Web Applications · Billings, Montana

Custom Web Application Development in Billings, MT

Agency 220 builds custom web applications — interactive software tools accessed through a browser — for Billings and Montana businesses. Dashboards, customer portals, booking systems, inventory managers, multi-tenant SaaS platforms, and internal tools, built on React and TypeScript and accelerated with modern AI dev workflows.

How a Web App Is Different from a Website

A standard website displays information. A web application lets users interact with data, complete tasks, and run workflows — log in, manage records, place orders, generate reports, integrate with third-party systems. Most Billings businesses we work with already know they need a custom app because the off-the-shelf SaaS doesn't fit their process.

Tech Stack

React, TypeScript, and modern API frameworks for the front end and back end. Cloud hosting on AWS, Cloudflare, or your preferred provider. Postgres or your existing database. We pair this with AI-assisted dev tooling (Cursor, GitHub Copilot, Claude Code) so we can ship faster and at lower cost than traditional agencies running purely human workflows.

Common Integrations

Stripe, QuickBooks, Salesforce, HubSpot, Twilio, Mailchimp, Google Workspace, Microsoft 365, custom REST and GraphQL APIs, and any third-party tool with public documentation. If your Billings business runs on a system, your custom app can connect to it.

Process & Timelines

Discovery and planning (week 1–2): we map your business processes, define user roles, and architect the application. UI/UX design (week 2–4): clickable prototypes you can test before a single line of code is written. Development and testing (varies by scope): two-week agile sprints with regular demos. Launch and support: staged rollout, user training, and an ongoing support relationship.

Most custom apps ship in 2–6 months depending on scope. Every project includes a clear timeline and a fixed-quote estimate. Post-launch monthly maintenance plans keep your app updated, secure, and running.

Have a custom-app idea? Call (406) 656-0608 for a free scoping call.

Contact Agency 220

Phone: (406) 656-0608

Email: hello@agency220.com

Address: 2220 Grant Rd. Ste 102, Billings, MT 59102

Hours: Monday–Friday, 9:00 AM – 5:00 PM (Mountain Time)