Sleek vs Gorilla Accounting: Pricing, Features and Services Compared 2026

Who is Sleek?

Sleek is a modern accounting and business compliance provider, founded by entrepreneurs in 2017. Built around a tech-first approach and shaped by what fellow business owners actually need, Sleek’s goal is to cut through admin and free founders to focus on growth.

Every accountant a client works with is part of Sleek’s in-house UK team. That means no outsourcing, no disconnect, and one trusted partner for the long term.

Core services include:

• Company incorporation and corporate secretarial
• Fullaccounting and bookkeeping
• Payroll and compliance management
• Tax filing, planning, and ongoing advice
• SEIS/EIS, R&D tax credits, and crypto accounting

Sleek is a certified B Corporation, has supported over 450,000 businesses worldwide, and currently serves more than 15,000 active customers. New clients on Basic plans get SleekBooks, while Pro clients get Xero included.

Who is Gorilla Accounting?

Gorilla Accounting is a technology-driven UK accountancy firm built specifically for contractors, freelancers, sole traders and small limited companies. It was founded in Bolton in 2015 by Dan Fallows and Tim Murphy, and was acquired by Azets, a UK top-10 accountancy group, in June 2023, while keeping its own brand and team.

The firm is known for a single, transparent fixed fee and strong service ratings. It holds a Trustpilot score of 4.9 out of 5 from more than 2,100 reviews, with 95% rated five stars, and describes itself as the UK’s most trusted accountancy firm.

Its offering centres on:

• One all-inclusive limited company package at £119 + VAT per month
• Sole trader accounting at £59 + VAT per month
• Tiered landlord and buy-to-let accounting
• FreeAgent included free, with Xero available
• R&D tax claims, CIS accounting and IR35 reviews
• A £50 same-day-response Client Service Guarantee

Gorilla does not appear to package SEIS/EIS advance assurance or crypto accounting, and its standard payroll covers up to two employees. For contractors and freelancers who want one predictable fee and a dedicated accountant, it is one of the strongest specialists in the UK market.

How much do Sleek and Gorilla Accounting cost?

Sleek starts at £60/month for limited companies and Gorilla charges £119 + VAT per month, but the fairer comparison is what each fee actually covers once you are trading.

Gorilla keeps things deliberately simple. Every limited company pays the same £119 + VAT per month regardless of sector or turnover, and paying 12 months upfront earns a 10% discount. Sole traders pay £59 + VAT per month, and landlords pay a tiered fee based on portfolio size.

Sleek uses two limited company tiers built around stage of growth:

1. Accounting Basic from £60/month, covering bookkeeping, year-end accounts, Corporation Tax, VAT filing, Confirmation Statement, Director’s Tax Return, and payroll for 1-5 employees, with SleekBooks included.
2. Accounting Pro from £100/month, adding Xero and more advanced reporting for higher transaction volumes or more complex compliance.

What is included in Gorilla’s £119 + VAT package?

Gorilla’s limited company fee is genuinely all-inclusive for a single-director contractor setup. It covers:

• FreeAgent bookkeeping software, free, saving up to £330 a year
• Quarterly reviews of your bookkeeping data
• Financial statements and Corporation Tax return
• Quarterly VAT returns
• Payroll for up to two employees, plus P11D
• One Self Assessment tax return
• Confirmation Statement preparation, dividend and board minute documentation

Some items sit outside the fee as add-ons, including company formation at £160 inc VAT, registered office at £10 + VAT per month, extra Self Assessments at £150 + VAT, and Confirmation Statement submission at £50 + VAT.

Where the numbers favour each provider

The cheaper option depends entirely on your structure and growth plans:

• Single-director contractors: Gorilla’s flat £119 + VAT is clean and competitive, with FreeAgent included.
• Companies paying three or more people: Sleek’s payroll for 1-5 employees is included where Gorilla caps its standard payroll at two.
• Investment-stage startups: Sleek bundles SEIS/EIS and R&D support that Gorilla does not appear to package.

Sleek vs Gorilla Accounting: Who each provider suits best

Gorilla is purpose-built for the self-employed, while Sleek is built to cover a wider range of business types and stages. Matching the provider to your situation is the quickest way to decide.

Does Sleek or Gorilla offer better specialist tax support?

Sleek packages a wider range of specialist tax services, and crucially the ones that matter most as a business grows, while Gorilla concentrates its specialism on the contractor and freelancer market.

Sleek covers growth-stage and emerging-sector needs directly, includingSEIS/EIS advance assurance for startups raising investment,R&D tax credit claims for companies developing new products, and crypto accounting for UK tax compliance. These are not edge cases. They are the services that decide whether a scaling company can raise funding efficiently and reclaim what it is owed, and Sleek bundles them into the same relationship rather than treating them as a separate engagement.

Gorilla also offers R&D tax claims and CIS accounting, and provides IR35 reviews, which is valuable for contractors assessing their status. What it does not appear to package is SEIS/EIS advance assurance or crypto accounting.

The practical takeaway:

• If your needs stay firmly contractor-focused, Gorilla’s specialism is a real strength.
• If you plan to raise equity investment, the absence of packaged SEIS/EIS support is a meaningful gap that could send you looking for a second adviser.
• If you want one provider that already has the specialist tax work in place before you need it, Sleek removes that future friction.

