Back to home For founders and agencies

Your idea, built properly.

No technical co-founder, or agency quotes far too big for a first version? Start with a clickable prototype in a week, then a focused first version you own outright. Agencies can hand us the builds they don't do in-house, under their own brand.

The usual starting point

From idea to first users.

Most founders and agencies come to us with one of these. Here is how we would get you to a first version.

Capabilities

The systems you run on, built properly.

One builder from first sketch to launch. No handoffs between strangers, no surprises on the invoice.

01 · Systems

Business systems that hold it all together

Booking, records, inventory, payments and reporting in one place, built around how your team actually works. Hover a stone.

  • Bookings
  • CRM
  • Inventory
  • Dashboards
02 · Web

Web apps and portals

Fast, secure apps in any browser, with customer and staff logins.

  • Next.js
  • Roles
  • Portals
03 · Integrations

Connect your tools

Make the software you already pay for talk to each other.

  • Xero
  • Shopify
  • Stripe
  • PayNow
04 · Automation

Automation and AI

Reminders, reports, invoices and enquiry routing that run themselves.

  • WhatsApp
  • Reports
  • LLM assistants
05 · Product

MVPs for founders

A clickable prototype in a week, then a focused first version.

  • Prototypes
  • MVPs
  • Handover
06 · Care

Hosting, backups and support after launch

Monitoring, daily backups, fixes and small improvements every month, so your system keeps getting better.

S$150 / month from
Tools and stack

Mainstream tools, zero lock-in.

Well-supported technology any good developer can maintain, so your system outlives any one vendor.

Frontend

Interfaces that feel instant

4 tools
ReactUI library
Next.jsWeb framework
TypeScriptTyped code
TailwindStyling

Backend and data

Secure records and logic

5 tools
Node.jsAPIs
PythonData and AI
PostgreSQLDatabase
SupabaseAuth and DB
FirebaseRealtime

Mobile

Apps for staff and customers

3 tools
React NativeiOS and Android
FlutterCross-platform
PWAInstallable web

Integrations

Your existing tools, connected

6 tools
WhatsAppMessaging
XeroAccounting
ShopifyCommerce
StripePayments
PayNowSG payments
WorkspaceSheets and Gmail

Automation and AI

Admin that runs itself

5 tools
n8nWorkflows
MakeAutomation
ZapierAutomation
OpenAILLM APIs
ClaudeLLM APIs

Delivery

Shipped and kept running

5 tools
AWSSG region
VercelHosting
DockerContainers
GitHubCode and CI
FigmaDesign
Pricing

Fixed prices. In writing.

Every engagement starts with a one-page scope listing what is and isn't included. The price you sign is the price you pay.

S$500Discovery Sprint, from · 1 week, credited to your build
S$1,500Automation Quick Win, from · 1 to 2 weeks
S$4,200Business System Build, from · founding rate S$3,200
S$150Care Plan, from · per month after launch
S$15,000Custom Platform, from · 10 to 16 weeks, for bigger builds like VSMS · See what's included
Full pricing, the estimator and how a build runsEvery package, a 30-second price estimate and the week-by-week plan.
Ask Keystone

What would you like to know?

The questions founders and agencies ask most, answered straight. Tap a suggestion or type your own.

Prototypes, MVPs and pricingOwnership and handoverAgency and white-label work

Answers are written by Aarya, not generated. Anything else goes straight to the contact form.

Aarya · Keystone Devs● Online · replies within a day
Pre-written answers

Popular questions

Start a project

Tell us what you'd like to build.

Answer a few questions, about two minutes. We research your setup before we call. If software isn't the answer, we'll say so.

  1. 2 minutesYou send the brief

    Your business, the problem and what a good result looks like.

  2. Same dayWe do the homework

    We study how businesses like yours run and sketch a first approach.

  3. Within 24 hoursA 15-minute call

    Ideas, a rough price and next steps. No obligation.

  4. After the callFixed quote in writing

    A one-page scope with the price you will pay.

Book a free 15-min call
Prefer to message? aarya@keystone-devs.com Singapore · on-site visits island-wide