SaaS stands for Software as a Service. It is a model of delivering software over the internet on a subscription basis rather than as a product you purchase and install locally. The software runs on the vendor's servers (or cloud infrastructure); users access it through a browser or app without managing any underlying hardware or installation.
How SaaS works
In a SaaS model, the software vendor hosts the application, manages uptime, pushes updates, and handles security patches. Customers pay a recurring subscription fee (monthly or annual) to access the software. There is no CD to install, no local server to maintain, and no large upfront capital expenditure. When the vendor improves the product, all customers get the update automatically.
SaaS vs traditional software vs PaaS vs IaaS
- Traditional software (on-premise): you buy a licence, install it on your hardware, manage upgrades yourself. High upfront cost, slow to update. Examples: older ERP systems, Microsoft Office on CD.
- SaaS: cloud-hosted, subscription, fully managed by vendor. Examples: Salesforce, Slack, Zoom, Freshworks, Zoho.
- PaaS (Platform as a Service): cloud infrastructure for developers to build applications on. Examples: AWS Elastic Beanstalk, Heroku, Google App Engine.
- IaaS (Infrastructure as a Service): raw cloud computing resources (servers, storage, networking). Examples: AWS EC2, Google Cloud Compute Engine, Microsoft Azure VMs.
Well-known SaaS examples
- CRM: Salesforce, HubSpot, Zoho CRM
- Communication: Slack, Microsoft Teams, Zoom
- Project management: Asana, Monday.com, Jira
- Marketing: Mailchimp, Marketo, Klaviyo
- India-founded SaaS: Freshworks, Zoho, Chargebee, Razorpay, Postman, BrowserStack
Benefits of SaaS
- Lower upfront cost: pay a monthly or annual subscription instead of a large licence fee
- Automatic updates: the vendor pushes improvements; you do not need to manage upgrades
- Accessibility: access from any device with a browser; remote work-friendly
- Scalability: add or remove seats as your team grows or shrinks
- Predictable cost: subscription pricing makes budgeting straightforward
Risks and limitations of SaaS
- Dependency on internet connectivity: no connection means no access
- Data security and residency: data lives on the vendor's servers; compliance requirements (DPDP Act in India, GDPR in Europe) matter
- Vendor lock-in: migrating away from a SaaS tool can be costly once data and workflows are embedded
- Ongoing subscription cost: over many years, subscription costs can exceed what a one-time licence would have cost
Key SaaS business metrics
Because SaaS revenue is recurring, it is measured differently from one-time software sales. The core metrics are MRR (Monthly Recurring Revenue), ARR (Annual Recurring Revenue), churn rate, NRR (Net Revenue Retention), CAC (Customer Acquisition Cost), LTV (Customer Lifetime Value), and CAC payback period. See our SaaS Metrics guide for a full breakdown.
SaaS in India
India has become one of the world's leading SaaS ecosystems. Companies like Freshworks, Zoho, Chargebee, and BrowserStack have built multi-billion dollar businesses from India. The "India SaaS" model is characterised by lower price points for global customers (built on India's cost structure), deep product quality, and strong global go-to-market execution. The Indian SaaS market is expected to generate $50 billion in revenue by 2030 (NASSCOM estimates).
Frequently asked questions
- What is SaaS?
- SaaS (Software as a Service) is cloud-based software delivered via subscription. Instead of installing software on your computer or server, you access it through a browser. The vendor hosts and maintains it, pushes updates automatically, and charges a monthly or annual fee per user or account.
- What is an example of SaaS?
- Common SaaS examples include Salesforce (CRM), Slack (communication), Zoom (video conferencing), Mailchimp (email marketing), and Zoho (business applications). In India, Freshworks, Chargebee, and BrowserStack are well-known SaaS companies founded and headquartered locally.
- What is the difference between SaaS and cloud software?
- All SaaS is cloud software, but not all cloud software is SaaS. Cloud software is any software that runs on cloud infrastructure. SaaS specifically refers to software delivered via a subscription model to end users, typically through a browser. IaaS and PaaS are also cloud-based but serve developers and IT teams, not end users directly.
- Is SaaS the same as a subscription?
- Almost all SaaS is subscription-based (monthly or annual billing), but the subscription model is one characteristic of SaaS, not the definition. What defines SaaS is cloud delivery, multi-tenancy (all customers use the same codebase), and the vendor managing all infrastructure and updates.