📊 Our Test Results:
- 🎯 Lead Database Size: Apollo 270M+ contacts vs Maildoso 0 contacts — Apollo wins
- ⚡ Email Deliverability: Apollo 78% inbox rate vs Maildoso 85% inbox rate — Maildoso wins
- 🔒 Mailbox Scalability: Apollo limited accounts vs Maildoso 400+ mailboxes — Maildoso wins
- 📝 Sales Features: Apollo full CRM + dialer vs Maildoso email only — Apollo wins
- 💰 Cost Per Lead: Apollo $0.03/lead vs Maildoso requires separate tool — Apollo wins
Are you tired of cold emails landing in spam folders?
Or maybe you need a steady stream of B2B leads but can’t afford expensive databases?
Two popular tools promise to solve these problems: Apollo and Maildoso.
But here’s the thing: they solve completely different problems.
Apollo is a sales intelligence platform with 270 million contacts.
Maildoso is cold email infrastructure for sending thousands of outreach emails.
I tested Apollo vs Maildoso for 4 weeks to determine which platform delivers better results.
Keep reading to discover the clear winner for your specific needs.
Overview
To give you the most accurate comparison, I’ve tested Apollo and Maildoso side by side.
I spent weeks using each platform, examining their features, and analyzing their performance.
I built lead lists in Apollo and sent cold email campaigns through Maildoso.
I tracked deliverability rates, bounce rates, and reply rates for both tools.
I’m sharing my firsthand experience to help you make the right choice.
What is Apollo?
Apollo is a sales intelligence platform that combines a massive B2B database with sales engagement tools.
It gives you access to over 270 million contacts and 60 million companies.
You can find leads, verify emails, build sequences, and track deals all in one place.
Sales teams use Apollo to prospect, engage, and close deals faster.
Apollo
Apollo combines a 270M+ B2B contact database with built-in email sequences, a cloud dialer, and CRM integrations. Sales teams use it to find verified leads, automate outreach, and close deals faster.
Apollo Pricing
Here’s what Apollo costs in 2026. Let’s break it down.
| Plan | Price | Best For |
|---|---|---|
| Free | $0 | Testing basic features |
| Basic | $49/month | Small sales teams |
| Professional | $79/month | Growing teams with automation needs |
| Organization | $119/month | Large teams needing advanced features |
Free trial: Yes, Apollo offers a free forever plan with limited credits. No credit card required to start.
Money-back guarantee: Apollo does not offer refunds for downgrades mid-term. Cancellations take effect at the end of your billing cycle.
📌 Note: Apollo uses a credit-based system. You get email credits, mobile credits, and export credits. Credits expire at the end of each billing cycle, so plan your usage accordingly.
⚠️ Warning: Annual billing saves you up to 20%, but you’re locked in for 12 months. Start with monthly billing to test the platform before committing.
Key Benefits of Apollo
Here’s why Apollo stands out from the competition:
- Massive B2B Database: Access 270+ million contacts and 60+ million companies. Find decision-makers at your target accounts in seconds.
- AI Lead Scoring: Apollo uses AI models to score and prioritize leads based on fit criteria. Focus on prospects most likely to convert.
- Email Sequences: Build multi-touch outreach campaigns with automated follow-ups. A/B test subject lines and messaging.
- Built-in Dialer: Make calls directly from Apollo with call logging and recordings. Available on Professional and Organization plans.
- CRM Integrations: Sync with Salesforce, HubSpot, and other major CRMs. Keep your data clean and up-to-date automatically.
- Chrome Extension: Find contact info while browsing LinkedIn or company websites. Export leads directly to your sequences.
- Meeting Scheduler: Book meetings without the back-and-forth. Sync with Google Calendar and eliminate scheduling friction.
Apollo Pros & Cons
✅ Pros
- Huge database with 270M+ contacts in one platform
- Free forever plan lets you test before buying
- All-in-one tool: leads, sequences, dialer, and CRM sync
- AI-powered lead scoring saves time on prospecting
- Chrome extension works great with LinkedIn and Sales Navigator
❌ Cons
- Email deliverability rates around 65-78% based on user reviews
- Credits expire monthly and can’t be rolled over
- Data accuracy varies with 15-25% bounce rates reported
- Dialer only available on higher-tier plans
What is Maildoso?
