Cold Email Inboxes 30% Cheaper.
Every Provider. No Minimums.
Microsoft, Google, SMTP+, Azure from $2.99/mo. Real human on WhatsApp. 15-minute delivery.
Why SimpleInboxes? Cold Email Infrastructure Built Right
Everything you need to run cold email at scale — without the headaches.
Every Provider, One Dashboard
SMTP+, Microsoft 365, Google Workspace, and US-based Azure IPs all under one roof. Mix and match providers on the same order, managed from a single account — no more juggling vendors.
Land in the Inbox, Not in Spam
Isolated tenants on US-based Azure IPs and Google Workspace infrastructure mean your emails reach real inboxes — not spam folders. Your sending reputation stays clean, always.
Pay Less, Get More — No Minimums
Competitors charge more and force you into bundles. We keep pricing simple: $2.99 for Microsoft, $3.30 for Google, and no minimum order.
Dedicated Account Manager — on WhatsApp
No ticket queues. No chatbots. Every customer gets a dedicated account manager on WhatsApp — whether you have 3 inboxes or 300.
Full REST API — Delivered in 15 Minutes
Every action on the dashboard is a single API call. Rename inboxes, swap domains, pull health metrics, rotate IPs — all programmatic, all available the moment your first order ships.
Bring Burned Domains Back to Life
Only SimpleInboxes does this. When a sending domain burns its reputation, park it in our Recovery Pool. Our recovery infrastructure heals it back to clean — then reactivate with one click when the health light turns green. No competitor offers this.
Bring Burned Domains Back to Life
Every other provider tells you to throw burned domains away and buy new ones. We don't. Park a burned domain in our Recovery Pool and our recovery infrastructure heals its sender reputation. A health light tracks recovery — green means ready. Reactivate with one click and we re-provision inboxes on the healed domain. No competitor offers this.
- Heal burned domains instead of throwing them away
- Color-coded health lights — green means ready to reactivate
- One-click reactivation re-provisions inboxes automatically
The Best Deliverability Starts in the US
After analyzing deliverability across millions of cold emails, the data is clear — US-routed IPs consistently outperform APAC, EU, and shared offshore infrastructure. That's why every SMTP+, Microsoft 365, and Google Workspace inbox you send through SimpleInboxes routes exclusively through isolated, US-based tenants. No offshore routing. No shared servers. Just the cleanest IPs available.
- US-only IP routing — no APAC, EU, or offshore infrastructure
- Isolated tenants protect your sender reputation from other users
- 98.7% average inbox placement across millions of emails sent
The Best Deliverability Starts in the US
After analyzing deliverability across millions of cold emails, the data is clear — US-routed IPs consistently outperform APAC, EU, and shared offshore infrastructure. That's why every SMTP+, Microsoft 365, and Google Workspace inbox you send through SimpleInboxes routes exclusively through isolated, US-based tenants. No offshore routing. No shared servers. Just the cleanest IPs available.
- US-only IP routing — no APAC, EU, or offshore infrastructure
- Isolated tenants protect your sender reputation from other users
- 98.7% average inbox placement across millions of emails sent
Start Cheaper. Keep Pricing Simple.
Competitors charge more per inbox and often make you buy a bundle first. We charge less from inbox one: $2.99 for Microsoft and $3.30 for Google, with zero minimums.
- No minimum order — buy 1 inbox or 1,000
- $2.99/inbox (Microsoft) · $3.30/inbox (Google) — industry's lowest
- Flat pricing stays simple at every order size
Dedicated Account Manager — On WhatsApp
No ticket queues. No chatbots. Every customer gets a dedicated account manager on WhatsApp — whether you have 1 inbox or 1,000. Every issue is handled by a real human with response times under an hour.
- Dedicated account manager for every customer, at every plan
- Real humans on every message — no bots, no canned responses
- Response times under an hour, resolutions same day
Ditch the Spreadsheets. Order in Minutes.
No more copy-pasting into Google Sheets or chasing email threads. Pick your provider, enter a domain, name your inboxes, connect your sending tool, and check out — all from one clean interface. Most orders take under five minutes.
- Microsoft or Google — choose your provider in one click
- Name inboxes, connect your sending tool, and check out in minutes
- No spreadsheets, no back-and-forth — just a simple web app
Your Entire Workflow, One API Call Away
Stop clicking through dashboards. Rename inboxes, rotate domains, pull health metrics — every action in SimpleInboxes is a single API call. Build it into your onboarding scripts, your CRM, or your internal tools. Ship in minutes, not days.
- Complete REST API — every dashboard action available programmatically
- Rename inboxes, swap domains, and manage DNS in bulk via code
- Webhook alerts for inbox health, order status, and DNS changes
One Dashboard. Every Client. Zero Chaos.
Stop juggling logins and spreadsheets. Agency Mode gives each client their own isolated workspace with separate billing, domains, and controls — all managed from a single dashboard. See spend across every client at a glance, bulk-rename inboxes when reps change, and cancel entire workspaces in one click when clients churn.
- Isolated workspaces — per-client domains, billing, and credit cards
- Bulk rename, bulk cancel, and bulk DNS across hundreds of inboxes
- Real-time spend breakdown across every client from one view
See How We Stack Up
Compare the key differences across SimpleInboxes, InboxKit, and ZapMail — including the Domain Recovery Pool no other provider offers.
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Or switch & pay — set up in 1 minute, no minimums →Works With Your Sending Tools
Upload your inboxes to any major cold email platform in seconds.
~80 of 200 spots left · Plug into your sending tool in under 5 minutes
Or sign up and connect your tools →Cold Email Inbox Pricing — Simple & Transparent
Three providers. No hidden fees. No contracts.
Microsoft is $2.99/inbox/mo, Google is $3.30/inbox/mo, and SMTP+ is $1.00/inbox/mo.
SMTP+
Flat rate — same at any volume
- AWS IPs
- AWS dedicated IPs
- Best bang for buck
- Cheapest per send
- IMAP/SMTP access
- Connected to your sending tool
Microsoft 365
Flat rate — same at any volume
- Tier-1 US-based Outlook IPs
- Done-for-you DNS setup
- Native Outlook access
- Isolated admin tenants
- IMAP/SMTP access
- Connected to your sending tool
Google Workspace
Flat rate — same at any volume
- Google Workspace infrastructure
- Done-for-you DNS setup
- Native Gmail access
- Google admin console
- IMAP/SMTP access
- Connected to your sending tool
Simple flat pricing for every order size. No minimums, no contracts, no hidden feature gates.
All plans include: Done-for-you DNS · Dedicated account manager · Full API · Self-service dashboard
No credit card required. Cancel anytime.
Frequently Asked Questions About Cold Email Inboxes
Still have questions?
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Questions? We're here to help.
Claim Free Inboxes — Yours for Life
Limited to the first 200 spots. ~80 still open. Get inboxes you never get billed for.
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