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vsInboxKit vs Mailscale (Mailbloom): Real Accounts vs Private Servers (2026)
Mailbloom (mailbloom.com) sells its own private email servers at a flat $299 per month per server, with up to 200 mailboxes per server and fresh, dedicated IP addresses per the provider. Mailbloom advertises a Trustpilot rating of 4.8 on its homepage; we were unable to retrieve the Trustpilot profile directly to independently verify the score and review count at the publication date. InboxKit sells real Google Workspace, Microsoft 365, and Azure accounts on dedicated US IPs starting at $39/month for 10 mailboxes, with InfraGuard available as a monitoring add-on (first month free, then a paid add-on per the InboxKit pricing page). Mailscale and Mailbloom are sometimes referenced together in the same provider conversation; we could not independently confirm the timeline or details of any rebrand. Both can land in the inbox; the deciding factor is almost always account type and volume, not headline price.
Mailscale (Mailbloom) homepage as of May 2026
Our Summary
Mailbloom (mailbloom.com) is positioned by the provider as "#1 dedicated cold email infrastructure, private servers & IPs." The pitch is a clean inversion of the shared-inbox model: instead of renting mailboxes on infrastructure shared with thousands of senders, the provider says you get your own private email server with fresh IP addresses no one else sends from. We could not independently verify reputation isolation in production.
The core marketing argument is reputation isolation. On shared providers, one bad neighbor can drag deliverability down. A dedicated server, per Mailbloom, makes your reputation entirely your own. Mailbloom advertises customer screening (saying it rejects spammers to protect the platform), automated DNS, 24/7 monitoring, and fast human support. The Trustpilot 4.8 figure appears on the Mailbloom homepage as of the publication date; we attempted to verify directly with Trustpilot and were unable to retrieve the profile at the time of writing.
Mailbloom's published commercial model is flat per server: $299/month for one private email server with up to 200 mailboxes, no per-mailbox fee, no contracts, and .com domains at $7.99 per the provider. Crucially, these are SMTP-based private-server mailboxes, not Google or Microsoft accounts, which you plug into Smartlead, Instantly, or any sequencer. Some older Mailscale per-inbox plans may still appear in legacy reviews; we could not independently verify the relationship between the two brands.
Feature Comparison
| Feature |  InboxKit | |
|---|---|---|
| Infrastructure | ||
| Mailbox Type | Real Google Workspace, Microsoft 365, Azure (per InboxKit) | Private SMTP server mailboxes (per the provider) |
| IPs | Dedicated US IPs | Dedicated per server (per the provider) |
| Mailboxes per Unit | Tiered (10 / 30 / 100+) | Up to 200 per server (per the provider) |
| Pricing | ||
| Pricing Model | Per-mailbox, tiered plans | Flat $299/mo per private server |
| Entry Price | $39/mo (10 mailboxes) | $299/mo per server |
| Per-Mailbox at 200 | ~$2.50-3.10/mailbox | $1.50/mailbox at full 200 |
| Domains | Available via InboxKit (price not published) | $7.99/.com via Mailbloom (per the provider) |
| Monitoring & Deliverability | ||
| Domain Monitoring | InfraGuard add-on (first month free): 6h blacklist, DNS drift, auto-pause | 24/7 server & mailbox monitoring (per the provider) |
| Warmup | Isolated Warmup add-on (+$3/mailbox/mo) | Guidance + monitoring, BYO sequencer warmup |
| Trustpilot | — | 4.8 (provider-displayed; not independently verified) |
| Setup & Integrations | ||
| Setup | Automated DNS; ready in ~10 minutes (per InboxKit homepage) | Done-for-you in minutes (per the provider) |
| Sequencer Integrations | 24+ native (Instantly, Smartlead, Lemlist, Reply, Salesforge, Woodpecker, etc.) | SMTP credentials for any sequencer |
| API & Webhooks | REST API + webhooks (per InboxKit) | Developer API access (per the provider) |
Switch to InboxKit
Dedicated IPs. Isolated infrastructure. From $2.50/mo.
Pricing Comparison
InboxKit$2.70/mailbox · 100 mailboxes · annual
Agency plan (30 included) + 70 extra at $2.70/mb
$2.99/mailbox · 100 mailboxes · annual
Pricing Verdict: At high mailbox counts per server, Mailbloom's flat $299 works out to roughly $1.50/mailbox at the maximum 200, versus InboxKit's published per-mailbox rates of approximately $2.50-3.10. The trade-off is that Mailbloom mailboxes are SMTP-based on a private server, not real Google or Microsoft accounts, and dedicated IPs only earn their keep at sustained high volume. InboxKit's pricing is fully public, per-mailbox, and you pay for exactly the real accounts you use; InfraGuard monitoring is available as an add-on (first month free, then a paid add-on per the InboxKit pricing page).
