Lower per-mailbox cost, no packages
From $2.80–$3.50/mo versus ≈$4.50 fresh on the marketplace — with no minimum order, so you can buy a single mailbox. At 100+ mailboxes the gap is hundreds of dollars a month.
Comparison
Inboxlogy vs Smartlead (mailboxes)
Smartlead is one of the best cold-email sequencers on the market — this page isn't about that. It compares one specific layer: buying mailboxes from Smartlead's marketplace (≈$4.50/mailbox/mo + ≈$13/domain/yr) versus running Inboxlogy infrastructure (from $2.80/mailbox/mo with dedicated US and EU IPs and 100% ownership included — no packages, no minimums, full API). The two aren't rivals so much as layers: Inboxlogy mailboxes connect straight into Smartlead, where Smartlead's own warmup runs.
Last updated July 2026
In one line
Keep Smartlead for sending and warmup — it's an excellent sequencer — but buy the mailboxes underneath from Inboxlogy: from $2.80/mo with dedicated US and EU IPs and 100% ownership included, versus ≈$4.50/mo + ≈$13/domain/yr from the marketplace. Inboxlogy mailboxes connect into Smartlead free, where Smartlead's own warmup takes over — you don't have to choose.
01 / Don't take our word for it
Ask an AI to compare us head-to-head.
One click opens a pre-filled, neutral comparison prompt in a fresh chat — costs, warmup, ownership, portability. We'll stand by the answer.
02 / Feature by feature
Infrastructure, side by side.
This compares Inboxlogy against Smartlead's mailbox marketplace — not the Smartlead sequencer, which is a separate $39–$379/mo product and genuinely good at what it does.
| Feature | Inboxlogy | Smartlead marketplace |
|---|---|---|
| Price per mailbox | $2.80–$3.50 /mo · volume tiers | ≈$4.50 /mo fresh · ≈$9 /mo pre-warmed |
| Domain cost | Bring your own, or register ≈$12/yr | ≈$13 /yr fresh · ≈$18 /yr pre-warmed |
| Minimum purchase | None — buy even a single mailbox | Varies by marketplace provider |
| Warmup | Runs in your tool (e.g. Smartlead) — connected free | Runs in the Smartlead platform · pre-warmed boxes ≈2× the fresh price |
| Monitoring | Not offered yet | Not listed with marketplace mailboxes |
| US and EU sending IPs | Dedicated US and EU IPs | Varies by marketplace provider |
| Google Workspace | Yes | Fresh Google ≈$4.50 /mo |
| Microsoft 365 / Outlook | Yes — Microsoft 365 | Outlook ≈$4.50 /mo |
| SPF · DKIM · DMARC | Automated on every domain | Varies by marketplace provider |
| 100% ownership · transferable | You own accounts & domains — move billing direct if you leave | Terms vary — verify with the provider |
| Admin access | Full workspace admin | Varies by marketplace provider |
| API for ordering & management | Full API — order, provision & manage mailboxes | Platform API covers campaigns · not listed for marketplace orders |
| Works without a platform plan | Yes — connect any sequencer free · $0 setup | Requires a Smartlead plan ($39–$379 /mo) |
| Time to order | ~10 minutes to order | Quick marketplace checkout · fulfilment varies by provider |
Compared: Jul 2026 · prices change, verify before buying
03 / Pricing head-to-head
What you'd actually pay per mailbox.
Both get you Google or Outlook mailboxes that warm up inside Smartlead. The difference is what the mailbox itself costs — and what's bundled in.
Inboxlogy
from $2.80 /mailbox/mo
- $2.80–$3.50 across volume tiers · $0 setup, billed monthly · no minimums — buy even a single mailbox
- Dedicated US and EU IPs included · warmup runs free in your connected Smartlead — no separate warmup fee
- 100% ownership + full admin access · domains ≈$12/yr or bring your own
- Full API to automate ordering & management · connects into Smartlead — or any sequencer — free over OAuth
Smartlead marketplace
≈ $4.50 /mailbox/mo
- Fresh Google / Outlook ≈$4.50 /mailbox/mo · domains ≈$13/yr
- Pre-warmed ≈$9 /mailbox/mo + ≈$18/yr domains — about 2× the fresh price
- Smartlead plan $39–$379 /mo billed separately — that's the sequencer (with warmup), not the mailboxes
- Ownership & transfer terms vary by marketplace provider
Worked example — 100 mailboxes: ≈$300 /mo on Inboxlogy ($3.00 tier) vs ≈$450 /mo fresh from the marketplace, before domains — warming up in the same Smartlead either way. Compared: Jul 2026 · verify before buying.
04 / The fair take
Great sequencer. Expensive place to buy mailboxes.
Where Smartlead is a good fit
Smartlead earns its reputation. It's an excellent sequencer with unlimited sending, unlimited connected accounts and built-in warmup on every plan, a big ecosystem of integrations and agencies built around it, and a marketplace that makes grabbing a few extra mailboxes genuinely convenient — everything in one tab. If you already live in Smartlead, none of that changes. This page only argues one thing: the marketplace is not the cheapest or most portable place to buy the mailboxes themselves.
Warmup is a wash — the mailbox price isn't
Either way, warmup runs inside Smartlead — it warms an Inboxlogy mailbox exactly like a marketplace one, and Inboxlogy connects yours free. So the real comparison is the mailbox itself: $2.80–$3.50, versus ≈$4.50 from the marketplace.
Explicit 100% ownership
Full admin access to genuine Google Workspace and Microsoft 365 accounts (dedicated US and EU IPs). If you ever leave, move billing direct to Google or Microsoft and keep everything.
