If you encounter a quota limit error when trying to add a new OTTO site — even though your OTTO slots appear available — the most likely cause is that your Site Auditor Projects are already using slots from the same shared quota pool. This article explains how the quota system works and how to free up space so you can activate new OTTO sites.
Site Auditor Projects and OTTO Sites do not have separate quotas. They draw from the same pool of slots included in your subscription plan. This means:
Every active Site Auditor Project occupies one slot in your quota.
Every active OTTO Site also occupies one slot in the same quota.
The total number of slots available is determined by your current plan, regardless of whether those slots are used by Site Auditor Projects, OTTO Sites, or a combination of both.
For example, if your plan includes 10 slots and you have 8 active Site Auditor Projects, only 2 slots remain available for OTTO Sites — even if you have never activated a single OTTO site before.
The quota limit error appears when the combined total of your active Site Auditor Projects and OTTO Sites equals or exceeds your plan's slot limit. The platform checks the full shared pool before allowing a new site to be added, so an apparent availability of OTTO-specific slots can be misleading if Site Auditor Projects have already consumed that space.
To free up quota slots and successfully add your OTTO site, you will need to reduce the number of active sites currently consuming slots from your shared pool. Here is how to approach this:
Review your currently active Site Auditor Projects and OTTO Sites to identify any that are no longer needed or are lower priority.
Remove or deactivate any projects or sites that are inactive so that their slots are returned to your shared pool.
Once you have freed up at least one slot, attempt to add your new OTTO site again.
Audit regularly: Periodically review your active Site Auditor Projects and OTTO Sites to ensure you are only using slots for domains that are actively being worked on.
Remove unused projects: If a domain is no longer in active use, removing it from your Site Auditor Projects or OTTO Sites will return that slot to your shared quota pool.
Plan ahead when onboarding new clients: Before adding a new OTTO site, check your current slot usage across both Site Auditor Projects and OTTO Sites to confirm a slot is available.
If you need further assistance, open the chat widget in the bottom-right corner of the platform and type human teammate to be connected with a member of our team.