Custom Web App Development Company — SaaS, Enterprise, and Progressive Web Apps
Tech Exactly is a custom web app development company that builds scalable, secure web applications for startups, SaaS companies, and enterprises. Our custom web app development services cover the full stack — from frontend frameworks (React, Angular, Next.js) and backend systems (Node.js, Python, .NET) to cloud infrastructure (AWS, Azure, GCP) and DevOps pipelines.
We've built SaaS platforms that handle thousands of concurrent users, enterprise web applications that replaced legacy systems, and progressive web apps that work offline in low-connectivity environments. Every project ships with automated testing, CI/CD pipelines, and production monitoring — not just code.
4 years building production web applications | 50+ web apps shipped | $1M+/day processed through our platforms | 99.9% uptime SLA across client apps
Top Rated
Clients
Our Web Application Maintenance & Support Services
SaaS Application Development
Tech Exactly is a SaaS application development company that builds multi-tenant cloud platforms from MVP to scale. Our SaaS application development services cover the full product lifecycle — architecture design, core platform development, subscription billing, user management, analytics dashboards, and API layers for third-party integrations.
What we build:
- Multi-tenant SaaS platforms with tenant isolation and configurable workspaces
- Subscription management and billing (Stripe, Chargebee, custom)
- User authentication, role-based access, and SSO (OAuth 2.0, SAML)
- Admin dashboards with analytics, reporting, and user management
- Public APIs and developer portals for third-party integrations
- White-label SaaS products for reseller models
SaaS-specific architecture:
- Multi-tenant database design (shared schema vs isolated schema per tenant)
- Auto-scaling infrastructure (AWS ECS/EKS, Azure Container Apps)
- Feature flag systems for gradual rollouts
- Usage metering and rate limiting
- Zero-downtime deployments
Tech stack: React/Next.js frontend, Node.js/Python backend, PostgreSQL/MongoDB, Redis caching, AWS/Azure cloud, Stripe billing, Auth0/Clerk authentication.
Enterprise Web Application Development
Our enterprise web application development services help organizations replace spreadsheets, legacy systems, and disconnected tools with unified, scalable web platforms. We build internal tools, customer-facing portals, workflow automation systems, and data dashboards that integrate with existing enterprise infrastructure (ERP, CRM, HRIS, accounting).
What we build:
Internal operations dashboards and admin panels
Customer portals with self-service capabilities
Workflow automation platforms (approval chains, task routing, notifications)
Data visualization and business intelligence dashboards
Legacy system modernization (re-platforming to modern web tech)
Enterprise integrations (SAP, Salesforce, Oracle, HubSpot, custom ERPs)
SaaS-specific architecture:
Single Sign-On (SSO) with Active Directory, Okta, Azure AD
Role-based access control (RBAC) with granular permissions
Audit logging for compliance (SOC 2, HIPAA, GDPR)
High availability architecture (99.9%+ uptime)
Data encryption at rest and in transit
Disaster recovery and backup strategies
Progressive Web App (PWA) Development
Tech Exactly is a progressive web app development company that builds PWAs delivering app-like experiences through the browser — with offline functionality, push notifications, and home screen installation, without requiring app store submission. Our progressive web app development services are ideal for businesses that want mobile reach without the cost of maintaining separate iOS and Android apps.
What we build:
- Offline-first PWAs with service worker caching strategies
- Push notification systems for re-engagement
- PWAs with home screen installation (Add to Home Screen)
- Responsive PWAs that adapt to mobile, tablet, and desktop
- PWA migrations from existing websites or native apps
When to choose PWA over native:
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| Factor | PWA | Native App |
|---|---|---|
| Development cost | 40-60% less | Baseline |
| Time to market | 4-8 weeks faster | Baseline |
| Offline support | Yes (service workers) | Yes |
| Push notifications | Yes (Web Push API) | Yes |
| App store required | No | Yes |
| Hardware access | Limited (no BLE, NFC on iOS) | Full |
| Performance | 85-95% of native | 100% |
| Best for | Content, e-commerce, dashboards, field apps | Gaming, AR/VR, medical devices, heavy hardware |
Custom Web Application Development
Not every business fits into a SaaS template or off-the-shelf platform. Our custom web app development builds purpose-built web applications designed around your specific workflows, data models, and business logic. From bespoke custom web app development for niche industries to complex multi-system integrations — we build what Shopify, Salesforce, and WordPress can’t.
