What Is SaaS? The 2026 Enterprise Guide to Software as a Service

Short definition

SaaS is software delivered not as an installer but as a cloud-hosted service accessed through browser or mobile, billed on a subscription. The customer does not run servers, does not patch, does not buy perpetual licenses; they pay monthly or annually and use the product.

Examples: iş birliği, not, CRM, pazarlama otomasyonu, e-ticaret, tasarım, iletişim ve verimlilik platformları.

Classic software vs SaaS

Criterion

Classic

SaaS

|---|---|---|

Delivery	CD / on-prem	Browser / mobile
License	One-off purchase	Subscription
Updates	Manual, yearly	Continuous
Architecture	Single tenant	Multi-tenant
Data	Customer server	Provider cloud

How it works

Multi-tenant database, authentication + RBAC + SSO, global ödeme altyapıları/Paddle billing, feature flags, per-tenant observability, continuous deployment.

Pros

Fast start, predictable OPEX, automatic updates, scalability, mobile/remote, less IT load.

Cons

Data residency, vendor lock-in, limited customization, TCO over long-term.

Pricing models

Per seat, usage-based, tiered, freemium, platform fee, enterprise custom.

SaaS vs PaaS vs IaaS

SaaS: use only. PaaS: provide code. IaaS: provide OS + app.

Build one?

Discovery → MVP (10-14 weeks) → PMF → scale. See SaaS guide 2026.

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*Makrops builds B2B SaaS MVPs and vertical SaaS products with multi-tenant architecture, subscription billing, SSO and global ödeme altyapıları integration. 12-16 week MVP delivery. SaaS service or contact.*