Digital content today has to meet more and more requirements. Think WCAG guidelines, digital accessibility, the European Accessibility Act and new legislation such as the EU AI Act. At the same time, organizations expect content to reinforce their brand identity, be consistent in tone of voice and align with internal style guides. Many organizations therefore compare Textmetrics and Siteimprove. While both tools contribute to better Web sites, they differ fundamentally in approach and purpose.
Difference in focus: controlling versus directing
Siteimprove is best known as an accessibility checker for Web sites. The tool analyzes existing pages and provides insight into accessibility issues, SEO and user experience. That makes Siteimprove suitable for website monitoring and reporting, but improvements often follow only after publication.
Textmetrics focuses precisely on the writing process itself. Content is checked in real time for WCAG 2.1 and WCAG 2.2, readability and structure. This makes content immediately accessible, without having to make corrections afterwards. In addition, Textmetrics actively manages writing style, tone of voice and brand consistency during content creation.
WCAG, digital accessibility and the European Accessibility Act
The European Accessibility Act 2025 requires organizations to make digital content demonstrably accessible. Textmetrics applies WCAG guidelines directly while writing. This promotes structural website accessibility and assists in the creation of an accessibility statement.
Siteimprove provides valuable auditing and reporting, but is primarily reactive. For organizations that want to ensure compliance, rather than just audit, Textmetrics offers more direction. When accessibility is part of the daily writing process, it creates structural compliance rather than retrospective correction.
Inclusive language and bias
Inclusive communication is becoming increasingly important. Textmetrics actively supports inclusive language, recognizes bias and helps with gender-neutral and comprehensible writing. This is relevant for public organizations, HR teams and brands that take inclusivity seriously. Siteimprove does not have specific functionality for this.
Inclusiveness is not only a compliance issue here, but also a conscious brand choice. The way you write determines how accessible and recognizable your brand is to different audiences.
Brand voice, style guides, and customization
Whereas many tools use generic guidelines, Textmetrics distinguishes itself through complete custom design. For each client, brand voice, style guide and writing guide are tailored specifically to the organization, brand and target audience.
Corporate communications, marketing, HR and web editors therefore all work from the same established brand identity. This ensures consistent content, regardless of who writes or through which channel is published. Siteimprove offers limited support in this area and focuses mainly on technical quality measurements.
AI governance and future legislation
With the rise of GenAI and LLMs, the need for AI control and AI governance frameworks is growing. Textmetrics helps organizations keep a grip on AI-generated content and supports compliance with the EU AI Act. This prepares the platform for future regulations around AI and content quality.
Important here is that AI output is not only legally correct, but also remains consistent with the established brand style and communication rules. Textmetrics secures this by connecting AI and brand governance.
Siteimprove is strong in monitoring and reporting. Textmetrics goes a step further and combines content quality, WCAG compliance, inclusivity, brand identity, custom style guides and AI governance in one platform.
For organizations that want to drive rather than recover content and are serious about their brand consistency, Textmetrics is often the most future-proof choice.