Heyo Email is a cold email sending platform for teams running high-volume outbound, built specifically around Microsoft Exchange mailboxes and priced by email volume rather than by the number of connected inboxes.
What is Heyo Email?
Heyo Email connects unlimited Microsoft Exchange sending accounts, warms them in the background, and aggregates every reply into a single Global Unibox. You import contacts as CSV, build multi-step sequences in a drag-and-drop campaign builder, and send from as many inboxes as your volume requires. It runs in the browser, exposes a REST API on higher tiers, and is made by Heyo, which also sells Heyo Infra for provisioning dedicated Exchange mailboxes.
What makes Heyo Email stand out?
- Unlimited sending accounts — plans are priced on email volume, not inbox count, so connecting dozens or hundreds of Exchange accounts adds no per-seat cost.
- Automatic warmup — every connected account is enrolled on connection; Heyo's peer-to-peer network detects messages landing in Junk, moves them to the Inbox, then auto-archives them to a hidden Exchange folder, reporting 98% saved from spam.
- Global Unibox — replies from every account and campaign arrive in one real-time feed, and responses are routed back out through the correct underlying address automatically.
- Campaign builder — drag-and-drop multi-step sequences with conditional logic, A/B testing, Spintax, dynamic variable injection, and automated daily ramp-up limits.
- Lead management — import thousands of contacts via CSV, map custom data fields, and organize them into dynamic Lead Lists.
- Compliance tooling — tracking subdomains, branded unsubscribe pages, and a global Do Not Contact (DNC) list that blocks accidental sends; an unsubscribe link is appended to every campaign.
- Microsoft Exchange specialization — one-click OAuth connection of Exchange accounts with automatic DNS (SPF, DKIM, DMARC) verification.
- Agency controls — a 100% whitelabel dashboard, custom CNAME domain, custom colors and logo, unlimited sub-workspaces, wholesale pricing, and webhooks.
Who should use Heyo Email?
- Outbound sales teams: run multi-step cold sequences across many Exchange mailboxes while reading and answering every reply in one unibox.
- Cold email agencies: manage client workspaces from a whitelabel dashboard with unlimited sub-workspaces and wholesale pricing.
- Founders and lean growth teams: start on the Starter plan with unlimited sending accounts and 50,000 emails per month.
- Developers: use the Growth plan's REST API and API keys to push leads or trigger campaigns from their own tools.
What can you do with Heyo Email?
- Scale sending volume cheaply: pair Heyo with Heyo Infra Exchange mailboxes at roughly $0.34 to $0.44 per month all-in, rather than $5 to $7 per inbox on Google Workspace or Outlook.
- Protect domain reputation: run background warmup plus daily ramp-up limits before the first campaign goes live.
- Handle replies at volume: aggregate hundreds of connected inboxes into one feed and reply without switching accounts.
- Estimate savings: the on-site calculator compares a traditional setup (50 accounts, 25,000 monthly sends, 10,000 stored leads) at $349/mo against Heyo at $48/mo, a $301 monthly difference.
How does Heyo Email work?
You connect a Microsoft account through verified OAuth, and Heyo handles DNS verification and mailbox push in seconds via Heyo Infra. Contacts are imported from CSV into Lead Lists, and campaigns run as drag-and-drop sequences with wait steps and follow-ups. Heyo recommends letting Exchange accounts warm up for at least 14 days before launching the first active campaign.
Pricing
Heyo Email is a paid subscription with three tiers. Starter costs $39/mo (1 workspace, 1 user, unlimited sending accounts, automated warmup, 50,000 emails and 50,000 contacts per month, Global Unibox, campaign builder, DNC management). Growth costs $79/mo (up to 3 workspaces and 3 users, 200,000 emails and 200,000 contacts per month, plus a developer REST API and API keys). Agency costs $49/mo (whitelabel dashboard, custom CNAME domain, custom colors and logo, unlimited sub-workspaces, wholesale pricing, REST API and webhooks).
FAQ
Does Heyo Email support Google accounts?
No. Heyo is built exclusively for Microsoft Exchange, and there is no Google Workspace support. The company's stated reason is cost and setup simplicity at scale, since Exchange mailboxes can be created for cents while Google Workspace inboxes typically run $4 to $7 per month.
How long should accounts warm up before sending?
Heyo recommends a minimum of 14 days of warmup on Microsoft Exchange accounts before launching the first active campaign. Warmup continues running in the background afterward to protect sender reputation while campaigns are live.
What does "unlimited sending accounts" mean?
You can connect as many sending accounts as you want at no extra cost. Your plan is determined by monthly email volume and contact storage, not by how many inboxes you connect to the workspace.
Are unsubscribe links required?
Yes. Every campaign automatically includes a compliant unsubscribe link. Heyo also supports custom branded unsubscribe pages, tracking subdomains, and a global Do Not Contact list to support CAN-SPAM and GDPR alignment.
