{"id":5788,"date":"2026-11-11T16:41:01","date_gmt":"2026-11-11T19:41:01","guid":{"rendered":"https:\/\/nextage.com.br\/blog\/?p=5788"},"modified":"2026-11-11T16:41:01","modified_gmt":"2026-11-11T19:41:01","slug":"saas-business-models-multi-tenant-architecture-and-when-to-build-your-own","status":"publish","type":"post","link":"https:\/\/nextage.com.br\/blog\/en\/saas-business-models-multi-tenant-architecture-and-when-to-build-your-own\/","title":{"rendered":"SaaS: Business Models, Multi-Tenant Architecture, and When to Build Your Own"},"content":{"rendered":"

Building a SaaS (software as a service) product to sell is a decision that combines three choices: how the product charges, how the architecture isolates customers, and whether the company can sustain the product over time. This guide is for CTOs, product directors, and technology leaders who are considering building their own SaaS, not for those looking to buy one.<\/p>\n

The thread running through it is simple: the pricing model defines what the architecture must measure and isolate, and the two together define whether it is worth building, adapting an existing platform, or walking away. By the end, you will have five questions to guide that decision and a four-phase roadmap to get started.<\/p>\n

\"Professional<\/p>\n

What Is SaaS?<\/h2>\n

SaaS (software as a service) is a model in which the customer accesses an application over the internet, maintained by the vendor, usually through a subscription, without installing the software or managing the infrastructure. The vendor handles hosting, updates, security, and availability; the customer uses the product.<\/p>\n

It helps to distinguish SaaS from two neighboring cloud layers:<\/p>\n

\n\n\n\n\n\n\n\n
Model<\/th>\nWhat the vendor delivers<\/th>\nTypical use<\/th>\n<\/tr>\n<\/thead>\n
IaaS (infrastructure as a service)<\/td>\nServers, network, and storage<\/td>\nTeams that build their own platform on rented infrastructure<\/td>\n<\/tr>\n
PaaS (platform as a service)<\/td>\nAn environment to develop and run applications<\/td>\nTeams that develop without managing servers<\/td>\n<\/tr>\n
SaaS (software as a service)<\/td>\nThe finished application, accessed by browser or API<\/td>\nEnd users of the product<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

If your question is whether your company should buy a ready-made SaaS or develop custom software for internal use, that is a different decision. Here, the focus is on those who build a SaaS product to offer to the market.<\/p>\n

SaaS Business Models: How Pricing Works<\/h2>\n

The pricing model is the first architecture decision, even though it looks like a commercial one. Charging per user requires profile management for each customer; charging by consumption requires accurate measurement of each customer\u2019s usage. The more sophisticated the pricing, the more the architecture must record, isolate, and attribute to each customer.<\/p>\n

The table below links each model to what it demands from the architecture. It is an editorial reading by NextAge, consistent with what billing vendors such as Metronome<\/a> and Salesforce<\/a> say about usage measurement and billing infrastructure; it is not measured data.<\/p>\n

\n\n\n\n\n\n\n\n\n\n
Model<\/th>\nHow it charges<\/th>\nFits when<\/th>\nWhat it requires from the architecture<\/th>\n<\/tr>\n<\/thead>\n
Flat subscription<\/td>\nMonthly or annual fee per plan<\/td>\nThe product is simple and value is uniform<\/td>\nPlan and access control<\/td>\n<\/tr>\n
Tiered<\/td>\nPlans with different features<\/td>\nCustomers have distinct needs<\/td>\nFeature control per plan; possible isolation per tier<\/td>\n<\/tr>\n
Per seat<\/td>\nFee per active user<\/td>\nValue grows with the number of people<\/td>\nUser and role management per customer<\/td>\n<\/tr>\n
Usage-based<\/td>\nFee per consumption (calls, volume, credits)<\/td>\nCost and value vary widely by customer<\/td>\nUsage metering per customer and billing integration<\/td>\n<\/tr>\n
Hybrid<\/td>\nFixed base plus consumption or seats<\/td>\nB2B product with customers of different sizes<\/td>\nThe requirements above, plus unified billing infrastructure<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Per-Seat, Usage-Based, and Hybrid Pricing<\/h3>\n

Per-user pricing was the market standard for a long time. Usage-based pricing tracks the real cost of products with variable consumption, such as those that embed artificial intelligence. The hybrid model combines a recurring base with a variable component.<\/p>\n

According to Metronome<\/a>, the hybrid model offers predictable base revenue with room for expansion, but legacy billing systems often need engineering work to measure usage. Userpilot<\/a> describes hybrid pricing (per user plus credits) as the most common model in 2026. Both are vendors in this space, so their reading reflects the perspective of companies that sell in this market; treat it as a sign of a trend, not as a measurement.<\/p>\n

Multi-Tenant Architecture: What It Is and Why It Matters<\/h2>\n

Multi-tenant architecture is a model in which several customers (tenants) use the same application and the same infrastructure, with data and contexts isolated from one another. A tenant is a customer of the SaaS, usually a company, with its own users, data, and settings.<\/p>\n

The gain is economic: costs, updates, and operations are shared, and a fix released once reaches every customer. The risk is isolation: a design flaw can expose one customer\u2019s data to another, or let a high-consumption customer degrade the experience of the others (the so-called \u201cnoisy neighbor\u201d). Red Hat<\/a> and IBM<\/a> offer accessible definitions if you want to go deeper into the concept.<\/p>\n

Silo, Pool, and Bridge<\/h3>\n

AWS\u2019s Well-Architected Framework (SaaS Lens)<\/a> organizes isolation patterns into three categories. The AWS Guidance for Multi-Tenant Architectures<\/a> applies the same logic to the database, with the same trade-off between isolation, cost, and complexity. The three terms are:<\/p>\n