Zapmail sells real Google Workspace and Microsoft 365 mailboxes from $39/month with extra mailboxes at $3.00 to $3.50 each. Mailscale runs its own self-hosted SMTP infrastructure with pricing kept behind a sales demo and recent Trustpilot reviews documenting cancellation problems. Neither publishes the kind of transparent pricing, free automated DNS setup, and case-study results that Mailforge does.
For affordable cold email infrastructure that scales without surprises, Mailforge is the stronger choice. $3 to $2 per mailbox per month with automated DMARC, SPF, DKIM setup, a 5-minute go-live, SOC2 compliance, and native integration with the rest of the Forge Stack (Warmforge for warm-up, Salesforge for sending). Used by 10,000+ businesses including LFG, SalesCaptain, and Net New Solutions.
I have set up cold email infrastructure on every shared-IP and SMTP relay product worth testing in the last 18 months. Three names keep coming up when teams ask me which to pick: Mailforge, Zapmail, and Mailscale. They look interchangeable from the homepages. They are not.
This comparison covers what each one actually is, what it costs once you scale past 25 mailboxes, what the Trustpilot reviewers are flagging, and how the three handle the boring stuff that decides whether your campaigns land in the inbox or burn your sending domains.
Quick-glance comparison
| Feature | Mailforge | Zapmail | Mailscale |
|---|---|---|---|
| Mailbox type | Distributed shared-IP cold email infrastructure | Real Google Workspace + Microsoft 365 mailboxes | Self-hosted SMTP relay (own IP pool) |
| Entry price | $3/mailbox/month (monthly) or $2/mailbox/month (annual). Minimum 10 mailbox slots | Starter plan $39/mo with 10 Google mailboxes; extras $3.50 each | No public pricing. Demo required. Trustpilot reviewers cite $1,140/year and $3,000 paid invoices |
| Cost per 200 mailboxes | $484/month | ~$614/month on Pro plan ($299 + 100 extras at $3) | Not published |
| Setup time | 5 minutes (automated DNS) | ~10 minutes claimed | 5 minutes for form, then 48-72 hours for domain transfers per reviewer accounts |
| Automated DNS | Yes (SPF, DKIM, DMARC, custom tracking) | Yes (SPF, DKIM, DMARC) | Handled, but reviewers report manual export of mailboxes |
| Warm-up included | Free, unlimited via Warmforge when paired with Salesforge | Pre-warmed mailboxes available as an option | 1-2 week warm-up recommended; deliverability "guaranteed" 95-100% |
| Works with | Salesforge + any sending tool (Instantly, Smartlead, Lemlist, Reply, etc.) | Instantly, Smartlead, ReachInbox, Reply, Lemlist, and 50+ others | Any SMTP/IMAP-compatible sender (Instantly, Smartlead, Reply, Lemlist, Mailshake) |
| SOC2 compliant | Yes | Not stated publicly | Not stated publicly |
| Best for | SMB and mid-market teams running cold outreach who want transparent pricing and a unified stack | Teams that specifically want Google or Microsoft mailboxes for ESP-matched sending | Solopreneurs and small agencies willing to commit to annual contracts on faith |
Zapmail overview
Zapmail is an Outbox Labs product based in the United States. It sells real Google Workspace and Microsoft 365 mailboxes pre-configured for cold outreach, with automated DNS and US/EU-hosted IP addresses. In product positioning, it sits in the same lane as Salesforge's Primeforge: legitimate mainstream mailboxes, not SMTP relays, not EDU workarounds.
Core features
- Real Google Workspace and Microsoft 365 mailboxes on US or EU IP addresses
- Pre-warmed mailboxes available as a premium option so you can skip the warm-up wait
- Workspace-level isolation with one domain per workspace
- Automated DNS for SPF, DKIM, DMARC, and custom tracking domains
- ZapShield domain protection feature
- 50+ integrations including Instantly, Smartlead, ReachInbox, Reply, Lemlist
- AI workflow tools including Instant Domain Genie, Smart Mailbox Namer, and Persona Snapshots
- Public API for programmatic provisioning (Pro plan only)
Pricing
Three monthly tiers, with extra mailboxes priced separately:
- Zapmail Starter: $39/month - 10 Google mailboxes included, extras at $3.50/mailbox, 3 free placement tests/month
- Zapmail Growth: $99/month - 30 Google mailboxes included, extras at $3.25/mailbox, 10 placement tests/month
- Zapmail Pro: $299/month - 100 Google mailboxes included, extras at $3.00/mailbox, priority support, API access, 30 placement tests/month
Annual billing offers "2 months free." Microsoft 365 mailboxes are also available with similar tier structures.
