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Quartzle

AI-first software studio

We build AI agents, voice bots and SaaS products that actually ship.

Senior, hands-on engineering for startups and growing businesses. We take you from idea to a working product in weeks, then keep it fast, reliable and affordable to run.

Products we have built for

  • PropTexx
  • Invite Ellie
  • CommissionIt
  • Conventro
  • Trading with Mohamad

120+

AI and SaaS products designed and shipped

8+ yrs

building full-stack and AI systems

2–6 wks

typical time from kickoff to working MVP

How we work

A clear process, no surprises.

Fixed quotes, weekly demos and code you own. You always know what is being built, what it costs and when it ships.

  1. 0130 min

    Discovery call

    We talk through your idea, users and constraints, then send a written scope with timeline and a fixed quote within 48 hours.

  2. 022–6 weeks

    Design & build

    Weekly demos on a live staging link. You see real progress every Friday, not a status report.

  3. 031 week

    Launch

    Production deploy on AWS, DigitalOcean or Vercel, with monitoring, docs and a handover call for your team.

  4. 04Ongoing

    Support & scale

    Optional monthly retainer for new features, model upgrades, cost tuning and performance work.

The tools we ship with every week

  • OpenAI
  • Claude
  • LiveKit
  • ElevenLabs
  • Twilio
  • Next.js
  • React
  • Node.js
  • Python
  • Stripe
  • MongoDB
  • Electron
  • AWS
  • DigitalOcean
  • Tailwind CSS
  • Prisma

FAQ

Questions we hear on most calls.

Something else on your mind? Email us.

Projects & pricing

AI chatbots and agents, real-time voice agents, automation bots, SaaS MVPs, websites, web apps, iOS and Android apps, Chrome extensions and desktop apps. If it involves an LLM, an API or a dashboard, it is probably a fit.

Most MVPs go from kickoff to a working product in 2–6 weeks, plus about a week to launch. Larger platforms are split into milestones, and the written scope we send after the discovery call shows the timeline for each one.

Cost depends on scope: the number of features, integrations, platforms and how much AI work is involved. After a short discovery call we send a written scope with a fixed quote, so there are no surprise invoices.

New products are usually a fixed-scope, fixed-price project. After launch you can move to an optional monthly retainer for new features, model upgrades and performance work, or we can work inside your existing team.

Ownership, security & support

You do. The full source code lives in your own GitHub repository and every cloud account is in your name from day one, so you are never locked in to us.

We work inside your own accounts with the minimum access we need, keep secrets out of the code, and follow the privacy rules that apply to your data. We are happy to sign an NDA before you share anything sensitive.

Yes. We regularly join existing React, Next.js, Node.js and Python codebases, fix what is slowing you down and ship features alongside your developers.

We deploy to production with monitoring, documentation and a handover call. From there you can run it yourselves or keep us on a monthly retainer for support, fixes and new features.

AI & technology

Often, but not always. On the discovery call we look at the task, your data and the cost per use. If a simpler rule-based solution or an off-the-shelf tool would do the job better, we will tell you.

We ground answers in your own content (RAG), limit what the agent is allowed to do, add checks and a human hand-off for sensitive steps, and test against real questions before and after launch.

OpenAI, Anthropic Claude, Google Gemini and open-source models. We pick the model per task based on quality, latency and cost, and keep your app free to switch later.

We build with React Native and Expo, so one codebase runs on both iOS and Android with a native feel. That keeps cost and time down, and we handle App Store and Google Play submission.

Working together

Yes. Many of our projects are first versions of a product. We help you cut the scope to what matters for launch, so you can get real users and feedback quickly.

We are based in London and work on UK time, which overlaps with EU business hours and US mornings. Async updates go out daily.

Have a project in mind?

Tell us what you want to build. You will get a written scope, timeline and fixed quote within 48 hours, whether or not we end up working together.