Short Answer
SaaS (Software as a Service) delivers software over the internet via subscription. Learn how SaaS works, multi-tenancy, self-hosted vs SaaS tradeoffs, and what it takes to build a SaaS product. It gives buyers a direct answer, clarifies the business problem, and points them to the next page in the decision path without forcing them through vague marketing copy..
SaaS (Software as a Service) is a software distribution model in which applications are hosted in the cloud and delivered to users over the internet via a subscription. Users access SaaS products through a web browser — no installation, no hardware requirements, no IT infrastructure to manage.
Familiar SaaS examples include Salesforce, Slack, HubSpot, Notion, Zoom, and Google Workspace. The model has largely replaced packaged software in enterprise and SMB markets.
How SaaS Works
In a SaaS architecture:
- The software provider hosts the application on cloud infrastructure (AWS, GCP, Azure)
- Customers pay a recurring subscription fee (monthly or annual)
- Users log in via browser or mobile app
- The provider manages all updates, security patches, and infrastructure scaling
- Customer data is isolated within the multi-tenant environment
Customers get always-current software with zero maintenance burden. Providers build a recurring revenue business with compounding growth.
SaaS vs. Self-Hosted Software
| SaaS | Self-Hosted | |
|---|---|---|
| Installation | None — browser access | Installed on customer servers |
| Maintenance | Provider manages | Customer manages |
| Updates | Automatic | Manual |
| Data control | Provider's servers | Customer's servers |
| Cost model | Subscription (OpEx) | License + infrastructure (CapEx) |
| Customization | Limited to provider features | Unlimited |
When self-hosted is required
For industries with strict data residency or compliance requirements (healthcare, government, finance), self-hosted software may be mandatory. For most businesses, SaaS reduces total cost of ownership.
Multi-Tenancy: The Architecture of SaaS
Multi-tenancy is the technical model that makes SaaS economically viable. A single application instance — one codebase, one infrastructure — serves thousands of customers simultaneously. Each customer's data is isolated, but the underlying infrastructure is shared.
Benefits of multi-tenancy:
- Lower infrastructure cost per customer
- Shared updates and security patches
- Easier to maintain and scale
- New features deploy to all customers simultaneously
Implementation models:
- Shared database, shared schema — most efficient, requires careful data isolation
- Shared database, separate schema — moderate isolation, more storage overhead
- Separate database per tenant — highest isolation, highest cost, used for enterprise tiers
SaaS Business Metrics
Understanding SaaS health requires tracking specific metrics:
| Metric | Definition |
|---|---|
| MRR | Monthly Recurring Revenue — total subscription revenue per month |
| ARR | Annual Recurring Revenue — MRR × 12 |
| Churn Rate | Percentage of subscribers who cancel per period |
| LTV | Lifetime Value — average revenue per customer over their subscription lifetime |
| CAC | Customer Acquisition Cost — cost to acquire one paying customer |
| LTV:CAC Ratio | Sustainable SaaS businesses target 3:1 or higher |
A SaaS business is healthy when LTV significantly exceeds CAC and churn is low enough for compounding MRR growth.
Core Components of a SaaS Product
Building a SaaS product requires careful architectural decisions beyond typical website development:
- Authentication and authorization — user accounts, roles, permissions, SSO/SAML for enterprise
- Subscription billing — recurring billing, trial management, plan upgrades/downgrades (Stripe Billing)
- Multi-tenant data isolation — ensuring customer data cannot be accessed by other tenants
- Usage metering — tracking feature usage for usage-based billing models
- Admin dashboard — internal tools for support and customer management
- Webhook and API layer — integrations with third-party tools customers expect
- Audit logging — required for SOC 2, HIPAA, and enterprise compliance
How Moydus Helps
Moydus builds custom SaaS products and web applications from the ground up — handling architecture design, multi-tenancy implementation, subscription billing integration, and scalable web development. Whether you are validating an MVP or scaling an existing platform, we provide the technical foundation for sustainable SaaS growth.
Contact us to discuss your SaaS project.
Frequently Asked Questions
Related Terms
The Problem
- SaaS delivers software over the internet on a subscription basis — no installation or infrastructure management required.
- Multi-tenancy allows one codebase to serve thousands of customers with isolated data.
- SaaS businesses generate predictable, recurring revenue (MRR/ARR) with compounding growth.
The Solution
Moydus uses What Is SaaS? Software as a Service Explained for Decision-Makers to explain the decision clearly, connect the topic to real use cases, and move readers toward the next practical step instead of generic education.
How It Works
- Define the exact question the page needs to answer.
- Translate the answer into plain language, examples, and decision criteria.
- Route readers to a comparison or service page when they move from learning to evaluation.
Expected Result
The reader gets a direct answer, understands the tradeoffs faster, and has a clear path to the next relevant page instead of bouncing after the first scan.
Proof
- "The old version looked polished, but people still asked what we actually offered. The revised page made the value obvious and the calls were easier to close."
- Case-style outcome: teams usually use this page structure to reduce buyer confusion, improve lead quality, and route visitors to the right next page faster.
FAQ
What is the difference between SaaS and traditional software?
Traditional software is purchased once and installed on a device. SaaS is accessed via browser on a subscription, with the provider handling hosting, updates.
What is multi-tenancy in SaaS?
Multi-tenancy means a single instance of the software serves multiple customers (tenants), with each tenant's data isolated. It is more efficient than running separate.
What does MRR mean for a SaaS business?
MRR (Monthly Recurring Revenue) is the predictable monthly revenue from active subscriptions. It is the primary growth metric for SaaS businesses, alongside churn rate.
How long does it take to build a SaaS product?
A minimal viable SaaS product takes 3–6 months to build with an experienced team. Full-featured platforms with complex workflows, integrations, and enterprise features take.
Internal Links
- Hub page: SaaS Development Company: How to Choose One and What to Expect (2026)
- Spoke page: From 0 to SaaS in 14 Weeks: Building an HR Platform That Converts at 38%
- Spoke page: SaaS Development – Custom SaaS Platform Development Company
- Commercial page: SaaS for Fintech – Financial Software Development for Compliant, Scalable Products