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FundamentalsReviewed September 5, 2026

What is SaaS?

Software as a Service

SaaS, or software as a service, is software you use through a web browser or app and pay for with a subscription, while the provider hosts it, maintains it and handles updates.

How it works

Instead of buying a license and installing software on your own computers, you sign up for an account and log in online. The provider runs the servers, fixes bugs, adds features and keeps your data backed up.

Common examples

Email and office tools, CRMs, accounting software, project management apps, website builders and email marketing platforms are all usually sold as SaaS. Most businesses use several SaaS tools every day.

How SaaS companies measure success

Because revenue comes from subscriptions, SaaS businesses watch recurring revenue, churn rate, customer acquisition cost and lifetime value. Keeping customers matters as much as winning new ones.

Why SaaS matters

For buyers, SaaS means lower upfront costs and tools that stay current without IT work. For companies selling SaaS, the subscription model rewards strong onboarding, steady value and marketing that brings in customers who stay.

Why churn changed the marketing plan

A scheduling software company was signing up many trial users through ads, but most canceled within two months. Shifting focus to the industries that stayed longest and improving onboarding raised retention and made each new customer far more valuable.

Common mistakes

  • Chasing sign-ups over fit

    Cheap trials from the wrong audience can raise churn. Target the customers most likely to stay and grow.

  • Ignoring onboarding

    If new users don't see value quickly, they cancel. The first days after sign-up matter a lot.

  • Comparing tools on price alone

    When buying SaaS, consider setup time, integrations, support and data export, not just the monthly fee.

Applied, not theoretical

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