Switching from Instantly
The best alternative to Instantly’s mailboxes
Google mailboxes for $3 that export to Instantly in one click.
- No plans, no minimums
- Domain rotation and migration built in
- 24/7 support on Slack, chat and email
4.7 on G2 · 120 reviewsAt a glance
- Domains
- Your own or new
- Bought through Instantly
- Where they work
- Any of 24+ sequencers
- Inside Instantly only
- Admin panel
- Full access
- Kept by Instantly
Competitor details from public pages, checked 19 Oct 2026.
1,000 Google mailboxes, monthly
- Inboxkit
- $3,000at today’s rate
- Instantly
- $5,000
Ready in 30 to 120 minutes
SPF, DKIM and DMARC configured automatically.
Teams sending on Inboxkit
Pricing
What it costs at common volumes
Common volumes, side by side, at published prices.
| Mailboxes | Inboxkit, monthly | Inboxkit, annual | Instantly |
|---|---|---|---|
| 20mailboxesInstantly also bills at least 4 domains at $15 a year | Inboxkit, monthly$60 | Inboxkit, annual$50 | Instantly$100 |
| 100mailboxesInstantly also bills at least 20 domains at $15 a year | Inboxkit, monthly$300 | Inboxkit, annual$250 | Instantly$500 |
| 1,000mailboxesInstantly also bills at least 200 domains at $15 a year | Inboxkit, monthly$3,000 | Inboxkit, annual$2,500 | Instantly$5,000 |
Instantly turns on warmup for done-for-you accounts automatically, and every Instantly plan includes warmup. Ours is a $3 add-on.
Mailboxes only. Instantly adds at least one $15 domain a year for every 5 done-for-you accounts. Sending from Instantly needs an Instantly plan with either option.
Head to head
Inboxkit vs Instantly, line by line
Taken from public pages. Where Instantly publishes nothing, the cell says so.
| Feature | Inboxkit | Instantly |
|---|---|---|
| Mailboxes | Official, paid Google Workspace and Microsoft 365, plus Azure | Done-for-you Google accounts; AirMail is Instantly’s own SMTP |
| Claude Code / Codex (MCP) | Remote MCP server, connects to Claude Code and Codex | Hosted MCP server; API on all plans |
| Admin panel access | Complete admin panel access for every domain | Kept by Instantly, not transferred |
| Google price | $3 a mailbox, or $2.50 annual | $5 an account a month, plus $15 a domain a year |
| Microsoft | Microsoft 365 at $3, plus Azure at $30 a tenant for up to 100 | No done-for-you option listed |
| Domains | Buy domains or connect your own | Bought through Instantly, .com or .org, up to 5 accounts each |
| Where they work | One-click export to 24+ sequencers, Instantly included | Configured for use inside Instantly only |
| Switching sequencers | One-click export to any of 24+ | Terms give no right to transfer, port or migrate them |
| Pre-warmed | Pre-warmed mailboxes, live in hours | $10 an account a month, in batches of 5 |
| Warmup | 14-day warmup on an isolated network, a $3 add-on | On automatically; included in every Instantly plan |
| Monitoring (add-on) | InfraGuard every six hours: blacklists, DNS, bounces, placement, auto-pause | Deliverability tests and DNS checks; no automatic schedule stated |
Competitor details from public pages, checked 19 Oct 2026. Sources: Instantly email accounts (instantly.ai); Instantly pricing (instantly.ai); Instantly done-for-you setup (help.instantly.ai); Instantly pre-warmed accounts (help.instantly.ai); Instantly AirMail accounts (help.instantly.ai); Instantly email accounts dashboard (help.instantly.ai); Instantly terms (instantly.ai); Instantly MCP server (developer.instantly.ai); Inboxkit pricing.
Competitor offers can change after that date. Trademarks belong to their owners.
Why teams switch
What you get on Inboxkit
The differences that matter if you buy from Instantly today.
Export to Instantly in one click
Or to Smartlead and any of 24+ sequencers. Export your mailboxes now or later.
$3 a mailbox
Google or Microsoft at the same price. $2.50 on annual billing.
Domains you already own
Connect your own domains or buy new ones, in one click. SPF, DKIM and DMARC are set automatically.
Microsoft 365 and Azure
Microsoft 365 at $3, and up to 100 mailboxes on one Azure tenant for $30.
Official, paid seats
Official, paid Google Workspace and Microsoft 365 mailboxes. Orders complete in 30 to 120 minutes, automatically.
Claude Code and Codex
Connect Claude Code or Codex to Inboxkit’s remote MCP server, alongside a REST API with 119 endpoints.
Renewals
Card declined at renewal? Your mailboxes wait for you
If we can’t charge your card at renewal, we don’t delete your mailboxes. You get 10 to 14 days to pay and recover them at your usual price, with no recovery fee.
- Kept for 10 to 14 days
- Your usual price
- No recovery fee
No gap in sending
Move your sending mailboxes to Inboxkit
Create a free account
Pay only for the mailboxes you add. No plan to pick first.
Buy or connect domains
Then add Google Workspace, Microsoft 365 or Azure mailboxes on them.
Export to your sequencer
One click to 24+ sequencers, including Smartlead and Instantly.
Run both side by side
Keep Instantly running while the new mailboxes warm up.
Customers
From teams sending on Inboxkit
G2 High Performer, Spring 2026, rated 4.7 out of 5 from 120 reviews
“Burned through 9 domains in 6 weeks with our old setup. Same domains have been running fine on Inboxkit since March.”
LukaManyreach“Our agency manages 40 client accounts now. Would have been impossible before this.”
Walter WinnAnevo Marketing“Our ops guy used to manually configure DNS for every mailbox. Now he's actually doing ops work instead.”
Atishay JainEagle Info Services“Finally stopped waking up to suspended Google accounts. It's been 6 months now and everything is still clean.”
Jesse OuletteLeadmagic“Consolidated our entire email stack into one dashboard. Saved us 6 hours a week just in context switching.”
Abbas SomjiThe Playbook Agency“I used to spend every Monday morning setting up new domains because the old ones kept dying. Haven't done that in months.”
NaufalUnderstory
FAQ
Questions before you switch
Short answers, from the published prices and pages listed under the table.
Do Inboxkit mailboxes work with Instantly?
Yes. Export them to Instantly in one click. The same mailboxes also export to any of 24+ sequencers.
How do the prices compare at agency volume?
A Google mailbox is $3 here and $5 as an Instantly done-for-you account. 1,000 cost $3,000 against $5,000 a month, before domains.
Can I use domains I already own?
Yes. Connect your own or buy new ones here. Instantly’s done-for-you accounts need a domain bought through Instantly.
Can I move the mailboxes to another tool later?
Yes, to any of 24+ sequencers. Instantly’s terms give no right to transfer, port or migrate its accounts.
Instantly includes warmup. Do you?
Warmup here is a $3 add-on: 14 days on an isolated network. Or start on pre-warmed mailboxes, live in hours. Instantly turns warmup on for its done-for-you accounts.
What inbox placement can I expect?
Our public figure is 90%+ inbox placement. InfraGuard, an add-on, checks every domain every six hours.
Open a free account. Pay only for the mailboxes you add.
$3 a mailbox a month, or $2.50 on annual billing. No plans, no minimums.