Web dev agency Not just brochures.
DayNight Studio is a web development company based in London, working with founders and product teams across the UK and worldwide. Whether you need a marketing site, a full web application, or an e-commerce rebuild, you get the same senior team from first call to launch, not a rotating bench of subcontractors. For AI chatbots and automation in London, see our AI agency London page.
Most web development companies in London specialise in one thing, then stretch to cover the rest. We built the studio around four related disciplines instead, so the same team that scopes your project also ships it.
Marketing websites
- Component-based front end
- Headless CMS handover
- Edge-rendered hosting
- Built-in analytics & SEO baseline
Ecommerce stores
- Shopify Hydrogen & bespoke checkout
- Subscriptions & loyalty
- ERP, PIM & email platform integrations
Web applications
- Product & UX strategy
- SaaS & CRM products
- AI agents
- Design systems at scale
- Custom CRM & pipeline tools
- Auth, billing & integrations
- From MVP to Series B
Ongoing support
- Monthly design & dev hours
- Priority Slack channel
- 24h response, day or night
Web development means sites and apps where the sale is high-value: demos, qualified enquiries, bid credibility, not mass-market checkout. We build for SaaS, professional services, construction and studios selling commissions. Positioning detail on Web design; this page is the engineering view.
Off-the-shelf CRMs are built for the average business, which means every team ends up bending its process to fit the software. Custom CRM development flips that: pipeline stages, quote logic and integrations are built around how your team actually sells, not a generic template. It's part of our web application development work, and one of the areas we get asked about most.
Our clearest example is the NextFlow CRM case study, an all-in-one CRM we built for service businesses: lead capture embeds, a unified inbox, a quote builder, integrated payments and AI-drafted replies, shipped as a full product rather than a plugin. The same approach applies whether you need a lightweight internal CRM for your own sales team, or a CRM you plan to sell as a product.
DayNight Studio is a web development agency for custom websites, APIs and web applications. Claim plus named proof:
NextFlow CRM
- Custom CRM application built by DayNight Studio
- Lead capture, inbox, quotes, payments
- Live · nextflowcrm.com
Insighto
- Analytics platform developed by DayNight Studio
- Session replay & behavioural signals
- Full-stack SaaS product
CourseOS
- Learning platform built by DayNight Studio
- AI course builder & checkout
- Live · courseos.app
Web development services
- Engineering scope & APIs
- CMS, integrations & performance
- 30+ projects shipped overall
No single point of failure
A freelance web developer going quiet mid-project is one of the most common reasons founders come to us. As a studio, your project doesn't depend on one person's calendar.
- Named lead, backed by a team
- Documented scope & handover
- Continuity if priorities shift
Design and build in parallel
Most website development companies hand off between a design team and a separate development team, losing weeks in translation. We run both in the same room, on the same sprint.
- 6-week average delivery
- Daily progress updates
- Working software every sprint
Everything transfers to you
Source code, CMS access and design files move to your own accounts at launch. No lock-in, and no dependency on us to make future changes.
- Source in your own repo
- Hosting & CMS in your name
- Design files included
Not limited to London
We're based in London, but the majority of our web development clients are elsewhere in the UK, or outside it entirely. Every engagement runs async-first, so location isn't a constraint.
- UK-wide & international clients
- Async-first communication
- Video calls when useful, not default
What does a web development agency actually do?
A web development agency scopes, designs and builds the software behind a business: marketing websites, e-commerce stores, and web applications like dashboards or SaaS products. Unlike a freelancer, an agency brings a full team, so design, engineering and QA happen together rather than being handed off between separate contractors.
How much does web development cost in the UK?
At DayNight Studio, marketing sites are £1,000-£2,500, e-commerce builds £2,000-£6,000, and full web applications or SaaS platforms from £3,000/sprint. Every quote is fixed after scoping, with no estimate creep once the sprint starts.
Do you only work with businesses in London?
No. We're based in London, but most of our web development clients are elsewhere in the UK or abroad. Engagements are run async-first with regular written updates, so being outside London makes no practical difference to how a project runs.
What's the difference between a website and a web application?
A website is mostly about presenting content, like a marketing site or an online store. A web application is interactive software people log into and use repeatedly, such as a dashboard, CRM or SaaS product. We build both, and can advise which one actually fits your problem before you commit to either.
Should I hire a freelance web developer or an agency?
For a very small, low-stakes site, a freelancer can be the more cost-effective option. Once a project has real business impact, though, agency structure (a documented scope, a team instead of one person, and formal handover) reduces the risk of a stalled or abandoned build. Not sure which you need? Send the brief and we'll say which.
Can I hire an agency to build a Custom website?
Yes. DayNight Studio builds Custom websites and web applications for high-value service businesses: positioning, lead capture, CRM hooks and optional AI qualification. Positioning on Web design; engineering detail on this page. Marketing sites £1,000-£2,500; web apps from £3,000/sprint.
Do you build custom CRM systems?
Yes. Custom CRM development is one of our most requested web application projects, from an internal sales tool built around your specific pipeline to a full CRM product like NextFlow CRM, which we built and shipped as a standalone SaaS. Pricing follows the same Web application development tier, starting from £3,000.