--- title: "ASP.NET Zero vs Free .NET Templates and Open-Source Foundations" description: "Free .NET templates and open-source foundations vs ASP.NET Zero: what free starters carry, what stays with your team, and when free is the right choice." url: "https://aspnetzero.com/compare/free-open-source-templates" image: "https://aspnetzero.com/Images/common/open-graph/compare-free-open-source-templates.png" --- ASP.NET Zero vs free open-source templates # A free foundation is a good start. The question is what you finish yourself. Free .NET templates and open-source foundations are well built, and for some projects one of them is the right answer. Whichever you pick, the trade is the same: the price is zero, and everything the template does not carry - and everything it does, from the day you fork it - is yours to build, test and maintain. This page is about that trade, not about any one project. Last updated September 29, 2026 ## What "free" usually means - **Architecture templates** - A clean, opinionated project structure with a sample feature and the platform's identity system wired in. The right first answer to "how should I structure this?" Everything above sign-in - permissions, tenants, an admin application - is yours to design. - **Starter kits** - Closer to an application: often roles and permissions, sometimes multi-tenancy and an admin console, usually on one front end and one database. How much is finished varies a lot from kit to kit, and so does who is maintaining it next year. - **Open-source frameworks with a startup template** - A framework that solves the infrastructure - tenancy, permissions, auditing, localization - with a small application on top. The plumbing is there; the screens, the SaaS layer and most of the security flows are left for you to build on it. We publish one of these ourselves: the free startup template of [ASP.NET Boilerplate](https://aspnetboilerplate.com), the framework ASP.NET Zero is built on. ASP.NET Zero is what the rest of the table below looks like when it is finished. Row by row ## Where the work lands Free templates differ, so the left column says what is typical and who carries it. Hold the one you are considering against the same rows. | Criterion | A free template or foundation (what is typical, and who carries it) | ASP.NET Zero (commercial, full source) | | --- | --- | --- | | What you start with | Anything from a folder structure to a working admin console, depending on the template | A finished application foundation: backend, three web UIs, a public website and a mobile app | | Sign-in and account security | Usually login and registration. Two-factor, lockout, password policies, SSO and LDAP are often yours to add and test | Two-factor, lockout, password policies, social logins, OpenID Connect, LDAP and Active Directory, ADFS, session management | | Authorization | Roles are common. Per-user permissions, organization units and impersonation are rarer | Roles, granular user permissions, organization units, user delegation, tenant and user impersonation | | Multi-tenancy | Missing in many; where present, check whether isolation is enforced for you or by convention | Single, per-tenant or hybrid databases; tenant isolation on every query; tenant sign-up and branding | | Editions, subscriptions, payments | Rarely included. The SaaS layer is usually yours to build | Editions, feature gating, subscriptions with trials, Stripe and PayPal, invoicing | | Admin application | From a sample page to basic user and role screens | Users, roles, tenants, editions, subscriptions, languages, settings, audit logs, organization units - in all three UIs | | Audit logging | Often timestamps on entities; a readable audit trail with a UI is usually yours | Audit log and entity change history, with UI | | Localization | Sometimes the framework support; a language management UI is rare | 11 languages and a language management UI | | Front ends and mobile | Typically one web UI; mobile is rare | Angular, React and MVC & jQuery on one backend, plus a .NET MAUI app | | Code generator | Rarely | Power Tools included: entity to UI, from your database or from scratch | | Upgrades | Once you fork it, every .NET release is yours to apply to your copy | Every .NET version since 2013, with a documented upgrade path for each | | Support | GitHub issues and the community, on their schedule | Support incidents included; forum since 2013 | | Source code | Yours | Yours: full source, no runtime fees, no per-user cost | | What it costs | Free to start; the rest in your team's time | $2,999 one time, up to 3 developers | Before you pick one ## Six questions to ask of a free template The README tells you what a template has. These tell you what you will be writing. - Multi-tenancy: is tenant isolation enforced on every query by the framework, or left to each developer to remember? - Permissions: