# What Is SaaS? Meaning, Types, and Examples

> SaaS is cloud software you access in a browser on a subscription. Learn the definition, how it works, IaaS vs PaaS, examples, and when custom software fits.

**URL:** https://www.ciptadusa.com/blog/saas-adalah  
**Type:** blog  
**Author:** PT Cipta Dua Saudara  
**Category:** Engineering  
**Published:** 2026-10-17  
**Cover:** https://www.ciptadusa.com/media/uploads/blog/2026-10/1792203712427-saas-adalah-20261017.webp  

## Article

SaaS stands for Software as a Service: a cloud-based software model that delivers applications to end users through an internet browser. SaaS vendors host services and applications so customers can access them on demand; you focus on using the software, not maintaining the infrastructure behind it ([source](https://aws.amazon.com/what-is/saas/)). IBM defines SaaS as cloud-hosted software delivered over the internet to computing devices, while providers operate, manage, and maintain the software and the infrastructure it runs on ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

This article covers the SaaS definition, how it works, benefits and trade-offs, how SaaS compares with PaaS and IaaS, common application types, example platforms, when SaaS is enough versus when custom software fits better, and how to evaluate a vendor.

## What SaaS Means

In traditional IT, companies buy licenses, install software on their own servers or workstations, and own installation, patching, and infrastructure. With cloud computing, the provider owns, manages, and maintains the assets; customers consume them over the internet and pay on a subscription or pay-as-you-go basis ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

A typical SaaS pricing aspect is subscription or pay-as-you-use billing, instead of buying all functionality at once in one large purchase. AWS uses web-based third-party email as a common example: you send and receive mail without managing product feature work or the servers and operating systems the email program runs on ([source](https://aws.amazon.com/what-is/saas/)).

IBM describes SaaS as the most widely used public cloud computing service and the dominant software delivery model today ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

## How SaaS Works

SaaS uses a cloud delivery model. Vendors host applications and data on their own servers and databases, or on third-party cloud servers. They also manage platforms, operating systems, and middleware ([source](https://aws.amazon.com/what-is/saas/)).

After you subscribe, access is granted through browser registration and login. Vendors adopt a multi-tenant model: one version of the solution is hosted on the vendor’s servers and provided to individual subscribers ([source](https://aws.amazon.com/what-is/saas/)). IBM notes that in multi-tenant architectures, each customer’s data and configurations are kept separate through data isolation, tenant identifiers, and related controls ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

### Service level agreements (SLAs)

An SLA is a legal contract that sets terms for using the SaaS product: uptime, security, support, automatic updates, and your responsibilities as a client. AWS notes that most businesses need to own their data wherever it is stored; a standard SLA confirms in writing that your company retains ownership and the right to retrieve data at any time, including downloading and backing it up locally ([source](https://aws.amazon.com/what-is/saas/)).

## Benefits of SaaS

AWS summarizes several SaaS benefits ([source](https://aws.amazon.com/what-is/saas/)):

- **Cloud accessibility.** Access from any device with an internet connection, which matters for hybrid and remote work.
- **Lower upfront costs.** Subscription pricing reduces early license, installation, or infrastructure management costs; the vendor runs compute on its servers.
- **More predictable ongoing costs.** You can plan annual software spend; maintenance is covered by the subscription; you avoid buying extra server capacity yourself when scaling.
- **Rapid deployment.** On-premises install and configuration steps are removed, so rollout can start once the enterprise subscription is active.
- **On-demand scalability.** Add services or storage without upgrading your own infrastructure.
- **Reliability.** Vendors invest in cybersecurity and disaster recovery; AWS states that many SaaS vendors promise 99% or even 99.9% uptime, assuming a reliable internet connection ([source](https://aws.amazon.com/what-is/saas/)).
- **Automatic updates.** Incremental updates and security patches can deploy without local IT support.
- **Integration.** Third-party SaaS apps can connect to other platforms through APIs.
- **Real-time data and analytics.** Many SaaS apps collect usage and performance data for operational insight.

