How much does custom software development cost in London?

We don't publish a starting figure for custom software, because scope varies too widely for one to mean anything — a focused internal tool and a regulated platform replacement are different projects entirely. Legacy replacements in particular cost more than clients expect, not because the new system is complex but because data migration and parallel running are genuine work. We price three ways: fixed cost once scope is agreed, hourly from GBP 15 for standard work, or a dedicated developer from GBP 2,000 per month with a discount on longer retainers. Tell us what you're trying to do and we'll tell you which fits.

Can you replace our legacy system without downtime?

Usually, through phased cutover — running old and new in parallel, migrating in stages, and reconciling data before switching. It costs more than a big-bang replacement and it is almost always the right call for a system the business depends on daily.

Do you work with FCA-regulated businesses?

Yes. In practice this means designing for auditability from the start: logged access, immutable records of who changed what, and documented change control. Retrofitting these after a regulator asks is far more expensive than building them in.

How do you handle UK GDPR?

As architecture rather than paperwork. That means deciding where data physically sits, implementing retention rather than just writing a policy, and making subject access requests answerable through the system instead of a developer running ad-hoc queries.

Are you based in London?

Our team is in Kolkata and we work with UK clients across London and the wider market. We say this plainly because it is relevant to how you buy: you get a lower delivery cost and an in-house team with no subcontracting, but not someone who can be in your office on Thursday. For most software work that trade is worth making; if it is not for you, better to know now.

📞+44 7446 912816

London, United Kingdom

Custom software development in London

★★★★★4.9/5 rating · 3,000+ projects delivered · 200+ clients worldwide

Fixed price · No long contracts · Delivered in weeks

Software built for London's regulated industries — where audit trails, data handling and integration with systems you cannot replace matter more than the tech stack.

London's business density is unmatched in Europe — with over 1 million active companies, competition for digital visibility is intense. Businesses here need solutions that scale fast and perform reliably under heavy demand.

Built exactly for your workflow — no compromises

Scales as your business grows

Full source code ownership

Ongoing support & maintenance included

Fixed-price guarantee

Your quote is your total. If scope doesn't change, the price doesn't change — no hidden fees, no surprise invoices.

Free consultation

2hr response time

Serving all United Kingdom cities

3,000+ projects delivered

4.9/5 average rating

NDA available on request

London, United Kingdom

Building custom software for London businesses

Most London software projects we are asked to quote are not greenfield. They are replacements — an insurance broker outgrowing a system built in the 2000s, a fintech that needs to move off spreadsheets before an FCA audit, a legal firm whose case management tool cannot support how the practice now works. The hard part is rarely the new build; it is migrating live data and integrating with systems that will not be retired.

London's regulatory density shapes this further. If you are FCA-regulated, auditability is a design constraint from the first sprint rather than a reporting feature added later. UK GDPR applies regardless of sector, and the practical questions — where data sits, who can reach it, how long you keep it, how you evidence a subject access request — are cheaper to answer in architecture than in remediation.

We scope against those constraints rather than discovering them at integration time.

Pricing: Fixed, hourly or monthly

Timeline: 8-16 weeks

Team: In-house, no subcontracting

Compliance: UK GDPR

Common work: Legacy replacement

How pricing works

Three ways to work with us on Custom Software

Scope varies too widely to quote a meaningful starting figure. Rather than publish a number that would not survive first contact with your requirements, here is how we actually price the work.

Fixed cost

Quoted on scope

per project

Agree the scope, get a fixed total. It does not move unless the scope does.

Hourly

From £15

per hour

For change requests, ad-hoc work, or when the scope is still forming. Specialist skills are quoted separately.

Dedicated developer

From £2,000

per month

A developer working only on your product. No recruitment, no notice period, and longer retainers are discounted.

A fixed price needs a defined scope, so we scope first and quote second. If you are not sure what you need yet, hourly or a dedicated developer is usually the better starting point.

Built for London

What building for the London market actually involves

The requirements below are specific to this market. They are the things that get discovered late and expensively when a project is scoped against a generic template.

Legacy replacement with live migration

Replacing a system that is still running the business. Phased cutover, data migration with reconciliation, and a rollback path — rather than a big-bang switch and hope.

Regulated-sector auditability

For FCA-regulated clients: immutable audit logs, role-based access with recorded permission changes, and documented change control that stands up to review.

UK GDPR by design

Data residency decisions made explicitly, retention policy implemented rather than documented, and subject access requests answerable without an engineer writing a one-off query.

Integration with what you keep

Most replacements still need to talk to an accounting system, a CRM, or a third-party platform nobody wants to touch. We treat those integrations as first-class scope, not an afterthought.

Build-versus-buy honesty

Some of what London firms ask us to build is better solved by configuring something off the shelf. We will say so before quoting, including when it means a smaller project or none at all.

What we offer

Our Custom Software services in London

Every solution is scoped and built for your London business — no off-the-shelf tools, no templates adapted from other markets.

