Note: AMIs are only a rough estimate of the number of active Thunderbird installations each month, they are not a count of users. Learn More

Weekly AMI Estimates

Note: ADIs are only a rough estimate of the number of active Thunderbird installations each day, they are not a count of users. Learn More

Daily ADI Estimates

Note: ADIs are only a rough estimate of the number of active Thunderbird installations each day, they are not a count of users. Learn More

Note: These stats do not include Lightning.