The Mailreef alternative, built for deliverability.
Same goal - inboxes that land - with automated provisioning across three real providers instead of a single dedicated SMTP server.
Mailreef runs everything on a single dedicated SMTP server and IP per customer. That gives you tight control but no spread across real mailbox providers, and no built-in warmup, so a reputation dip on that one server has nowhere to fall back to.
Cladiant provisions real Google Workspace, Microsoft 365, and Azure Entra mailboxes across three providers in one order, with DNS and authentication written and verified before anything sends. You diversify by design instead of betting a campaign on one IP.
Cladiant vs Mailreef
| RecommendedCladiant | Mailreef | |
|---|---|---|
| Providers | Google Workspace, Microsoft 365 & Azure Entra | Its own dedicated SMTP servers only, no Google, Microsoft, or Azure accounts |
| Provisioning | Fully automated - ~6 hours per 100-mailbox batch | Automated, but entry is application-gated |
| Isolation | Dedicated Azure tenant per domain - never shared pools | One dedicated server and IP per customer, no provider diversity to fall back on |
| Sequencer handoff | Direct OAuth into 11+ senders - no CSV exports | SMTP/IMAP credentials, no OAuth |
| Billing | Month-to-month - cancel anytime, transparent per-mailbox rates | Varies |
Mailreefis a trademark of its respective owner. Comparison reflects Cladiant's capabilities; competitor offerings vary and may change.
What you actually get with Cladiant
Three real providers, one order
Diversify across Google Workspace, Microsoft 365, and Azure Entra in a single checkout - real enterprise accounts, not a grey-market SMTP relay.
Automated, not hand-built
No virtual assistants configuring domains by hand. DNS, SPF, DKIM, and DMARC are written and verified on every domain before a mailbox sends.
Dedicated tenants on Azure
Every Azure domain sits in its own tenant. Your reputation is never tied to someone else's sending in a shared pool.
Straight into your sequencer
We OAuth your mailboxes into Smartlead, Instantly, Salesforge, and more the moment provisioning completes. No exports, no copy-paste.
24/7 human support
Reach the team any time over email, Slack, or WhatsApp - real people who know your setup, not a ticket queue that replies next week.
Automations built for top-notch deliverability
We provide n8n automations that keep you ahead of deliverability. The moment a domain or mailbox gets affected, it is pulled from your campaigns and sending and moved straight to warmup - so one bad inbox never drags down the rest of your outreach.
Mailreef or Cladiant?
Stay with Mailreef if
You want full control of a single dedicated SMTP server and IP, you are comfortable running warmup and DNS yourself, and provider diversity is not a priority.
Choose Cladiant if
You want to spread risk across real Google, Microsoft, and Azure mailboxes, hand off over OAuth, and let deliverability monitoring pull a bad inbox before it takes the campaign down.
Moving from Mailreef, with zero downtime
Cladiant vs Mailreef, answered
Is Cladiant a good Mailreef alternative?
Yes, if you want provider diversity instead of a single SMTP server. Mailreef runs everything on one dedicated server and IP per customer; Cladiant provisions real Google Workspace, Microsoft 365, and Azure Entra mailboxes across three providers so a reputation dip has somewhere to fall back to.
What is the main difference between Cladiant and Mailreef?
Infrastructure model. Mailreef is dedicated SMTP with SMTP/IMAP credentials and no OAuth. Cladiant is real enterprise mailboxes on Google, Microsoft, and dedicated Azure Entra tenants, handed to your sequencer over OAuth.
Does Mailreef use Google Workspace or Microsoft 365?
No. Mailreef sends from its own dedicated SMTP servers rather than Google or Microsoft accounts. Cladiant provisions real Google Workspace and Microsoft 365 mailboxes alongside Azure Entra.
Can I switch from Mailreef to Cladiant without downtime?
Yes. Cladiant provisions your new mailboxes in parallel while Mailreef keeps running, connects them to your sequencer over OAuth, and lets you shift volume across at your own pace.
Ready to leave Mailreef behind?
One order. One invoice. Mailboxes provisioned across three providers and pushed straight into your sequencer.