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Maildoso vs Zapmail: Which to Pick?
We compared Maildoso and Zapmail on pricing, mailbox types, AI tools, and scale for cold email infrastructure. See which provider fits your setup.
The Verdict
Maildoso wins on price and proven scale. SMTP mailboxes from $1.90/mo with 400K+ mailboxes managed is hard to beat. Zapmail wins on mailbox quality with Google Workspace and AI-powered setup tools.
Choose Maildoso for volume, Zapmail for Google Workspace deliverability. Both work with SendKit.
Maildoso vs Zapmail
| Feature | Maildoso | Zapmail |
|---|---|---|
| Pricing | ||
| Price per Mailbox | $1.90-$2.50/mo SMTP from $1.90, Combo (SMTP+GW) from $2-$3 | $3.00-$3.90/mo Google Workspace with tiered pricing plus base fee |
| Domain Cost | From $2/domain Domains available starting at $2 | Not specified Domain pricing not separately listed |
| Cost for 50 Mailboxes | $95-$125/mo 50 x $1.90-$2.50 | $164-$199/mo Growth $99 base + 20 extra x $3.25 |
| Infrastructure | ||
| Mailbox Type | SMTP + Combo SMTP or SMTP plus Google Workspace combo | Google Workspace Exclusively Google Workspace mailboxes |
| Deliverability | ||
| Pre-warmed Accounts | No Warmup must come from sending tool | Yes Accounts come pre-warmed |
| AI Tools | ||
| AI Domain Generator | No Manual domain selection | Yes AI suggests domains that avoid spam triggers |
| Scale | ||
| Scale Track Record | 400K+ mailboxes 400,000+ mailboxes, 10M+ emails/day | 1M+ mailboxes 1M+ mailboxes set up, 330K+ domains |
| Social Proof | ||
| G2 Rating | 4.7 (159 reviews) Verified G2 reviews | 4.5 TrustPilot TrustPilot rating |
| Automation | ||
| API Support | API + MCP Full API and MCP protocol support | Not specified API details not published |
| Integrations | ||
| One-Click Integrations | Instantly, Smartlead, Saleshandy One-click connect with major platforms | Major platforms Integrates with popular cold email tools |
Protect your mailbox investment with dedicated IPs, AI warmup, and auto mailbox protection. Increase mailbox longevity.
Pricing at Scale
Maildoso is significantly cheaper at every volume level. At 50 mailboxes, Maildoso SMTP costs $95 to $125/mo. Zapmail Growth (30 included + 20 extra at $3.25) costs $164/mo.
At 100 mailboxes, Maildoso costs $190 to $250/mo. Zapmail Pro (100 included) costs $299/mo. The gap is consistent: Maildoso saves you 30 to 45% compared to Zapmail.
The trade-off is SMTP versus Google Workspace. If Google Workspace deliverability is worth the premium, Zapmail makes sense. If volume and cost efficiency are priority, Maildoso wins.
Key takeaways
- 50 mailboxes: Maildoso ~$110/mo vs Zapmail ~$164/mo
- 100 mailboxes: Maildoso ~$220/mo vs Zapmail $299/mo
- Maildoso is 30-45% cheaper at every scale
- Trade-off: SMTP pricing vs Google Workspace deliverability
Mailbox Quality and Setup
Zapmail delivers Google Workspace mailboxes that carry inherent trust signals from the Google ecosystem. The AI domain generator and mailbox namer reduce manual setup work. Pre-warmed accounts mean you can start campaigns faster.
Maildoso delivers SMTP mailboxes that depend more on IP reputation for deliverability. The Combo tier adds Google Workspace, but at a higher price ($2-$3/mailbox). Maildoso compensates with the strongest scale proof in this category: 400K+ active mailboxes and 10M+ emails processed daily.
Key takeaways
- Zapmail: Google Workspace with AI tools and pre-warmed accounts
- Maildoso: SMTP at scale with 400K+ mailboxes managed
- Maildoso Combo tier adds Google Workspace at $2-$3/mailbox
Which One Should You Choose
Choose Maildoso if cost per mailbox is your top priority and you plan to use SendKit for warmup and deliverability monitoring. Maildoso is the most affordable way to spin up large numbers of mailboxes quickly. Choose Zapmail if you specifically want Google Workspace mailboxes with pre-warmed accounts and AI-powered setup tools.
The higher cost buys you better default deliverability and faster time to first campaign. For the best of both worlds, consider InboxKit, which offers Google Workspace at $2.50/mailbox with built-in deliverability tools.
Key takeaways
- Maildoso: best for budget-conscious high-volume mailbox provisioning
- Zapmail: best for Google Workspace with AI setup and pre-warmed accounts
- InboxKit: best overall value with GWS at $2.50 and deliverability tools
Pros & Cons
Maildoso
Strengths
- Lowest per-mailbox pricing starting at $1.90/mo
- 400K+ mailboxes managed, 10M+ emails/day
- 4.7 G2 rating from 159 reviews
- Domains from $2/domain
- API + MCP support
- One-click integrations with major platforms
Limitations
- SMTP only on base tier
- No pre-warmed accounts
- No AI domain or mailbox naming tools
- No built-in warmup or deliverability tools
Zapmail
Strengths
- Google Workspace mailboxes with strong deliverability
- AI domain generator and AI mailbox namer
- Pre-warmed accounts for fast ramp-up
- 1M+ mailboxes set up, 330K+ domains
- 4.5 TrustPilot rating
Limitations
- Higher per-mailbox cost ($3.00-$3.90 vs $1.90-$2.50)
- Base monthly fees ($39-$299/mo) on top of per-mailbox charges
- Google Workspace only, no SMTP option
- No built-in inbox placement testing or verification
Protect your mailbox investment with dedicated IPs, AI warmup, and auto mailbox protection. Increase mailbox longevity.
Got questions? We've got answers.
Yes. Maildoso SMTP starts at $1.90/mailbox with no base fee. Zapmail starts at $39/mo base plus $3.00-$3.50 per extra mailbox. Maildoso is 30-45% cheaper at every volume level.
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