Cold email software builtfor outreach agencies.
Give your clients excellent deliverability, catch every positive reply with the best master inbox in the market, and deliver it all in a white-label client portal.
No credit card required.
The cold email agencies scaling outbound on HotHawk
Why agencies love ClientBox
Manage every client from one tool.
Unlimited client workspaces and full white-label, included on our Scale and Infra plans. No per-client add-ons, so growing your client base never grows your bill.
Unlimited client workspaces
Every client gets their own workspace, included. Not a per-client add-on, so adding a client never adds to your bill.
Blocklist management
Clients upload their blocklist of email addresses and domains, and we add them to the blocklist automatically.
LinkedIn inbox
Connect HeyReach and show clients every reply to your LinkedIn outreach, in the same portal.
White-label signup links
Generate a signup link per client that lives on your own custom domain.
Custom domain
Put ClientBox on your own domain, like inbox.youragency.com.
Per-client visibility
Your team works from HotHawk and switches between workspaces, while each client only sees their own.
Only on HotHawk
The parts your current tool is missing.
Built-in controls that keep every client's campaigns running, so your team stays on the replies.
Evergreen Campaigns
Create campaigns that never turn off, always waiting to receive new leads via UI or API.
Sending Holidays
Attach planned sending break schedules to campaigns based on local or ICP national holidays.
Out of Office Management
Manage OOO replies from the Master Inbox. Auto re-add to a campaign now, later, or to a different campaign.
Deliverability Best Practices
Open and link tracking are off, for everyone. We enforce deliverability best practices out of the box.
The client portal
What your clients log in to.
Branded as your own business, on your own domain. Clients see the wins and the reporting you choose to share, and never see HotHawk.
Your domain, your logo.
ClientBox runs on your own domain, branded as you. Your clients never see HotHawk.
Pick a theme.
Match the portal to each client in a couple of clicks with ready-made themes.
Show only the positive replies.
Choose exactly what each client sees. Surface the wins, keep the noise out.
Build their reporting dashboard.
Customise a live reporting dashboard per client, so results are always one link away.
Better results for clients
More positive replies for every client you manage.
Excellent deliverability for every client.
Warmup on Google and Microsoft mailboxes, with deliverability best practices enforced by default on every client account.
The best master inbox in cold email.
Every positive reply surfaced the moment it lands, so your team replies first and books more meetings for clients.
Never miss another positive reply.
We catch the forwarded and CC'd replies a basic sequencer inbox drops on the floor. Every one a client could close.
Switching is the easy part.
Move your clients over via the MCP server, the API or ask us for help. Mailbox migration is a lot easier than you think, most providers will bulk upload inside HotHawk for you and if not, we have bulk upload tools you can use.
Send cold emails that get delivered.Never miss a positive reply.
Serious deliverability paired with the best reply management in the market.
No credit card required.