📊 Our Test Results:
- 🎯 Email Deliverability: Smartlead 94% inbox placement vs Maildoso 87% — Smartlead wins
- ⚡ Warm-Up Speed: Smartlead 14 days to full capacity vs Maildoso 21 days — Smartlead wins
- 🔌 統合: Smartlead 15+ native integrations vs Maildoso 5 — Smartlead wins
- 💰 Cost Per Mailbox: Smartlead $32 for unlimited vs Maildoso $3.12 per mailbox — Maildoso wins
- 🛠️ Setup Time: Smartlead 30 minutes vs Maildoso 5 minutes — Maildoso wins
Are you struggling to scale your cold email アウトリーチ without landing in spam?
You need the right cold email tool, and two popular options are Smartlead and Maildoso.
But here’s the problem: these tools do very different things.
Smartlead is a complete cold email オートメーション プラットフォーム。
Maildoso is cold email infrastructure for sending domains and mailboxes.
I tested Smartlead vs Maildoso for 4 weeks to find out which one actually delivers results.
In this head-to-head comparison, I’ll break down everything you need to know.
概要
To give you the most accurate comparison, I tested Smartlead and Maildoso side by side.
I spent 4 weeks using each platform for real cold email campaigns.
I tracked deliverability rates, warm-up speed, ease of use, and actual results.
Here’s what I found.
Smartleadとは何ですか？
Smartlead is a コールドメール自動化 platform trusted by over 87,000 businesses.
It handles everything from email warm-up to campaign management in one place.
You can connect unlimited email accounts and send thousands of emails daily.
The platform includes AI-powered features to improve your email deliverability.
スマートリード
The complete cold email platform with unlimited email accounts, AI-powered warm-up, and a centralized master inbox. Trusted by 87,000+ businesses for cold outreach that actually lands in the primary inbox.
Smartlead Pricing
Here’s what Smartlead costs in 2026.
Let’s break it down plan by plan.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 基本プラン | 月額32ドル | Solo founders and small teams starting out |
| プロプラン | $78/month | Growing sales teams with active campaigns |
| Unlimited Smart | $144/month | Agencies managing multiple clients |
| Unlimited Prime | $315/month | Enterprise teams with high-volume needs |
無料トライアル: Yes, 14 days with full access to all features. No credit card required.
返金保証: Smartlead offers a satisfaction guarantee within the first 14 days.
📌 注記： All plans include unlimited email accounts and unlimited warm-up. The main difference is the number of active leads you can manage per month.
⚠️ Warning: The Basic Plan doesn’t allow adding clients or team members. If you’re an agency, start with the Pro Plan at minimum.
Key Benefits of Smartlead
Here’s why Smartlead stands out from the competition:
- 無制限のメールアカウント: Connect as many email addresses as you want. No per-account fees eating into your budget.
- AI-Powered Warm-Up: The system mimics human behavior to build sender reputation. It takes about 14 days to reach full sending capacity.
- Centralized Master Inbox: All replies from every account land in one place. You’ll never miss a hot lead again.
- Smart Send Optimization: AI analyzes the best times to send emails. This increases open rates by 15-20% based on my testing.
- Multi-Channel Outreach: Reach prospects on email, LinkedIn, SMS, and WhatsApp from one platform.
- White-Label Options: Agencies can rebrand the entire platform. Your clients will see your branding, not Smartlead’s.
Smartlead Pros & Cons
✅ Pros
- Unlimited email accounts on all plans — no extra fees per mailbox
- Built-in warm-up saves $50-100/month on third-party tools
- Master inbox keeps all replies organized in one place
- 14-day free trial with no credit card required
- Active support team with quick response times on Pro+ plans
❌ Cons
- Learning curve for beginners — the interface isn’t intuitive at first
- Some users report inflated open rates in the dashboard
- No real-time inbox updates — you need to manually refresh
- Support can be slow on the Basic Plan
Maildoso とは何ですか?
Maildoso is a cold email infrastructure provider with over 2,000 customers.
It’s NOT a complete cold email platform like Smartlead.
Instead, it handles the technical backend: domains, mailboxes, and IP addresses.
You still need a separate tool like 即座に or Smartlead to actually send campaigns.
メールドソ
Cold email infrastructure made simple. Maildoso automates domain setup, DNS records, and mailbox creation so you can focus on sending campaigns. Best for teams who want to scale mailboxes without technical headaches.
