7 Best Zapmail Alternatives in 2026

Mailforge is a shared-IP cold email infrastructure platform from the Salesforge ecosystem, designed for teams that need the cheapest possible mailboxes at scale. It is not a real Google Workspace or Microsoft 365 provider — instead, Mailforge creates custom SMTP mailboxes on shared infrastructure with automated DNS, SSL certificates, and domain masking included. The platform serves over 10,000 businesses and claims a 4.9 rating with 5-minute setup times.

Pricing is straightforward: $3/mailbox/month on monthly billing or $2/mailbox/month on annual billing, with a minimum purchase of 10 mailbox slots. Features include automated DNS configuration, bulk DNS updates, domain transferring between workspaces, SSL/domain masking, and multiple workspace support.

The primary limitation is that Mailforge mailboxes are shared-IP, not real Google or Microsoft accounts, which can impact deliverability to major ESPs. Warmup requires the separate Warmforge product, monitoring requires Infraforge, and real accounts require Primeforge — each at additional cost. For teams comfortable with shared infrastructure who prioritize cost above all else, Mailforge delivers the lowest per-mailbox price in the market.

Hypertide is an automated cold email infrastructure platform that provisions Google Workspace, Microsoft 365, and Microsoft Entra mailboxes with full tenant isolation per order. Designed to replace the manual work of virtual assistants who traditionally set up email accounts, Hypertide automates the entire process in 4-6 hours per order, down from the days or weeks a VA might take.

Each order costs $50/month and includes 50 inboxes, making the effective cost $1/inbox/month. The platform is compatible with SmartLead, Instantly, and Bison sequencers. Hypertide emphasizes that it replaces what typically costs $1,000/month in VA labor costs for manual mailbox provisioning.

The trade-off is that each order is capped at 50 inboxes with a 5,000 emails/month sending limit, which may be restrictive for high-volume teams. Integration is limited to only 3 sequencers, and there is no domain monitoring, warmup, or inbox placement testing built into the platform. For budget-conscious teams that were previously using VAs to set up accounts manually, Hypertide offers significant time and cost savings.

Maildoso is one of the largest cold email infrastructure platforms, managing over 400,000 mailboxes and processing 10 million+ emails per day for 5,000+ companies. The platform offers both SMTP-only mailboxes and Combo plans that pair SMTP with real Google Workspace accounts, allowing teams to diversify their sending infrastructure across different ESP types.

SMTP pricing scales with volume: 30 mailboxes for $75/month ($2.99/mb), 70 for $158 ($2.25/mb), 300 for $570 ($1.90/mb), and 10,000 for $12,000 ($1.20/mb). Combo plans start at 15+15 (SMTP+GW) for $90/month ($3/mb each) and 35+35 for $175 ($2.99/mb). The platform includes one-click integrations with Instantly and SmartLead, CAPTCHA protection on mailboxes, API access, and MCP support.

Maildoso holds a 4.7 G2 rating from 159 reviews — one of the highest in the cold email infrastructure category. The main caveat is that SMTP mailboxes are not real Google or Microsoft accounts, which can affect deliverability to certain recipients. Google Workspace is only available bundled in Combo plans, not as a standalone option.

SmartLead is a multi-channel cold email outreach platform, not an infrastructure provider. It handles sequencing, AI-powered warmup, unified inbox management, and outreach across email, LinkedIn, calls, and Twitter. SmartLead connects unlimited mailboxes on higher plans and offers SmartAgents AI for automated reply handling and lead qualification.

The Basic plan starts at $39/month with 2,000 active leads and 6,000 emails per month. The Pro plan at $94/month increases to 30,000 leads and 150,000 emails with unlimited mailbox connections. The Custom plan at $174/month adds advanced features. SmartLead also offers SmartSenders, a done-for-you mailbox provisioning service, though pricing is not publicly transparent. Additional features include SmartDialer for cold calling, SmartProspect for lead enrichment, and a mobile app.

SmartLead holds a 4.7 G2 rating and has one of the most active communities in the outreach space. The main limitation is that SmartLead does not provision mailboxes itself (BYOM model) — you need a separate infrastructure provider. SmartSenders pricing adds up, and the total cost of platform + infrastructure can be significant. For teams already using SmartLead for sequencing, pairing it with a dedicated infrastructure provider like InboxKit delivers better value than using SmartSenders.

Infraforge is the dedicated-IP arm of the Salesforge ecosystem, offering private email infrastructure where each customer gets their own IP addresses rather than sharing with other senders. This is the key differentiator from its sibling product Mailforge, which uses shared IPs. Infraforge includes SSL/domain masking, pre-warmed mailboxes, and whitelabel capabilities for agencies.

Pricing starts at $4/mailbox/month on monthly billing and $3/mailbox/month on annual billing, with dedicated IP addresses available at $99 per IP per month. The minimum purchase is 10 mailbox slots. Like other Salesforge products, Infraforge integrates with the broader ecosystem but requires Warmforge for warmup and Primeforge for real Google/Microsoft accounts.

The dedicated IP model gives teams full control over their sender reputation, but it also means building that reputation from scratch, which requires careful volume ramp-up and ongoing management. At $3/mb + $99/IP, costs add up quickly for teams needing multiple IPs. For teams that specifically need IP-level control for compliance or deliverability reasons, Infraforge delivers. For most cold email teams, real Google/Microsoft accounts with established ESP reputation provide better deliverability with less effort.