fields and only what the website and the Clutch profile say. We have added no judgements about quality. Prices are as published on each provider’s own site on 1 November 2026 and may have changed since. If you work at one of these providers and a detail is out of date, tell us through the contact form on this site and we will correct it.

Provider	Based in	Augmentation offer
Andersen	Warsaw HQ, London office	Staff augmentation, dedicated teams
CodeLeap	London	Embedded engineers, squads
N-iX	Malta HQ, London office	Team extension
The Scalers	Bangalore, London address	Offshore team extension
Uvik Software	Tallinn HQ, Ipswich office	Staff augmentation, squads
ZONE3000	London	Team augmentation, dedicated teams

Staff augmentation companies in the UK, A to Z

The order is alphabetical by name, ignoring “The”. The Clutch figures are as shown on each profile on 1 November 2026.

Andersen

• Based in: its website lists a London representative office at 1 St Katharine’s Way and a Warsaw headquarters, with development centres in Munich and Kraków. Clutch lists Warsaw as its headquarters, with London among its other locations.
• Offers: staff augmentation and dedicated teams. Its staff augmentation page describes the model as adding external specialists to existing teams for a defined scope or period.
• Says it serves: healthcare, eCommerce and fintech clients, among other industries.
• Prices: not published. Its page says costs depend on seniority, tech stack, location and engagement length.
• Clutch: 4.9 from 129 reviews.
• Case-study topics: an AI medical imaging solution for early Alzheimer’s diagnosis, and an application for Smart TVs.
• Source: its staff augmentation page.

CodeLeap (us)

• Based in: London. Founded in 2019, with a remote, global team led from London.
• Offers: staff augmentation, with embedded engineers and engineering squads, plus dedicated teams and a fractional CTO. Our page says the engineers are vetted, work under your management and process, and are matched to your stack and your interview.
• Says it serves: teams that already have technical leadership and need more hands.
• Prices: an embedded engineer is from £4,000 per engineer per month, rolling, and an engineering squad of two or more engineers is from £12,000 a month. There are no recruitment fees and no long lock-in. Dedicated teams are from £10,000 a month, rolling.
• Clutch: 4.9 from 9 reviews.
• Case-study topics: our staff augmentation page cites engineers still embedded in the ongoing team on our claims platform work.
• Source: our staff augmentation page.

N-iX

• Based in: its website gives Malta as headquarters and a London office at 6 Bevis Marks, among locations that include Poland, Ukraine, Bulgaria, Romania, Colombia and India. Clutch lists Malmö, Sweden as headquarters, with London among its other locations.
• Offers: team extension, which its page describes as growing your team with AI-augmented engineers.
• Says it serves: enterprises. Its homepage cites 90+ enterprise clients.
• Prices: not published.
• Clutch: 4.8 from 35 reviews.
• Case-study topics: AI-assisted coding at a SaaS company, and digital transformation and managed services on AWS for a transportation company.
• Source: its team extension page.

The Scalers

• Based in: its website lists addresses in London (30 Churchill Place), Dublin and Bangalore, and says it builds engineering teams in Bangalore, India. Clutch lists Bengaluru as its headquarters, with London among its other locations.
• Offers: team augmentation, which it calls team extension and describes as an offshore staffing model, plus offshore dedicated development teams.
• Says it serves: companies building and scaling engineering teams in Bangalore.
• Prices: not published as figures. Its page describes an all-inclusive cost model that covers salary, equipment and admin.
• Clutch: 4.8 from 11 reviews.
• Case-study topics: a team to modernise a legacy product after an SAP talent shortage, and a 50-person engineering team built in Bangalore.
• Source: its team extension page.

