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About NimbusOS
We're building the infrastructure layer that lets cold email agencies scale without the operational headaches
Our Mission
NimbusOS exists because outbound agencies shouldn't need a full-time ops person just to manage domains, DNS records, and inbox provisioning. We automate the entire cold email infrastructure layer so agencies can focus on what they do best - running campaigns and growing their clients' pipelines.
Built by operators who ran agencies ourselves, NimbusOS is the tool we wished existed when we were manually managing 200+ domains across 15 clients on Instantly and Smartlead.
88,917
Contacts in the Pipeline
121
Inboxes Managed
<4min
Avg Client Onboarding