Comparison
Custom AI vs SaaS: Which Is Right for You?
SaaS tools are convenient — until they're not. When you're paying £50,000+ per year across subscriptions and still doing manual work, it's time to consider the alternative.
Side-by-Side Comparison
| Factor | SaaS Subscriptions | Custom AI System |
|---|---|---|
| Cost model | Monthly per-seat fees forever | One-time build + low hosting |
| Year 1 cost (20 users) | £12,000–£60,000 | £8,000–£25,000 |
| Year 3 cost (20 users) | £36,000–£180,000 | £12,000–£30,000 |
| Customisation | Limited to vendor features | Built exactly for your workflows |
| Integrations | Marketplace, often extra cost | Native, unlimited connections |
| AI capabilities | Bolt-on, extra per user | Core, embedded throughout |
| Data ownership | Vendor-hosted, export limits | 100% yours, your infrastructure |
| Vendor lock-in | High — migration is painful | Zero — you own the code |
| Scaling cost | Linear increase with users | Near-zero marginal cost |
When SaaS Makes Sense
SaaS is the right choice when you're a small team (under 5 people), your needs are generic, and you don't need deep customisation. Tools like Slack, Google Workspace, and Xero are excellent SaaS products where the standardised approach works.
The problem begins when your core business operations depend on a patchwork of SaaS tools that don't talk to each other — and you're paying per user for each one.
When Custom AI Wins
You have 10+ team members — per-seat pricing makes SaaS increasingly expensive. A custom system costs the same whether you have 10 or 100 users.
You use 5+ SaaS tools — when your CRM, project management, helpdesk, reporting, and invoicing are all separate systems, a unified AI platform saves time and money.
You do repetitive work — if your team spends hours on data entry, report generation, or customer triage, AI automation eliminates that overhead entirely.
You want competitive advantage — SaaS gives every competitor the same tools. Custom AI gives you a unique operational edge that can't be copied.
Cost Comparison Over 3 Years
£108,000+
SaaS stack (20 users)
Ongoing, increasing
£18,000–£30,000
Custom AI system
Build + 3 years hosting
£70,000+
Potential savings
Over 3 years
Frequently Asked Questions
How long does it take to build a custom AI system?
Most systems are delivered in 4–8 weeks. We scope before we build, so you know the timeline upfront.
What happens if I need changes later?
You own the code. We offer ongoing support packages, or your own team can maintain it. No vendor lock-in.
Is custom AI only for large businesses?
No — we work with teams of 5–500. The ROI is strongest from about 10 users upward, but even smaller teams benefit from automation.
Can you migrate data from our existing SaaS tools?
Yes. We handle full data migration from tools like HubSpot, Salesforce, Monday.com, Zendesk, and more.