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We build AI agents, automations and SaaS products.

From one job you're tired of doing by hand to a whole product. We've launched our own, so we know what it takes to ship yours.

Book a call See what we've built

Here to meet people, share your story or find work? Join the Interstack community, free

AI agent · Lead to invoice
Waiting · example workflow
  1. New lead from your website form Jane, Acme Ltd
  2. Qualified by AI agent Budget and timeline match
  3. Added to your CRM Deal created, owner assigned
  4. Invoice sent with Stripe £2,400, due in 14 days
  5. Recorded in your accounting Matched and reconciled
  • 10+ years building software
  • Makers of OnCuePay, Interstack Stories and VisaPath
  • One team from scoping to launch
  • Clients worldwide

Who we build for

  • Clinics and care
  • Salons and beauty
  • Restaurants and venues
  • Trades and field teams
  • Shops and online stores
  • Schools and charities
  • Events and entertainment
  • Agencies and consultants
  • Property and lettings
  • Founders with an idea

No tech knowledge needed. Tell us what eats up your week and we'll say honestly what can take it off your hands.

What we build

From a single automation to a complete product, built and looked after by one team.

AI agents

Agents that answer customers, qualify leads and handle support, using your own tools and data.

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AI automation

Documents, emails, data entry and reports: the repetitive work, done for you.

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Payments and business systems

Stripe, PayPal, Klarna, Revolut Pay and more, connected to your CRM, invoicing and accounting.

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SaaS from scratch

From first chat to a launched product with paying customers.

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Web and mobile apps

Web apps, iOS and Android apps, APIs and internal tools.

Field and compliance apps

Inspections, audit trails, automatic reports and client portals.

Support and maintenance

Already have software? We take it over, keep it secure and keep improving it on a monthly plan.

Talk to us

For the technical folks: tools we work with

Payments

  • Stripe
  • PayPal
  • Klarna
  • Revolut Pay
  • Paystack
  • Flutterwave

Integrations

  • n8n
  • Google Maps
  • WhatsApp
  • SMS
  • Email

AI and agents

  • Claude
  • OpenAI
  • Groq
  • MCP
  • Prism
  • Jupyter Notebook

Frontend

  • Vue.js
  • React
  • TypeScript
  • Storybook

Backend

  • Laravel
  • Node.js
  • Python
  • FastAPI
  • Flask

SQL and NoSQL

  • MySQL
  • PostgreSQL
  • MongoDB
  • Redis

Infrastructure

  • AWS
  • Google Cloud
  • Laravel Forge
  • GitHub

Testing and quality

  • Playwright
  • Vitest
  • Pest
  • PHPUnit
  • Behat
  • Accessibility (WCAG)

We don't just build for clients. We launch our own.

Designed, built and run by us. Clients get the same team and standards.

OnCuePay

Get paid on cue.

DJs and live hosts get paid for song requests and shoutouts. Guests scan a QR code, no app, and are only charged once the request is played.

What we built: held card payments, payouts to hosts, a live request queue and dispute protection.

Visit oncuepay.com

Interstack Stories

Real stories from people with a craft.

A free community to share career stories, build a profile, message people and find jobs.

What we built: video and written stories, real-time messaging and video calls, a job board, and AI profile drafts from a CV.

Explore Stories

VisaPath

UK immigration, in plain English.

Launching soon

A free guide to every main UK visa route through to citizenship, with rule changes in plain English and countdowns to your key dates.

What we built: a visa route explorer, side-by-side comparisons, settlement timelines and visa-free travel by passport.

Visit VisaPath
See how we built them

From Interstack Pulse

What members are talking about

The news and tips worth your time this week, and a question to get you thinking.

Join Interstack

A free home for people with a craft

Nurses, chefs, teachers, designers, founders and everyone in between. One free account, every feature, no card.

Create your free account How it works

A profile in minutes

Upload your CV and we draft your profile for you. Edit anything you like.

Share your story

How you got here, on video or in writing. Live straight away.

Find people worth knowing

Search by skill, role or place, and read their story first.

Message anyone

Chat, then jump on a video call when you are ready.

Post or apply for jobs

Hiring or looking, the job board is open to every member.

You stay in control

Choose who can find you and whether your contact details are shared.

How we work

From idea to launch, without the guesswork

Start with a discovery call
  1. 01

    Discovery call

    We learn your goal and tell you honestly if software or AI is the answer.

  2. 02

    Scope and quote

    A clear plan, timeline and fixed price before work starts.

  3. 03

    Build in weekly releases

    Working software every week, not a big reveal at the end.

  4. 04

    Launch

    We handle hosting, payments and everything else to go live.

  5. 05

    Support and maintenance

    A monthly plan to monitor, fix and improve. Or hand it all to your team.

Questions

The ones we get most often.

I'm not technical. Can you still help?

Yes, most people we talk to aren't. Tell us how your business runs and what keeps going wrong. We explain the options in plain English, recommend the simplest one, and do the technical parts.

What could you build for a business like mine?

Online booking and deposits so no-shows stop costing you. A WhatsApp assistant that answers the same questions every day. Job sheets your team fills in on their phones. Automatic invoices and reminders. If you do it by hand every week, it's worth a chat.

What kinds of AI agents can you build?

Agents that answer customers, follow up leads, handle support, summarise documents and run research. If a task follows rules and uses information you already have, an agent can probably help.

Can you really build my whole SaaS company?

Yes. Design, development, payments, hosting and launch. You bring the idea and know your customers. We've done it for our own products, OnCuePay and Interstack Stories.

How much does a project cost?

There's no price list. After a short discovery call you get a fixed quote and timeline before any work starts.

Show 8 more questions
How long does it take?

Simple automations can be ready in weeks. A complete SaaS product usually takes a few months. You'll see progress every week.

Who will actually build my project?

A founder with over ten years building software. The person who scopes your project stays on it until it's live.

What kinds of products can you build?

Booking platforms, marketplaces, split-payment apps, online stores, inspection tools, client portals and AI products. If it needs accounts, payments and a team to run it, we can build it.

Which payment providers do you work with?

Stripe, PayPal, Revolut Pay, Klarna, Paystack, Flutterwave and others. One-off payments, subscriptions, deposits, split bills, payouts to sellers and buy now, pay later.

Can you connect our existing tools?

Yes. Lead forms, CRMs, invoicing and accounting, so data flows between them on its own. If your team copies data between systems, we can usually remove that job.

Do you build mobile apps?

Yes. iOS and Android apps, on their own or alongside a web product.

Can you take over software someone else built?

Yes. We review the code, tell you honestly what state it's in, then maintain and improve it on a monthly plan.

Do you work with clients outside the UK?

Yes. We're based in London and work with clients worldwide, remotely.

Still wondering something? Ask us

Tell us what you want built

One automation or a whole product, we'll reply as soon as we can.

Send us a message

Prefer to talk?

Book a free 30-minute call and we'll talk through your idea.

Book a call
hello@interstack.net

Projects, partnerships and general enquiries

London, UK

Working with clients worldwide

Interstack

Interstack Stories