IBM adds that customers can purchase and start using SaaS applications quickly—within hours or days—with a low upfront cost (such as the first month’s subscription), and can move between tiers as needs change, noting that enterprise contracts may restrict downgrades ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

## Trade-offs and Risks

Convenience comes with trade-offs. IBM notes that because SaaS apps are easy to access and deploy, they can proliferate without IT staff’s knowledge—SaaS sprawl that can drive wasteful spend, inefficient workflows, data silos, and security risk ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

Vendor lock-in is another concern: proprietary technology, vendor-specific API integrations, and application dependencies can make switching providers complex and expensive ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

A 2026 Zylo report cited by IBM states that the average organization manages 305 SaaS apps, while large enterprises use nearly 700 on average ([source](https://www.ibm.com/think/topics/iaas-paas-saas)). Those figures highlight the need for inventory and governance, not a reason to avoid SaaS altogether.

## SaaS vs PaaS vs IaaS

SaaS, PaaS, and IaaS are the three traditional cloud service models. AWS and IBM distinguish them by which layers the provider manages versus the customer ([AWS source](https://aws.amazon.com/what-is/saas/), [IBM source](https://www.ibm.com/think/topics/iaas-paas-saas)).

| Aspect | IaaS | PaaS | SaaS |
| --- | --- | --- | --- |
| Focus | On-demand compute, storage, networking | A platform to build and run applications | Ready-to-use apps for end users |
| Provider role | Infrastructure (servers, networks, hypervisors) | Servers, runtimes, middleware, developer tools | The application plus underlying infrastructure |
| Customer role | OS, data, apps, middleware | Applications, development pipelines, data | Permissions, configuration, connected services |
| Example direction | AWS EC2, Azure VM, Google Compute Engine | Heroku, Elastic Beanstalk, Google App Engine | Salesforce, Slack, Box, Notion, Figma |

IBM’s framing: IaaS offers fine-grained infrastructure control but requires more technical expertise; SaaS offers relatively little control but is accessible to non-technical users; PaaS sits in between ([source](https://www.ibm.com/think/topics/iaas-paas-saas)). The models are not mutually exclusive—many organizations use all three.

AWS’s short contrast: PaaS gives managed infrastructure for application development, while SaaS is used for specific tasks; IaaS supplies core components such as servers or storage, while SaaS offers the most complete third-party software and maintenance choice ([source](https://aws.amazon.com/what-is/saas/)).

## Common SaaS Application Types

AWS lists commonly used SaaS application types ([source](https://aws.amazon.com/what-is/saas/)):

- Customer Relationship Management (CRM)
- Enterprise Resource Planning (ERP)
- Email marketing software
- Accounting software
- Human resources software
- Security software
- Collaboration tools
- Document editing services
- Communication software
- Contact center software

IBM also groups SaaS use cases around communication and collaboration, project management and DevOps, security and identity, and data and analytics ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).

Related definitions on this site:

- CRM meaning and types: [What Is CRM?](https://www.ciptadusa.com/en/blog/crm-adalah)
- ERP modules and deployment types (including cloud/SaaS ERP): [What Is ERP?](https://www.ciptadusa.com/en/blog/erp-adalah)

## Example SaaS Products

Example platforms for comparison (not a ranking; check official pages for features, pricing, and compliance before you choose):

- **[Salesforce](https://www.salesforce.com/).** A cloud CRM that IBM cites as a SaaS example for customer relationship management ([source](https://www.ibm.com/think/topics/iaas-paas-saas)).
- **[HubSpot](https://www.hubspot.com/).** Subscription marketing and CRM platform.
- **[Microsoft 365](https://www.microsoft.com/microsoft-365).** Cloud productivity and collaboration suite.
- **[Google Workspace](https://workspace.google.com/).** Browser-based email, documents, and collaboration.
- **[Slack](https://slack.com/), [Zoom](https://zoom.us/), [Dropbox](https://www.dropbox.com/).** Collaboration, communication, and file storage examples placed in the SaaS category by IBM/AWS ([IBM source](https://www.ibm.com/think/topics/iaas-paas-saas), [AWS source](https://aws.amazon.com/what-is/saas/)).
- **[SAP](https://www.sap.com/), [Oracle Cloud ERP](https://www.oracle.com/erp/).** ERP suites available in cloud/SaaS models; module context is in [What Is ERP?](https://www.ciptadusa.com/en/blog/erp-adalah).

If your priority is sales pipeline and customer service, see [Zetta CRM](https://www.ciptadusa.com/en/incubating/zetta-crm) and the positioning comparison in [Zetta CRM vs legacy CRM](https://www.ciptadusa.com/en/blog/zettacrm-vs-legacy-crm-position-comparison-20260617).

