Overview
SaaS website projects in the UK vary more than almost any other type of web project. A seed-stage company that needs a credible 10-page site and a Series B company rebuilding their entire go-to-market presence are both asking how much does a SaaS website cost, and the answers are completely different.
This guide gives you the realistic investment bands, explains what drives cost up and what does not, and covers the variable that most agencies underestimate: copywriting.
In this article:
- Why SaaS website costs vary so much
- The three investment bands
- Copywriting: the most significant variable
- What drives cost up
- Hidden costs most agencies do not mention
- How to get the most from your budget
- Frequently asked questions
This article is part of the complete guide to SaaS web design.
1. Why SaaS website costs vary so much
Three factors make SaaS website pricing more variable than other B2B website projects.
First, the scope of what a SaaS website needs to do varies enormously by growth stage. A pre-launch MVP site and a multi-product enterprise platform with use-case pages for six audience segments, an interactive pricing calculator, and a resources hub are both SaaS websites, but they are not the same project.
Second, messaging and copywriting are a more significant component of a SaaS project than most. Communicating a software product through words and structure requires specialist SaaS copywriting that most agencies either do not offer or underscope. The difference between a site with well-crafted outcome-first copy and one with generic feature descriptions is visible in conversion rates.
Third, the CMS choice affects the build cost more than in other project types. A Webflow build and a HubSpot CMS build with full CRM integration and smart content setup can differ by £8,000 to £15,000 even with identical designs.
2. The three investment bands
Early stage: £8,000 to £18,000
What you get: a focused site of 10 to 20 pages covering homepage, product overview, pricing, social proof or case studies, and contact. Built on Webflow or WordPress. Strategy and UX included at a level appropriate for early-stage priorities.
What you do not get: deep use-case page development, an enterprise-grade content architecture, or full copywriting. Content is typically either provided by the client or produced on a strategic guidance basis.
Best for: pre-seed to seed-stage SaaS companies that need a well-designed, credible presence quickly without the overhead of a comprehensive build.
Growth stage: £18,000 to £40,000
What you get: a fully custom design, a thorough discovery and strategy phase, use-case and solution pages, a properly structured blog and resources section, an interactive pricing page, case studies, and CMS setup that gives the marketing team genuine independence. Typically 25 to 50 pages on Webflow or HubSpot CMS.
This is where Rudo operates most frequently with SaaS clients. Projects at this investment level are designed around commercial outcomes, not just a refreshed aesthetic. Copywriting is typically hybrid: Rudo writes core pages, the client handles the rest using our messaging framework.
Best for: Series A to Series B SaaS companies investing seriously in go-to-market and needing a website that functions as a pipeline generator.
Scale stage: £40,000 to £100,000 and above
What you get: comprehensive sites for established SaaS companies with multiple product lines, enterprise and SMB segmentation, multi-language capability, deep CRM integration and personalisation logic, and custom development for interactive product demos or ROI calculators.
Best for: Series B and beyond, multi-product SaaS platforms, or companies requiring bespoke technical development alongside design and content work.
| Stage | Typical investment | Pages | Copy approach |
| Early (pre-seed to seed) | £8,000 to £18,000 | 10 to 20 | Client-led with strategic guidance |
| Growth (Series A to B) | £18,000 to £40,000 | 25 to 50 | Hybrid (Rudo writes core pages) |
| Scale (Series B+) | £40,000 to £100,000+ | 50+ | Full copywriting |
3. Copywriting: the most significant variable
Of all the cost variables in a SaaS website project, copywriting is the one most often underestimated. A well-designed SaaS site with weak copy will not convert. Outcome-first messaging written by specialists who understand SaaS buyer psychology makes a measurable difference to demo request rates.
At Rudo we offer three copywriting tiers, and the choice has a significant impact on both cost and timeline.
Strategic guidance: client writes, we direct
Rudo provides detailed page-by-page copy outlines: the messaging hierarchy, the outcome claims for each section, the proof points to include, and the CTAs to use. Your team writes the final copy using these outlines as a structured brief.
Best for: SaaS companies with a strong internal writer who knows the product deeply. Cost addition: approximately £1,500 to £3,000. Timeline impact: minimal, if copy is delivered to the agreed schedule.
Hybrid: we write core pages, you handle the rest
Rudo writes the highest-stakes pages: homepage, pricing page, primary use-case pages, and the demo request page. Your team handles the remaining pages using our brand voice guidelines and messaging framework.
This is our most commonly chosen option. Cost addition: approximately £3,500 to £7,000. Timeline impact: approximately 1 week, as core page copy is delivered during the UX phase so design and copy develop in parallel.
Full copywriting: we write everything
Rudo writes every page on the site, from homepage through to case studies, team bios, use-case pages, and FAQ content. Chosen by SaaS companies undergoing a full repositioning, launching in a new market, or without in-house copywriting capability.
