Accessio vs Siteimprove: Remediation vs Monitoring Dashboards

Siteimprove is the most recognised name in accessibility monitoring. It scans your site on a schedule, assigns severity scores to findings, and surfaces them in a dashboard alongside SEO, brand compliance, and analytics metrics. It does not fix anything. Accessio is the opposite: a remediation-first product that ships PRs to your repository. This guide covers how the two differ, when Siteimprove makes sense, and when it is the wrong layer of the stack.

What each product actually does

Siteimprove crawls your site and runs a rule engine against the crawled HTML. The findings go into a dashboard with severity labels, trend charts, and task-assignment features. Enterprise customers use the platform as a single pane of glass across marketing, legal, and engineering stakeholders.

Accessio scans the same sites and opens pull requests that contain the actual fix. Alt attribute added. <label> association corrected. Color-contrast CSS variable adjusted. The PR lands in your repository; your reviewers approve or reject; the fix ships on the next deploy.

The category difference

This comparison is less apples-to-apples than the other vendor comparisons on this site. Siteimprove is a monitoring platform; Accessio is a remediation tool. Many customers use both — Siteimprove for reporting to the executive team, Accessio for fixing the issues Siteimprove flags. The question is usually not "which one" but "do we need the monitoring dashboard at all once remediation is automated?"

Our view: if engineering is the bottleneck, Accessio shortens the cycle because the dashboard finding and the fix are the same artifact. If the bottleneck is stakeholder alignment across marketing, legal, and engineering, Siteimprove continues to provide value as a shared reporting surface.

Pricing

Siteimprove sells through an annual contract, typical range 20,000 to 100,000 USD per year depending on page volume, product bundle (accessibility, SEO, analytics, brand), and number of user seats. Procurement cycles are 2-4 months.

Accessio is usage-based: 0 USD for the first 50 pages per month, metered after that. A 10,000-page site pays around 89 USD per month. A 100,000-page site pays around 420 USD per month. No annual minimums.

Developer experience

Siteimprove's developer integrations are report-export and webhook-style. You can surface findings in CI via the API, but nothing in the product is optimised for the PR workflow — findings are a dashboard concern, not a code concern.

Accessio's GitHub App installs in one click and opens its first PR in 15 minutes. Every finding that can be defensibly auto-remediated is a PR. Findings that need human judgment are reported in the PR body with links to the W3C WCAG 2.2 success criterion that applies.

VPAT and EAA reporting

Siteimprove's reporting layer is excellent for external stakeholders. VPAT exports, EN 301 549 mapping, and stakeholder-ready summaries are strong. Accessio generates equivalent exports from the same scan data but the polish is less.

For a public-sector buyer who is handing reports to a regulator quarterly, Siteimprove still has a polish advantage. For an engineering-led organisation that cares more about the fix landing than the chart being pretty, Accessio wins.

When Siteimprove is the right pick

If your reporting audience is a compliance committee, a regulator, or a board, the Siteimprove dashboard remains valuable. The right architecture in many cases is Accessio for the fix + Siteimprove for the report. The combined cost is usually lower than Siteimprove alone because the volume of manual remediation work drops sharply.

Migration path

Most teams do not replace Siteimprove with Accessio. They install Accessio alongside it, watch the issue count drop, and renegotiate the Siteimprove contract downward at renewal once most monitoring value has shifted left to the PR workflow. Budget savings flow to a VPAT refresh or additional Accessio seats. Start at pricing and see the related article for the monitoring-vs-services comparison.

The bottom line

Monitoring without remediation is expensive to maintain. Remediation in a pull request is the modern default.