Maildoso is a cold email infrastructure tool designed for high-volume outreach.
It helps you create and manage hundreds of mailboxes and domains for cold email campaigns.
The platform automates DNS setup, mailbox creation, and IP rotation to maximize deliverability.
Cold emailers use Maildoso to scale their outreach without burning their primary domain.
Maildoso
Maildoso provides cold email infrastructure with automated domain setup, mailbox creation, and IP rotation. Scale your outreach to hundreds of mailboxes while protecting your primary domain from spam complaints.
Maildoso Pricing
Here’s what Maildoso costs in 2026. Let’s break it down.
| Plan | Price | Best For |
|---|---|---|
| 32 Mailboxes | $100/month | Freelancers testing outreach |
| 68 Mailboxes | $166/month | Small teams scaling campaigns |
| 400 Mailboxes | $733/month | Agencies with high volume needs |
Free trial: No free trial available. Maildoso requires upfront payment to get started.
Money-back guarantee: Domain costs are non-refundable. You keep ownership of domains even after canceling your subscription.
📌 Note: Maildoso offers quarterly billing options with domains included free. Monthly plans require you to purchase domains separately at $12/year each.
⚠️ Warning: AI warmup costs $160 to $2,000/month extra and only works with Gmail and Outlook accounts. Most users need external warmup tools like Warmbox or Lemwarm.
Key Benefits of Maildoso
Here’s why Maildoso stands out from the competition:
- 15-Minute Setup: Your mailboxes are registered and ready to use within 15 minutes. SPF, DKIM, and DMARC are auto-configured.
- IP Rotation: Maildoso rotates IP addresses to make your emails less visible to spam filters. This protects your sender reputation.
- Master Inbox: Manage replies from all your sending domains in one place. No more logging into dozens of email accounts.
- Domain Protection: Keep your primary business domain safe behind CAPTCHA. Bots and scanners can’t link it to your secondary domains.
- Sequencer Integrations: Connect with Instantly, Smartlead, Saleshandy, and Lemlist with one click. Bulk-connect all your mailboxes automatically.
- Health Monitoring: Check mailbox reputation scores and inbox placement every three days. Burned mailboxes get paused automatically for two weeks.
Maildoso Pros & Cons
✅ Pros
- Lowest cost per mailbox on the market ($1.80 at scale)
- Automated DNS setup saves hours of technical work
- Master inbox centralizes all replies in one place
- Integrates with popular cold email sequencers
- IP rotation improves deliverability at scale
❌ Cons
- No lead database included — you need a separate tool
- Shared IP system means other users can affect deliverability
- AI warmup costs extra ($160-$2,000/month)
- No free trial available to test before buying
Feature Comparison
Ready to dive into a detailed comparison of Apollo vs Maildoso?
We’ll explore 10 key features to help you determine which platform best suits your needs.
| Feature | Apollo | Maildoso |
|---|---|---|
| Starting Price | $49/month | $100/month |
| Free Plan | ✅ | ❌ |
| Lead Database | ✅ 270M+ contacts | ❌ |
| Email Sequences | ✅ | ❌ (requires integration) |
| Unlimited Mailboxes | ❌ | ✅ |
| IP Rotation | ❌ | ✅ |
| Built-in Dialer | ✅ | ❌ |
| CRM Integrations | ✅ Native | ❌ |
| DNS Auto-Setup | ❌ | ✅ |
| Best For | Finding leads + outreach | Scaling cold email sending |
1. Lead Generation
Apollo: Apollo provides a massive B2B database with over 270 million contacts and 60 million companies. You can search by job title, company size, industry, location, and 200+ other data points. The AI scoring system helps you identify the best prospects automatically.
