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SaaS · London

SaaS Product Development Company in London, built to ship.

The first ten users and the ten-thousandth need different architecture, and the gap between them is where most SaaS products stall. We design and build multi-tenant systems with subscription billing and infrastructure that carries you across that gap without a rewrite. From MVP to enterprise-ready platform, a dedicated team owns the codebase with you. You scale, we keep it sound. London (GMT, or BST in summer) sits 5.5 hours behind India (IST), which is the most convenient overlap of any major Western market because your morning is our afternoon and the two working days share a large chunk of live, productive hours.

Free scope and estimate in 24 hours. No pitch, no obligation. You own the code and IP, and we sign an NDA on request. Privacy Policy.

Rated 4.9 stars across 24+ client projectsYou own 100% of the code and IP. NDA on request.

London market

London is Europe's leading technology hub and ranked third globally in Startup Genome's 2025 ecosystem report, with UK tech raising 12 billion USD in the first nine months of 2025. Its fintech sector is the strongest in Europe and second only to the United States, which keeps demand high for custom software, payment platforms, dashboards and mobile apps. Geminate Solutions acts as the remote product and engineering arm for London founders and businesses that need to move quickly without overstretching local hiring budgets.

Local signal: The UK tech ecosystem recorded 12 billion USD in funding in the first nine months of 2025, with London's fintech sector confirmed as the number one fintech hub in Europe and second globally.

Fintech and paymentsEnterprise software and SaaSMedia and entertainmentHealthtech and life sciencesE-commerce and retail

4.9★

Client rating across 24+ projects

250K+

daily active users on apps we built

10M+

requests per minute handled

50+

products shipped worldwide

What we build

SaaS Product Development for London teams, end to end

01

Multi-tenant SaaS platforms with tenant data isolation via row-level security or schema-per-tenant

02

Subscription and usage-based billing built on Stripe, with proration, invoicing, and dunning for failed payments

03

Role-based access control, team workspaces, and granular admin panels

04

API-first backends with documented REST or GraphQL endpoints and webhooks for integrations

05

Auto-scaling cloud infrastructure with CI/CD pipelines, monitoring, and alerting

06

Enterprise SSO through SAML 2.0 and OAuth 2.0 with audit logging

Your time zone

London (GMT, or BST in summer) sits 5.5 hours behind India (IST), which is the most convenient overlap of any major Western market because your morning is our afternoon and the two working days share a large chunk of live, productive hours.

Your IP, your code

You retain full IP ownership, we sign an NDA up front, and our English-fluent team is set up to work to UK contract and GDPR expectations so London clients can offshore with confidence.

Priced in GBP

Transparent, milestone-based, scoped on a free call. No hidden costs and no lock-in.

Compliance in United Kingdom

How does SaaS Product Development stay compliant with UK GDPR in London?

London companies build under the UK GDPR and the Data Protection Act 2018, overseen by the Information Commissioner's Office (ICO). We design every saas engagement to respect those rules from day one, not as a checklist bolted on at the end. Moving personal data from the UK to India relies on safeguards such as the International Data Transfer Agreement, which we put in place so your processing stays lawful end to end.

Who regulates you

the Information Commissioner's Office (ICO). the FCA layers extra operational-resilience and outsourcing expectations on financial services, which we design around for regulated clients.

Where your data lives

You pick the hosting region. When residency rules or a United Kingdom contract require it, we deploy inside your jurisdiction and you hold the cloud accounts.

What you own

100% of the source code and IP, transferred under contract, with an NDA and a data processing agreement signed before anything is shared.

Proof we can do this at scale: the products we have shipped run at 250K+ daily active users and have handled 10M+ requests per minute, across 50+ products rated 4.9 stars over 24+ client projects. Security and data handling are part of how we build, not an afterthought.

FAQ

SaaS Product Development in London, answered

Can you build an MVP for my SaaS idea and scale it later?
Yes. We build SaaS MVPs that can take real money on day one, with multi-tenant architecture and Stripe billing in place so you can onboard paying customers from launch. The same dedicated team then extends the product as you add analytics, team features, and an API.
How do you handle multi-tenancy and tenant data isolation?
We isolate tenant data at the database level using row-level security or a schema-per-tenant approach, chosen to fit your security and performance needs. This keeps each customer's data separated while the application still shares infrastructure efficiently.
Do you have experience building toward SOC 2 and enterprise security requirements?
SOC 2 Type II is the bar we build to, with documented security controls, encryption at rest and in transit, access management, and a complete record of who touched what. We also implement enterprise SSO with SAML 2.0 and OAuth 2.0 and GDPR-ready data export and deletion workflows so enterprise buyers clear their checklist.
How much of the working day do London and India actually share?
London is 5.5 hours behind our India team, which gives one of the best overlaps we work with. Your full morning is our afternoon, so live calls, code reviews and approvals happen in real time without anyone working unsociable hours.
Is offshore development with Geminate Solutions more cost-effective than a London agency?
London carries some of the highest developer rates in Europe, so an offshore product partner usually reduces your build cost substantially while keeping delivery quality high. We scope the exact cost on a call once we understand your product, rather than listing a headline rate.
How do you handle UK GDPR and data protection for London clients?
London businesses fall under the UK GDPR and the Data Protection Act 2018, overseen by the Information Commissioner's Office (ICO). Moving personal data from the UK to India relies on safeguards such as the International Data Transfer Agreement, which we put in place so your processing stays lawful end to end. Before any data is shared we sign an NDA and a data processing agreement, and the FCA layers extra operational-resilience and outsourcing expectations on financial services, which we design around for regulated clients.
Where will our data and code be hosted if we build with you from London?
You choose the region. We default to a cloud setup that satisfies UK GDPR obligations, and when residency rules or a United Kingdom contract require it, we host inside your jurisdiction. You keep full ownership of the source code, the data, and the infrastructure accounts at all times.
How much does SaaS Product Development cost in London?
Every saas project is scoped on a free call rather than sold as a fixed package, and most engagements start with a paid pilot sprint so you see the work before you commit. You get a clear number in GBP before anything starts.
Do we own the code?
Yes, completely. The code, the project, and the content are handed to you. You hold the keys, not us. We sign an NDA before you share anything.
How long does it take?
Most builds go live in two to four weeks. Larger products with a custom backend or migration take longer, and you get a firm timeline before any work begins.

Start in London

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Tell us what you want to build. A senior engineer sends a clear scope and estimate within 24 hours. No pitch, no obligation.

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A senior engineer replies within 24 hours with a scope and estimate. Free, no pitch, no obligation. You own the code and IP, NDA on request. Privacy Policy.

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