SFDIFYCustom software development for Chicago businesses.
SFDIFY is a custom software development company based in Naperville, in Chicago's western suburbs. We build AI products, SaaS platforms, custom web applications, mobile apps, custom CRMs and Salesforce implementations for businesses across the Chicago area, in your time zone.
What we build for Chicago companies.
AI development
Generative AI features, document automation and assistants built into your product or workflow.
Learn moreAI chatbots and agents
Bots that answer, qualify leads and hand off, on your site, Instagram or Salesforce.
Learn moreSaaS platforms
Multi-tenant products with billing, roles and analytics, from a studio that runs its own SaaS.
Learn moreCustom web applications
Customer portals, dashboards and internal tools that replace spreadsheets and manual steps, built for daily use.
Mobile apps
iPhone and Android apps for customers and field teams, including Flutter, from prototype to the app stores.
Learn moreCustom CRM and Salesforce
Custom CRMs and Salesforce implementations from a Salesforce Consulting Partner.
Learn moreSoftware for Chicago's industries.
Logistics and trucking
Chicago is one of the busiest freight hubs in the country. We build and run Yolda, an AI-native TMS for trucking companies, and built the website for PST Global, a carrier based in Naperville.
Learn moreFinancial services and tax
We built the secure client portal and nine-language mobile app behind USTAXX, an IRS-authorized e-file practice.
Learn moreB2B sales and professional services
Custom CRMs, Salesforce implementations and GTM engineering with Clay and outbound automation for teams that sell to other businesses.
Learn moreConsumer apps and local marketing
Our own products include MyCheck, a checklist app in 13 languages; CostRefund, which alerts Costco shoppers to price drops; Segeo, which publishes a blog post to a business's site every day; and MuChat, which automates Instagram comments and DMs.
Learn moreBased in Naperville, working across Chicagoland.
SFDIFY is based in Naperville, about 30 miles west of downtown Chicago. We work with companies in the city and across the western and northwestern suburbs, and with companies elsewhere in the US over video. Chicago-area clients get a team in their own time zone, a short drive away.
How to choose a software development company in Chicago.
- They have shipped software like yours and still run it. Ask to see it live, not only a portfolio slide.
- You meet the people who will build it, not only a salesperson.
- They write down what a first version includes before you sign a long contract.
- They tell you when an off-the-shelf tool would do the job, instead of building everything custom.
- You own the code, the accounts and the data when the project ends.
- Their time zone and availability fit how your team works.
From first call to launch.
Free first consultation
Tell us what you are building and where it is stuck.
Plan
A first version, a timeline and the team that will build it.
Build
Working software every week or two, reviewed with you as it grows.
Launch and grow
Ship to real users and improve from what they do.
Work close to home.
PST Global
The website for an asset-based carrier in Naperville, Illinois: capabilities, safety, driver hiring and a lane quote form that goes straight to dispatch.
Visit siteYolda
The AI-native TMS for trucking. Its AI reads rate confirmations into loads, watches every CDL and medical-card date, and answers questions about your numbers.
Learn moreUSTAXX
The portal and app behind an IRS-authorized e-file practice. Clients ask USTAXX AI, track deadlines and follow their return in nine languages.
Learn moreQuestions, answered.
Where is SFDIFY located?
SFDIFY is based in Naperville, Illinois, about 30 miles west of downtown Chicago, and works in Central time.
What is custom software development?
Custom software development is designing and building software for one business's own workflow, such as a customer portal, an internal tool, a mobile app or a CRM, instead of adapting an off-the-shelf product.
How much does custom software development cost in Chicago?
It depends on what you are building: the number of users and roles, the integrations, and whether you need web, mobile or both. Our guide to what drives software development cost walks through the main factors, and the first consultation is free.
What kind of software do you build for Chicago businesses?
AI products and features, SaaS platforms, mobile and web apps, websites, custom CRMs and Salesforce implementations.
Why choose a local software development company?
Same time zone, easier communication and a team that knows the regional market. Our guide to local versus national software development firms covers the trade-offs.
Do you only work with Chicago companies?
No. We work with businesses across the US, but Chicago-area companies get a team a short drive away.
How do we start?
Book a free first consultation. Projects typically start 2 to 4 weeks after the first call.
Further reading.
Chicago Software Development: Local vs. National
Compare a local Chicago software development company with a national agency on communication, cost and talent, and learn how to check a firm is local.
Learn moreWhat Really Drives Software Development Cost in 2026
Software development cost is driven by scope, platform choice, integrations, team experience, and post-launch work—not a flat number.
Learn moreCustom Software vs Off-the-Shelf Solutions: When Does Building Your Own Pay Off?
Custom software vs off-the-shelf: compare upfront and ongoing costs, ownership, and fit, and learn the signs your business has outgrown standard tools.
Learn more