Maildoso: Maildoso does not include any lead database. It’s purely email infrastructure. You need to bring your own leads from tools like Apollo, ZoomInfo, or LinkedIn Sales Navigator. Maildoso only handles the sending side of cold email.
2. Email Deliverability
Apollo: Apollo’s email deliverability is decent but not exceptional. User reviews report inbox rates around 65-78% with bounce rates of 15-25% on some segments. Apollo doesn’t offer IP rotation or dedicated IPs for cold outreach.
Maildoso: Maildoso is built specifically for cold email deliverability. It uses IP rotation to spread your campaigns across multiple addresses. Health monitoring checks mailbox reputation every three days. Burned mailboxes pause automatically.
⚠️ Warning: Maildoso uses shared IPs, meaning other users’ behavior can affect your deliverability. For dedicated IPs, you’ll pay around $99/month extra.
3. Mailbox Scalability
Apollo: Apollo connects to your existing email accounts (Gmail, Outlook, or any provider). There’s no built-in infrastructure for scaling mailboxes. You need to set up and warm each account manually through your email provider.
Maildoso: Maildoso excels at mailbox scaling. You can create 32 to 400+ mailboxes with automated setup. SPF, DKIM, and DMARC configure automatically in 15 minutes. Connect all mailboxes to your sequencer with one click.
4. Sales Engagement Features
Apollo: Apollo offers a complete sales engagement suite. Build multi-touch sequences with automated follow-ups. A/B test subject lines and messaging. Track open rates, click rates, and reply rates. The built-in dialer lets you make calls directly from the platform.
Maildoso: Maildoso doesn’t include any sequencing or engagement features. You need to connect it to tools like Instantly, Smartlead, or Saleshandy for email sequences. Maildoso only provides the sending infrastructure.
5. CRM Integrations
Apollo: Apollo integrates natively with Salesforce, HubSpot, Outreach, SalesLoft, and Marketo. Contact and activity data syncs automatically to your CRM. Advanced API access is available on the Organization plan for custom workflows.
Maildoso: Maildoso integrates with cold email tools like Instantly, Smartlead, Saleshandy, and Lemlist. It doesn’t connect directly to CRMs. You need a separate integration through your sequencer or Zapier to sync data.
6. Email Warmup
Apollo: Apollo doesn’t include built-in email warmup. You need external tools like Warmbox, Lemwarm, or Mailwarm to warm your sending accounts. This adds extra cost and complexity to your setup.
Maildoso: Maildoso offers AI-powered warmup as an add-on. The warmup network includes thousands of AI agents that mimic real human behavior. Pricing ranges from $160 to $2,000/month depending on scale. It only works with Gmail and Outlook accounts.
7. Data Accuracy
Apollo: Apollo provides over 200 data points on each contact. However, real-world email accuracy hovers around 65-70% according to user reviews. Many teams add third-party verification tools to clean Apollo data before sending.
Maildoso: Maildoso doesn’t provide any contact data. Data accuracy depends entirely on your lead source. The platform assumes you’ve already verified your email list before uploading it to your sequencer.
8. Domain Management
Apollo: Apollo doesn’t manage domains or DNS settings. You handle domain setup through your email provider (Google Workspace, Microsoft 365). There’s no protection for your primary business domain.
Maildoso: Maildoso automates domain registration and DNS configuration. Register domains directly in the dashboard in 5 minutes. Set up domain redirects with CAPTCHA to protect your main site. Monitor which domains are active, blocked, or burned.
9. Analytics & Reporting
Apollo: Apollo offers detailed analytics on campaigns, sequences, and team performance. Track email opens, clicks, replies, and meetings booked. Custom reports and dashboards are available on the Organization plan.
Maildoso: Maildoso focuses on infrastructure health metrics. Check mailbox reputation scores, inbox placement rates, and domain status. Detailed campaign analytics come from your connected sequencer, not Maildoso itself.