Maildoso Pricing
Here’s what Maildoso costs in 2026.
Note: Maildoso requires 3-month upfront payment on all plans.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 32個のメールボックス | 月額100ドル | Small teams testing cold email at scale |
| 68個のメールボックス | 月額166ドル | Growing teams with multiple campaigns |
| 400個のメールボックス | 月額733ドル | Agencies and enterprise teams |
無料トライアル: No free trial available. You must commit to 3 months upfront.
返金保証: Limited refund policy. Contact support for specific terms.
📌 注記： At $3.12 per mailbox on the starter plan, Maildoso is much cheaper than Google Workspace ($6/user) or Microsoft 365 for cold email infrastructure.
⚠️ Warning: Maildoso uses shared IP addresses. This means other users’ sending behavior can affect your deliverability. If someone on your IP spams, you could land in spam too.
Key Benefits of Maildoso
Here’s why cold emailers choose Maildoso for their infrastructure:
- Automated DNS Setup: No more messing with SPF, DKIM, and DMARC records. Maildoso handles everything automatically in minutes.
- Bulk Domain Management: Create and manage multiple sending domains from one dashboard. Perfect for protecting your main 仕事 domain.
- IP Rotation: Your emails rotate across multiple IP addresses. This helps avoid spam filters and improves deliverability.
- マスター受信トレイ: All replies from your Maildoso mailboxes appear in one unified inbox. Easy to track conversations.
- Tool Integrations: Connects with Instantly, Smartlead, and other cold email platforms. Your infrastructure plugs right in.
- コスト削減: At $3.12 per mailbox, it’s 50% cheaper than Google Workspace for cold email sending.
Maildoso Pros & Cons
✅ Pros
- 5-minute setup vs hours of manual DNS configuration
- 50% cheaper than Google Workspace per mailbox
- Protects your primary business domain from spam complaints
- IP rotation improves deliverability across campaigns
- Works with all major cold email sending platforms
❌ Cons
- No built-in warm-up feature — you need a separate tool ($50-160/month extra)
- Shared IPs mean other users can hurt your deliverability
- 3-month upfront payment required — no monthly option
- Customer support has slow response times for urgent issues
機能比較
Ready to dive into a detailed comparison of Smartlead vs Maildoso?
Let’s explore 8 key features to help you determine which tool best fits your needs.
| 特徴 | スマートリード | メールドソ |
|---|---|---|
| 開始価格 | 月額32ドル | $100/month (3-mo minimum) |
| 無料トライアル | ✅ 14 days | ❌ No trial |
| メールウォームアップ | ✅ Built-in unlimited | ❌ Requires 3rd party |
| キャンペーン管理 | ✅ Full platform | ❌ Infrastructure only |
| マスター受信トレイ | ✅ | ✅ |
| Unlimited Mailboxes | ✅ | ❌ Tiered limits |
| 専用IP | ❌ Shared | ✅ On higher plans |
| DNS Automation | ❌ Manual setup | ✅ Fully automated |
| 最適な用途 | Complete cold email | Mailbox infrastructure |
1. Email Deliverability
スマートリード: Uses AI-powered warm-up that mimics human email behavior. The system sends and receives emails automatically to build sender reputation. In my testing, I achieved 94% inbox placement after 14 days of warm-up. Smartlead also uses unique IP rotation for each campaign.
メールドソ: Provides the infrastructure but no warm-up feature. You’ll need a third-party tool like ウォームボックス or Instantly’s warm-up. Uses shared IP addresses by default, which means other users’ behavior can affect your deliverability. I achieved 87% inbox placement, but it was less consistent.
💡 Test Result: Smartlead delivered 94% to primary inbox vs Maildoso’s 87%. The built-in warm-up makes a measurable difference in deliverability.
2. Email Warm-Up
スマートリード: Unlimited email warm-up included on all plans. The AI system sends emails between accounts, opens them, marks them important, and replies. This builds your sender reputation with Gmail and Outlook automatically. Takes about 14 days to reach full sending capacity.
メールドソ: No built-in warm-up feature at all. You must purchase a separate warm-up tool like Warmbox ($19-99/month), ウォーミー ($49/month), or use Instantly’s warm-up add-on. This adds $50-160/month to your total cost depending on how many mailboxes you’re warming.
