Investor-ready SaaS MVPs for NYC founders: fixed price from $25,000, live in 8–10 weeks, with Stripe billing, a clean architecture, and the code, accounts, and IP in your company's name. Headquartered in Queens, NY.
Updated · Reviewed by the AppDesign360 engineering team
AppDesign360 (Mango Consulting LLC) is a SaaS development company headquartered in Queens, New York, that builds and supports SaaS products for New York City startups. A first version with sign-in, a PostgreSQL database, Stripe billing, and an admin dashboard costs $25,000–$45,000 at a fixed price and launches in 8–10 weeks. The code, cloud accounts, and intellectual property are in your company's name from day one, which is what investors look for in technical due diligence.
A New York startup has two clocks running: runway and the next raise. The first version of your product has to reach paying users before the first runs out, and hold up when the second brings investors to look under the hood. We build for both. You get a product customers can sign up for and pay for in 8–10 weeks, at a price fixed before we start.
We are headquartered in Queens and work Eastern hours with founders in Manhattan, Brooklyn, Queens, the Bronx, and Staten Island. TourSyncer, TraderCongress, and ResumeFlight are SaaS products in production that we designed and engineered end to end. Open them, sign up, and judge the work before you book a call.
Mango Consulting LLC is the legal entity, an SBA-certified Service-Disabled Veteran-Owned Small Business founded in 2018. AppDesign360 is the brand we use for SaaS, web, and app work. Our New Jersey team is based across the Hudson in Teaneck.
Why NYC founders choose AppDesign360
A fixed price that protects your runway. One number and one launch date in writing. No hourly meter running while you are fundraising.
Built for due diligence. Code, cloud accounts, and IP in your company's name, a clean repository history, documented architecture, and a list of every dependency and its license.
A product, not a pitch-deck demo. Real sign-in, real Stripe billing, and real separation of customer data, so the traction you report is real too.
Eight to ten weeks. We cut scope to hit the date, and we tell you in writing what we cut and why.
Queens rates, not Midtown rates. Senior US-based engineers without Manhattan rent in the price.
You talk to the engineers. No account managers in between, and a demo on a staging link every two weeks.
Launch with a way to be found. The marketing site, pricing page, and search and AI visibility setup (SEO, AEO, GEO) ship with the product.
We stay until you have your own team. 30 days of fixes included, then support and new features on a retainer or hourly from $25, and a clean handover when you hire.
Recent work
TourSyncer
Multi-tenant SaaS platform
All-in-one tour operator platform with real-time bookings, dynamic-pricing itineraries, invoicing, staff scheduling, and a built-in CRM.
Clean multi-workspace SaaS architecture built from the ground up
Bring-your-own-key Stripe integration for zero-commission payments
Delivered on time; the client calls it one of the best custom SaaS teams they have worked with
An MVP built to raise money has two audiences. Customers need it to work. Investors need to see that it was built properly and that the company owns it. This is what we deliver for both.
One workflow, finished
The single job customers will pay for, designed and built completely, instead of five features built halfway.
Real billing
Stripe subscriptions, trials, upgrades, and failed-payment recovery, so monthly recurring revenue is a number you can show.
Traction metrics
Sign-ups, activation, retention, and revenue tracked from the first user, ready for your investor update.
Architecture that outlives the demo
Multi-tenant data separation, roles, and a PostgreSQL schema planned for the next thousand customers.
Security basics done
Encrypted secrets, least-privilege access, backups with a tested restore, rate limits, and error tracking.
A handover pack
Architecture notes, environment setup, dependency and license list, and an access list, ready for a data room.
What investors check in technical due diligence
Every investor runs a different process, and we cannot speak for any of them. These are the questions that come up most often, and we build so each one has a clear answer.
Who owns the code? Signed IP assignment from everyone who wrote it, and a repository in the company's name.
Who controls the accounts? Hosting, database, domain, Stripe, and email opened by the company, with the founders as owners.
Is any open-source license a problem? A list of dependencies and licenses, with nothing that forces you to publish your own code.
Is customer data safe and separated? Tenant isolation in the database, access controls, backups, and a privacy policy that matches what the product does.
Will it scale past the first customers? A documented architecture and a realistic view of infrastructure cost per customer.
What happens if a developer leaves? Documentation, automated deployment, and tests on the paths that handle money.