## SaaS or Custom Software?

SaaS fits when your processes are close enough to the product’s standard flows, you want to start without building infrastructure, and you can accept the vendor’s feature roadmap.

Custom software is a stronger fit when:

- Operational flows are unique and cannot be forced into SaaS configuration without stacked workarounds.
- Integrations with existing systems (ERP, MES, marketplaces, banks) need tight API and data control.
- Code ownership, data residency, or industry compliance demands control that the SaaS package does not offer.
- Long-term seat/subscription costs approach or exceed the investment to build a module for one critical workflow.

AWS notes that third-party SaaS applications can be built and run on cloud infrastructure; some companies use AWS SaaS Factory to accelerate a SaaS journey. AWS-reported examples: CyberArk reduced time to market by 30% after building cloud-native shared services; Cohesity reported a 50% acceleration in time to market for its DMaaS launch ([source](https://aws.amazon.com/what-is/saas/)). Those figures describe vendor product-build cases, not client project price ranges.

To decide whether your business needs purpose-built software, read [when a business needs custom software](https://www.ciptadusa.com/en/blog/kapan-bisnis-butuh-software-custom-2026). Cost components are in [web app cost components](https://www.ciptadusa.com/en/blog/biaya-pembuatan-aplikasi-berbasis-web), and post-launch care is in [app maintenance cost](https://www.ciptadusa.com/en/blog/biaya-maintenance-aplikasi). Delivery process framing is in [What Is SDLC?](https://www.ciptadusa.com/en/blog/sdlc-adalah).

## How to Evaluate a SaaS Vendor

1. **Map the process you want to replace.** Write the actual flow (not the brochure ideal) and where data is re-entered.
2. **Read the SLA and data ownership terms.** Confirm export rights, storage location, retention, and offboarding steps in writing.
3. **Test integrations.** Check APIs, webhooks, and connectors to systems you already use (CRM, ERP, payment, messaging).
4. **Calculate total cost of ownership.** User seats, add-ons, implementation, training, and exit costs (export plus migration).
5. **Review security and access.** SSO, roles, audit logs, encryption, and shared-responsibility duties for identity and your devices ([IBM source](https://www.ibm.com/think/topics/iaas-paas-saas)).
6. **Pilot with real users.** Run one team before a wide rollout to catch SaaS sprawl early.
7. **Prepare an exit plan.** Data backups and a vendor-switch scenario before the contract is signed.

For choosing an implementation or development partner in West Java, see [how to choose a software development partner](https://www.ciptadusa.com/en/blog/pilih-jasa-pembuatan-software-jawa-barat-20260907).

## FAQ

### What does SaaS stand for?

SaaS stands for Software as a Service ([source](https://aws.amazon.com/what-is/saas/)).

### What is the difference between SaaS, PaaS, and IaaS?

IaaS provides infrastructure (compute, storage, networking). PaaS provides a platform to build applications. SaaS provides ready-to-use applications. Customer control decreases from IaaS to SaaS ([IBM source](https://www.ibm.com/think/topics/iaas-paas-saas), [AWS source](https://aws.amazon.com/what-is/saas/)).

### Are CRM and ERP SaaS?

CRM and ERP can be delivered as SaaS when the vendor hosts the application and you access it through a subscription/browser. Not every CRM/ERP is SaaS by default—some are on-premises or hybrid. See [What Is CRM?](https://www.ciptadusa.com/en/blog/crm-adalah) and [What Is ERP?](https://www.ciptadusa.com/en/blog/erp-adalah).

### Does the vendor own data in SaaS?

According to AWS, in most cases an SLA states that your company retains ownership and the right to retrieve data; you still need to verify that in the specific vendor contract you sign ([source](https://aws.amazon.com/what-is/saas/)).

### When is SaaS not enough?

When processes are too specific, integrations need deep control, or code/data ownership is a business requirement—evaluate custom software or a mix of SaaS plus custom modules.

## Choose the Model That Fits Your Operations

PT Cipta Dua Saudara helps businesses decide whether they need a SaaS subscription, integration with existing systems, or [custom software development](https://www.ciptadusa.com/en/services/software) for flows that off-the-shelf products do not cover. For customer and pipeline work, we build [Zetta CRM](https://www.ciptadusa.com/en/incubating/zetta-crm). Start with an [IT consulting](https://www.ciptadusa.com/en/services/consulting) session or browse our [portfolio](https://www.ciptadusa.com/en/works).


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