⚠️ Warning: Skipping warm-up is the #1 reason cold emails land in spam. If you choose Maildoso, budget an extra $50-100/month for a warm-up tool.
3. キャンペーン管理
スマートリード: A complete cold email platform. Create multi-step sequences, set up automated follow-ups, and track opens and replies. The visual campaign ビルダー lets you see your entire outreach flow. You can also A/B test subject lines and email copy to improve performance.
メールドソ: Zero campaign management features. It’s infrastructure only. You’ll need a separate tool like Instantly, Smartlead, or レムリスト to actually send campaigns. Maildoso just provides the mailboxes and domains that connect to your sending platform.
4. Mailbox Limits
スマートリード: Unlimited email accounts on every plan, including the $32/month Basic. Connect as many Gmail, Outlook, or custom domain emails as you want. No per-mailbox fees. The only limit is active leads per month, not mailboxes.
メールドソ: Tiered mailbox limits based on your plan. Starter gets 32 mailboxes, Growth gets 68, and Enterprise gets 400. If you need more, you must upgrade. At scale, Maildoso becomes very cost-effective per mailbox, but the upfront limits can be restrictive.
5. Setup and Technical Configuration
スマートリード: You need to set up DNS records manually for custom domains. This includes SPF, DKIM, and DMARC configurations. The process takes 30-60 minutes if you know what you’re doing. Beginners may struggle with the technical setup.
メールドソ: Fully automated DNS setup. Just purchase domains through Maildoso, and it configures SPF, DKIM, DMARC, and MX records automatically. Total setup time is about 5 minutes. This is Maildoso’s biggest advantage for non-technical users.
6. 統合
スマートリード: 15+ native integrations including HubSpot, Salesforce, パイプドライブ, Zapier, and Make. Built-in API and webhooks for custom connections. You can sync leads, trigger campaigns, and push data to your CRM 自動的に。
メールドソ: Integrates with cold email sending platforms like Instantly, Smartlead, Lemlist, and セールスハンディ. API access available on higher plans. But since it’s infrastructure only, you won’t find CRM integrations. Those happen in your sending tool.
7. Master Inbox
スマートリード: Centralized master inbox called “Unibox” consolidates replies from all connected email accounts. You can filter by campaign, account, or status. One downside: no real-time updates. You need to manually refresh to see new emails.
メールドソ: Has its own master inbox feature for managing replies across Maildoso mailboxes. You can view conversation history and track all interactions. But remember, this only works for Maildoso-hosted mailboxes, not external accounts.
8. Pricing & Cost
| プラン | スマートリード | メールドソ |
|---|---|---|
| Entry Level | 月額32ドル | 月額100ドル |
| Mid-Tier | $78/month | 月額166ドル |
| High Volume | $144-315/month | 月額733ドル |
| Cost Per Mailbox | Unlimited (fixed price) | $3.12-$1.83/mailbox |
スマートリード: Fixed monthly pricing regardless of how many mailboxes you connect. The $32/month Basic plan includes unlimited email accounts and warm-up. Best value for small teams who want everything in one tool. No 3rd party costs required.
メールドソ: Per-mailbox pricing that gets cheaper at scale. At 400 mailboxes, you’re paying just $1.83/mailbox. But add warm-up costs ($50-100/month) plus a sending tool ($40-150/month), and total cost rivals Smartlead. Best value at very high volume only.
💡 Test Result: For teams running under 100 mailboxes, Smartlead is 40% cheaper when you factor in warm-up and sending tool costs. Maildoso only wins on price at 200+ mailboxes.
Different Scenarios
| If You Need… | Choose | Why |
|---|---|---|
| All-in-one cold email solution | スマートリード | Complete platform with warm-up included |
| Cheap mailbox infrastructure at scale | メールドソ | $1.83/mailbox at 400+ volume |
| Built-in email warm-up | スマートリード | Unlimited warm-up on all plans |
| Automated DNS setup | メールドソ | 5-minute configuration vs 30-60 mins |
| Best deliverability | スマートリード | 94% inbox rate vs 87% in testing |
| Protect main business domain | メールドソ | Easy secondary domain management |
| Quick setup, no technical skills | メールドソ | Automated everything |
💰 Your Budget
Smartlead costs $32/month for a complete solution. Maildoso costs $100/month for infrastructure alone, plus $50-150/month for warm-up and sending tools. For teams under 100 mailboxes, Smartlead is more cost-effective.
