How much does a website cost in London?

For most UK small businesses, a custom WordPress website costs between £2,500 and £8,000 depending on scope. Shopify e-commerce stores typically run £4,000–£12,000. Custom Next.js builds for SaaS or complex web apps start at £8,000 and scale up. WebAnts gives you a flat written quote after a free 30-minute discovery call, no estimates, no surprises.

How long does it take to build a website?

A focused marketing or landing site takes 2–4 weeks at WebAnts. A full WordPress build runs 4–6 weeks. Shopify e-commerce projects run 3–5 weeks. Custom web applications take 6–12 weeks. Our median delivery is 1.8× faster than the UK industry average (based on Clutch.co reported timelines for London-based web agencies).

Do I need to pay a deposit upfront?

No. WebAnts does not require a deposit. You pay against agreed milestones, design approval, development handover, launch, so you only ever pay for work you can see.

Do you only work with clients in London?

No. WebAnts is based in London but we work with clients across the UK and 14 countries internationally.

Can you redesign my existing website without losing my Google rankings?

Yes. Every redesign project at WebAnts starts with an SEO audit of your current site so we can preserve every URL, redirect, and ranking signal that's currently earning traffic. We also bake AIEO (AI Engine Optimisation) into every redesign.

What's the difference between SEO and AIEO?

SEO ranks you in traditional search engines like Google. AIEO (AI Engine Optimisation) gets you cited inside answers from ChatGPT, Claude, Perplexity, and Google's AI Overviews. By 2026, ~30% of UK B2B research happens inside AI assistants before users ever click a search result. WebAnts is one of the few UK agencies optimising for both.

(Web App Development)

Custom web applications
built around
your business.

Name: WebAnts
Price range: ££

WebAnts is a London web app development agency building bespoke web applications, SaaS platforms, and internal tools, from MVP to production-grade, with auth, billing, and everything in between. No prepayment required.

★★★★★ 4.9 on Google★★★★★ 5.0 on ClutchTop Web Designers 2025, DesignRush

Free quote

Tell us about your
web app project.

Flat written quote, same day.

What we do

WebAnts is a London web design and development agency specialising in custom web application development. We build bespoke SaaS platforms, internal tools, and client portals for businesses that have outgrown off-the-shelf software.

TypeScript throughout. Clean architecture. Tests as a deliverable, not an afterthought. No offshoring, no prepayment, no account-manager ping-pong.

100+

projects shipped

1.8×

faster than industry average

4.9★

rated on Google, Clutch & Upwork

£0

deposit, milestone payments only

Web app services

Eight types of web app.
All built in-house.

SaaS Platform Development

End-to-end SaaS builds with user auth, Stripe billing, team management, role-based access, and the admin dashboard your support team needs from day one.

Internal Business Tools

Replace spreadsheets and disconnected apps with a custom internal tool, data entry forms, approval workflows, reporting dashboards, and integrations with your existing systems.

Client Portals

Branded portals where your clients log in, view project status, download documents, raise tickets, and communicate with your team, white-labelled to your brand.

Workflow Automation Tools

Web apps that replace manual processes, form submissions trigger emails, Slack messages, database updates, and third-party API calls automatically, without Zapier limits.

Data Dashboards & Reporting

Real-time dashboards pulling from multiple data sources, Stripe, your database, Google Analytics, Airtable, visualised clearly for the decision-makers who need them.

Multi-tenant Applications

Web apps serving multiple organisations from a single codebase, isolated data per tenant, per-tenant billing, and role-based access for each organisation's team.

Integration Platforms

Connect two or more third-party services with custom logic that Zapier can't handle, field mapping, error handling, retry logic, and a full audit log.

Legacy App Modernisation

Rebuild a slow, outdated web app with a modern stack, without losing data, institutional knowledge, or your users. Migration handled safely with zero downtime.

How we work

Four phases.
Architecture first.

Discovery

A free 30-min call to scope requirements, user flows, data model, integrations, and technical constraints. Written proposal and flat quote the same day.

Architecture

ERD, wireframes, component design, API contracts, and tech stack confirmation, all documented and agreed before a line of code is written.

Build & Test

TypeScript throughout. Iterative weekly demos on staging. Unit and integration tests. CI/CD pipeline from day one. Docker container for local development.

Launch & Handover

Production deployment, full repo handover on GitHub, user documentation, and a codebase walkthrough. Two weeks post-launch support included.

What you get

Deliverables

↳Source code on GitHub, fully owned by you
↳TypeScript throughout
↳Figma design files
↳Unit and integration test suite
↳CI/CD pipeline (GitHub Actions)
↳Docker setup for local development
↳User and admin documentation
↳Two weeks post-launch support

Toolkit

React
Next.js
TypeScript
Node.js
PostgreSQL
Supabase
Stripe
Auth0 / Clerk
Prisma
Redis
Vercel
AWS
Figma
Zod

Who we build for

Web apps for every
type of business.

Logistics & Operations

TrackingAutomation

Education & EdTech

LMSPortals

Client feedback

“WebAnts built something better than I’d ever imagined, shipped faster than any agency I’ve worked with.”
LaTisha Ebanks
Marketing Director, North Pointe Marketing
★★★★★ 4.9 on Google · ★★★★★ 5.0 on Clutch · ★★★★★ 5.0 on Upwork · Top Web Designers 2025, DesignRush

FAQs

Common
questions.

How long does a custom web app take to build?

A focused MVP with a single core workflow typically takes 6–10 weeks. A full-featured platform with auth, billing, admin tooling, and integrations takes 12–20 weeks. We'll scope the timeline honestly on the discovery call, and we deliver 1.8× faster than the industry average.

What's the difference between a web app and a website?

A website is primarily informational, people read it. A web app is interactive, people use it to do something: log in, manage data, process payments, or automate a workflow. Most of what WebAnts builds sits on the web-app end of this spectrum.

How much does custom web app development cost?

A focused internal tool or client portal typically starts from £10,000. A full SaaS platform with auth, billing, admin, and a marketing site starts from £25,000. These are flat-quote projects, no hourly estimates, no surprises.

Do you build from scratch or use existing frameworks?

We build on proven frameworks, Next.js for the front end, Node.js or NestJS for the back end, PostgreSQL for the database. We don't reinvent the wheel, but we don't use low-code tools that limit what you can build. Everything is custom-coded and fully owned by you.

Can you build a web app that connects to our existing systems?

Yes. We integrate with any system that has a REST API, GraphQL API, or webhook capability, Salesforce, HubSpot, Xero, QuickBooks, Google Workspace, Slack, and hundreds of others. We also integrate with legacy systems via SFTP, CSV import, or direct database connections where needed.

Do you offer post-launch support?

Yes. Every project includes two weeks of post-launch support. After that, we offer ongoing support on an as-needed basis or a monthly retainer, bug fixes, new features, performance optimisation, and infrastructure management. No lock-in.

Get started

Ready to build your
web application? →

Free 30-minute discovery call. Flat written quote. No prepayment.

Book a free call See our work

WebAnts Ltd · London, UK · hello@webants.io · +44 20 3983 9795

Custom web applicationsbuilt aroundyour business.

Eight types of web app.All built in-house.