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vsInboxKit vs ScaledMail: Self-Serve Control vs Fully-Managed Multi-Provider Mix (2026)
InboxKit and ScaledMail are frequently shortlisted together as two of the big Google Workspace providers. Both sell real mailboxes for cold email, but they differ on control and how monitoring works. InboxKit is self-serve: real Google, Microsoft 365 and Azure accounts you provision and control, with InfraGuard monitoring included and visible. ScaledMail is fully managed: you give them a volume target and they build and run a blended Google, Outlook and SMTP setup, with no self-serve dashboard and reporting sold as an add-on.
ScaledMail homepage as of May 2026
Our Summary
ScaledMail (scaledmail.com) sells fully managed, pre-warmed mailboxes with complete DNS authentication. You pick a sending volume and provider mix, and ScaledMail registers domains, configures authentication, provisions mailboxes, runs warmup, and monitors deliverability, with setup in 24 to 72 hours. It serves 2,000+ agencies and includes a dedicated Slack support channel.
Its defining feature is the multi-provider mix. Google Workspace runs $3.50 per mailbox (2 to 3 mailboxes per domain, up to 25 sends per day), Microsoft Outlook is $50 per domain for 25 mailboxes (about $2 each, up to 10 sends per day), and SMTP is $3.75 per domain for 4 mailboxes (under $1 each, up to 10 sends per day). Reporting is a paid add-on on every tier.
ScaledMail's own worked example for 2,000 emails per day, split evenly across all three providers, is 42 domains and 218 mailboxes at $397.75 per month base, with reporting on every account adding about $256 per month. It is white-glove by design: there is no granular self-serve dashboard, the team builds and maintains everything, and detailed reporting sits behind that add-on.
Feature Comparison
| Feature |  InboxKit | |
|---|---|---|
| Model & Control | ||
| Model | Self-serve + support | Fully managed, white-glove |
| Dashboard | Self-serve + full API | No self-serve dashboard |
| Provisioning | Instant, self-serve and via API | Through the managed team |
| Mailboxes & Pricing | ||
| Mailbox Types | Real Google/Microsoft/Azure | Google/Outlook/SMTP mix |
| Per-Mailbox Price | $2.50 to $3.50/mailbox | $3.50 Google / ~$2 Outlook / under $1 SMTP |
| Azure Option | Yes ($30/tenant for 100) | Not offered |
| Monitoring & Deliverability | ||
| Monitoring | InfraGuard included and visible | Run for you; reporting is paid add-on |
| Reporting Cost | Included | Add-on (about 50% to 65% on top) |
| Send Caps | Standard provider caps | Outlook & SMTP capped at 10/day |
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Pricing Comparison
InboxKit
inboxkit.com
- Google WorkspaceFrom $2.50/mailbox/mo
Real US-IP Google accounts, full admin access. Plans: Professional $31/mo (10 slots), Agency $81/mo (30 slots), Enterprise $250/mo (100 slots, $2.50/extra on Enterprise annual)
- Microsoft 365From $2.50/mailbox/mo
Official Microsoft 365 accounts with admin control. Same plan tiers as Google Workspace, no Microsoft premium.
- Azure Mailboxes$30/domain
Up to 100 mailboxes per domain on Azure infrastructure
ScaledMail
scaledmail.com
- Google Workspace$3.50/mailbox/mo
2 to 3 mailboxes per domain, up to 25 sends/day. Reporting add-on $2/mailbox/mo.
- Microsoft Outlook$50/domain/mo
25 mailboxes per domain (about $2 each), up to 10 sends/day. Reporting add-on $5/domain/mo.
- SMTP$3.75/domain/mo
4 mailboxes per domain (under $1 each), up to 10 sends/day. Reporting add-on $2/mailbox/mo.
- Worked example (2,000/day)$397.75/mo base
42 domains, 218 mailboxes blended across all three providers. Reporting on every account adds about $256/mo.
Pricing Verdict: ScaledMail's blended rate can come out lower at scale (about $1.82 per mailbox in its 2,000-per-day worked example) if you lean on Outlook and SMTP, but that example is base cost: adding reporting on every account adds about $256 per month, roughly 64% on top. SMTP is also reputation-light and the Outlook and SMTP tiers cap at 10 sends per day. InboxKit runs about $2.50 to $3.50 per real mailbox with monitoring included and no reporting add-on, and gives you full control and metrics without paying extra for visibility.
Infrastructure and Deliverability
You Keep the Controls
A self-serve dashboard plus a full API means you provision and decommission mailboxes instantly, automate across client workspaces, and see your own deliverability telemetry. ScaledMail provisions through its team and puts detailed reporting behind an add-on.
Monitoring Included and Visible
InfraGuard's blacklist checks, DNS drift detection, bounce tracking, and auto-pause are included and visible to you. With ScaledMail, detailed per-account telemetry can add 50% to 65% on top of base cost on a large setup.
Real Accounts Plus Azure, No SMTP Tier
InboxKit provisions real Google, Microsoft 365 and Azure accounts with no reputation-light SMTP relay tier. ScaledMail's cheap blended rate leans on SMTP and caps Outlook and SMTP at 10 sends per day.
Transparent Pricing and Instant Provisioning
InboxKit lists per-mailbox pricing publicly and provisions in under 60 seconds. ScaledMail is a managed build with a 24 to 72 hour setup and no self-serve provisioning.
InboxKit dashboard — 18M+ emails, 5,039 domains, 16,754 mailboxes for a single client
ScaledMail homepage
Pros & Cons
InboxKitStrengths
- Self-serve dashboard plus a full API
- Monitoring included and visible (no reporting add-on)
- Real Google, Microsoft 365 and Azure, no reputation-light SMTP tier
- Transparent pricing and instant provisioning
Limitations
- No fully-managed white-glove build option
- No blended Outlook/SMTP rock-bottom rate at scale
Strengths
- Fully managed, white-glove setup
- Multi-provider blend (Google/Outlook/SMTP) optimizes cost at scale
- 2,000+ agencies, dedicated Slack support
- Pre-warmed mailboxes with complete DNS authentication
Limitations
- No self-serve dashboard (team provisions everything)
- Detailed reporting is a paid add-on (about 50% to 65% on top)
- Outlook and SMTP tiers cap at 10 sends/day; SMTP is reputation-light
- No Azure option; no free trial
Who Should Choose What
ScaledMail wins for agencies that want a fully-managed, multi-provider build and are happy to offload operations; its blended Google, Outlook and SMTP economics are competitive at scale if you lean on the cheaper tiers and do not mind paying extra for reporting. InboxKit wins for teams that want to own the dashboard, see their metrics without paying extra, provision instantly, and get InfraGuard monitoring plus the Azure option built in. Both are peer Google Workspace providers; the split is control and visibility versus hands-off management.
Got questions? We've got answers.
No. ScaledMail is a managed service; the team provisions and maintains your infrastructure. InboxKit is self-serve with a dashboard and a full API.
InboxKit includes InfraGuard monitoring, visible to you, on its plans. ScaledMail runs monitoring for you, but detailed reporting is a paid add-on that can add about 50% to 65% to base cost at scale.
ScaledMail's blended rate can be lower at scale if you lean on Outlook and SMTP (about $1.82 per mailbox in its worked example, before reporting). InboxKit runs about $2.50 to $3.50 per real mailbox with monitoring included and no reporting add-on.
InboxKit does ($30/tenant for up to 100 mailboxes). ScaledMail blends Google, Outlook and SMTP, not Azure.
With InboxKit, yes, self-serve and via API in under 60 seconds. With ScaledMail, provisioning goes through the managed team with a 24 to 72 hour build.
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