The verdict in three sentences
For a B2B software company in London, a site that generates free trials and demo requests costs 30,000 to 80,000 GBP (about 35,000 to 93,000 EUR) with a specialist SaaS agency in 2026, including the pricing page, HubSpot integration and signup tracking. The right benchmark is not page count but the visitor-to-trial conversion rate, 1 to 3 % for a well-positioned B2B SaaS. Plan 8 to 12 weeks, a third of it spent on messaging and product page structure.
What makes a B2B SaaS site convert
A B2B buyer lands on your site with a precise question: does this tool solve my problem, what does it cost, and can I try it without talking to sales? A corporate brochure answers none of the three. The elements that weigh most:
- Pages by use case and role (finance, HR, operations) rather than a single "features" page.
- Public pricing page comparing plans, per-seat or usage pricing, and billing FAQ.
- Free trial in under 60 seconds: work email, no credit card, straight into the product.
- Proof: real product screenshots, 60 to 90 second videos, logos and case studies only if they exist and are approved.
- Performance: mobile load under 2 seconds, Core Web Vitals in the green.
| Element | Indicative 2026 budget | Typical conversion effect | Priority |
|---|---|---|---|
| Architecture and messaging (workshops, wireframes) | 6,000 - 15,000 GBP | Strong, foundation for everything | High |
| 5 to 8 use case pages | 6,000 - 16,000 GBP | +20 to +40 % qualified requests | High |
| Pricing page with comparison | 2,000 - 5,000 GBP | Fewer unqualified demos | High |
| Trial flow and product integration | 3,000 - 8,000 GBP | Abandonment halved without card | High |
| HubSpot, forms, lead scoring | 2,000 - 5,000 GBP | Leads routed in under 5 min | Medium |
| Blog and SEO resources | 4,000 - 12,000 GBP | Effect at 6 - 12 months | Medium |
| Additional languages | 3,000 - 8,000 GBP | Access to EU markets | Depends on target |
These amounts are a 2026 order of magnitude for London SaaS-focused agencies, not an official rate. Freelancers and smaller studios outside London often deliver for 40 to 60 % less.
Next.js, Webflow or WordPress: the right choice
| Criterion | Next.js (headless) | Webflow | WordPress |
|---|---|---|---|
| Project cost | 45,000 - 80,000 GBP | 30,000 - 55,000 GBP | 25,000 - 50,000 GBP |
| Annual cost | 300 - 1,500 GBP hosting | 500 - 2,500 GBP licence | 600 - 2,000 GBP hosting and plugins |
| Mobile performance | Excellent | Very good | Varies by theme |
| Marketing autonomy | Good with a headless CMS | Very good | Good |
| Link with the SaaS app | Same stack, shared components | Separate | Separate |
| Timeline | 10 - 12 weeks | 8 - 10 weeks | 8 - 10 weeks |
Next.js makes sense when your product already runs on React and you want to share components, authentication and documentation pages. Webflow suits a marketing team that publishes often without developers. WordPress remains valid for a large blog. As a reference point, Kolonell websites range from 800,000 to 3,500,000 FCFA (1,220 to 5,340 EUR) depending on the plan; a full SaaS site with trial flow and HubSpot integration falls under the Premium plan or a custom quote.
Measure what matters
Set up end-to-end tracking from launch: visit, trial signup, activation (first key action in the product), conversion to paid. Without that link between site and product, you are optimizing clicks. 2026 benchmarks for B2B SaaS: 1 to 3 % of visitors start a trial, 20 to 40 % activate, 10 to 25 % of activated trials convert to paid.
Mini case study
James, CEO of a scheduling software company in London (illustrative persona), gets 6,000 visitors per month on a brochure site converting 0.5 % to trial, or 30 trials. His average subscription is 160 GBP per month.
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
- Redesign at 55,000 GBP, target 1.5 %: 90 trials per month.
- Paid conversion at 15 %: from 4.5 to 13.5 new customers per month.
- Added MRR: 9 customers x 160 GBP = 1,440 GBP of new MRR each month.
- After 12 months: about 17,300 GBP of extra cumulative MRR, or 207,000 GBP of ARR.
The redesign pays back in about 9 months, and in about 12 months even if you halve these assumptions.
FAQ
How much does a B2B SaaS website cost in London?
Budget 30,000 to 80,000 GBP with a specialist agency, depending on technology and number of use case pages. Smaller studios can deliver from 15,000 to 25,000 GBP.
Should we show our prices?
Yes in most cases: a public pricing page cuts unqualified demos and builds trust. Enterprise plans can stay "contact us" in a dedicated column.
Free trial or demo?
A no-card trial suits products usable alone in under 30 minutes. Beyond that, or for contracts above 12,000 GBP per year, a guided demo converts better; many vendors offer both.
What timeline should we plan?
Eight to 12 weeks, including 3 to 4 weeks of messaging and wireframes. Writing use case pages is often the bottleneck on the client side.
How do we handle SEO afterwards?
A blog focused on business problems and comparison pages produce results in 6 to 12 months. Kolonell SEO plans range from 100,000 to 350,000 FCFA per month (150 to 530 EUR) depending on ambition.
Let's scope your project. Tell us about your product, your target buyers and your current trial numbers, and we will price the scope, an indicative budget and an 8 to 12 week plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
