Brantum
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Product-Led Growth Agency
Your Software &
Marketing Team
on Demand

From discovery to deployment, we plug into your stack to architect, build, and grow software —
combining cutting-edge engineering with data-driven performance marketing.

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About Us
Software That Builds.
Marketing That Grows.
Available for worldwide projects
Based in London, UK
Start a Project
Trusted by 50+ startups and scale-ups across the UK & Europe — shipping from MVP to £2M ARR
Trustpilot
10+
Good software feels obvious — because the engineering is hidden.
Brantum's Lead Architect
Lead Solutions Architect

Trusted by 50+
fast-growing brands

Services
End-to-End Software
& Marketing Services

We turn complex growth challenges into production-grade solutions — combining engineering, strategy, and performance marketing under one accountable team.

Process
From Brief
to Production

Discover & Scope

Align on problems, tech stack reality, and growth metrics. Output: opportunity brief, KPI model, phased roadmap, and effort/cost ranges.

3–7 DAYS
01/03

Build & Launch

Architect, build, and ship — with marketing instrumentation baked in from sprint one. Output: live product, tracking live, first campaign running.

2–8 WEEKS
02/03

Optimise & Scale

Prove performance, iterate on what works, and activate the growth flywheel. Output: CRO wins, PLG loops, and compounding organic and paid growth.

ONGOING
03/03
Benefits
Why Choose Us
Speed
Quality
Security
ROI
Outcome Over Output

We measure what matters — shipped features, revenue generated, leads acquired, and CAC reduced — so every sprint delivers business value, not just lines of code.

Eval-First Delivery

From day one we run sprint reviews, performance benchmarks, and conversion tracking. You see exactly how the work is performing — and why.

Secure by Design

GDPR-compliant data handling, encrypted pipelines, audit trails, and SOC 2-ready infrastructure — built in from sprint one, not bolted on after launch.

Design-Led Product Experiences

We craft interfaces, onboarding flows, and PLG mechanics that feel intuitive — so adoption rises and support overhead falls.

Features
All Capabilities in One Agency
Full-Stack Engineering

Custom web apps, SaaS platforms, APIs, and cloud infrastructure — built with production-grade code and zero vendor lock-in.

Performance Marketing

Data-driven paid media across Google, Meta, LinkedIn, and TikTok — with attribution that works because we built the tracking too.

AI-Powered SEO & GEO

Rank on Google and get cited by ChatGPT and Perplexity. We optimise for both the blue links and the AI answer box.

Brantum
PLG Growth Loops

Product-Led Growth mechanics baked into your software — viral loops, referral engines, in-product onboarding, and activation flows.

Marketing Automation

HubSpot to complex multi-channel workflows. Lead nurturing, lifecycle marketing, and CRM integration — all joined up.

Seamless Integrations

Connect your CRM, analytics, ad platforms, and data warehouse with webhooks and APIs so insights become actions, fast.

Tools
We Work With
Powerful Tech Stacks
We design, build, and scale with a modern full-stack — React, Node.js, Python, AWS, HubSpot, and best-in-class AI tools — so your product is fast, reliable, and market-ready.
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Team Members
The Team Building
& Growing Your Product
Alex T.
Lead Solutions Architect
Jamie R.
Head of Performance Marketing
Sam K.
Head of SEO & GEO
Jordan M.
Head of Product & PLG
Morgan L.
DevOps & Cloud Lead
Statistic
Software That
Builds. Marketing
That Grows.
Brantum shipped our platform and ran our paid campaigns simultaneously. We hit £2M ARR in 18 months — that never would have happened with two separate agencies.
PRODUCTS & BRANDS SCALED
50K
CLIENT RETENTION RATE
94%
CLIENT REVENUE GENERATED
12M+
Awards
Best Software & Marketing Agency
B2B SaaS PLG Execution
/ 2025
Top Performance Marketing Agency
Google Ads Excellence Award
/ 2025
Clutch Top Agency UK
Custom Software Development
/ 2024
Google Premier Partner
Search & Performance Excellence
/ 2024
Testimonials
What Our
Clients Say
Brantum is the only agency we've found that truly understands both sides. Our engineers love working with them because they speak tech. Our CMO loves them because they drive results.
Sarah K.
CTO, Series A SaaS Startup
We hired three agencies before Brantum. What took six months of back-and-forth between dev and marketing now gets done in six weeks by one team who actually communicates.
James T.
Founder, B2B Platform
Page 5 to position 1 for our core keywords in 4 months. Even more impressive — they shipped our entire v2 product at the same time. One team doing both is a genuine superpower.
Alex R.
CEO, FinTech Startup
Pricing Plans
From pilot to scale —
clear scope, transparent
costs.  annually.
Growth Sprint
For startups & MVPs
£9,900
/ fixed project
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What's included
Prove value fast — software scoped, built, and launched with tracking and your first marketing campaign live.
  • Discovery workshop & roadmap
  • MVP build (up to 8 weeks)
  • Analytics & attribution setup
  • 1 paid channel launch
Scale Retainer
For growing companies
£19,900
/ month
Get Started
What's included
Full-service embedded team — engineering, marketing, and SEO working from one shared roadmap to compound your growth.
  • Everything in Growth Sprint
  • Ongoing development sprints
  • Full performance marketing management
  • SEO, GEO & content strategy
FAQs
Frequently Asked
Questions
Most agencies do either software or marketing. Brantum does both under one roof, with one team and one shared roadmap. That means your software is built with growth mechanics from sprint one — analytics, attribution, and PLG loops — not bolted on later by a separate agency that doesn't understand your codebase.
Our Growth Sprint takes 8–10 weeks from signed brief to live product with active campaigns. We always start with a paid Discovery Sprint (3–7 days) to scope accurately and lock the roadmap before committing to a full build cost — no surprises.
Custom software typically ranges from £25,000 to £100,000+ depending on scope and complexity. Our Discovery Sprint at £5,000 scopes your project accurately before any full build commitment. We always provide a clear, itemised proposal before work begins.
Both. Around 60% of our clients are funded startups (Seed to Series B) who need to build and grow fast. The rest are established software companies looking to modernise, scale, or launch a new product line. Our retainer model suits established companies; project sprints suit startups.
Contact
Let's Build
Something That Grows
E-mail address
[email protected]
Phone number
+44 (0) 20 7946 0958

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