Custom Software Development in Marietta, GA
Marietta and the broader Cobb County market — Kennesaw, Smyrna, Vinings, and the corridor along I-75 and I-285 northwest of Atlanta — concentrates a deep mid-market base: contractors, field service operators, healthcare-adjacent firms, and defense suppliers around Dobbins ARB. Software needs cluster around estimating, scheduling, dispatch, and QuickBooks-synced operations.
Why Marietta businesses partner with QUANT LAB
Cobb County mid-market operators want software that fits how they actually run — not a generic SaaS suite that forces a workflow change. QUANT LAB delivers exactly that. William Beltz scopes, builds, and ships every project personally. No offshore handoff, no junior outsourcing, no agency markup layer. Most Marietta engagements close on fixed-scope, fixed-price proposals with weekly Friday demos and a written acceptance milestone.
Our Bridgepointe Painting case study — a luxury contractor across Cobb, Roswell, Sandy Springs, and Buckhead — runs on a bespoke platform with deep QuickBooks Online sync covering customers, vendors, items, and chart-of-accounts. Bookkeeping reconciliation time dropped meaningfully because the file no longer requires manual entry from spreadsheets. That same QBO-aware build pattern fits most Cobb County operators we talk to. Healthcare-adjacent and defense-supplier clients add SOC 2 or CMMC-mapped pen testing on top.
What we build for Marietta clients
Contractor & Field Service Platforms
Mobile-first estimate flows, automated PDF proposals, scheduling, and admin portals for Cobb County contractors and field service operators.
QuickBooks-Synced Ops Platforms
Deep QuickBooks Online integration covering customers, vendors, items, and chart-of-accounts. Bookkeeping reconciliation without spreadsheet manual entry.
Custom CRMs for Mid-Market Cobb Operators
Replace HubSpot/Salesforce stacks with platforms you own. Lead-to-revenue plumbing without per-seat creep.
Penetration Testing
Web app, network, and AD engagements for Marietta-area SaaS, healthcare-adjacent, and defense-contractor suppliers.
How we work with Marietta teams
We are Macon-based and drive up to Cobb County for on-site engagements as scope warrants — Marietta is about two hours via I-75 and I-285. Most kickoffs run as a video call followed by a single on-site afternoon to walk the workflow we're replacing. From there, builds run weekly: every Friday you get a deployed staging URL, written change notes, and the next-week plan. Marietta engagements close on fixed-scope proposals — no open-ended T&M billing surprises.
FAQ
Do you cover Cobb County more broadly than just Marietta?
Yes — Marietta, Kennesaw, Smyrna, Vinings, and the broader Cobb County operator base. Our Bridgepointe Painting case study spans Cobb, Roswell, Sandy Springs, and Buckhead.
What sectors are strongest in the Marietta market?
Cobb County skews heavy contracting, field services, healthcare-adjacent operators, defense suppliers around Dobbins ARB, and mid-market service businesses. Each has consistent custom software needs around estimating, scheduling, and dispatch.
Can you meet at a Marietta or Cobb County office?
Yes. We drive up from Macon — Marietta is roughly two hours via I-75 and I-285. For engagements above ~$25k we plan one or two on-site sessions at your office.
Are you familiar with QuickBooks-heavy operators?
Yes — Cobb County mid-market operators run heavily on QuickBooks Online. Our Bridgepointe Painting build covers deep QBO sync — customers, vendors, items, and chart-of-accounts — so bookkeeping reconciliation runs without manual spreadsheet entry.
What is the typical Marietta engagement timeline?
Most Marietta MVPs ship in 8–12 weeks against a fixed-scope quote. Full builds run 3–6 months and close at written acceptance.
Do you offer ongoing maintenance after launch?
Yes — monthly retainers for hosting, security patching, and small feature work. Or take the codebase fully in-house. No lock-in.
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Full Atlanta-metro coverage page.
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Wealth, RIA, and corporate HQ corridor.
Midtown Atlanta
Tech Square and Georgia Tech corridor.
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North metro fintech and SaaS.
Custom Business Software
Ops platforms built around your workflow.
Custom CRM Development
Own your CRM. No per-seat creep.
Penetration Testing
Web, network, AD engagements.
Payments & Licensing
Stripe and ACH-grade billing.
Case Study: Bridgepointe Painting
Cobb-area QBO-synced ops platform.
Case Study: Estimating Engine
Contractor estimate-to-proposal automation.
Pricing
Fixed-quote ranges by project type.
Start a Project
Scoping calls and fixed-quote proposals.