Enterprise Software Development

Robust, scalable software built around your exact enterprise workflows — handles complexity off-the-shelf tools simply can't.

Business Process Automation

Replace manual, repetitive work with automated processes that run accurately, every time, without human input.

CRM & ERP Development

A CRM or ERP built around how your business actually operates — not one you have to adapt your processes to fit.

SaaS Product Development

From concept to live subscription product — architecture, build, billing integration, and launch handled end to end.

Custom Web Portals

Branded, secure portals that give employees, clients, or partners exactly the access and tools they need.

Workflow Management Systems

Digital workflows that move tasks, approvals, and data through your team automatically — nothing falls through the cracks.

The London market

Custom Software in London: what local businesses need

Outright Solutions delivers Custom Software Development for London businesses with a clear focus on what local operators need — fast delivery, transparent pricing, and solutions built for the United Kingdom market.

Priced for United Kingdom

All projects quoted in GBP — from Quoted on scope, fixed price agreed before work starts.

United Kingdom compliance built in

GDPR-compliant by default — data handling, hosting, and contracts built to local standards.

Remote-first, fully accountable

London clients work with us 100% remotely — structured weekly reviews, live progress dashboards, and a dedicated contact throughout.

Our process

How we work

A simple, transparent process from first call to final delivery.

Free consultation

We learn about your London business, goals, and challenges in a 30-min call.

Proposal & scoping

You receive a clear proposal with timeline, fixed cost, and deliverables.

Build & review

We build in sprints with regular check-ins — no surprises, ever.

Launch & support

Go live with full handover, training, and ongoing support included.

3,000+

Projects delivered

200+

Clients worldwide

12+

Countries served

14+

Years of experience

Trusted credentials & technology partnerships

AWS Partner

Microsoft Azure

Shopify Partners

GDPR Compliant

ISO 27001 Aligned

NDA on Request

Est. 2012 · India

14+ Yrs Experience

Client reviews

What London businesses say

Real results from real clients across the UK, Netherlands and Belgium.

★★★★★

3 hrs/day saved

"Outright Solutions replaced our entire manual reporting workflow in London. What took our operations team 3 hours a day now runs automatically before 8am. The ROI was visible within 6 weeks."

James Mitchell

Operations Director, Logistics firm · London

★★★★★

70% queries automated

"We needed a scalable solution without hiring more staff. The platform they built now handles 70% of our customer queries without any human involvement — and customer satisfaction actually went up."

Sarah Patel

CEO, E-commerce retailer · United Kingdom

★★★★★

On time, on budget

"We'd been burned by agencies before. Outright were different — weekly updates, transparent costs, and they flagged a potential issue before it became a problem. Already on our second project with them."

Ravi Kumar

CTO, FinTech startup · United Kingdom

📂 Client case study

How a United Kingdom business grew 3× with Custom Software

Full breakdown — timeline, technology, and measurable results

Request case study →

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No sales pitch — just an honest conversation about whether we can help.

★★★★★Join 200+ businesses — 4.9/5 average rating

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Outright Solutions is a global web and software development agency, headquartered in Kolkata, India, delivering Custom Software Development to businesses in London and across the UK, Europe, and the UAE. Projects are quoted at a fixed price before work begins — starting from Quoted on scope — with no long-term contracts and no outsourcing. Most London clients go live within 4–12 weeks, supported by a dedicated point of contact throughout.

💷 Fixed price — no surprises

🏗️ In-house team, no outsourcing

📅 4–12 week delivery

🤝 No lock-in contracts

Measurable results

What clients actually achieve

Concrete outcomes from businesses that chose the right technology partner.

ERP & Automation

68%

reduction in manual admin

A United Kingdom logistics business automated invoice processing and staff scheduling — saving 3 hours of manual work per day from week one.

E-Commerce

3.2×

increase in online revenue

A United Kingdom retailer relaunched with a custom storefront and checkout flow — conversion rate climbed from 1.4% to 4.5% within 60 days.

SaaS & Web App

11 wks

from brief to live product

A United Kingdom SaaS startup went from initial scope call to first paying customers — on time, on budget, zero post-launch bugs reported.

FAQ

Common questions

Everything you need to know before getting started.

★★★★★Trusted by 200+ businesses across the UK, EU & UAE

Seen enough? Let's talk.

Book a free 30-min call — no commitment, no sales pitch.

Book a free call →

Shekhar Chowdhury

Founder · Outright Solutions

Meet the founder

When you book a call, you're booking time with me.

I've been building software delivery teams since 2012. 14+ years working with agencies and businesses across Europe, the UK, and North America.

Most of my clients I onboarded personally on a 30-minute call. Many are still here five, six, seven years later. Some started with a small project — today they trust us with delivery for dozens of their clients.

If you book a call, you're talking directly to me. Not an SDR, not an account manager. I want to understand your business and tell you honestly whether we can help. And if we can't, I'll say so.

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