Guide
Plans and limits
Auditing is free and always will be. What the plans differ on is storage — how many results you keep and for how long — plus a couple of features that only make sense once a site is being watched continuously.
Last reviewed: 9 August 2026
What is never limited
The extension is free, unmetered, and needs no account. Every rule, every page, as often as you like. Nothing you can do in the panel moves behind a plan.
Plans apply only to the cloud dashboard — the place results are kept. You are paying for history, not for scanning.
The limits
Stored audits. Free keeps up to 200; Pro keeps up to 50,000. A new audit that would take you past the cap is refused, and the response says so rather than silently discarding an older one.
History. Free keeps 30 days and Pro keeps two years. Audits older than the window are removed.
API keys. Free may hold 3 active keys; Pro 20. More than one is genuinely useful — a key per repository means you can revoke the one that leaked without breaking anything else. See sending audits from CI.
Ingest rate. Posts to the API are limited per account per minute: 60 on Free, 300 on Pro. Going over returns a 429 telling you how long to wait, and the endpoint is idempotent, so a retry cannot duplicate an audit.
Authenticated monitoring. Signing in before a scan — the credential vault and sign-in flows described in monitoring a page behind a login — is Pro only. This is the one genuine feature difference rather than a number.
Monitors themselves are not Pro-only. On Free a monitor keeps running on its chosen schedule; it simply audits the page as a signed-out visitor sees it.
Reaching a limit
The rule is that Mend refuses cleanly and tells you why, rather than degrading quietly. Hitting the audit cap returns an explicit error naming the cap. Hitting the rate limit returns a 429 with a wait time. Neither loses data you had already stored.
The one place volume degrades instead of failing is inside a single audit: a run carrying more than 1,000 issues is trimmed to the most severe 1,000 and flagged partial, because most of a very broken page is more useful than none of it. That behaviour is covered in the API guide.
Upgrading, and what happens if you stop
Pro is $9 a month or $90 a year. Upgrade and manage billing from your Account page; current prices and the full comparison are on pricing.
Cancelling leaves you on Pro until the end of the period you have already paid for, then the account returns to Free. A failed payment does not cut you off immediately either — there is a grace period of about a week for the card to be fixed before entitlements drop.
On returning to Free, the Free limits apply again: history narrows to the last 30 days and the most recent 200 audits, and authenticated monitors keep running without signing in, auditing the signed-out view instead.
If you want a copy of everything before a downgrade takes effect, export it — exporting and deleting your data covers the one-click JSON download, which is not limited by plan.