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Certain Software

Custom software for growing businesses

Less busywork.More room to grow.

We build custom apps, AI tools and automations around the way you work. By using AI to develop more efficiently, we make tailored software more affordable for small businesses.

See example applications

Start with a free 15-minute conversation. No technical brief needed.

Preliminary estimate, generally accurate to within 10–30%.

Focused projects: £3,000–£5,000 indicative build budget.

Clear scope. Agreed pricing. Ongoing costs explained upfront.

From incoming enquiry to actionable briefSee how AI can organise the details and prepare the next step for your team to review.

Priya Shah

Harbour Lane Dental

Tue 09:14

Cleaning for our practice

Hi, we're a dental practice at 14 Harbour Lane, Bristol. We need a commercial cleaning service for our ground-floor surgery, around 180 m² with three treatment rooms and a reception. Ideally weekday evenings after 6pm, five times a week, starting early next month. Could someone come and take a look?

Incoming enquiry · unstructured

Illustrative workflow · sample data

Works with the tools you already use

WhatsApp, Outlook, Microsoft Teams, Gmail, Xero, QuickBooks, Sage, Excel, SharePoint, Google Drive, HubSpot, Pipedrive, Stripe, GoCardless

WhatsAppOutlookMicrosoft TeamsGmailXeroQuickBooksSageExcelSharePointGoogle DriveHubSpotPipedriveStripegocardless

What we build

What could your business take off its plate?

Explore practical agents that handle repetitive work, connect your systems and keep things moving.

Examples of what Certain Software can build around your processes, people and systems.

Selected workflows / 6 examples

Built around your business. Not off-the-shelf software.

Better technology shouldn’t depend on the size of your business.

Software built around your business should be a realistic investment. AI helps us reduce the time and cost of development, bringing custom apps and automation within reach of smaller teams.

Start with one problem worth solving: faster quotes, smoother customer onboarding or fewer hours lost to admin. Build on it as your business grows.

Our approach

A clear path from problem to working software.

  1. 01

    Understand the problem

    We look at how the work happens today, where it slows down and what a useful improvement would achieve.

  2. 02

    Define the first release

    We agree the scope, price, responsibilities and acceptance criteria before building.

  3. 03

    Build and review

    You see working progress and give feedback against the agreed requirements.

  4. 04

    Launch and hand over

    We test the agreed workflows and make ownership, access and ongoing support clear.

  5. 05

    Improve over time

    With a support arrangement or managed service, we keep refining what we've built — adjustments and new improvements as your business changes.

About

Commercial thinking.
Hands-on building.

We're not here to build you an app. We're here to put software to work on your business problems.

Every project starts with the outcome you need — less admin, faster quoting, fewer customer follow-ups. The technology is simply how we get you there.

The outcome
is the point.

Outcome-led · built around your goals

Before we get started

Straight answers before a first conversation.

ROI calculator

What is the busywork costing you?

Two sliders, thirty seconds. See what the hours your team spends on repetitive admin could be worth each month and each year.

6 hours

£35

Potential saving

Per month
£910
Per year
£10,920

Based on 6 hours a week × £35 an hour, 52 weeks a year — about 312 hours reclaimed annually.

An illustrative estimate from the figures you enter, excluding VAT. We’ll help you put real numbers on it in a first conversation.

What would you like to take off your team’s plate?

A repetitive task. A process held together by spreadsheets. A better way for customers to work with you. Tell us what you’d like to improve.

A free 15-minute conversation to explore the problem and a sensible next step. No technical brief needed.

Preliminary estimate, generally accurate to within 10–30%.