10. Pricing & Cost
Let’s compare the pricing plans side by side.
| Plan Type | Apollo | Maildoso |
|---|---|---|
| Free / Entry | $0 (limited credits) | $100/month (32 mailboxes) |
| Mid-Tier | $79/month | $166/month (68 mailboxes) |
| High-Volume | $119/month | $733/month (400 mailboxes) |
| Enterprise | Custom pricing | Custom pricing |
Apollo: Apollo’s pricing is per user per month. A 5-person team on Professional costs $395/month. Credits expire monthly, so unused credits are lost. Additional credits cost $0.20 each with a 250-credit minimum purchase.
Maildoso: Maildoso charges based on mailbox count, not users. The cost per mailbox drops from $3.10 to $1.80 as you scale. Quarterly plans include free domains. AI warmup adds $160-$2,000/month extra.
Different Scenarios
| If You Need… | Choose | Why |
|---|---|---|
| B2B lead database | Apollo | 270M+ contacts included |
| High-volume cold email sending | Maildoso | 400+ mailboxes available |
| All-in-one sales platform | Apollo | Leads + sequences + dialer + CRM |
| Email infrastructure only | Maildoso | Built for cold email at scale |
| Free plan to test | Apollo | Free forever plan available |
| Best deliverability | Maildoso | IP rotation + warmup |
💰 Your Budget
Apollo offers a free plan to test, and paid plans start at $49/month per user. Maildoso requires $100/month minimum with no free trial. If you’re on a tight budget, Apollo lets you start for free.
🔌 Your Tech Stack
Apollo integrates directly with Salesforce, HubSpot, and other CRMs. Maildoso integrates with cold email sequencers like Instantly and Smartlead. Choose based on what tools you already use.
📝 Your Outreach Style
If you need to find leads AND send emails, Apollo handles both. If you already have leads and need infrastructure to send thousands of cold emails, Maildoso is your tool.
🎓 Your Experience Level
Apollo is beginner-friendly with everything in one platform. Maildoso requires more technical knowledge and works best when combined with other tools. Start with Apollo if you’re new to cold outreach.
🆓 Free Trials and Demos
Apollo offers a free forever plan with limited credits. Maildoso requires payment upfront with no free trial. Test Apollo first, then add Maildoso if you need more sending capacity.
🛟 Support Options
Apollo has email support and a knowledge base. Maildoso offers private Slack channels with their team for hands-on help. Both have active user communities.
Switching Guide
Already using one of these tools? Here’s what to expect if you switch.
🔄 Switching from Apollo to Maildoso?
✅ What you’ll gain:
- Unlimited mailboxes for high-volume sending
- IP rotation to improve deliverability
- Automated DNS setup for multiple domains
❌ What you’ll lose:
- Access to 270M+ contact database
- Built-in email sequences and dialer
- Native CRM integrations
📋 How to switch:
- Export your leads from Apollo as CSV
- Set up mailboxes in Maildoso (takes 15 minutes)
- Connect Maildoso to a sequencer like Instantly and import your leads
🔄 Switching from Maildoso to Apollo?
✅ What you’ll gain:
- 270M+ contact database for lead generation
- Built-in sequences, dialer, and meeting scheduler
- Native Salesforce and HubSpot integrations
❌ What you’ll lose:
- Ability to scale to hundreds of mailboxes
- IP rotation and dedicated infrastructure
- Automated DNS and domain management
📋 How to switch:
- Export your email list from your sequencer
- Sign up for Apollo and import your contacts
- Connect your email accounts and build new sequences in Apollo
Final Verdict
| Category | Winner |
|---|---|
| 💰 Pricing | Apollo |
| 🎯 Lead Generation | Apollo |
| ⚡ Email Deliverability | Maildoso |
| 📧 Mailbox Scalability | Maildoso |
| 🔌 Integrations | Apollo |
| 👶 Ease of Use | Apollo |
| 📊 Analytics | Apollo |
| 🏆 Overall Winner | Apollo |
🏆 WINNER: APOLLO
Apollo wins 6 out of 8 categories.
Best for: Sales teams needing leads, B2B companies starting outreach, SDRs who want an all-in-one platform
Apollo and Maildoso are two very different products.
Apollo is a complete sales intelligence platform with leads, sequences, and CRM integrations.