What we build:
- Business process automation tools (custom CRM, project management, inventory)
- Data collection and management platforms (forms, workflows, approvals)
- Marketplace and platform apps (two-sided, multi-vendor)
- Booking and scheduling systems
- Custom analytics and reporting platforms
- Industry-specific vertical applications (healthcare, fintech, logistics, real estate)
Our approach:
- Discovery sprint (1-2 weeks): Map workflows, define data models, wireframe key screens
- MVP build (6-12 weeks): Core functionality, deployed to production
- Iterate (ongoing): Add features based on user feedback and usage data
E-Commerce Web App Development
We build custom e-commerce web applications that go beyond Shopify — multi-vendor marketplaces, B2B trade portals, subscription commerce platforms, and custom storefronts with unique pricing models, complex inventory logic, or regulatory requirements that off-the-shelf platforms can’t handle.
What we build:
- Custom B2C storefronts (headless commerce with React/Next.js frontends)
- Multi-vendor marketplace platforms (commission management, vendor onboarding)
- B2B trade portals (bulk pricing, purchase orders, net terms)
- Subscription and recurring commerce (box subscriptions, SaaS-style billing)
- Inventory and warehouse management integrations
- Payment processing (Stripe, PayPal, multi-currency, crypto)
Web Portal Development
We build web portals that serve as centralized access points for customers, employees, partners, or vendors. Our web portal development connects multiple systems into a single interface — pulling data from CRMs, ERPs, databases, and third-party APIs into a unified, role-based dashboard.
What we build:
- Customer self-service portals (account management, support, billing)
- Employee/HR portals (onboarding, time tracking, benefits, documents)
- Vendor/partner portals (order management, invoicing, communication)
- Patient portals (health records, appointment scheduling, messaging)
- Student/learning management portals
API Development & Integration
We design and build RESTful and GraphQL APIs that connect your web application to internal systems, third-party services, and external data sources. Our API development includes documentation, versioning, rate limiting, authentication, and monitoring — so your integrations are reliable and maintainable.
What we build:
- RESTful and GraphQL API design and development
- Third-party API integrations (Stripe, Twilio, Salesforce, HubSpot, Plaid, AWS services)
- Webhook systems for real-time event-driven architectures
- API gateways with authentication, rate limiting, and analytics
- API documentation (OpenAPI/Swagger) and developer portals
- Legacy system API wrappers (expose legacy data through modern APIs)
Support, Maintenance & DevOps
Launching a web app is the starting line, not the finish. Our web app support covers ongoing maintenance, performance monitoring, security patching, infrastructure management, and feature updates — so your app stays fast, secure, and reliable as it grows.
What we provide:
- 24/7 uptime monitoring and alerting (Datadog, New Relic, CloudWatch)
- CI/CD pipeline setup and management (GitHub Actions, GitLab CI, Jenkins)
- Cloud infrastructure management (AWS, Azure, GCP)
- Database optimization and scaling
- Security patching and dependency updates
- Performance optimization (Core Web Vitals, load time, caching)
- Bug fixing and feature development (dedicated maintenance team or sprint-based)
Engagement models:
- Monthly retainer: Fixed hours per month for maintenance + small features
- Dedicated team: Full-time team for ongoing product development
- On-demand support: Ad-hoc bug fixes and urgent issues
Web App Development Tech Stack
Helping startups and enterprises with the right blend of experience and technology
Backend
We only use scalable, reliable, secure, and performant backend technologies to power our client’s digital products.
Nodejs
Python
Dot Net
PHP
Frontend
Our suite of web front-end technologies offers a delightful user experience.
Angular
React
Vue
JavaScript
jQuery
Database
Modern databases that are reliable, fast, secure, and widely accepted.
Postgres
MongoDB
MySQL
SQL Server
Take a look at our Case Studies
We are proud of what we have built. Let us walk you through our projects.
Explore How We Do The Business
We transform your vision into our reality with careful consideration.