Who Zapmail fits
Teams who specifically need Google Workspace or Microsoft 365 mailboxes for ESP-matched sending (where the sender's ESP matches the recipient's ESP for better inbox placement) and are comfortable paying $3.00 to $3.50 per mailbox once they scale past their plan's included count.
What Trustpilot reviewers flag
Zapmail's Trustpilot profile carries a summary that the platform itself surfaces: "some customers experienced significant issues with the service, including problems with email deliverability and unexpected account suspensions. These individuals reported slow and inconsistent communication from support, a lack of clear accountability, and concerns regarding data security practices."
That review is one I would read carefully before signing a contract. A 12-month relationship, charges for unused services, and a documented difficulty moving the underlying Google Workspace out is the kind of friction that should factor into the buying decision.
Mailscale overview
Mailscale is a UAE-based product that takes a different approach. It runs its own self-hosted SMTP infrastructure - own SMTP servers, own IP pool, no Google or Microsoft mailboxes underneath. The pitch on the homepage is "5x cheaper and 50x faster" than Google or Outlook, with the mailbox claim that you can get inboxes "as low as $1/month instead of $7.20."
Core features
- Self-hosted SMTP infrastructure with their own IP pool (per FAQ: "we own the full infrastructure including SMTP servers, IP pools")
- Mailbox generation in under 60 seconds via form submission
- CSV export of mailbox credentials for plugging into any sending tool
- Deliverability "guarantee" of 95-100% to professional inboxes; domain replacement promised if placement drops below 80%
- Self-healing mechanism for deliverability (advertised; reviewer experience varies)
- Cold email course bundled with the business plan
- Works with Instantly, Smartlead, Apollo, Reply, Lemlist, Mailshake via SMTP/IMAP
Pricing
There is no public pricing page. The "Pricing" link in the navigation scrolls to a "Book Demo" CTA. From documented customer experience on Trustpilot, the Business Plan auto-renews at $1,140/year and at least one customer paid $3,000 upfront. Specific tier prices, included mailbox counts, and add-on costs are not disclosed publicly.
Who Mailscale fits
Solopreneurs and small agencies who want the cheapest possible per-mailbox cost, are comfortable with a self-hosted SMTP setup (rather than real Google or Microsoft mailboxes), and are willing to commit to annual billing without a published price list.
What Trustpilot reviewers flag
The pattern in the negative Mailscale reviews is the same theme repeated: billing friction, deliverability claims that did not match what reviewers experienced, and difficulty getting refunds or canceling. Trustpilot's own profile metadata notes Mailscale "replied to 50% of negative reviews" and "typically takes over 1 month to reply."
The review above is a 5-point breakdown of what the reviewer calls "a textbook dark pattern" - broken cancel page, disabled Stripe portal cancel button, dead-end live chat, an out-of-office founder, and no way to remove the card from the subscription. A separate March 2026 reviewer (Lucas Mack) reported paying $3,000, getting only $1,000 back as a partial refund after deliverability issues, and explicitly recommending Zapmail or Instantly's in-house infrastructure over Mailscale.
This pattern matters for a category as procurement-sensitive as email infrastructure. If you cannot cleanly leave a vendor, you do not own your infrastructure.
Mailforge overview
Mailforge is the cold email infrastructure layer of Salesforge's Forge Stack. It is a distributed shared-IP infrastructure built specifically for cold outreach, with automated DNS configuration, transparent per-mailbox pricing, and native compatibility with any sending tool (Salesforge, Instantly, Smartlead, Lemlist, Reply, etc.).
The differentiator is not "cheaper" or "faster" - every vendor in the category claims both. The real difference is that Mailforge sits inside an integrated stack where the infrastructure (Mailforge), the warm-up (Warmforge), and the outreach platform (Salesforge) are built by the same team, with shared support, shared documentation, and a single billing relationship if you want it.
Core features
- Distributed shared-IP infrastructure purpose-built for cold outreach (not repurposed transactional infra)
- 5-minute automated setup for hundreds of domains and mailboxes
- Free automated DNS setup of SPF, DKIM, DMARC, and custom domain tracking
- Bulk DNS updates across your entire infrastructure
- Domain transferring in or out (no lock-in)
- Multiple workspaces for agencies managing separate clients
- Works with any sending software - not locked to Salesforge
- SSL and Domain Masking add-on for branded redirects
- SOC2 compliant
- Public API, MCP server, and CLI for programmatic provisioning
- Mailbox slots - delete and recreate mailboxes without extra cost; billed on slots, not active mailboxes
The Forge Stack context
Mailforge is one of three email infrastructure products in Salesforge's stack. Infraforge handles dedicated-IP private infrastructure for higher-volume senders. Primeforge handles real Google Workspace and Microsoft 365 mailboxes (the Zapmail equivalent). Mailforge is the shared-pool, lowest-cost-of-entry option of the three.