Infrastructure and Deliverability
Real Google, Microsoft, and Azure Accounts
InboxKit provisions genuine Google Workspace, Microsoft 365, and Azure mailboxes with admin access. Recipients and filters see mail from established provider domains, which is generally regarded as a deliverability advantage versus SMTP-only senders, though outcomes vary by domain, content, and volume.
InfraGuard Monitoring Add-On with Auto-Pause
InfraGuard is offered as an add-on with the first month free per the InboxKit pricing page. Per the provider, it runs blacklist checks every 6 hours, watches DNS for drift, tracks bounce rate, and can auto-pause mailboxes when metrics go red. Mailbloom advertises its own 24/7 server and mailbox monitoring; we did not independently benchmark either.
Lower Entry Price for Lower Mailbox Counts
$39/month for 10 mailboxes (per the InboxKit pricing page) works for teams that aren't yet at the volume needed to keep dedicated IPs warm. Mailbloom's $299/server flat price is more cost-effective per mailbox at high mailbox counts per server.
Azure as a Third Provider Option
InboxKit offers an Azure mailbox add-on ($30 per tenant per the InboxKit pricing page) — useful for diversifying provider risk across a fleet. Mailbloom does not advertise an equivalent option.
24+ Native Sequencer Integrations + Full API
Per the InboxKit website, 24+ native platform integrations (Instantly, Smartlead, Lemlist, Reply.io, Salesforge, Woodpecker, and more), plus full REST API and webhooks across plans. Mailbloom provides SMTP credentials that work with any sequencer.
InboxKit dashboard — 18M+ emails, 5,039 domains, 16,754 mailboxes for a single client
Mailscale (Mailbloom) homepage
Pros & Cons
InboxKitStrengths
- Real Google Workspace, Microsoft 365, and Azure mailboxes on dedicated US IPs (per InboxKit)
- InfraGuard available as a monitoring add-on with first month free (per InboxKit pricing page) — blacklist checks every 6 hours, DNS drift detection, bounce tracking, auto-pause per the provider
- Lower entry price ($39/mo for 10 mailboxes) for teams below dedicated-IP volume threshold
- Azure as a third provider option for fleet diversification
- Domain registration available via InboxKit (price not published on pricing page)
Limitations
- Higher per-mailbox cost than Mailbloom's $1.50/mailbox at the maximum 200 per server
- No private-server / dedicated SMTP option advertised
- Isolated Warmup is a paid add-on ($3/mailbox/month per InboxKit pricing page)
- InfraGuard monitoring is a paid add-on beyond the free first month
Strengths
- Flat $299/month per private server with up to 200 mailboxes (per the provider)
- Dedicated IPs per server, advertised as fresh and with no blacklist history
- Provider claims customer screening to protect platform IP range
- Provider-advertised Trustpilot 4.8 and ~5-minute live-chat response (Trustpilot profile not independently retrieved at the publication date)
Limitations
- SMTP-based private-server mailboxes, not real Google/Microsoft/Azure accounts
- Dedicated IPs only earn their keep at sustained high volume
- $299 flat cost is expensive per mailbox if you don't fill the server
- No native isolated warmup (BYO via sequencer)
Who Should Choose What
In our view, InboxKit and Mailscale (Mailbloom) suit different buyers. InboxKit appears to fit teams that want real Google/Microsoft/Azure accounts, transparent per-mailbox pricing, and optional InfraGuard monitoring as an add-on — especially below the volume threshold where dedicated IPs pay off. Mailbloom appears to fit higher-volume senders who specifically want private-server IP isolation (per the provider) and can fill a 200-mailbox server with enough daily volume to keep those IPs warm.
Got questions? We've got answers.
The names Mailscale and Mailbloom are sometimes referenced together in the same provider conversation, but we could not independently confirm the timeline or details of any rebrand at the publication date. The live Mailbloom product at mailbloom.com is sold at $299/month per private server with up to 200 mailboxes per the provider's pricing page.
Per the InboxKit website, InboxKit provisions real Google Workspace, Microsoft 365, and Azure accounts on dedicated US IPs with admin access. These are described as the underlying provider accounts, not shared-IP proxies or SMTP relays.
Per the provider's website, Mailbloom's mailboxes run on its own private SMTP servers with dedicated IPs, which you then plug into a sequencer. If you specifically need real Google Workspace, Microsoft 365, or Azure accounts, InboxKit is the option.
We did not run controlled deliverability tests between the two and recommend treating any deliverability claim — from either provider — as marketing until you measure it yourself. The two approaches differ: Mailbloom advertises IP isolation plus customer screening; InboxKit pairs real Google/Microsoft/Azure accounts with optional InfraGuard monitoring. At lower volume, real-account approaches tend to be more forgiving; at sustained high volume, dedicated IPs are more relevant.
At 200 mailboxes per server, Mailbloom's flat $299 works out to roughly $1.50/mailbox, below InboxKit's published $2.50-3.10/mailbox. At lower mailbox counts, $299 per server is more expensive per mailbox than InboxKit's tiered plans. Model both at your actual volume and account-type requirements.
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