Early Access May 13, 2026

InkCMS 10.1.5 — Early Access is here.

Early Access release

InkCMS 10.1.5 is the first Early Access release. The software is feature-complete and being used in production. Sign up to start a subscription via self-serve checkout, or contact us if you'd prefer a hand-onboarded setup.

Today we're shipping the 10.1.5 release of InkCMS — the .NET 10 CMS we built because we kept watching teams fight WordPress plugins, pay for headless platforms they didn't need, and end up with content trapped in a database they couldn't grep. It's source-available under a commercial subscription license, runs on your server, and is designed from the storage layer up to let Claude do the heavy authoring work.

Two AI surfaces. One filesystem. No database. No plugin economy. The CMS your developers wanted and your marketers can actually use.

The release

What's in 10.1.5

Filesystem storage. Every page is a markdown file with YAML frontmatter, sitting in content/production/. Want to diff a change? git diff. Want to roll back? git revert. Want to move environments? rsync. There's no SQL anywhere in the stack.

Two AI surfaces. The admin chat panel lets editors describe changes in plain English; the agent proposes edits as reviewable diffs and the human clicks Apply. The visitor-facing Advisor is a sticky chat banner that answers questions about your site with citations to real pages — server-side URL safety, rate limits, and per-question cost telemetry included.

Bring your own AI key. Anthropic Claude, Google Gemini, OpenAI GPT — pick a provider, paste a key, pay them directly. We never see your content and we don't mark up your tokens. At Gemini Flash rates, the Advisor costs between $0.0001 and $0.001 per visitor question.

Staging-first writes. Every change — human or agent — lands in staging first. You review the diff, you publish. Full audit trail. No one ships unreviewed copy to production, including the AI.

Customization in C# and Razor. If you're a .NET shop, InkCMS sits inside the IDE your developers already have open. Templates are Razor. Styles are CSS. Logic is C#. No PHP, no Node toolchain, no proprietary designer tool.

The landscape

What it replaces

The CMS market settled into three uncomfortable shapes. WordPress, with a plugin economy that's also a CVE economy. Headless platforms like Contentful and Sanity, which charge you $300+ a month for content modeling features most sites don't use. And page builders like Squarespace and Webflow, which are pleasant until your design needs something the template can't do.

InkCMS doesn't try to beat any of them on feature count. It picks a different shape: content in git, customization in code, AI as the senior editor. If that shape fits your team, the rest of the comparison is detail.

The numbers

Pricing, briefly

Five tiers, every feature included on every tier. Starter is $25/mo for up to 10 pages. XL is $500/mo for 1,000+ pages. Localhost installs are always unlimited and always free. There's a full breakdown on the pricing page and an honest comparison with the CMSs you're probably evaluating against.

Get going

Where to start

If you're a developer: clone the repo, dotnet run, and the install screen will walk you through bootstrapping an admin user and pasting your AI key. If you're an operator: get in touch and we'll help you scope a deployment. Either way, the first page you'll edit is the one you're already reading — and you'll edit it by asking Claude to change it.