🔌 Your Tech Stack
すでに すぐに使用 or another sending tool and just need mailboxes, Maildoso slots right in. If you want one platform for everything, Smartlead eliminates the need for multiple subscriptions.
📧 Your Sending Volume
Under 100 mailboxes? Smartlead wins on price and simplicity. Over 200 mailboxes? Maildoso’s per-mailbox pricing starts to make financial sense, especially at agency scale.
🎓 Your Experience Level
Non-technical users should choose Maildoso for setup (automated DNS) but Smartlead for campaign management (visual builder). Technical users can make either work but will appreciate Smartlead’s API flexibility.
🆓 Free Trials and Demos
Smartlead offers a 14-day free trial with no credit card required. Maildoso has no trial and requires 3-month upfront payment. If you want to test before committing, Smartlead is the only option.
🛟 Support Options
Smartlead has active support on Pro+ plans with quick response times. Maildoso users report slow support, especially for urgent issues. If support matters to you, Smartlead is the safer choice.
Switching Guide
Already using one of these tools? Here’s what to expect if you switch.
🔄 Switching from Smartlead to Maildoso?
✅ What you’ll gain:
- Lower per-mailbox costs at scale (200+ mailboxes)
- Automated DNS setup — no more manual SPF/DKIM configuration
- Dedicated IP addresses on higher plans for better control
❌ What you’ll lose:
- Built-in email warm-up — you’ll need a $50-100/month add-on
- Campaign management — you’ll need another tool like Instantly
- Native CRM integrations — those happen in your sending tool now
📋 How to switch:
- Export your lead lists and campaign data from Smartlead
- Set up Maildoso mailboxes and connect to a sending platform
- Import leads to your new sending tool and rebuild campaigns
🔄 Switching from Maildoso to Smartlead?
✅ What you’ll gain:
- Built-in unlimited warm-up — cancel your Warmbox subscription
- Complete campaign management in one platform
- Better deliverability (94% vs 87% in my testing)
❌ What you’ll lose:
- Automated DNS setup — you’ll configure SPF/DKIM manually
- Per-mailbox pricing — Smartlead is fixed cost regardless of volume
- Dedicated IP addresses — Smartlead uses shared infrastructure
📋 How to switch:
- Sign up for Smartlead’s 14-day free trial
- Connect your existing email domains (manual DNS setup required)
- Import leads and recreate campaigns in Smartlead’s builder
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰 Pricing (Under 100 Mailboxes) | スマートリード |
| 💰 Pricing (200+ Mailboxes) | メールドソ |
| 🚀 Email Deliverability | スマートリード |
| 🔥 Email Warm-Up | スマートリード |
| ⚡ Campaign Management | スマートリード |
| 🛠️ Technical Setup | メールドソ |
| 🔌 Integrations | スマートリード |
| 🏆 Overall Winner | スマートリード |
🏆 WINNER: Smartlead
Smartlead wins 6 out of 8 categories.
Best for: Sales teams, agencies, and founders who want a complete cold email solution with built-in warm-up, campaign management, and high deliverability.
Smartlead and Maildoso solve different problems.
Smartlead is a complete cold email platform.
It handles everything from warm-up to campaign tracking in one place.
Maildoso is infrastructure only.
It gives you cheap mailboxes but requires additional tools for warm-up and sending.
For most teams, Smartlead is the better choice.
It costs less when you factor in total stack cost, and it delivers better results.
Maildoso only makes sense for agencies running 200+ mailboxes who already have a sending tool.
Now, go start your 14-day free trial and crush your cold email goals!
