11x vs MailerCheck: Sales Engagement Platform vs Data Enrichment Tool Comparison
Compare 11x (sales engagement platform) and MailerCheck (data enrichment tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
11x is a sales engagement platform built around AI digital workers for multi-channel outreach and inbound qualification, while MailerCheck is an email list verification and deliverability tool. 11x uses custom, contact-sales pricing across three tiers; MailerCheck starts free with 10 credits then moves to pay-as-you-go at $0.01 per credit. Many teams use both together rather than choosing one.
Key takeaways
- 11x offers three pricing tiers (Growth, Pro, Enterprise), all priced through Contact Sales rather than published list prices.
- MailerCheck offers a free tier with 10 credits for email list verification, then a pay-as-you-go tier starting at 1,000 credits for $0.01 per credit.
- 11x lists nine features including Multi-Channel Sequences, Sequence Builder, Consented Outbound Calling, and Deep Research.
- MailerCheck lists eight features including Email list verification, Email Insights, Inbox Placement, and Real-time API verification.
- 11x integrates with Salesforce, HubSpot, Pipedrive, Zoho, Gmail, Slack, and G2, while MailerCheck integrates with MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make.
Reviewed and updated September 5, 2026
11x vs MailerCheck: Sales Engagement Platform vs Data Enrichment Tool Comparison
11x (sales engagement platform) and MailerCheck (data enrichment tool) sit next to each other in many outbound stacks. They are not substitutes for each other on every job, so this comparison covers pricing, features, and integrations for each and points out where the two meet.
The Quick Answer
11x is a sales engagement platform for multi-channel sales outreach and engagement tracking; MailerCheck is a data enrichment tool for B2B lead data and contact enrichment. By each vendor's own wording, 11x lists multi-channel sequences and sequence builder, and MailerCheck lists email list verification and email insights.
MailerCheck publishes an entry price of $0/mo; 11x uses custom pricing, so the two cannot be compared on list price.
If your priority is coordinating outreach across email, phone, and social channels, 11x is the one built for it; for finding accurate contact data for target accounts, that is MailerCheck. Many teams run one of each.
Understanding the Core Difference
11x is AI digital worker platform for pipeline generation, built around Alice for outbound and Julian for inbound. Alice runs multi-channel sequences with deep research and AI personalization, consented outbound calling and managed mailboxes, while Julian qualifies inbound leads across phone, chat, SMS and WhatsApp.
MailerCheck is Email list verification and deliverability testing tool that validates single addresses, bulk lists or new signups through an API, and tests email content and inbox placement before a send.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Growth
Free credits
11x Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Growth | Contact Sales | Up to 5 End Users; 2,000 New Prospects per Month | 11x Managed Gmail Mailboxes, including domain setup, warmup, inbox rotation and monitoring |
| Pro | Contact Sales | Up to 10 End Users; 5,000 New Prospects per Month | 11x Managed Gmail Mailboxes; Multi-language Outreach (105+) |
| Enterprise | Contact Sales | Unlimited End Users; 10,000+ Prospects per Month | 11x Managed Gmail Mailboxes; Custom Integrations + API |
Source: 11x Pricing
MailerCheck Pricing (as of September 2026)
| Plan | Price | Emails |
|---|---|---|
| Free credits | Free | 10 free credits on a new account, for Email List Verification only |
| Pay as you go | Usage-based | 1,000 credits at the entry step, at $0.01 per credit; 1 credit = 1 email verification |
Source: MailerCheck Pricing
Pricing Analysis
One or both platforms use custom or contact-based pricing for some tiers. Reach out to their sales teams for exact quotes based on your usage needs.
11x offers 3 pricing tiers compared to MailerCheck's 2, giving you more granularity as you scale.
MailerCheck includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- Multi-Channel Sequences
- Sequence Builder
- Smart Replies
- Multi-Lingual Outreach
- Consented Outbound Calling
- Deep Research
- and 3 more listed below
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- and 2 more listed below
11x Key Features
- Multi-Channel Sequences
- Sequence Builder
- Smart Replies
- Multi-Lingual Outreach
- Consented Outbound Calling
- Deep Research
- AI Personalization
- Signals and Triggers
- Deliverability & Mailbox Health
MailerCheck Key Features
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- Credits and autopay
- Statuses
The two lists below are a diff of each vendor's own feature list by exact wording, so a capability both tools offer can appear on either side under a different name.
