Instantly Alternative: Mailboxer vs Instantly Compared
Looking for an Instantly alternative for cold email? Here is how Mailboxer and Instantly describe their plans and features, using each company’s own public pages checked on 27 October 2026.
Mailboxer is one of our own tools, so we have an interest in this comparison. Every Instantly fact comes from instantly.ai and is linked below.
Plans side by side, as listed on each pricing page
Prices are monthly list prices shown on each pricing page on 27 October 2026. Check the vendors for current prices.
Mailboxer vs Instantly at a glance
| Mailboxer | Instantly | |
|---|---|---|
| Entry paid plan | Pro $25 a month ($20 billed yearly): 50 mailboxes, 25,000 emails a month. | Growth $47 a month: unlimited email accounts, 1,000 uploaded contacts, 5,000 emails a month. |
| Middle plan | Scale $59 a month ($47 billed yearly): 250 mailboxes, 150,000 emails a month. | Hypergrowth $97 a month: unlimited email accounts, 25,000 uploaded contacts. |
| Top plan | Unlimited $199 a month ($159 billed yearly): unlimited mailboxes, 500,000 emails a month. | Light Speed $358 a month: 500,000 emails a month, 100,000 uploaded contacts. |
| Mailbox limits | 5 on Free, 50 on Pro, 250 on Scale, unlimited on Unlimited and Agency. | Unlimited email accounts on the plans listed. |
| Warm-up | Built in on every plan, including Free. Paid plans can set their own ramp. | Unlimited warm-up listed on Growth. |
| One inbox for replies | Unibox. | Unibox. |
| A/B testing | Subject and body of every step. | A/Z testing. |
| Integrations | API, webhooks and MCP. | API and webhooks. |
| Lead finding | ProspectData.io search inside the app. | Lead Finder, sold with separate credits. |
What else you get with Mailboxer
More than email
LinkedIn steps through HeyReach, Expandi, PhantomBuster, Skylead, Dripify or Waalaxy, or manual LinkedIn tasks, plus text and iMessage steps in the same sequence.
Mailbox health in view
A health score for every mailbox, domain and sending IP, blocklist monitoring, and Recovery Mode, which pulls a struggling mailbox, re-warms it and swaps in a fresh one.
Time zone sending
Emails go out 9 AM to 5 PM in each lead’s own time zone.
Reply Agent
An add-on from $19 a month for 500 replies that answers replies and books meetings under rules you set.
Easy to switch
Move your campaigns and leads over from Instantly, Smartlead or QuickMail.
Mailboxes and leads in the app
Buy Spinbox mailboxes and search ProspectData.io leads without leaving Mailboxer.
Instantly lists unlimited email accounts on every plan above, while Mailboxer sets mailbox limits by plan. If you run a very large number of mailboxes, compare that first.
Mailboxer may suit you if you want to
- Run email, LinkedIn, text and iMessage steps from one sequence
- See mailbox health and have a struggling mailbox pulled and re-warmed automatically
- Start on a free plan (5 mailboxes, 2,000 emails a month, no card) and move up as you grow, with a 14-day free trial on every paid plan
- Run client work in white-label workspaces on the Agency plan
Want the outreach run for you? Our cold email agency team sets up and manages campaigns, and our outbound lead generation service ties it to booked meetings.
Mailboxer is one of our tools, so we have a stake in this comparison. Every Instantly fact here comes from Instantly’s own pricing page, checked on 27 October 2026 and linked below. Prices and limits change, so confirm them on Instantly’s site before you decide.
Sources checked 27 October 2026
- Instantly pricing page: plans, limits, features and Lead Finder.
- Mailboxer: plans, features, warm-up and integrations.
Is Mailboxer an Instantly alternative?
Yes. Both send cold email from many mailboxes, with warm-up and one inbox for replies. Mailboxer also runs LinkedIn, text and iMessage steps in the same sequence.
How do the prices compare?
Mailboxer’s paid plans are $25, $59 and $199 a month, with a Free plan. Instantly lists Growth at $47, Hypergrowth at $97 and Light Speed at $358 a month. The plans set different limits, so compare mailboxes, emails and contacts as well as price.
Can I move from Instantly to Mailboxer?
Mailboxer says you can move your campaigns and leads over from Instantly, Smartlead or QuickMail.
Does Mailboxer include warm-up?
Yes. Warm-up is built in on every plan, including Free. Paid plans can set their own ramp.
Does Instantly include warm-up?
Its pricing page lists unlimited warm-up on the Growth plan.
Want cold email that books meetings?
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