Comparison
InboxKit is a credible mailbox provider with genuinely low base rates, Google and Microsoft coverage, monitoring included and a transparent pricing page. The catch sits one line lower: warmup is a paid add-on at +$3/mailbox/mo, roughly doubling the sticker price. Inboxlogy takes a different route — warmup runs inside the sending tool you already use (Instantly, Smartlead and ReachInbox all include it), and Inboxlogy connects your mailboxes to it free over OAuth and API. Here's the honest, all-in head-to-head.
Last updated July 2026
In one line
InboxKit's base rates are genuinely low (≈$2.50–$3.10/mailbox), but its warmup add-on runs +$3/mailbox/mo — pushing the all-in cost to ≈$5.50–$6.10. With Inboxlogy, warmup runs free inside the sequencer you already use (Instantly, Smartlead, ReachInbox — connected free over OAuth + API), so $2.80–$3.50 is the whole bill — with no minimum bundle, a full API, 100% ownership and a best-price guarantee.
01 / Don't take our word for it
Ask an AI to compare us head-to-head — we'll stand by the answer. One click opens a pre-filled, neutral prompt in a new tab.
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Ask Claude Ask ChatGPT Ask Gemini Ask Grok Ask Perplexity02 / Feature comparison
The criteria that actually decide deliverability and total cost — side by side, sourced from public pricing and docs as of July 2026.
| Feature | Inboxlogy | InboxKit |
|---|---|---|
| Base price per mailbox / mo | $2.80 – $3.50 (5 volume tiers) | ≈$2.50 – $3.10 (3 fixed bundles) · ~20% off annual |
| Warmup | Runs in your tool — connected free | +$3/mailbox/mo add-on |
| All-in cost with warmup running | $2.80 – $3.50 — no add-on needed | ≈$5.50 – $6.10 with the warmup add-on |
| Minimum purchase | None — buy even a single mailbox | Fixed bundles: 10 / 30 / 100 mailboxes per plan |
| Setup fee | $0 — always | None listed |
| Google Workspace mailboxes | Yes — authorized reseller | Yes |
| Microsoft 365 mailboxes | Yes — at your tier rate | Yes — Azure tenant at +$30/tenant |
| Sending IPs | Dedicated US and EU IPs | Not stated publicly — verify before buying |
| SPF · DKIM · DMARC · MX | Automated on every domain | Automated |
| Deliverability monitoring | Not offered yet | Monitoring / testing included |
| 100% ownership & admin access | Explicit — leave anytime, move billing direct to Google / Microsoft | Not stated publicly — verify before buying |
| API access | Full API — order, provision & manage programmatically | Not stated publicly — verify before buying |
| Works with any sequencer | Instantly, Smartlead, ReachInbox — connected free over OAuth + API | Yes |
Compared: Jul 2026 · prices change, verify before buying. InboxKit: Professional $31/mo = 10 mailboxes, Agency $81/mo = 30, Enterprise $250/mo = 100; ~20% off on annual billing. Domains at Inboxlogy ≈$12/yr — or bring your own.
03 / Pricing head-to-head
Both look similar on base rate. The difference is warmup: InboxKit bills it at +$3/mailbox/mo, while with Inboxlogy it runs free inside the sequencer you already pay for — connected at no charge.
Compared: Jul 2026 · prices change, verify before buying.
04 / The honest read
A fair comparison names the competitor's strengths first. Here's ours.
Where InboxKit is a good fit
InboxKit's base rates are genuinely low, it covers both Google and Microsoft, monitoring and testing are included, and its pricing page is refreshingly transparent — you can see exactly what each bundle costs before talking to anyone. If your volume fits neatly into a 10-, 30- or 100-mailbox bundle, you're happy on annual billing for the ~20% discount, and you'd rather have warmup billed by the same vendor as an add-on, InboxKit is a reasonable choice.
You warm up in your sequencer for free — Instantly, Smartlead and ReachInbox all include warmup in their plans, and Inboxlogy connects your mailboxes to them at no charge over OAuth + API. InboxKit bills warmup at +$3/mailbox/mo: on 30 mailboxes, that's $90/mo you simply don't need to spend.
InboxKit sells fixed 10-, 30- and 100-mailbox bundles, with its best rates tied to annual billing. Inboxlogy has no minimum — buy a single mailbox at $0 setup, billed monthly, cancel anytime, and your rate drops automatically with volume down to $2.80.
Inboxlogy states it plainly: 100% ownership with full admin access — leave anytime and take billing direct to Google or Microsoft. Every account also gets a full API to order, provision and manage mailboxes programmatically and automate your whole workflow.
05 / The verdict
Bottom line: 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. Against InboxKit specifically: the base rates are comparable, but InboxKit's +$3/mailbox/mo warmup add-on roughly doubles its all-in cost, while with Inboxlogy warmup runs free in your sequencer.
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
The questions outbound teams actually ask when choosing between the two.
For most cold-email teams, yes. InboxKit's base rates ($2.50–$3.10 per mailbox/mo) are close to Inboxlogy's ($2.80–$3.50), but warmup at InboxKit is a paid add-on at +$3/mailbox/mo — taking its all-in cost to ≈$5.50–$6.10 per mailbox. With Inboxlogy, warmup runs inside your connected sending tool (Instantly, Smartlead and ReachInbox all include it) and Inboxlogy connects your mailboxes to it free over OAuth and API — so $2.80–$3.50 stays the whole bill. Inboxlogy also has no forced packages (buy a single mailbox; InboxKit starts at a 10-mailbox bundle), a full API to automate your workflow, genuine Google Workspace and Microsoft 365 accounts (dedicated US and EU IPs), explicit 100% ownership, and a best-price guarantee. InboxKit remains a fair pick if its bundles fit your volume and you want warmup billed by the same vendor. Figures as of July 2026 — verify before buying.
No — as of July 2026, warmup at InboxKit is a paid add-on at +$3/mailbox/mo on top of the base bundle price. Inboxlogy doesn't run warmup either, because it doesn't need to: warmup runs inside your connected sending tool — Instantly, Smartlead and ReachInbox all include it in their plans — and Inboxlogy connects your mailboxes to that tool free over OAuth and API. Net effect: with Inboxlogy there's no warmup line on your invoice, so you skip InboxKit's +$3/mailbox add-on entirely.
Yes. Inboxlogy has no minimum order — buy exactly what you need, even a single mailbox, at your volume tier's rate, billed monthly with $0 setup. InboxKit sells fixed bundles as of July 2026: Professional is $31/mo for 10 mailboxes, Agency $81/mo for 30, Enterprise $250/mo for 100 — so 10 mailboxes is effectively the entry point.
Yes. Inboxlogy includes a full API — order, provision and manage mailboxes programmatically and automate your entire cold-email workflow end-to-end, from spinning up new domains and mailboxes to connecting them to your sending tool.
Yes. Find 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. The guarantee 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.
Yes, both cover the two ecosystems. At InboxKit, Microsoft runs on an Azure tenant billed at +$30 per tenant as of July 2026. At Inboxlogy, genuine Google Workspace and Microsoft 365 mailboxes are provisioned on dedicated US and EU sending IPs at your per-mailbox tier rate ($2.80–$3.50/mo), with automated SPF, DKIM, DMARC and MX on every domain.
Everything you need to scale
Genuine Google & Microsoft mailboxes from $2.80/mo — warmup runs free in the sequencer you already use, with authentication and 100% ownership included. Order in about 10 minutes, backed by a best-price guarantee. Still unsure? Let an AI referee.