can you grant one user one extra permission, or only put them in a role? - SaaS: are editions, feature limits, trials and payments there, or is billing a module name with nothing behind it? - Audit: does it record who changed what, including under impersonation, and can an administrator read it without a database query? - Maintenance: who has kept it current through the last three .NET major versions, and will they be there for the next one? - Tests: what ships with it, and does it cover the rows above or only the sample feature? What free costs ## The price is zero. The cost is the rows you carry. - Every row the template does not carry is a row your team writes, tests, and maintains against every .NET release. The build-vs-buy page puts weeks against each of them. - The rows that matter most in an enterprise sale - permissions, tenancy, audit, SSO - are the ones free templates most often leave out, because they are the hardest to do generically. - A free template's maintainer owes you nothing. That is fair, and it is also the difference between a GitHub issue and a support incident with a response time. - What makes a free template attractive, you get from ASP.NET Zero too: the full source code, no runtime fees, no per-user cost, and the freedom to change anything. [Build vs buy](https://aspnetzero.com/build-vs-buy) has the effort against each area and the numbers our customers published. The [feature list](https://aspnetzero.com/features) is the long form of the right-hand column. The honest part ## When a free template is the right call - A prototype, a proof of concept, or a learning project. A free template is the right starting shape, and you will learn more building the rest yourself. - An internal tool with one kind of user and no tenants. Most of the rows above do not apply. - A team that needs tenancy and permissions but is willing to build editions, billing and the admin screens itself, and has the time to. If you are building a multi-tenant SaaS product, or a line-of-business application that enterprise customers will evaluate, the rows above are your backlog. That is the case ASP.NET Zero exists for. Questions ## Frequently asked questions ### Is a free .NET template enough for a multi-tenant SaaS application? Usually not on its own. Free templates typically carry sign-in and registration, sometimes roles. Multi-tenancy, editions and subscriptions, per-user permissions, an audit trail with a UI and a complete admin application are usually left to your team to build, test and maintain against every .NET release. ### Is ASP.NET Zero open source? No. ASP.NET Zero is a commercial product, but the license includes the full source code, with no runtime fees and no per-user cost, and you can change anything. It is built on ASP.NET Boilerplate, the open-source framework from the same team, which has a free startup template of its own. ### What does ASP.NET Zero include that free templates usually leave out? Multi-tenancy with single, per-tenant or hybrid databases; editions, subscriptions with trials, and Stripe and PayPal payments; granular permissions, organization units and impersonation; an audit log and entity change history with a UI; the admin application in Angular, React and MVC; a .NET MAUI mobile app; and the Power Tools code generator. ### When is a free template the right choice? For a prototype, a proof of concept or a learning project; for an internal tool with one kind of user and no tenants; or for a team that needs tenancy and permissions but is willing to build editions, billing and the admin screens itself, and has the time to. ### How does the cost compare with a free template? A free template costs nothing to start; the rest is paid in your team's time. ASP.NET Zero costs $2,999 one time for a team of up to 3 developers: a perpetual license with the full source code, one year of updates, and no runtime fees or per-user cost. ## Check it against your own requirements - [Build vs buy](https://aspnetzero.com/build-vs-buy): what a foundation contains, what building it takes, and the customers' published numbers - [vs AI-generated boilerplate](https://aspnetzero.com/compare/ai-generated-boilerplate): why generating the foundation is not the same as verifying it - [Everything included](https://aspnetzero.com/features): the full feature list, so you can check it against your requirements - [Live demo](https://aspnetzero.com/demo): see the admin application before you decide anything - [Talk to an expert](https://aspnetzero.com/schedule-meeting): 30 minutes, free, and we will tell you if a free template is the better fit ## Free gets you started. *This gets you shipped.* Explore the live demo, or book 30 minutes with the team that maintains it. [Live Demo](https://aspnetzero.com/demo) [Talk to an Expert](https://aspnetzero.com/schedule-meeting) 30-day money-back guarantee