InboxKit is your all-in-one platform for building, managing, and scaling cold-email infrastructure.
It automates everything from domain provisioning and DNS setup to mailbox creation, warm-up, and sequencer integrations, so you can focus on running high-performing outbound campaigns — not managing the tech stack behind them.
With InboxKit, you can:
Buy or connect domains instantly — DNS (SPF, DKIM, DMARC, MX) configured automatically in the backend.
Create Google Workspace or Microsoft 365 mailboxes without manual setup.
Warm up your inboxes automatically to build reputation and improve deliverability.
Export mailboxes directly to outreach tools like Smartlead and Instantly with one click.
Monitor deliverability health through a single unified dashboard.
In short: InboxKit gives you production-ready domains and mailboxes in minutes — with zero technical setup.
Infrastructure That Just WorksEvery domain, mailbox, and DNS record is automatically configured on our backend. No more dealing with SPF/DKIM records, MX routing, or propagation delays manually — the system handles it all for you.
Deliverability, Not GuessworkInboxKit continuously optimizes warm-up schedules and mailbox reputation to keep your outreach out of spam and in the inbox. It’s designed for agencies, founders, and outbound teams that care about consistency and scale.
Seamless IntegrationsNative support for Smartlead, Instantly, and more ensures your sending infrastructure connects smoothly with your favourite sequencers. Export mailboxes in bulk, track statuses, and manage campaigns without leaving the dashboard.
Scale Without FrictionWhether you manage 10 or 10,000 mailboxes, InboxKit is built to scale.
From domain purchasing to mailbox lifecycle automation, every process is API-driven, fast, and repeatable.
Transparent Credits & PlansNo hidden fees — every domain, mailbox, and add-on is powered by a simple credit-based system or monthly plan.
Credits never expire, and plans like Professional, Agency, and Enterprise are designed to match your team’s sending volume and growth stage.
InboxKit is trusted by:
Cold-email agencies managing 100 + clients’ outreach.
Founders & growth teams building scalable outbound engines.
B2B marketers optimizing inbox placement and domain rotation.
Freelancers and consultants running smaller, high-quality campaigns.