Listed only by 11x
- Multi-Channel Sequences
- Sequence Builder
- Smart Replies
- Multi-Lingual Outreach
- Consented Outbound Calling
- Deep Research
- AI Personalization
- Signals and Triggers
- Deliverability & Mailbox Health
Listed only by MailerCheck
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- Credits and autopay
- Statuses
Integration Ecosystem
11x Integrations
11x connects with: Salesforce, HubSpot, Pipedrive, Zoho, Gmail, Slack, G2.
MailerCheck Integrations
MailerCheck connects with: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
Integrations listed only by 11x: Salesforce, HubSpot, Pipedrive, Zoho, Gmail, Slack, G2.
Integrations listed only by MailerCheck: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
Use Case Recommendations
Best Fit for 11x
- Teams that need a wide feature set (9 capabilities listed)
- Enterprise buyers who prefer custom pricing and dedicated support
- SDR teams running multi-channel outreach sequences
- Sales managers tracking team engagement metrics
Best Fit for MailerCheck
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that want to start free and scale up as needs grow
- Revenue operations teams building targeted prospect lists
- Marketing teams enriching CRM data for segmentation
Feature Comparison Summary
| Feature | 11x | MailerCheck |
|---|---|---|
| Starting Price | Contact Sales | Free |
| Top Tier Price | Contact Sales | Usage-based |
| Total Features Listed | 9 | 8 |
| Integrations | 7 | 7 |
Getting Started Checklist
- Define your multi-channel sales outreach and engagement tracking and B2B lead data and contact enrichment requirements and monthly budget
- Estimate your expected sequences and engagement actions and data credits or contact lookups to find the right tier
- List the integrations your team currently relies on
- Sign up for free trials or demos of both platforms
- Run a small test with each tool before making a commitment
- Evaluate the onboarding experience and support quality
Final Thoughts
11x serves the multi-channel sales outreach and engagement tracking side of an outbound stack and MailerCheck the B2B lead data and contact enrichment side. MailerCheck publishes an entry price (a free tier), while 11x uses custom pricing for its plans, so compare on features and on the quote you receive. Your decision should weigh pricing against the specific features that matter most for your workflow.
Start with a trial of each to see which platform fits your team's daily process. The best tool is the one your team actually uses consistently.
Pricing and features verified as of September 2026. Visit 11x and MailerCheck for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between 11x and MailerCheck?
- 11x is a sales engagement platform for multi-channel outreach and engagement tracking, built around AI digital workers Alice and Julian. MailerCheck is a data enrichment and email verification tool that validates addresses and lists and tests inbox placement before sending. They serve different jobs in the outbound stack rather than competing directly.
- How much does 11x cost compared to MailerCheck?
- 11x does not publish list prices and requires contacting sales for its Growth, Pro, and Enterprise tiers. MailerCheck publishes an entry price of $0 per month with 10 free verification credits, then moves to pay-as-you-go pricing at $0.01 per credit starting at 1,000 credits. The two cannot be directly compared on list price.
- Which tool is better for multi-channel outreach?
- 11x is built for multi-channel outreach, listing features like Multi-Channel Sequences, Sequence Builder, Consented Outbound Calling, and Smart Replies. MailerCheck does not offer outreach sequencing features and instead focuses on verifying email lists and testing deliverability before a send.
- Can I use 11x and MailerCheck together?
- Yes, many teams run both tools together since they address different needs in the outbound workflow. 11x handles multi-channel sequencing and engagement tracking, while MailerCheck handles verifying contact data and testing email deliverability, so they can complement rather than replace each other.
- What integrations does each platform support?
- 11x connects with Salesforce, HubSpot, Pipedrive, Zoho, Gmail, Slack, and G2. MailerCheck connects with MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make. The integration lists do not overlap based on each vendor's published information.
About the author.
Tim Carden is CMO / CTO at RevenueFlow, which builds and operates outbound revenue engines for B2B companies. Studied at McGill University.
Tim Carden · CMO / CTO
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