Sitefinity alternative for associations: Raytha open source .NET CMS

Progress Sitefinity is a commercial .NET digital experience platform with personalization, A/B testing, a managed cloud and enterprise support, sold through quote-based licenses. Raytha is a free, MIT-licensed .NET CMS you host yourself. For an association or nonprofit that mainly needs structured content (news, events, resources, directories), member sign-in and single sign-on with its AMS, Raytha covers the core without license fees.

Last reviewed October 2026 against Raytha 2.0.1 and Sitefinity 15.4.

Raytha vs Sitefinity at a glance

	Raytha	Progress Sitefinity
License	MIT, free	Commercial; domain- or server-based, perpetual or subscription, quote-based
Runtime	.NET 10 on Linux or Windows	CMS backend on .NET Framework 4.8 (Windows, IIS); ASP.NET Core or Next.js front ends
Database	PostgreSQL	SQL Server or Azure SQL
Hosting	Self-hosted: Docker or Railway	Self-hosted, or Sitefinity Cloud (managed on Azure)
Content model	Custom content types in the admin	Dynamic modules and built-in content types
Page building	Site pages built from widgets	Drag-and-drop page and form builder
Members and SSO	Public users, user groups, SAML and JWT SSO	Membership, external identity providers
Marketing tools	None built in	Personalization, A/B testing, Sitefinity Insight (paid)
Support	Community; consulting from Raytha	Vendor support included with licenses

A personal note on Sitefinity

In 2011 I joined NonprofitCMS, a web design firm that built sites for nonprofits and membership associations on WordPress, Drupal and Sitefinity. Many of those sites had thousands of content items. Sitefinity was popular with associations at the time because it was .NET, which matched the association management systems (AMS) many of them ran.

Two things stuck with me. First, performance: on the versions we used then, our large sites grew slow enough that we rebuilt parts of the storage layer. Second, integrations: almost every client needed single sign-on with an AMS or community platform such as iMIS, Netforum, Personify or Higher Logic, and each one was custom work. By the end, the main thing we used out of the box was the page builder. Those are my experiences with older versions, not a review of Sitefinity today, but they are why we built Raytha: a free, open source .NET CMS shaped around association-style sites and easy to integrate.

What Sitefinity does well today

Sitefinity 15.4 is a full DXP. It offers a WYSIWYG page and form builder, a decoupled ASP.NET Core renderer and Next.js support, personalization and A/B testing, Sitefinity Insight for customer data, an integration hub, and Sitefinity Cloud, a managed service on Azure. Licenses include a year of maintenance and support. For a larger organization with a marketing team that will use personalization and wants a vendor on the hook, that package has value.

Where Raytha fits for associations

No license fees. MIT-licensed, no per-seat or per-domain pricing.
Member sign-in included. Public users and user groups, email and password, emailed one-time codes, and SAML or JWT single sign-on. If your AMS can act as a SAML identity provider or issue a signed JWT, members can sign in with their AMS account.
Structured content. Model events, chapters, committees, resources, job postings or a member directory as content types, with list views and filters.
Members-only content. Templates can show content only to signed-in members or to specific user groups.
Modern, portable hosting. One .NET 10 container and PostgreSQL on Linux or Windows, deployable with Docker or Railway.
Integrations without plugins. A REST API, HMAC-signed webhooks and Raytha Functions (server-side JavaScript) for sync jobs and forms.

When to choose Sitefinity

You need personalization, A/B testing and marketing analytics in the CMS.
You want vendor support, an SLA and a managed cloud.
You have an existing Sitefinity investment and team, and the license cost is justified.
You are standardized on SQL Server and Windows hosting.

When to choose Raytha

License cost is a real constraint, as it is for most nonprofits.
Your site is mainly news, events, resources and member content.
You need member SSO with your AMS and are comfortable configuring SAML or JWT.
You want an open source codebase your team or partner can change.

Before you switch

Raytha has no built-in personalization, A/B testing, marketing automation or form builder (forms are built with templates and Raytha Functions), and no built-in multilingual content. Members-only content is enforced in templates rather than per-item permissions. Raytha does not ship ready-made connectors for specific AMS products; SSO works through standard SAML or JWT. There is no hosted Raytha service, though consulting is available.

FAQ

Is there a free, open source alternative to Sitefinity?

Yes. Raytha is a free, MIT-licensed .NET CMS. Umbraco, Orchard Core and DNN Platform are other open source .NET options.

How much does Sitefinity cost?

Progress does not publish list prices. Sitefinity is sold through quotes, with domain- or server-based licenses on perpetual or subscription terms, and Sitefinity Cloud priced by consumption.

Can Raytha connect to our association management system?

Raytha supports SAML 2.0 and JWT single sign-on for public users. If your AMS can act as a SAML identity provider or sign a JWT, members can sign in with their existing accounts. Data sync can use the REST API, webhooks or Raytha Functions.

What does Sitefinity run on?

Sitefinity 15.4's CMS backend requires .NET Framework 4.8 on Windows with IIS and SQL Server. Front ends can use the ASP.NET Core renderer or Next.js.

Related comparisons

Try Raytha

Raytha is free and MIT-licensed. Deploy it in a few minutes with the Railway template or Docker, following the quickstart. The platform overview lists what is in the box, and the source and release notes are on GitHub.

Raytha vs Sitefinity: an open source .NET CMS for associations