Custom SaaS & Apps · New York City

Your own software, shipped in weeks.

Custom SaaS development means building software designed around exactly how your business works, instead of bending your team around off-the-shelf tools. _1 uses AI-accelerated development — often called vibe coding — paired with senior engineering review, so New York businesses get production-grade apps, portals and internal tools at a fraction of the traditional timeline.

Starting at: $12,000
Timeline: 3–10 weeks
Based in: New York City
Ownership: 100% yours

Book a free AI audit See pricing

Outcomes

What changes for your business.

01
An MVP in front of real users in as little as 3–6 weeks
02
Software you own outright — code, data and IP
03
AI features built in from day one, not bolted on

Use cases

Custom SaaS & Apps we build in New York.

Client portals

Branded portals where your clients upload documents, track progress, pay invoices and chat with an AI assistant.

Internal tools

Replace the spreadsheet that runs your business with a fast, permissioned app your whole team can trust.

SaaS MVPs

Turn an idea or a manual service into a subscription product with billing, onboarding and analytics.

AI copilots

Embed an assistant inside your product that understands your data and helps users get things done.

What you get

Deliverables.

Fixed scope, fixed price. Here is what’s included in a typical custom saas & apps engagement.

Typical stack

Next.js
React
TypeScript
Supabase
Postgres
Stripe
Vercel
Claude Code

Product discovery workshop and clickable prototype
Full-stack web app (Next.js, React, TypeScript, Postgres)
Authentication, roles, payments and admin dashboards
AI features: search, summaries, copilots and agents
Automated testing, CI/CD and production hosting
Full source code ownership and handover documentation

Process

How we deliver.

01 · Week 1
Audit
We map your workflows, tools and data, then rank every AI opportunity by ROI and effort. Free 30-minute call; deeper paid audit optional.
02 · Week 1–2
Blueprint
A fixed-scope plan: what we build, how it connects, the guardrails, the timeline and the price. No surprises.
03 · Week 2–8
Build
We ship in weekly increments you can click, test and give feedback on. Senior engineers review every line.
04 · Go-live
Launch
Staged rollout with monitoring, human approvals where needed and hands-on training for your team.
05 · Ongoing
Optimize
We measure results, tune prompts and models, and add the next highest-value automation.

Industries

Custom SaaS & Apps by industry.

Real Estate

Instant lead response · Showing coordination

Law Firms

Intake agent · Document automation

Medical & Dental Practices

AI receptionist · No-show reduction

Restaurants & Hospitality

Reservation agent · Events pipeline

Financial Services

Onboarding automation · Document extraction

Home Services & Contractors

24/7 AI dispatcher · Quote follow-up

E-commerce & Retail

Support agent · Product content

Agencies & Professional Services

Proposal generator · Automated reporting

FAQ

Custom SaaS & Apps: common questions.

Can’t find your answer? Ask us directly — a human replies within one business day.

What is vibe coding, and is it safe for production software?

Vibe coding is building software by directing AI coding tools in natural language. On its own it can produce fragile code. _1 pairs AI-accelerated development with senior engineering review, automated tests, security checks and proper architecture, so you get the speed without the risk.

Do I own the code?

Yes. You own 100% of the source code, data and intellectual property. Everything lives in your GitHub organization and your cloud accounts.

How much does a custom web app cost in NYC?

_1’s custom apps typically start around $12,000 for a focused MVP or internal tool and range to $60,000+ for multi-role SaaS platforms with payments and AI features. Traditional NYC dev shops often quote 2–4x that for the same scope.

Available across New York

Custom SaaS & Apps for businesses in New York City, Manhattan, Brooklyn, Queens, The Bronx, Staten Island, Long Island, Westchester, Hudson Valley, Albany, Buffalo, Rochester and Syracuse.

Free AI audit · New York

Plant the first seed.

Book a free 30-minute AI audit. We’ll map the three automations that would save your team the most time — and tell you honestly if AI isn’t the answer.

Book your free audit See pricing

Fixed-scope quotes
You own the code
Reply within 1 business day