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Endy Inboxes works if you want a done-for-you private cold email infrastructure service with dedicated IPs, DNS setup, sequencer upload, and Slack or WhatsApp support.
But if you want Google Workspace or Microsoft 365 mailboxes, direct mailbox ownership, lower per-mailbox pricing at volume, managed outbound infrastructure, or deeper infrastructure control, compare the infrastructure model before you compare the mailbox price.
Here are the best Endy Inboxes alternatives:
If your team is replacing Endy because you still want mailbox infrastructure, but not a private SMTP-style setup, Primeforge is the most direct place to start.
It gives you Google Workspace and Microsoft 365 mailboxes, automated DNS, mailbox slots, and compatibility with Salesforge or any other sending software.
Table of Contents
| Alternative | Best For | Mailbox Model | Starting Price | Avoid If |
|---|---|---|---|---|
| Primeforge | Google/MS mailbox ownership | Google Workspace and Microsoft 365 | $4.50 to $3.50/mailbox/month (annual discount available) | You need the cheapest possible SMTP volume |
| Maildoso | Budget mailbox scaling | SMTP, Google Workspace, combo | From $75/month for 30 SMTP mailboxes | You want Microsoft 365 mailboxes |
| Mailreef | Dedicated server control | Dedicated mail server and mailboxes | From $240/month (12-month commitment) or $249/month month-to-month; Enterprise pricing is custom | You want low-cost mailbox-only provisioning |
| Mission Inbox | Isolated infrastructure lanes | Dedicated IP/server infrastructure | From $199/month | You only need simple mailbox provisioning |
| Mailscale | Managed outbound infrastructure | Domains, inboxes, warmup, campaigns, and reply workflow | From $95/month for up to 50 inboxes (some pricing pages show $119/month). Domains typically cost $10–15/year. | You need Google Workspace or Microsoft 365 inbox ownership |
Endy Inboxes is built around a clear promise: private cold email infrastructure, dedicated IPs, complete DNS setup, and a 30-minute setup motion.
That is useful. It removes a lot of manual work.
But the same model raises the important questions:
The better question is not "what is cheaper than Endy?"
The better question is: which infrastructure model matches how your team actually sends?
I evaluated these tools based on how well they replace Endy Inboxes for cold email infrastructure without hiding the operational tradeoffs that show up after the first campaign.
The focus was not just mailbox count. It was whether the tool gives an outbound team the right mix of mailbox model, setup speed, control, deliverability safeguards, and cost clarity.
Primeforge is the strongest Endy Inboxes alternative when you want cold email infrastructure built around real Google Workspace and Microsoft 365 mailboxes, not a private-only mailbox layer.
That matters if your prospects are mostly on Google or Microsoft. Sending from the same provider family gives your team an ESP-matching motion, and it keeps the mailbox model familiar for operators who already understand Google Workspace or Microsoft 365.
Primeforge is part of the Forge stack. Use Primeforge for the mailboxes, Warmforge for warmup and deliverability checks, Salesforge for sequencing and Primebox reply management, and Leadsforge when you need contact data before the send.
The workflow is infrastructure first, warmup second, contact quality third, copy fourth, then volume.
That order matters. Most teams do it backwards.
Primeforge pricing is based on mailbox slots.
Mailbox cost $4.50/month billed yearly and $113/month billed monthly for 25 slots..
That means a 25-mailbox setup costs roughly $113/month for mailboxes..
Domains are priced separately, .com domains at $14/year, so 25 new domains would add about $350/year.
There is no free trial because it is an infrastructure product, but you can explore the app without purchasing domains and mailboxes.
Outbound teams, agencies, and AI SDR workflows that want Google Workspace or Microsoft 365 mailboxes, automated DNS, and portability across sending tools.
Teams that only care about lowest-cost SMTP volume, teams that want one fully managed private infrastructure service, or teams that are not ready to think through domains, warmup, sending limits, and sequencer setup.
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Maildoso is a strong Endy alternative when cost is the only concern.
It sells outbound mailboxes across SMTP, Google Workspace, and combo packages.
The positioning is simple: buy mailboxes and domains in bulk, get DNS automation, connect to your sequencer, and keep the per-mailbox number low.
This is not the same buyer as Primeforge. Primeforge makes sense when mailbox legitimacy and Google/Microsoft continuity are the center of the decision.
Maildoso makes sense when you need a lot of infrastructure and you are comfortable with SMTP volume, IP rotation, and a stricter ramp.
Maildoso's monthly SMTP pricing starts at $75/month for 30 mailboxes, then $158/month for 70 mailboxes, and $570/month for 300 mailboxes.
That puts the entry SMTP package at about $2.50 per mailbox per month, before domains.
Monthly combo plans start at $90/month for 15 Google Workspace plus 15 SMTP mailboxes.
Domains cost $12/year on monthly plans, so a 30-mailbox setup with 10 new domains would add about $120/year.
Quarterly SMTP plans include domain bundles, such as $299/quarter for 32 mailboxes plus 8 domains.
Agencies or outbound operators that need low-cost mailbox volume, can work within package requirements, and know how to manage sending discipline.
Teams that want Microsoft 365 mailboxes, high-control private infrastructure, or a Google/Microsoft mailbox ownership model.
Maildoso vs Inframail: Which Email Infrastructure Is The Right Choice?
Mailreef is for teams that have moved past "I need inboxes" and are thinking in terms of server control, reputation, uptime, and deliverability operations.