Cost addition: approximately £8,000 to £14,000 depending on page count. Timeline impact: 1 to 2 additional weeks, as a dedicated copy review round is added before design begins.
4. What drives cost up
- Number of unique page templates. Each distinct template requires design and development time. A homepage, a use-case page, a pricing page, and a blog post template are four templates regardless of how many pages use each one.
- Use-case and solution pages. Each use-case page requires distinct messaging, even when built on shared templates. The research and copywriting involved adds cost beyond the design work.
- Interactive elements. ROI calculators, interactive pricing tools, product tours, and animated feature demonstrations all require design and development time beyond standard page builds.
- CMS platform choice. HubSpot CMS projects cost more to build than equivalent Webflow projects due to CRM integration, smart content setup, and module development. The ongoing platform cost is also higher.
- Integrations. Connecting to CRM, product analytics, customer support, and marketing automation tools all add development time. The more integrations required, the higher the build cost.
- Copywriting tier. As outlined above, full copywriting adds 6,000 to 14,000 to a project. Strategic guidance adds 1,500 to 3,000.
5. Hidden costs most agencies do not mention
Ongoing platform and hosting costs
Webflow: £23 to £39 per month (included hosting, no separate cost). WordPress: £50 to £300 per month for managed hosting plus plugin licences. HubSpot Content Hub Professional: approximately £360 per month. Factor these into your year-one total cost before choosing a platform.
Post-launch retainer
A SaaS website is not finished at launch. New landing pages for product launches, campaign pages, A/B test variants, and feature announcement pages need to be built after launch. A post-launch retainer with Rudo typically runs £800 to £2,500 per month depending on the scope of ongoing work.
SEO and content
A well-structured SaaS site that is not producing ongoing content will not rank for competitive keywords over time. An SEO content programme, whether handled internally or by the agency, is a real ongoing cost that needs to be budgeted alongside the build.
| The total cost of ownership rule |
| Add 25% to 35% to the quoted project cost to estimate your first-year total, including platform costs, post-launch support, and any content production. A £25,000 build on HubSpot CMS with a light retainer has a first-year total cost of approximately £35,000 to £40,000. |
6. How to get the most from your budget
Prioritise the six high-impact pages
The homepage, pricing page, primary use-case pages, case studies, demo request page, and about page drive the majority of SaaS website conversions. Invest in these pages first. Secondary pages can be built at a lower specification or added in a phase two.
Choose the right copywriting tier for your team
If you have a strong internal writer, strategic guidance is the most cost-effective approach and still produces well-structured, outcome-oriented copy. If you do not, hybrid or full copywriting will produce better conversion results and is worth the additional investment.
Match platform to team capability
Do not choose HubSpot CMS unless you are already in the HubSpot ecosystem or have a specific need for its CRM integration. For most growth-stage SaaS companies, Webflow delivers a better ratio of marketing team independence to build cost.
For guidance on CMS choice, read our guide to WordPress vs Webflow vs HubSpot for B2B.
7. Frequently asked questions
How much does a SaaS website cost in the UK?
SaaS website projects in the UK range from £8,000 for a focused early-stage site to £100,000 and above for a comprehensive scale-stage build. Growth-stage SaaS companies typically invest between £18,000 and £40,000 for a fully custom, strategy-led site with use-case pages, pricing page, case studies, and CMS setup for marketing team independence.
What is the most significant cost variable in a SaaS website project?
Copywriting. The difference between a site where the agency provides strategic copy outlines and the client writes, versus full agency copywriting, is typically £5,000 to £11,000. The difference in conversion performance between well-crafted SaaS copy and generic feature descriptions justifies the investment for most growth-stage companies.
What is included in a SaaS website project at Rudo?
Discovery and strategy, audience persona development, sitemap and content architecture, copy outlines or full copywriting (depending on chosen tier), wireframing, visual design across all templates, CMS development and build, responsive implementation, third-party integrations, pre-launch SEO setup, QA testing, and a CMS training session.
How does the copywriting tier affect the timeline?
Strategic guidance adds no time if copy is delivered on schedule. Hybrid adds approximately one week. Full copywriting adds one to two weeks, as a dedicated copy review round is added before visual design begins.
Ready to talk about your SaaS website?
Rudo builds SaaS websites at growth stage and beyond. We are transparent about cost from the first conversation and will give you an honest scope before any project begins. Book an intro call to discuss your project and get a realistic view of what it will cost.
Find out more about our SaaS web design services.
Written by
Rudo Agency
Rudo is a strategy-led web design and development agency specialising in B2B. Based in the UK and working with clients globally, we help ambitious brands turn complex ideas into high-performing websites. Our team combines digital strategy, UX/UI design, custom development, and SEO to deliver results-focused websites that support real business growth.