Requirement Gathering
Our business analyst begins a thorough understanding of the project after an NDA is signed and finalized with the client. We prepare a detailed user journey for giving further recommendations.
Design Prototype and User Testing
We initiate the process by designing a clickable prototype which takes around 40 to 80 hours. Once we complete successful user testing, we send you a development quote.
Agile Development
For swift processing, our coordinator makes sprint goals. Only when you confirm the goals. We start the development. You will be continuously informed about the progress through weekly calls by our project coordinator.
Launch and Support
Once we make a beta launch of the app, we monitor its functioning. If the progress persists, we launch it officially. For the next 6 months, we provide free maintenance services for function monitoring.
Why Choose Tech Exactly as Your Custom Web App Development Company
Custom web app development is the perfect way to spur your business growth and achieve optimal performance
Full-Stack, In-House Team
Frontend, backend, database, DevOps, and QA — all in-house. No subcontracting. You get a single team that owns the entire stack, which means fewer handoff errors, faster debugging, and consistent code quality.
Enterprise Integration Experience
We've connected web applications to SAP, Salesforce, Oracle, HubSpot, and custom ERPs. Enterprise web application development isn't just about the app — it's about making it work within your existing infrastructure. We handle SSO (Okta, Azure AD), RBAC, audit logging, and compliance requirements.
SaaS Architecture Expertise
We've built multi-tenant SaaS platforms from scratch — subscription billing, tenant isolation, feature flags, usage metering, and auto-scaling infrastructure. If you're building a SaaS product, our team knows the architectural patterns that make or break your platform at scale.
Production-Grade from Day 1
Every web app ships with CI/CD pipelines, automated testing, monitoring, and alerting — not just code. We set up the infrastructure that lets your app run reliably at scale, not just the features that let you demo it.
Transparent Pricing, Full Code Ownership
You own 100% of the code, infrastructure configuration, and documentation. Full GitHub repo access from day one. No proprietary frameworks, no lock-in, no "platform fees" after launch.
Hear it straight from our Amazing Clients
This is why we do what we do
I’m most impressed with Tech Exactly’s ability to understand our challenges and come up with options to resolve them
Tech Exactly takes the time to listen to us and offers us 3–5 different options to achieve the expected results.
With other vendors I’ve worked with, I have to spend a lot of time explaining the challenge to them, and sometimes, they still don’t understand it.
Eric Shepherd
Foundation for Talent Transformation
“They are forthcoming, prompt, meticulous, sincere, punctual, and very professional. It's a joy to work with them!“
Akhil Chandra
Founder & Partner, Epiphany Labs
+ 0 %
Increase in free to paid subscriptions
“They’ve done a great job of meeting goals and deadlines as well as producing what was described in the scope of work.“
Kevin Eldredge
CAO, SSA Group
+ 0 %
Improvement in sales reconciliations timeline.
“They are so humble that even when the project is done, they always answer what we ask.“
Junie De Castro
World Fintech Festival Philippines
+ 0 %
Increase in user registrations and engagement
Frequently Asked Questions
Custom web app development services involve designing, building, and deploying web-based applications tailored to a business's specific workflows, data models, and user needs. Unlike off-the-shelf software (Salesforce, Shopify, WordPress), custom web apps are built from scratch to solve problems that existing tools can't address — complex business logic, unique data relationships, specific compliance requirements, or integrations with internal systems. Our custom web app development services cover the full lifecycle: discovery, UI/UX design, frontend and backend development, QA testing, deployment, and ongoing maintenance.
Custom web app development costs between $20,000 and $200,000+ depending on the app type and complexity. A simple MVP with 5-10 screens costs $20K-$40K and takes 6-10 weeks. A SaaS platform MVP with multi-tenancy and billing costs $40K-$80K and takes 10-16 weeks. A full enterprise web application with integrations (ERP, CRM, SSO) costs $60K-$150K and takes 12-24 weeks. The main cost drivers are number of user roles, integration complexity, compliance requirements, and design complexity.