Gorilla Accounting vs Sleek: Software and support

Both providers pair a dedicated UK accountant with cloud software, but the software models differ.

Gorilla includes FreeAgent free with every package, saving up to £330 a year, and offers Xero with the basic licence included and premium licences at a discount. As aXero Platinum partner, Sleek includes Xero on Pro plans, while Basic clients use SleekBooks, with the option to switch to Xero as the business grows.

On support, Gorilla’s standout is its Client Service Guarantee: contact them before 3pm on a working day and you get a same-day response or a £50 payment. Sleek offers same-day responses during UK business hours with unlimited email and phone support, plus document submission via the platform, email or WhatsApp.

Both models work well. The deciding factor is usually whether you prefer FreeAgent’s contractor-friendly interface or Sleek’s flexibility between SleekBooks and the wider Xero ecosystem.

Sleek vs Gorilla Accounting: Company formation and getting set up

Both providers can incorporate your company, but the routes and pricing differ.

Gorilla handles the full incorporation process for £160 inc VAT, including Companies House registration, certificate of incorporation, memorandum and articles, share certificates, VAT registration and a Mettle by NatWest bank account, often same day. Sleek offers two routes toincorporation: a low-cost basic registration from £2.99 plus the £100 Companies House fee via its sister site, or a fully managed formation package bundling registered office, director service address and first Confirmation Statement filing.

If you only need a clean, fast formation alongside contractor accounting, Gorilla’s single fee is straightforward. If you want formation and ongoing accounting consolidated into packages that scale with you, Sleek’s bundled route fits better.

Gorilla Accounting vs Sleek: Customer reviews

Both providers are strongly rated, and review scores are one of the clearest signals of how each treats its clients day to day.

Gorilla Accounting holds a Trustpilot score of 4.9 out of 5 from more than 2,100 reviews, with 95% rated five stars. Customers frequently praise the responsiveness of their dedicated accountant and the clarity of the fixed fee. It is one of the highest-rated firms in the contractor accounting space.

Sleek holds a Google rating of 4.8 out of 5 from over 4,100 reviews, alongside a 95% client satisfaction rate drawn from 16,000 surveyed clients. Feedback consistently highlights the quality of the dedicated UK accountants and the responsiveness of the in-house team.

Both score highly, and the gap in headline ratings is narrow. The more useful question is not who is rated higher, but which service model fits the way your business actually works.

Sleek vs Gorilla Accounting: Onboarding and switching

Switching accountant should feel straightforward, not stressful. Both providers handle the move for you, with a few differences worth weighing.

Switching to Sleek

• Free company formation when you also take an accounting package
• 50% off your accounting package when you incorporate
• Full setup for Making Tax Digital
• Bank feeds and app integrations connected for you
• Complete handover from your previous accountant
• Guided onboarding call with clear next steps
• 30-day money-back guarantee

Switching to Gorilla

• Streamlined switching process, with Gorilla dealing with your previous accountant on your behalf
• FreeAgent set up as part of onboarding
• Dedicated accountant assigned from the start
• Same-day-response guarantee from day one

Both make switching painless. The difference is what happens after onboarding. Sleek’s 30-day money-back guarantee and bundled formation discount lower the risk of committing, while Gorilla’s strength is speed of setup for a contractor who already knows exactly what they need.

Sleek vs Gorilla Accounting: Certifications and credentials

Credentials are not the whole story, but they signal how each provider is viewed and governed.

Both carry strong credentials. Sleek’s lean toward security certifications and B Corp status, while Gorilla’s reflect its accountancy accreditations and backing from a large group.

Sleek vs Gorilla Accounting: Which provider is right for you?

Both providers are well rated and both give you a dedicated UK accountant. But for a business that intends to grow, Sleek’s wider scope gives it a clear edge.

Choose Sleek if you want:

• An accountant that supports you across the full journey, from incorporation through to your first limited company year and well beyond, so your flexibility to grow is never capped by your provider
• The specialist services that growing businesses depend on, with SEIS/EIS advance assurance and R&D tax credits already built in rather than missing or outsourced
• Payroll for 1-5 employees included from the £60/month entry plan, where Gorilla’s standard payroll stops at two
• Coverage across startups, ecommerce, contractors and scaling companies under one roof, so changing direction never means changing accountant
• One provider whose packages are designed to expand with you, removing the cost and hassle of switching as your needs broaden

Choose Gorilla Accounting if you want:

• One flat, all-inclusive fee built specifically for contractors, freelancers and sole traders
• FreeAgent included free, with Xero available
• A £50 same-day-response guarantee
• A specialist firm focused tightly on the self-employed

For a contractor who wants simplicity today and expects little to change, Gorilla is a strong, focused choice. But if there is any chance you will raise investment, claim R&D relief, hire beyond two people, or move into a new sector, Sleek is built to carry you through all of it without you ever outgrowing your accountant. That growth headroom is where Sleek pulls clearly ahead.

How Sleek helps with your accounting

Sleek’scontractor and limited company accounting is built around predictable monthly pricing, a dedicated UK accountant working alongside you year-round, and specialist support for the moments your business needs more than standard compliance.

From everyday bookkeeping through to SEIS/EIS advance assurance and R&D tax credit claims, Sleek covers the full lifecycle of a UK business under one fixed monthly fee, with the flexibility to scale as you grow.