Customer service software firm Zendesk is laying off around 440 employees less than seven months after its last layoff round. The cut includes dozens of managers at the San Francisco-based company.

Home Depot (HD) uses it in its 2,200 customer contact centers. Nordstrom (JWN) has been using it as a foundation for a concierge service. Competitors include Plivo, Nexmo, and Sinch, with an S.