SaaS application development is the process of building cloud-based software that users access through a web browser on a subscription basis. A SaaS application typically includes multi-tenant architecture (multiple customers sharing infrastructure), subscription billing (monthly/annual), user authentication with role-based access, and an admin dashboard. To develop a SaaS application, you start with market validation and MVP scoping, then build the core platform with multi-tenancy, integrate billing (Stripe, Chargebee), set up authentication and access control, and deploy on cloud infrastructure (AWS, Azure) with auto-scaling.
Progressive web app (PWA) development builds web applications that behave like native mobile apps — with offline support, push notifications, and home screen installation — but run in the browser without requiring app store submission. Choose a PWA when: (1) you want mobile reach without maintaining separate iOS and Android apps, (2) your users are in areas with unreliable internet connectivity, (3) your app is content-heavy, dashboard-based, or e-commerce focused, (4) you want faster time to market at 40-60% lower cost than native. Don't choose a PWA if you need deep hardware access (BLE, NFC on iOS), heavy 3D graphics, or medical device integration.
Enterprise web application development builds web-based software for organizations that need to connect multiple systems, handle complex user permissions, and meet compliance standards (SOC 2, HIPAA, GDPR). Enterprise web apps typically replace manual processes and legacy systems — examples include operations dashboards, customer portals, workflow automation tools, and business intelligence platforms. Enterprise web application development differs from standard web app development in three ways: (1) integration complexity — connecting to ERP, CRM, and internal systems, (2) security and compliance — SSO, RBAC, audit trails, and (3) scale — handling thousands of concurrent users with high availability.
A simple web application MVP takes 6-10 weeks. A SaaS platform MVP takes 10-16 weeks. A full-featured enterprise web application takes 12-24 weeks. A progressive web app takes 6-12 weeks. The timeline depends on feature scope, number of integrations, design complexity, and compliance requirements. We recommend starting with an MVP — launch the core functionality, get real user feedback, then iterate. This approach typically costs 40-60% less than building the "full vision" upfront.
We build five main types of web applications: (1) SaaS platforms — multi-tenant cloud software with subscription billing, (2) Enterprise web applications — internal tools, dashboards, and workflow automation connecting to existing systems, (3) Progressive web apps (PWAs) — browser-based apps with offline support and native-like experience, (4) E-commerce web apps — custom storefronts, marketplaces, and B2B trade portals, (5) Custom business applications — purpose-built tools for specific workflows, data management, and process automation.
Yes. We offer three post-launch support models: (1) Monthly retainer — fixed hours per month for maintenance, bug fixes, and small feature additions, (2) Dedicated team — a full-time team for continuous product development, (3) On-demand support — ad-hoc engagement for urgent issues. All support includes uptime monitoring, security patching, dependency updates, database optimization, and performance monitoring. We also provide a full handoff option — complete documentation, code walkthrough, and knowledge transfer — if you prefer to bring maintenance in-house.
Ready to Get Started?
Get a free quote and see what we can do for you.
Web App Security & Compliance
Data Encryption
AES-256 at rest, TLS 1.3 in transit for all web apps
Authentication
OAuth 2.0, MFA, biometric, SSO (Okta, Azure AD, Auth0)
Authorization
Role-based access control (RBAC) with granular permissions
SOC 2
Architecture designed for SOC 2 Type II compliance (audit trails, access controls, monitoring)
HIPAA
HIPAA-compliant infrastructure for healthcare web apps (encrypted PHI, BAAs with cloud providers)
GDPR / CCPA
Data privacy controls — consent management, data deletion, export capabilities
PCI DSS
Tokenized payment handling for fintech and e-commerce web apps
Security Testing
OWASP Top 10 assessment, dependency scanning (Snyk), penetration testing
Monitoring
Real-time intrusion detection, anomaly alerting, log aggregation
How Much Does Custom Web App Development Cost?
