A Teaneck, NJ team that designs, builds, launches, and supports SaaS products: multi-tenant architecture, sign-in, PostgreSQL, Stripe subscriptions, an admin dashboard, and the marketing site in front of it. Fixed-price builds from $25,000, a Blueprint from $2,500, and the code in your name.
Updated · Reviewed by the AppDesign360 engineering team
AppDesign360 (Mango Consulting LLC) is a SaaS development company based in Teaneck, New Jersey, with headquarters in Queens, NY. We design, build, and support subscription software for founders and businesses in Bergen County, across New Jersey, in New York City, and nationwide. A first version with sign-in, a PostgreSQL database, Stripe billing, and an admin dashboard costs $25,000–$45,000 and launches in 8–10 weeks; larger products run to $120,000 or more over 16 weeks. Every price is fixed in writing after a free 20-minute scoping call, and support continues after launch on a retainer or from $25 per hour.
A SaaS product earns its first dollar when a stranger can sign up, pay, and get value without anyone on your team touching a keyboard. Everything in a first build should serve that moment. We scope the one workflow a customer will pay for, build it completely, and launch it on a date you can plan around.
We have built that path end to end. TourSyncer, TraderCongress, and ResumeFlight are SaaS products in production that we designed and engineered: multi-workspace architecture, authentication, PostgreSQL, Stripe billing, data pipelines, AI workflows, admin portals, and the marketing sites in front of them. You can open all three today.
Mango Consulting LLC is the legal entity, an SBA-certified Service-Disabled Veteran-Owned Small Business founded in 2018, based in Teaneck, NJ with headquarters in Queens, NY. AppDesign360 is the brand we use for SaaS, web, and app work. We work with New Jersey founders in person by appointment and with clients across the United States by video call.
All-in-one tour operator platform with real-time bookings, dynamic-pricing itineraries, invoicing, staff scheduling, and a built-in CRM.
Real-time dashboard tracking congressional stock trades, SEC insider filings, and federal contracts.
AI resume and cover-letter platform built to get applicants past applicant tracking systems.
A SaaS quote covers far more than screens. These are the ten parts of a production SaaS product, and every one of them is in our scope. When you compare proposals, check each line: whatever is missing will be billed later, usually at a worse rate.
We cut the idea down to the one workflow a customer will pay for, map every screen in that flow, and write down what is out of scope for version one.
A clickable prototype you can put in front of real customers before any code is written, then a component library so every new screen looks like it belongs.
Each customer's data is isolated at the database level with workspaces, roles, and permissions, so one account can never read another's records.
Email and password, Google or Microsoft sign-in, team invitations, password resets, and two-factor authentication where your customers expect it.
A PostgreSQL schema with migrations, backups, and indexes planned for growth, plus REST or GraphQL APIs your own team or partners can build on.
Stripe plans, free trials, upgrades and downgrades, proration, failed-payment retries, invoices, tax settings, and a self-service billing portal.
An internal dashboard to look up accounts, fix problems, issue refunds, and see revenue without asking a developer to run a query.
Email and SMS, calendars, webhooks, data imports, third-party APIs, and language-model features with usage limits so costs stay predictable.
Staging and production environments, automated deployments, encrypted secrets, rate limiting, security headers, error tracking, and uptime monitoring.
The public website, pricing page, sign-up flow, and first-run experience, built with the search and AI visibility setup that gets you found.
These are the habits that separate a product that survives its first thousand users from one that needs a rewrite. They are part of every build, not upsells.
These are the ranges most projects land in, not quotes. Every price is fixed after a free 20-minute scoping call and a written scope, and billed in milestones tied to deliverables. Hosting, Stripe fees, and third-party services are billed by the providers to your own accounts. If you are building the product yourself with AI tools, Vibe Coding Support starts at $125 per session.
Launch is the start of the work. A SaaS product needs care every month: frameworks and databases release security patches, Stripe and other providers change their APIs, customers find edge cases, and the roadmap keeps moving. We stay on as the engineering team behind the product for as long as you want us.
Every build includes 30 days of fixes at no charge. After that you choose a monthly retainer or hourly support at our custom software rate, from $25 per hour. There is no lock-in: the code and accounts are yours, and the documentation is written so another team could take over.
Uptime checks, error tracking, and alerts, with fixes shipped through the same staging and deployment pipeline as the original build.
Framework, library, and database patches applied on a schedule, plus key rotation and access reviews.
Copy edits, form changes, new report columns, and the edge cases real customers uncover.
Your phase-two list, scoped and priced feature by feature, delivered in two-week cycles with a demo at the end of each.
Query tuning, caching, background jobs, and infrastructure sizing as usage grows, so the hosting bill tracks revenue.
Plan and price changes, coupons, tax settings, refunds, and the admin tools your support team asks for.
Scheduling, itineraries, invoicing, and staff management for service businesses, like TourSyncer for tour operators.
Dashboards over public or proprietary data with pipelines, alerts, and fast search, like TraderCongress.
Document, writing, and matching products built on language models, like ResumeFlight.
Two-sided platforms with listings, messaging, and payments, like the Hollow Purple B2B marketplace.
Client portals, intake, and secure messaging with HIPAA-aware data handling and BAA-ready vendors.
The spreadsheet or back-office system your company runs on, rebuilt so other companies can subscribe to it.
| AppDesign360 fixed-price build | AI or no-code builder | Freelancer | In-house hire | |
|---|---|---|---|---|
| Cost of a first version | $25,000 – $45,000, fixed | Low monthly fees plus your own time | Usually hourly; total unknown | A salary before anything ships |
| Time to paying customers | 8–10 weeks | Days to a demo; production gaps remain | Depends on one person's availability | Months, after recruiting |
| Billing, security, multi-tenancy | In scope and tested | Often the missing 30 percent | Depends on the individual | Depends on the hire |
| Who owns the code | You, from day one | Often tied to the platform | You, if the contract says so | You |
| Coverage | Design, front end, back end, infrastructure | You | One person; a vacation stalls the launch | One role per hire |
| Best for | A product customers can pay for, on a date | Testing an idea before spending | Small, well-defined additions | Products with revenue to fund a team |
We are based in Teaneck and work with founders and businesses across Bergen County and the rest of New Jersey. Most of the work happens over video calls and a shared staging link. When a whiteboard session helps, we meet in person by appointment in Teaneck, Hackensack, Paramus, Fort Lee, Englewood, and the towns around them.
New Jersey is a practical place to start a software company. The state's economy runs on industries that buy software: healthcare and life sciences, logistics and distribution, financial and professional services, and thousands of small businesses that still run on spreadsheets. New York City's customers and investors are a bridge away, without Manhattan rent in your costs.
Building in New York City? See our SaaS development page for NYC startups.
The Division of Taxation's Technical Bulletin TB-72 treats software accessed in the cloud as non-taxable in most cases. New York taxes it, so we set up Stripe Tax for the states where you sell. Confirm your own position with an accountant.
The NJEDA runs an Angel Investor Tax Credit for people who invest in New Jersey technology companies, NJ Ignite rent support for startups in approved workspaces, and a program that lets unprofitable technology companies sell net operating losses.
Medical and dental practices, law and accounting firms, contractors, restaurants, and logistics operators across Bergen County: the businesses we already build websites and apps for, and often the first customers of a New Jersey SaaS product.
Mango Consulting LLC is a Service-Disabled Veteran-Owned Small Business, which counts toward veteran-owned and supplier diversity spending goals for the companies and agencies that hire us.
Tell us what you want to build on a free 20-minute call and get a fixed price with a timeline. We respond within minutes during US business hours.
