“### 3. lemlist — Best for multichannel campaigns”
“Consider lemlist if your agency combines:”
“It supports inbox rotation, although rotation shouldn't be mistaken for permission to increase overall sending volume.”
“### 2. Instantly — Best alternative”
“- Multiple sending accounts.”
“- Automated warm-up.”
“- Inbox placement testing.”
“- Bounce monitoring.”
“- Separate client workspaces.”
“- Centralised inbox management.”
“- Campaign sending limits.”
“One important distinction: Instantly's workspaces have separate campaigns, contacts and analytics, but each workspace requires its own subscription.”
“Its inbox placement functionality is also worth evaluating if deliverability reporting is important to your agency.”
“One important distinction: Instantly's workspaces have separate campaigns, contacts and analytics, but each workspace requires its own subscription.”
“### 1. Smartlead — My first choice”
“- Dedicated client workspaces.”
“- Centralised inbox management.”
“- Multiple sending accounts.”
“- Automated email warm-up functionality.”
“- Campaign-level sending controls.”
“- API integrations for agency automation.”
“- White-label client portals.”
“Why it stands out: You can manage several clients without mixing their campaigns, contacts and reporting.”
“Smartlead also offers client workspaces as an agency-oriented feature, with white-labelling available as an add-on.”
“Email infrastructure | Google Workspace / Microsoft 365”
“Email infrastructure | Google Workspace / Microsoft 365”