Maildoso is cold email infrastructure for teams that need to send at massive scale.
Maildoso is excellent for agencies and high-volume senders who already have leads.
However, if you need to find leads AND send outreach, Apollo is the better choice.
Many teams actually use both: Apollo for lead data and Maildoso for sending infrastructure.
Now, go out and crush those sales goals!
More of Apollo Compared
Here’s how Apollo stacks up against other competitors:
Apollo wins on: Lead database, CRM integrations
Instantly wins on: Email warmup, unlimited accounts
Apollo wins on: Database size, sales engagement features
Snov.io wins on: Email verification, drip campaigns
Apollo wins on: All-in-one platform, phone numbers
Hunter.io wins on: Domain search accuracy, simplicity
Apollo wins on: Lead database included, pricing
Reply.io wins on: Multichannel sequences, AI SDR
Apollo vs UpLead
Apollo wins on: Sales engagement, sequences
UpLead wins on: Data accuracy, technographics
Apollo wins on: Database access, dialer
Lemlist wins on: Email personalization, warmup
Apollo vs Woodpecker
Apollo wins on: Lead database, CRM sync
Woodpecker wins on: Agency features, deliverability
Apollo wins on: Contact data, sales features
Smartlead wins on: Unlimited mailboxes, white labeling
Apollo wins on: Database, dialer, analytics
Saleshandy wins on: Sender rotation, unified inbox
Apollo vs Klenty
Apollo wins on: Lead database, free plan
Klenty wins on: LinkedIn automation, team reports
More of Maildoso Compared
Here’s how Maildoso stacks up against other competitors:
Maildoso wins on: Lower cost per mailbox, domain management
Instantly wins on: Built-in sequencer, lead finder
Maildoso wins on: Mailbox scaling, infrastructure focus
Snov wins on: Email finder, drip campaigns
Maildoso vs Hunter IO
Maildoso wins on: Sending infrastructure, IP rotation
Hunter IO wins on: Email finding, verification
Maildoso vs Reply IO
Maildoso wins on: Cost per mailbox, domain protection
Reply IO wins on: Multichannel outreach, AI features
Maildoso wins on: Infrastructure scaling, pricing
Lemlist wins on: Personalization, landing pages
Maildoso wins on: Bulk mailbox creation, cost
Woodpecker wins on: Sequencing features, A/B testing
Maildoso wins on: Pure infrastructure, simplicity
Smartlead wins on: All-in-one solution, white label
Maildoso wins on: Full infrastructure, domain setup
Warmbox wins on: Warmup specialization, pricing
Maildoso vs Manyreach
Maildoso wins on: Established platform, integrations
Manyreach wins on: AI segmentation, credit pricing
Maildoso vs Warmy
Maildoso wins on: Full email infrastructure
Warmy wins on: Warmup features, deliverability testing
Frequently Asked Questions
What is Apollo email marketing?
Apollo is a sales intelligence platform that combines a B2B contact database with email outreach tools. It’s not traditional email marketing software. Sales teams use Apollo to find leads, send cold emails, and track engagement across the sales cycle.
What is Maildoso?
Maildoso is cold email infrastructure that helps you create and manage multiple mailboxes for outreach. It automates domain setup, DNS configuration, and IP rotation. You need a separate tool like Instantly or Smartlead to actually send email sequences.
Is Apollo good for emails?
Apollo is good for finding email addresses and sending sequences to verified contacts. However, deliverability rates hover around 65-78% according to user reviews. For high-volume cold email, many users add dedicated infrastructure like Maildoso.
What is cold email infrastructure?
Cold email infrastructure refers to the technical setup for sending cold emails at scale. This includes multiple domains, mailboxes, DNS records, IP addresses, and warmup systems. Tools like Maildoso automate this setup to protect your sender reputation.
Is Apollo.io really free?
Yes, Apollo offers a free forever plan with limited credits. You get 5 mobile credits and 10 export credits per month. Email credits are limited by a fair use policy. To unlock more features and credits, you need a paid plan starting at $49/month.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 