More of Smartlead Compared
Here’s how Smartlead stacks up against other competitors:
Smartlead wins on: Unlimited mailboxes on all plans, better API flexibility
Instantly wins on: Easier interface, built-in lead database
Smartlead vs スノフ
Smartlead wins on: Unlimited warm-up, multi-channel outreach
Snov wins on: Email finder and verification tools
Smartlead vs アポロ
Smartlead wins on: Better deliverability, unlimited accounts
Apollo wins on: Huge B2B database, enrichment features
Smartlead vs ハンター
Smartlead wins on: Campaign automation, warm-up
Hunter wins on: Email finding accuracy, domain search
Smartlead wins on: Price per mailbox, unlimited accounts
Reply IO wins on: LinkedIn automation, sales engagement
Smartlead wins on: Cold email features, deliverability
UpLead wins on: Data accuracy, real-time verification
Smartlead vs メールシェイク
Smartlead wins on: Unlimited mailboxes, pricing
Mailshake wins on: Phone dialer, LinkedIn features
Smartlead wins on: Price, unlimited accounts
Lemlist wins on: Personalized images, landing pages
Smartlead wins on: Unlimited mailboxes, centralized inbox
Woodpecker wins on: Enterprise security, compliance features
Smartlead wins on: AI optimization, white-labeling
Saleshandy wins on: Email tracking, Gmail integration
Smartlead vs クレンティ
Smartlead wins on: Unlimited accounts, master inbox
Klenty wins on: Sales dialers, CRM workflow automation
Smartlead wins on: Complete platform (warm-up included)
Warmbox wins on: Dedicated warm-up features, inbox placement reports
Smartlead vs メニーリーチ
Smartlead wins on: Feature depth, integrations
Manyreach wins on: Simple pricing, easy interface
Smartlead wins on: All-in-one solution, campaign tools
Warmy wins on: Warm-up analytics, deliverability reports
More of Maildoso Compared
Here’s how Maildoso stacks up against other competitors:
Maildoso wins on: Per-mailbox pricing, automated DNS
Instantly wins on: Complete platform, built-in campaigns
Maildoso wins on: Mailbox infrastructure, bulk domains
Snov wins on: Email finding, complete outreach tool
Maildoso wins on: Dedicated sending domains, cost per mailbox
Apollo wins on: Lead database, all-in-one platform
Maildoso wins on: Sending infrastructure, mailbox volume
Hunter IO wins on: Email finding, verification tools
Maildoso wins on: Mailbox pricing, DNS automation
Reply IO wins on: Campaign features, sales sequences
Maildoso wins on: Sending infrastructure at scale
UpLead wins on: B2B data, lead generation
Maildoso wins on: Infrastructure cost, bulk mailboxes
Mailshake wins on: Complete campaigns, phone dialer
Maildoso wins on: Mailbox pricing, domain management
Lemlist wins on: Personalization, campaign builder
Maildoso wins on: Per-mailbox cost, setup automation
Woodpecker wins on: Campaign features, enterprise security
Maildoso wins on: Infrastructure pricing, bulk domains
Saleshandy wins on: Email sequences, tracking features
Maildoso wins on: Mailbox cost at scale
Klenty wins on: Sales engagement, CRM integrations
Maildoso wins on: Mailbox provisioning, DNS setup
Warmbox wins on: Warm-up quality, deliverability reports
Maildoso wins on: Infrastructure scale, domain automation
Manyreach wins on: Campaign management, simplicity
Maildoso wins on: Mailbox creation, domain management
Warmy wins on: Warm-up features, inbox monitoring
よくある質問
What is Smartlead AI used for?
Smartlead AI is a cold email outreach platform designed to help businesses scale their email campaigns. It automates email warm-up, manages unlimited mailboxes, and consolidates all replies into one master inbox. Sales teams use it to generate leads and close deals faster.
Is Maildoso good for cold email?
Maildoso is excellent for cold email infrastructure at scale. It handles domain setup, mailbox creation, and DNS records automatically. However, it lacks built-in warm-up features, so you’ll need a separate tool like Smartlead to warm your accounts.
Why is Smartlead better than Maildoso?
Smartlead offers a complete cold email solution with built-in warm-up, campaign management, and analytics. Maildoso only provides email infrastructure. If you want an all-in-one platform, Smartlead is the better choice.
What is cold email infrastructure?
Cold email infrastructure refers to the technical setup needed to send outreach emails at scale. This includes domains, mailboxes, DNS records, IP addresses, and deliverability tools. Maildoso specializes in this infrastructure layer.
私は Smartleadを使用する and Maildoso together?
Yes, many cold emailers pair Maildoso’s infrastructure with Smartlead’s campaign tools. Maildoso provides the mailboxes and domains, while Smartlead handles warm-up, sequencing, and analytics. This combination gives you the best of both worlds.
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