White-labelling lets an agency present the sending platform as its own: custom domain, its logo, client logins that never mention the vendor. Agencies care because clients who see "Instantly" in the URL ask why they're paying a retainer, and because client logins replace weekly screenshot reports.
Lead-gen agencies are the core buyer of volume cold-email tools, so white-label is where the volume players fight. Each has made a different trade-off.
How it works
The agency points a subdomain (e.g. app.agency.com) at the vendor by CNAME, uploads branding, and invites clients with scoped permissions: see campaigns, see replies, see analytics, maybe edit. Underneath, each client is a workspace or sub-account (Workspaces, roles and SSO). Billing usually stays with the agency.
Who does it well
| Player | White-label offer (as of Oct 2026) | Price |
|---|---|---|
| Smartlead | Client workspaces with agency branding | $29–39/mo per client workspace (pricing.md vs pricing page), Pro ($94) and up; 3 included on Unlimited Prime ($379) (pricing, pricing.md) |
| Instantly | Branded agency portal via CNAME to agency.itrackly.com; share Campaigns, Unibox, Analytics, CRM, Blocklist; unlimited clients | Included on Hyper Growth ($97) and Light Speed ($358) only (help, July 2026) |
| EmailBison | Unlimited isolated workspaces; Admin, Editor and Reseller roles; single-tenant clusters and dedicated VPCs (emailbison.com) | $599/mo for 500,000 sends, no per-seat or per-workspace fees (pricing) |
| Woodpecker | Agency Panel (separate prospect DBs, global blacklist, client view-only) + White Label | $27/mo + $5/mo per active client (pricing) |
| PlusVibe | White-label + client workspaces | Agency plan, $497/mo and up (pricing) |
| Saleshandy | White-label/agency portal | Scale plan ($189/mo) only; full white-label on Enterprise (pricing) |
| Reply.io | Agency Core: unlimited clients and users | From $210/mo (pricing); branding depth not verified |
| lemlist, Apollo.io, Outreach, HubSpot Sequences | No white-label on public pricing | — |
EmailBison's homepage lists a "Reseller" role and isolated workspaces but does not describe custom-domain branding, and emailbison.com/white-label returned 404 in October 2026. Its white-label depth is unverified.
Where implementations differ
- Scoping. Instantly's portal has a hard limit: "Clients with Campaigns access will be able to see all campaigns in the workspace, there's no way to restrict their access to only certain campaigns." Running several branded portals "require[s] separate workspaces and subscriptions" (Instantly help). An agency with 20 clients either runs 20 subscriptions or lets clients see each other's work.
- Pricing per client. Smartlead and Woodpecker tax growth: 20 clients cost $580/mo in Smartlead workspace fees on top of the plan, or $640/mo in Woodpecker panel and white-label fees. EmailBison and Instantly don't charge per client.
- Isolation. EmailBison sells infrastructure isolation (single-tenant clusters, dedicated IPs) as part of the agency pitch; the others isolate data per workspace on shared infrastructure.
- Invites. Instantly sends no automatic invitation emails, "to maintain white-label anonymity" — agencies distribute links by hand.
- AI inside the portal. None of the vendors documents a client-facing approval queue for AI replies, which is what an agency would want before letting an agent speak for a client (AI reply agent).
Risks and abuse
White-label also hides who is really sending. Mailbox providers and regulators look through branding to the infrastructure, and a reseller network can let bad actors rent a clean brand. Vendors carry Platform liability: what the sequencer itself risks for what resellers send under provider acceptable-use policies. For an EU vendor, every reseller's client is another controller in the GDPR chain.
What this means for an entrant
- Agencies are the buyer most willing to switch; a better white-label is a direct wedge into Lead-gen agencies.
- Price flat, not per client — Smartlead's $29–39/workspace and Woodpecker's $32/client are the numbers to undercut.
- Fix scoping: per-client campaign, inbox, reply and analytics visibility in one account, with no extra subscription.
- Add the agency jobs nobody covers: client rebilling (usage passed through with markup), client-facing reply approval, branded weekly reports.
- Keep AUP enforcement per reseller with suspension controls; a white-label platform that hosts spammers loses its sending reputation for everyone (Reputation and blocklists).