It positions around a dedicated mail server, dedicated IP address, unlimited free inboxes, domain and mailbox automation, pre-warmed server/domain/mailbox claims, live delivery consulting, monitoring, and integrations with common cold email sending tools.
That is a different replacement path from Primeforge.
Primeforge gives you mainstream Google and Microsoft mailboxes for cold outreach. Mailreef gives expert cold emailers a dedicated server-style environment where the infrastructure itself is the product.
Mailreef starts at $240/month on the Agency plan with a 12-month commitment. The Agency Flex plan costs $249/month for teams that want month-to-month cancellation. Both plans also add $0.001 per send.
This is not mailbox-only pricing. It is server-level infrastructure pricing.
The plans include a dedicated mail server, dedicated IP address, domain purchases, mailbox creation, SPF, DKIM and DMARC setup, monitoring, API access, support, and Smartlead and Instantly integration.
Each server includes 150+ mailboxes, so the Agency plan comes to roughly $1.60 per mailbox per month if the server is fully used. Enterprise pricing is custom.
Experienced cold email operators, agencies, and high-volume teams that want server-level infrastructure control and have the discipline to operate it.
Smaller teams that want transparent self-serve pricing, Google/Microsoft mailbox ownership, or a simple mailbox procurement flow.
How to Set Up Cold Email Infrastructure in 10 Minutes with Claude Code + MCP
Mission Inbox is the Endy alternative if your email infrastructure problem is bigger than cold outreach.
It positions around isolated servers, dedicated IPs, workload-specific lanes, API or SMTP architecture, pre-send quality checks, deliverability insights, warmup support, and infrastructure for sales, marketing, transactional, financial, legal, and platform email.
It is closer to a private email infrastructure layer for teams that need separation between different types of sending.
A marketing blast should not affect invoices. Sales outbound should not sit on the same reputation surface as product notifications.
Mission Inbox lists a starting price of $199/month, including 30 inboxes, 10,000 sends, and 20 credits.
For a sales team, that means the starting plan is already more than Endy's $25 and $99 tiers, but it includes a broader infrastructure model.
It also lists overage-style additions such as $1 per additional 1,000 sends and $2 to $3 per additional mailbox, so a 50-inbox setup would likely sit above the entry plan once extra mailboxes and usage are added.
Teams that need dedicated infrastructure across sales, marketing, transactional, or platform email and care about separating reputation by workload.
Teams that only need quick cold email inboxes, Google/Microsoft mailbox ownership, or the lowest per-mailbox cost.
Some teams looking for Endy alternatives are not only replacing inboxes.
They are tired of buying domains, setting up mailboxes, warming accounts, uploading lists, writing campaigns, checking replies, and diagnosing deliverability issues as separate jobs.
Mailscale now positions around a managed, agentic outbound workflow: infrastructure, campaign execution, deliverability monitoring, enrichment, and reply handling wrapped into one operating layer.
That makes it useful if your real problem is outbound operations, not just inbox supply. If you want an independent mailbox infrastructure that can move between sequencers, Primeforge, Maildoso, Mailreef, or Mission Inbox make more sense.
Mailscale pricing is based on the number of outbound inboxes you need. Inboxes can go as low as $1/month per inbox, depending on the plan.
The Business plan is listed at $95/month for up to 50 inboxes, while another pricing page version lists it at $119/month. That puts the cost at roughly $1.90 to $2.38 per inbox per month if all 50 inboxes are used.
Domains usually cost around $10 to $15/year with SPF, DKIM, and DMARC configured. Mailscale also recommends using no more than 5 inboxes per domain for deliverability.
Founders, agencies, and lean B2B teams that want a low-cost way to create and manage outbound inboxes without manually setting up every domain, DNS record, and mailbox.
Teams that specifically want Google Workspace or Microsoft 365 mailbox ownership, or teams that need a full sending platform with campaigns, replies, and sales workflow built in.
The five tools above are not interchangeable.
They replace Endy for different reasons:
Endy is a private cold email infrastructure service. Primeforge is Google/Microsoft mailbox infrastructure. Maildoso is a budget SMTP and Google Workspace volume. Mailreef is a dedicated server control. Mission Inbox is isolated infrastructure. Mailscale is managed outbound infrastructure with campaign operations attached.
Pick the model first.
Then pick the vendor.
Endy is still a good fit when you want a white-glove private infrastructure service with dedicated IPs, sequencer upload, 30-minute setup, and Slack or WhatsApp support.
Do not switch just because a different provider looks cheaper.
Endy makes sense if:
The problem is not Endy.
The problem is buying the wrong model for the way your team sends.
If your team is replacing Endy Inboxes, ask these questions:
For most B2B outbound teams evaluating Endy Inboxes alternatives, Primeforge is the best first comparison because it changes the underlying infrastructure model without forcing you into a sequencer-owned workflow.
You get Google Workspace and Microsoft 365 mailboxes, automated DNS, mailbox slots, workspace control, and the ability to plug into Salesforge or another sender.
That is the better question for serious outbound teams:
Do you want to rent another inbox bundle, or do you want mailbox infrastructure your team can actually operate?
Enter your email to get a custom plan & stack recommendation for your business
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Cold email does not fail because your team lacks one more inbox.
It fails because infrastructure, warmup, contact quality, sequencing, reply handling, and reporting are treated as separate chores. That works until you add more domains, more senders, more offers, and more follow-up steps.
If you want Endy-style convenience but need Google Workspace and Microsoft 365 mailboxes for a more portable outbound system, start with Primeforge.
Pair it with Warmforge for warmup and Salesforge for sequencing when you are ready to turn mailbox infrastructure into pipeline motion.