Are the numbers real? Revenue in Stripe and usage in analytics that reconcile with the figures in the deck.
Pricing
SaaS Blueprint
$2,500 – $5,000
1–2 weeks
Discovery workshop and written requirements
User flows and a clickable prototype of the core screens
Data model, architecture plan, and third-party service list
Fixed-price quote and timeline for the build
Yours to keep; credited toward the build if you continue with us
SaaS MVP
$25,000 – $45,000
8–10 weeks
One core workflow, designed and built end to end
Sign-in, workspaces, and roles
PostgreSQL database with automated backups
Stripe subscriptions and a customer billing portal
Admin dashboard, staging, automated deployment, and monitoring
Marketing site with pricing and sign-up
30 days of post-launch fixes
Full SaaS product
$45,000 – $80,000
10–14 weeks
Everything in the MVP
Multiple workflows or user types
Team invitations, permissions, and an audit log
Third-party integrations and webhooks
Email, SMS, or in-app notifications
Reporting, data export, and tiered or usage-based plans
SaaS platform
$80,000 – $120,000+
14–16+ weeks
Marketplace or multi-sided products
AI features with usage limits per plan
Data pipelines, search, and real-time updates
Public API with keys and documentation
Single sign-on and enterprise controls
HIPAA-aware data handling where health data is involved
Support and growth
From $25 / hour
Monthly retainer or hourly
Monitoring, security patches, and backups
Bug fixes and small changes
New features in two-week sprints
Performance tuning as usage grows
No lock-in: code and accounts stay in your name
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, so spend follows progress. Hosting, Stripe fees, and third-party services are billed by the providers to your company's own accounts.
From MVP to your own engineering team
Most startups we build for do not want an agency forever. They want a first version, a few months of steady improvement, and a clean handover when the first engineers are hired. We plan for that from the start.
Every build includes 30 days of fixes. After that, support and new features run on a monthly retainer or hourly from $25. When you hire, we work alongside your engineers in your repository, then step back. Because the code and accounts were always yours, there is nothing to transfer.
Monitoring and incident response
Uptime checks, error tracking, and alerts, with fixes shipped through the same staging and deployment pipeline as the original build.
Security and dependency updates
Framework, library, and database patches applied on a schedule, plus key rotation and access reviews.
Bug fixes and small changes
Copy edits, form changes, new report columns, and the edge cases real customers uncover.
New features in sprints
Your phase-two list, scoped and priced feature by feature, delivered in two-week cycles with a demo at the end of each.
Performance and scaling
Query tuning, caching, background jobs, and infrastructure sizing as usage grows, so the hosting bill tracks revenue.
Billing and customer operations
Plan and price changes, coupons, tax settings, refunds, and the admin tools your support team asks for.
Industries we build for
Fintech and data products
Dashboards, alerts, and client portals with audit logs and role-based access. TraderCongress tracks public trading disclosures in real time.
Healthtech
Patient and provider portals with HIPAA-aware data handling and vendors that sign business associate agreements.
Proptech and real estate
Listing tools, tenant and owner portals, maintenance workflows, and payments.
Media, marketing, and creator tools
Content workflows, analytics, and AI-assisted writing and editing. ResumeFlight is an AI document product we built.
Marketplaces and B2B platforms
Two-sided products with listings, messaging, and payments, like the Hollow Purple B2B marketplace.
Travel and hospitality
Booking, itinerary, and operations platforms, like TourSyncer for tour operators.
How NYC startups get a first version built
AppDesign360 fixed-price MVP
Large Manhattan agency
Offshore team
Technical co-founder or first hire
Price
$25,000 – $45,000, fixed
Higher rates; often hourly or a retainer
Lowest hourly rate; hours hard to predict
Equity, salary, or both
Time to first release
8–10 weeks
Varies with team and process
Varies; overnight feedback cycles
After months of recruiting
Who you talk to
The engineers, in Eastern hours
Often an account team
A project manager across time zones
Your own team
Ownership of code and accounts
Your company, from day one
Check the contract
Check the contract and how it is enforced
Your company
Best for
A first version before a raise
Large budgets and brand work
Well-specified work with strong in-house oversight
After the product has traction
Generalized; individual firms differ. Ask every vendor the same questions and compare written scopes.
Built for how New York startups work
We are headquartered in Queens and meet founders in person by appointment across New York City. Day to day, the work runs over video calls, a shared channel, and a staging link you can open at any time.