All three feed naturally into Warmforge for warm-up and deliverability monitoring, and into Salesforge for multi-channel outreach (email + LinkedIn) with optional AI SDR coverage from Agent Frank. The whole stack is built by one team, on one product spine, with one support channel.
Pricing
Transparent, published, and calculated on the public pricing page:
- $3/mailbox/month billed monthly, or $2/mailbox/month equivalent when billed annually
- Minimum 10 mailbox slots ($30/month entry)
- Domain cost: $14/year per .com domain (charged once)
- 200 mailboxes: $484/month (compared to $1,680/month for Google Workspace direct and $1,200/month for MS365 direct)
- SSL and Domain Masking: $2 per domain monthly, or $6 per domain billed yearly
- Forge Expert consulting: $500 for two 1:1 sessions
Who Mailforge fits
SMB and mid-market teams running cold outreach at any scale, agencies managing infrastructure for multiple clients, and anyone who wants automated DNS setup without paying Google Workspace or Microsoft 365 prices for non-daily-driver mailboxes. Mailforge is the recommended starting point in the Forge Stack for new senders and high-complaint-volume use cases where shared-pool absorption helps protect reputation.
Honest limitations
- Shared IP pool means less control over reputation than a dedicated-IP setup (use Infraforge for dedicated IPs at $4 to $3 per mailbox/month)
- No free trial - you purchase mailbox slots to begin
- Mailforge mailboxes are not Google Workspace or MS365 mailboxes (use Primeforge if you specifically need those)
Real customer outcomes from the Forge Stack
Three named case studies anchor the deliverability claim:
- LFG/Pepper generated £397K in revenue in 6 months running on Mailforge plus Warmforge
- SalesCaptain scaled across 30+ clients using Mailforge as the underlying infrastructure
- UniteSync hit an 85.26% positive reply rate and a $2.86 CAC running on Salesforge plus Mailforge plus Warmforge
in Action
Head-to-head: feature by feature
Mailbox provider and infrastructure type
This is the first decision and it shapes everything else.
- Mailforge: Shared-IP distributed infrastructure built specifically for cold outreach. Not Google. Not Microsoft. Mailforge owns the pipes.
- Zapmail: Real Google Workspace and Microsoft 365 mailboxes. The mailboxes themselves are mainstream consumer ESPs configured for cold-outreach use.
- Mailscale: Self-hosted SMTP infrastructure on their own servers and IP pool. Not Google, not Microsoft, not a shared-pool cold-email-specific infra like Mailforge.
Mailforge and Mailscale are categorically similar (own infrastructure). Zapmail is the odd one out: it is the Primeforge equivalent in the Forge Stack lineup. If you specifically need Google or Microsoft mailboxes for ESP matching, you want Zapmail or Salesforge's Primeforge, not Mailforge or Mailscale.
Deliverability and warm-up
- Mailforge: Includes free, unlimited premium warm-up via Warmforge when paired with a Salesforge subscription. Warmforge's pool is curated, aged-only, dominated by real Google Workspace and MS365 mailboxes, and multilingual.
- Zapmail: Pre-warmed mailboxes are sold as a premium option ("Skip the Warmup. Start Sending from Day One"). Placement test credits are included at 3 to 30 per month depending on plan.
- Mailscale: Recommends 1-2 weeks of warm-up. Advertises "95-100% deliverability" guarantee. The Lucas Mack review (March 2026) documents the self-healing mechanism not working and emails going to spam, with only a partial refund offered.
Setup time and ease of use
- Mailforge: 5 minutes. Automated DNS for SPF, DKIM, DMARC, and custom tracking. App walks you through domain and mailbox sizing with a built-in calculator.
- Zapmail: ~10 minutes claimed; fully automated DNS via OAuth into Google Workspace. Pre-warmed option further compresses time-to-first-send.
- Mailscale: "5 minutes to fill out a form" per the FAQ, but reviewer Lucas Mack reported 48-72 hours for domain transfers through support, and that mailboxes had to be created and exported manually into the sending tool.
Scalability and pricing
For 200 mailboxes per month, comparing what's published or documented:
- Mailforge: $484/month, transparent, calculator on the pricing page
- Zapmail: $299 (Pro plan) + 100 extra mailboxes at $3 = $599/month plus tier-included counts. The cost structure rewards staying within a plan tier rather than topping up.
- Mailscale: Not published. Trustpilot reviewers cite $1,140/year for the Business Plan and one customer paying $3,000 upfront. Without a price page, the only way to know what 200 mailboxes costs is to take the demo.