Because we hold the ReactJS expertise to deliver performance-driven and secure solutions
Simple Web App (MVP)
Cost Range: $20K–$40K
Timeline: 6–10 weeks
Key Cost Drivers: Feature scope, design complexity
SaaS Platform MVP
Cost Range: $40K–$80K
Timeline: 10–16 weeks
Key Cost Drivers: Multi-tenancy, billing integration, authentication
Full SaaS Platform
Cost Range: $80K–$200K
Timeline: 4–8 months
Key Cost Drivers: Feature depth, integrations, scaling architecture
Enterprise Web Application
Cost Range: $60K–$150K
Timeline: 12–24 weeks
Key Cost Drivers: Integrations like ERP, CRM, SSO, compliance requirements
E-Commerce Web App
Cost Range: $30K–$80K
Timeline: 8–14 weeks
Key Cost Drivers: Catalog size, payment integrations, inventory logic
Progressive Web App
Cost Range: $25K–$60K
Timeline: 6–12 weeks
Key Cost Drivers: Offline capability, push notifications, caching strategy
Web Portal
Cost Range: $30K–$70K
Timeline: 8–14 weeks
Key Cost Drivers: Number of integrations, user role complexity
Legacy Modernization
Cost Range: $50K–$150K+
Timeline: 12–24 weeks
Key Cost Drivers: Data migration, system complexity, parallel operation
Engagement Models
Fixed Price
Best For: MVPs and well-defined projects
How It Works: Scope, timeline, and price agreed upfront. Sprint-based delivery with defined milestones.
Time & Materials
Best For: Complex or evolving projects
How It Works: You pay for actual time spent. Weekly reports, sprint demos, full transparency. Offers maximum flexibility.
Dedicated Team
Best For: Long-term products needing continuous development
How It Works: A full-time team (frontend + backend + QA + PM) works exclusively on your product. You set priorities; we execute.
MVP Sprint
Best For: Startups validating ideas quickly
How It Works: 8-week fixed engagement: discovery (1 week), design (2 weeks), development (4 weeks), launch (1 week). Designed to get to market fast.
Fintech App Development Services — What We Build
Payment platforms, lending systems, trading dashboards, and regulatory-compliant financial software, built for scale and security.
1. Discovery & Scoping
Timeline: Week 1–2
What Happens: We map your business workflows, define user roles, identify integrations, and produce a detailed scope document with wireframes. You know exactly what you’re getting before development starts.
2. UI/UX Design & Prototyping
Timeline: Week 2–4
What Happens: Clickable prototype (Figma) covering all key screens. You test the prototype with real users before we write code. Takes 40–80 hours depending on complexity.
3. Architecture & Tech Stack Selection
Timeline: Week 3–4
What Happens: We define the database schema, API architecture, authentication approach, hosting infrastructure, and CI/CD pipeline. For SaaS, we design the multi-tenancy model. For enterprise apps, we map SSO and integration architecture.
4. Sprint-Based Development
Timeline: Week 4–16+
What Happens: 2-week sprints with deployable increments. You see working software every 2 weeks, not just at the end. Sprint demos, code reviews, and automated testing on every commit.
5. QA & Security Testing
Timeline: Ongoing + Final Sprint
What Happens: Automated testing (unit, integration, E2E) runs on every commit. Final sprint includes manual QA, cross-browser testing, accessibility audit, and security assessment (OWASP Top 10).
6. Deployment & Launch
Timeline: Week 1 post-dev
What Happens: We deploy to production with monitoring, alerting, and rollback capability. Beta launch first, then full launch after monitoring period.
7. Post-Launch Support
Timeline: Ongoing
What Happens: Performance monitoring, bug fixes, security patches, and feature iterations. We stay on as your development partner or hand off cleanly with full documentation.
Web App Development Tech Stack
Custom Web App Development for Every Industry
Fintech
Payment platforms, lending dashboards, insurance portals
Example: Loan lifecycle management platform, payment gateway integration
Healthcare
Patient portals, EHR-connected dashboards, telemedicine web apps
Example: HIPAA-compliant patient portal with Epic FHIR integration
E-Commerce
Multi-vendor marketplaces, subscription commerce, B2B trade portals
Example: Custom marketplace with dynamic pricing and vendor management
Education
Learning management systems, student portals, assessment platforms
Example: Custom LMS with video streaming and progress tracking
Logistics
Fleet management dashboards, route optimization, warehouse management
Example: Real-time fleet tracking dashboard with GPS integration
Real Estate
Property management platforms, listing portals, CRM tools
Example: Custom property management app with tenant portal