Client portal softwarefor cold email agencies.
Our ClientBox is a first of its kind in the cold email market, powering fully customisable client portal software for cold email agencies.
No credit card required.
Trusted by some of the world's top go-to-market teams








The basics
What is client portal software?
Client portal software gives each of your clients a secure, branded place to log in and see the work you are doing for them. For a cold email agency that means campaign results, positive replies and reporting, all in one place.
ClientBox is HotHawk's take, built for agencies from the ground up. It runs on your own domain under your brand, gives every client their own workspace, and lets you decide exactly what each one sees. Unlimited workspaces and white label come included, not as a per-client add-on.
What Acme Co can see
You set this per client. They only ever see what you switch on.
Standout features
Built for serious outbound agencies.
Blocklist Management
Let clients upload their blocklist of email addresses and domains, and we add them straight to the sequencer blocklist automatically.
Just Positive Replies
Turn access to each type of reply on or off by label. Show clients the full picture, or just the positive replies.
Customisable Client Dashboard
Build a detailed or top-level dashboard with exactly the stats you want to share.
LinkedIn Inbox powered by HeyReach
Connect HeyReach with our native integration and show clients every reply to your LinkedIn outreach, in the same client portal.
The portal
What your clients log in to.

Your domain, your logo.
Clients log in to your portal on your own domain, branded as you, and never see HotHawk.

Pick a theme that matches your branding.
Match the portal branding to your own agency so clients think this is your own internal software.

A shared opportunities board.
Create sales opportunities from positive replies and track them on a shared CRM board with your clients.

Build their reporting dashboard.
Switch reporting sections on or off per client and give them a live dashboard.
Everything in ClientBox
More than a white label email client.
All of the aspects of your work that you need to share with a client can be turned on or off at the click of a button in ClientBox.
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.yoursite.com.
Custom login and signup screens
Design the pages so they look like your brand on every engagement.
Per-client visibility
Your team works from HotHawk and jumps between workspaces, while each client only sees their own.
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.
For agencies
ClientBox is the retention secret.
Agencies that use our ClientBox report better client retention and less negative client communication, as ClientBox helps them share the full picture with their customers.
See HotHawk for agenciesClient portal FAQs
What is client portal software?
Client portal software gives each of your clients a secure, branded place to log in and see the work you are doing for them. For a cold email agency that means campaign results, positive replies and reporting, all in one portal on your own domain.
How much does a client portal cost with HotHawk?
ClientBox comes with full white label, which is included on our Scale and Infra plans. Both give you unlimited client workspaces, so once you are on Scale or Infra, adding another client never adds to your bill.
Can clients log in and sign up themselves?
Yes. Send a self-signup link and your client sets up their own access, so onboarding a new account takes minutes rather than a back and forth.
Can I control what each client sees?
Completely. You choose which replies and which reporting sections each client can see, so every portal shows exactly what you want it to.
Is a client portal a CRM?
No. A CRM stores your contacts and deals; a client portal is the branded window your clients look through to see results. ClientBox is the portal, sitting on top of the cold email work you run in HotHawk.
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.