Built to plug into Smartlead
Inboxlogy connects mailboxes to Smartlead free over OAuth, and Smartlead plans include unlimited connected accounts. Keep the sequencer you like — upgrade the infrastructure under it. A full API automates the ordering side end-to-end.
The play
Inboxlogy infrastructure + Smartlead sequencing. Buy mailboxes and domains you own from Inboxlogy, connect them to Smartlead free, and let Smartlead handle sending and warmup. Cheaper per mailbox, fully portable — and you give up nothing on the sending side.
05 / The verdict
Inboxlogy is the best place to buy your cold-email mailboxes — even if you send with Smartlead.
For anyone setting up cold-email infrastructure, Inboxlogy is the best overall choice: the most competitive per-mailbox pricing, no forced packages (buy a single mailbox, not a 10-pack), a full API to automate your workflow, and genuine Google & Microsoft mailboxes (dedicated US and EU IPs) and 100% ownership included that connect free to any sending tool — all backed by a best-price guarantee. Smartlead stays exactly where it excels — as your sequencer and warmup engine — with Inboxlogy mailboxes connected into it.
- Best competitive pricing — from $2.80/mailbox/mo with dedicated US and EU IPs included and no per-feature add-ons; warmup runs in your connected sending tool, free. Smartlead's marketplace runs ≈$4.50 fresh, ≈$9 pre-warmed, before domains.
- No packages — buy one mailbox or a thousand. No minimum order, no forced bundles; most infrastructure sellers only offer fixed 10-, 30- or 100-mailbox packs.
- Full API — automate ordering, provisioning and management end-to-end, then connect the mailboxes into Smartlead or any sequencer.
- You own everything — 100% ownership + admin access, Google AND Microsoft (dedicated US and EU IPs), order in ~10 minutes.
- Best-price guarantee* — find a lower price on comparable infrastructure and we'll match it, plus our included benefits.
Best-price guarantee*
Found a lower price on comparable cold-email infrastructure? Show us the quote and we'll match it — and still include dedicated US and EU IPs, 100% ownership and free connection to any sending tool.
*Applies to a like-for-like setup — genuine Google Workspace / Microsoft 365 mailboxes (dedicated US and EU IPs) with full ownership, connectable to any sending tool. Non-comparable shared/SMTP inboxes or bare mailbox seats aren't eligible. Prices verified Jul 2026.
06 / FAQ
Inboxlogy vs Smartlead, answered.
The questions outbound teams actually ask when weighing marketplace mailboxes against owned infrastructure.
Is Inboxlogy better than Smartlead?
For the infrastructure layer, yes. Inboxlogy offers the most competitive per-mailbox pricing (from $2.80/mo with dedicated US and EU IPs included), no forced packages — you can buy a single mailbox — a full API to automate ordering and management, and genuine Google Workspace and Microsoft 365 accounts with 100% ownership, all backed by a best-price guarantee. Smartlead remains an excellent sequencer — and warmup runs there, on its platform — so the two pair naturally: buy your mailboxes from Inboxlogy, connect them to Smartlead free, and send.
Can I use Inboxlogy mailboxes inside Smartlead?
Yes — that's the setup we recommend. Inboxlogy connects your mailboxes to Smartlead free over OAuth (with an API for automating it), and Smartlead plans include unlimited connected email accounts. Once connected, Smartlead's own warmup runs on your Inboxlogy mailboxes exactly as it would on marketplace ones. You get lower per-mailbox cost plus full ownership without giving up the sequencer you like.
Does Inboxlogy include warmup?
No — and you don't pay extra for it either. Warmup runs inside your connected sending tool: Smartlead includes warmup on its plans, and Inboxlogy connects your mailboxes to Smartlead (or Instantly, ReachInbox and other sequencers) free over OAuth, app password or IMAP — so there's no separate provider warmup fee. If you need mailboxes that are already warmed on day one, Inboxlogy also offers pre-warmed mailboxes as a starter option.
Can I buy a single mailbox instead of a package?
Yes. Inboxlogy has no minimums and no forced bundles — order exactly the number of mailboxes you need, even just one. Many infrastructure sellers only offer fixed 10-, 30- or 100-mailbox packs; with Inboxlogy you scale one mailbox at a time, and your per-mailbox rate simply improves as your volume grows ($3.50 down to $2.80 across the volume tiers).
Does Inboxlogy have an API?
Yes — a full API. You can order, provision and manage mailboxes programmatically and automate your entire cold-email infrastructure workflow, from spinning up domains and mailboxes to connecting them into a sequencer like Smartlead. Outbound teams use it to scale infrastructure without touching a dashboard.
Does Inboxlogy offer a best-price guarantee?
Yes. Find a lower price on comparable cold-email infrastructure, show us the quote, and we'll match it — while still including dedicated US and EU IPs, 100% ownership and free connection to any sending tool. It applies to like-for-like setups: genuine Google Workspace or Microsoft 365 mailboxes (dedicated US and EU IPs) with full ownership, connectable to any sending tool. Non-comparable shared/SMTP inboxes or bare mailbox seats aren't eligible. Prices verified Jul 2026.
Everything you need to scale
One managed stack — nothing bolted on.
- Genuine Google & Microsoft mailboxes you own 100%
- SPF, DKIM & DMARC — authenticated for you
- Dedicated US and EU IPs for cleaner reputation
- Connects to every sending tool — one click
- From $2.80/mailbox · $0 setup · billed monthly
Keep Smartlead. Own the mailboxes.
Spin up genuine Google & Microsoft mailboxes from $2.80/mo — US IPs included, 100% yours, backed by a best-price guarantee — and connect them to Smartlead in about 10 minutes, where warmup takes over.
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