The state treats remotely accessed prewritten software as taxable, and New York City's combined sales tax rate is 8.875%. We set up Stripe Tax so it is collected correctly. Confirm your own position with an accountant.
State credits for technology companies
New York's Qualified Emerging Technology Company (QETC) rules include an employment credit for qualifying companies and a capital tax credit for their investors. Ask your accountant whether you qualify.
City programs for founders
NYCEDC's Venture for NYC initiative runs programs such as the Founder Fellowship, which connects early-stage founders with capital and networks.
Sectors we build for
Fintech and data products, healthtech, proptech, media and creator tools, marketplaces, and travel: the industries New York startups sell into.
What's Included
Discovery, user flows, and a clickable prototype before the build
Custom interface design and a reusable component library
Multi-tenant architecture with workspaces, roles, and permissions
Authentication: email, Google or Microsoft sign-in, invitations, and two-factor
PostgreSQL database, migrations, and automated backups
Stripe subscriptions, trials, invoices, and a customer billing portal
Admin dashboard for accounts, revenue, and support
Staging and production environments with automated deployment
Error tracking, uptime monitoring, and security headers
Marketing site, pricing page, and onboarding flow with SEO, AEO, and GEO setup
Documentation and handover, with code and accounts in your name
30 days of post-launch fixes, then optional support
How It Works
Week 0: free 20-minute scoping call, then a written scope, fixed price, and launch date you can put in an investor update
Weeks 1–2: user flows and a clickable prototype you can show customers and investors before the build
Weeks 3–8: build in two-week sprints, each ending with a demo on a working staging link
Weeks 9–10: billing tests, security review, beta users, and the handover pack
Launch: production cutover, monitoring switched on, marketing site live
After launch: 30 days of fixes, then support and new features until your own team takes over
With AppDesign360, a SaaS MVP with sign-in, a PostgreSQL database, Stripe billing, an admin dashboard, and a marketing site costs $25,000–$45,000 at a fixed price and launches in 8–10 weeks. Fuller products run $45,000–$80,000, and platforms with AI features, data pipelines, or a marketplace model run $80,000–$120,000 or more.
Yes. AppDesign360 (Mango Consulting LLC) is headquartered in Queens, New York, and builds SaaS products for pre-seed and seed-stage startups at a fixed price. If you are not ready for a full build, the SaaS Blueprint delivers a clickable prototype, a technical plan, and a fixed quote in 1–2 weeks for $2,500–$5,000.
Yes, if the date is at least 8–10 weeks away. We fix the scope to fit the date and write down what moves to phase two. If you have less time, the SaaS Blueprint gives you a clickable prototype to show in 1–2 weeks.
We build so the common questions have clear answers: the code, cloud accounts, and IP are in your company's name, the repository has a clean history, dependencies and their licenses are listed, and the architecture is documented. Every investor runs a different process, so we cannot speak for a specific review.
Yes. We sign IP assignment documents that transfer all work product to your company, and the repository, hosting, database, Stripe account, and domain are opened in your company's name.
Yes. We work in your repository, follow your code review process, and take the parts your team does not have time for, from a single feature to the whole first version.
Yes. We review the code, keep what is sound, and add secure sign-in, database migrations, Stripe billing and webhooks, deployment, and security hardening. Small gaps are handled in Vibe Coding Support sessions from $125. Larger rebuilds are scoped at a fixed price.
Changes are priced in writing before we start them. Anything that can wait goes on the phase-two list, so the launch date holds.
In most cases, yes. New York treats remotely accessed prewritten software as taxable, and New York City's combined sales tax rate is 8.875%. New Jersey generally does not tax SaaS. We configure Stripe Tax for the states where you sell. This is general information, so confirm your obligations with an accountant.
We are headquartered in Queens, NY, with a New Jersey team based in Teaneck. In-person meetings are available by appointment in New York City. Most project work runs over video calls and a shared staging link.
Every build includes 30 days of fixes. After that we provide monitoring, security updates, bug fixes, and new features on a monthly retainer or hourly from $25. When you hire your own engineers, we work alongside them and hand over cleanly.
Yes. Mango Consulting LLC is the legal entity, an SBA-certified Service-Disabled Veteran-Owned Small Business. AppDesign360 is the brand we use for SaaS, web, and app work. Same engineers, same quote form at quote.appdesign360.com.
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