Uvik Software

• Based in: its website gives Tallinn, Estonia as headquarters and a UK commercial office in Ipswich. Uvik Software is the trading name of UVIK SOLUTIONS LIMITED, registered in England and Wales. Clutch lists London as its headquarters and Tallinn as its other location.
• Offers: Python-first staff augmentation, plus dedicated squads with a tech lead.
• Says it serves: product teams in the US, UK and Europe.
• Prices: $50 to $99 per engineer hour by role and seniority, which its page works out at about $8,800 to $15,840 a month for one full-time engineer. They are shown in US dollars and we have not converted them.
• Clutch: 5.0 from 38 reviews.
• Case-study topics: a real-time command-and-control platform, and an AI support assistant for a sports equipment retailer.
• Source: its homepage.

ZONE3000

• Based in: its website lists a London office at 3 Hornton Place and a Dubai office. Clutch lists London as its headquarters, with Dubai and Lviv among its other locations.
• Offers: team augmentation and dedicated teams.
• Says it serves: its pages list industries including high-tech, banking and financial services, and healthcare.
• Prices: not published.
• Clutch: 5.0 from 14 reviews.
• Case-study topics: an AI analytics solution for medical affairs, and a forecasting system for a building materials manufacturer.
• Source: its team augmentation page.

How should you read the Clutch ratings?

Clutch says it verifies reviews using reviewer-provided information and online research. Where it cannot verify the reviewer’s identity or project details but the information is still useful for buyers, it says it publishes the review as Not Verified (Clutch Help Center). So look for that marker on the profiles you read.

Then read each rating beside its review count. The counts above range from 9 to 129, and a rating from a handful of reviews tells you less than the same rating from dozens. Check the date of the latest review, and read the critical ones too.

A Clutch rating covers every service on the profile, including work other than augmentation. Clutch shows IT staff augmentation as 100% of The Scalers’ service lines, 40% of Uvik’s, 30% of ZONE3000’s, 10% of Andersen’s and 7% of N-iX’s. Our profile lists no staff augmentation line, so read the reviews for the kind of work you are buying.

Profiles also show a minimum project size in US dollars: $5,000+ for us, $25,000+ for Uvik, $50,000+ for Andersen and ZONE3000, and $100,000+ for N-iX. The Scalers’ profile shows it as undisclosed. Check each against your budget.

How do you shortlist from here?

Work through five steps.

1. Decide what you are buying. One engineer for a skill gap, a squad for a roadmap and a team that runs delivery are three different products. If nobody on your side can direct engineers, augmentation is the wrong fit.
2. Pick three providers. Choose the ones whose location, offer and case studies sit closest to your job.
3. Send all three the same one-page brief. Cover the stack, the work, who directs it day to day, your start date, how long you expect to need the engineers and the hours of overlap you need.
4. Ask the same questions on a first call. Who would join us, and can we interview each person? Where do they sit? How is each engineer engaged for IR35? What are the minimum term and notice period? What happens when someone is a poor fit or leaves? Can we speak to a client with a similar team?
5. Test before you commit. None of the six entries above mentions a trial period on the pages we read, so ask whether one exists and get the terms in writing. A small first task with a named reviewer gives you your own trial.

Where CodeLeap fits, and your next step

We fit when you have a technical lead who can direct the work and need more engineers inside your team in weeks. Staff augmentation starts from £4,000 per engineer per month, rolling, with no recruitment fees and no long lock-in. A squad of two or more engineers starts from £12,000 a month.

We fit when you need more than extra hands. A dedicated team from £10,000 a month is managed by us and accountable to you for delivery, and a fractional CTO from £3,000 a month gives you senior direction.

We do not fit when you need engineers in your office every day, because our team is remote. We are a team of around 28, so a request for a large block of engineers at once may suit a larger provider better. Python and Django are our deepest bench. If your stack is different, tell us and we will say plainly whether we are the right fit.

Whoever you choose, write the one-page brief from step three, send it to three providers from this list or your own research, and compare what comes back.

If you want us to be one of the three, a free 20-minute consultation will tell you whether staff augmentation, a dedicated team or another route fits.