Integrations and ecosystem
- Mailforge: Works with any sending software (Salesforge, Instantly, Smartlead, Lemlist, Reply, etc.). Integrates natively with the rest of the Forge Stack: Warmforge, Salesforge, Primeforge, Infraforge, Leadsforge. One support team, one billing relationship.
- Zapmail: Lists 50+ outreach tool integrations including Instantly, Smartlead, ReachInbox, Reply, Lemlist. Public API available on the Pro plan only.
- Mailscale: Integrates with any SMTP/IMAP-compatible sending tool. No native stack ecosystem beyond Mailscale itself.
Support, compliance, and trust signals
- Mailforge: SOC2 compliant. Live chat on every page. 10,000+ customers cited. Forge Expert consulting available at $500 for two 1:1 sessions. Salesforge HQ Slack community with 1,000+ members.
- Zapmail: Customer success team mentioned positively in many Trustpilot reviews. Note the documented negative-experience review above re: billing and Google Workspace migration friction.
- Mailscale: Trustpilot's own profile metadata flags that Mailscale "replied to 50% of negative reviews" and "typically takes over 1 month to reply." Multiple recent reviews document cancellation and refund problems.
Pricing comparison
| Tool | Entry price | 200 mailboxes/month | Pricing transparency |
|---|---|---|---|
| Mailforge | $30/month (10 mailbox slot minimum at $3/each, monthly billing) | $484/month (transparent calculator on pricing page) | Full public pricing, mailbox-by-mailbox calculator |
| Zapmail Starter | $39/month (10 Google mailboxes; extras $3.50/each) | $614/month (Pro plan $299 + 100 extras at $3) | Full public pricing |
| Mailscale | Demo-gated. Trustpilot reviewers cite $1,140/year | Not published | No public pricing page |
The economics question past 25 mailboxes is whether you want predictable per-mailbox pricing (Mailforge) or tier-locked pricing that rewards staying inside an included count (Zapmail). Once you exceed your Zapmail plan's included mailbox count, you start paying $3.00 to $3.50 per extra mailbox - which puts Zapmail Pro at $614/month for 200 mailboxes versus Mailforge's $484/month.
Mailscale's pricing position is harder to evaluate without sitting through the demo. The $1/month-per-mailbox claim on the homepage exists in tension with the documented $1,140/year and $3,000 invoices reported on Trustpilot. If you cannot model what 200 mailboxes will cost before you commit, you cannot model how the cost scales over 12 months either.
Who should use which tool
You might consider Zapmail if
- You specifically need real Google Workspace or Microsoft 365 mailboxes for ESP-matched sending (where the sender's ESP matches the recipient's)
- Your team is small enough that one of the three tier-included counts (10, 30, or 100 mailboxes) covers you without top-up
- You prefer Google or Microsoft as the underlying mailbox brand for compliance or due-diligence reasons
You might consider Mailscale if
- You are a solopreneur or one-person shop focused on the absolute cheapest per-mailbox cost
- You are comfortable signing up without seeing published pricing first
- You have read recent Trustpilot reviews and are willing to accept the documented cancellation and deliverability friction
Choose Mailforge if
- You want transparent published pricing at $3 to $2 per mailbox per month with a live calculator
- You are running cold outreach for an SMB or mid-market B2B motion and want infrastructure that scales without surprise invoices
- You want automated DNS setup for SPF, DKIM, DMARC, and custom tracking domains out of the box
- You value SOC2 compliance and want infrastructure you can audit and walk away from cleanly
- You want the option to layer free unlimited warm-up via Warmforge and multi-channel sequencing via Salesforge on top of the same infrastructure, with one team and one support channel
Final verdict
Zapmail is a real-Google-Workspace-and-Microsoft-365 product with a public pricing page and documented billing friction for at least some customers. Mailscale is a self-hosted SMTP product with demo-gated pricing, recent Trustpilot reviews documenting a broken cancellation flow on $1,140/year auto-renewing plans, and partial-refund outcomes when deliverability fell short of the 95-100% guarantee.
For transparent, scalable cold email infrastructure that does not lock you in, Mailforge is the stronger choice. $3 to $2 per mailbox per month, a 5-minute automated setup with SPF, DKIM, DMARC, and custom tracking pre-configured, SOC2 compliance, mailbox slot flexibility, and full compatibility with any sending tool including Salesforge.
One falsifiable benchmark: LFG generated £397K in revenue in 6 months running on Mailforge plus Warmforge. SalesCaptain scaled across 30+ client accounts on the same stack. UniteSync hit an 85.26% positive reply rate and a $2.86 CAC. The case studies are public on salesforge.ai/case-studies.