SaaS custom domains
Issue and renew certificates for customer-owned hostnames without embedding ACME in your multi-tenant app.
The problem
SaaS products that offer vanity domains need a certificate for every customer hostname. Running ACME inside the product couples deploys to CA rate limits and challenge plumbing.
The workflow
When a customer adds app.customer.com, your backend creates a domain and a certificate order. You complete DNS-01 or HTTP-01, then install the PEM on your edge. Renewals continue through webhooks.
Isolation
Each tenant in sslcertificates.io is an organization. API keys cannot read another organization’s certificates.