ContactOut vs MailerCheck: Data Enrichment Tool Comparison
Compare ContactOut and MailerCheck side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
ContactOut and MailerCheck both start free but serve different purposes: ContactOut is an email and phone finder with a LinkedIn browser extension, AI email campaigns, and a 700M+ profile bulk license, while MailerCheck is an email list verification and deliverability testing tool. The right choice depends on budget, team size, and which specific capabilities matter most.
Key takeaways
- ContactOut's Free plan offers 5 emails, 5 phones, and 5 exports per day, while its Email plan costs $49/mo for 300 exports per month with unlimited emails.
- ContactOut's Email + Phone plan costs $99/mo for 600 exports per month with unlimited emails and phones.
- MailerCheck gives 10 free credits on a new account for Email List Verification only, and Pay as you go starts at 1,000 credits for $0.01 per credit.
- ContactOut offers 4 pricing tiers compared to MailerCheck's 2 tiers, giving more granularity as usage scales.
- ContactOut integrates with Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail, and Outlook, while MailerCheck integrates with MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make.
Reviewed and updated September 4, 2026
ContactOut vs MailerCheck: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, ContactOut and MailerCheck will likely both appear on your radar. They share some surface-level similarities, but the details reveal important differences in pricing, capability, and target audience.
The Quick Answer
By each vendor's own wording, ContactOut lists one user per company limit on free, email and email + phone plans and browser extension for linkedin, while MailerCheck lists email list verification and email insights. A capability both offer can appear under different names, so read both feature lists below.
Both start at the same price point ($0/mo), so the decision comes down to features and workflow fit.
If your priority is finding accurate contact data for target accounts, both tools target it. The right choice depends on your budget, team size, and the specific capabilities you need most.
Understanding the Core Difference
ContactOut is Email and phone finder with a LinkedIn-focused browser extension, AI-powered email campaigns, and a 700M+ profile bulk license on the Team plan.
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
ContactOut Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Free | Free | 5 emails, 5 phones and 5 exports per day | 5 emails / day |
| $49/mo | 300 exports / month | Unlimited emails | |
| Email + Phone | $99/mo | 600 exports / month | Unlimited emails and unlimited phones |
| Team / API | Contact Sales | Bulk license, 700M+ profiles | Contact us |
Source: ContactOut 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
Both platforms start at the same $0/mo price point. The decision comes down to which feature set and tier structure works better for your expected usage.
ContactOut offers 4 pricing tiers compared to MailerCheck's 2, giving you more granularity as you scale.
Both platforms offer free tiers, so you can test each one before spending anything.
Features Breakdown
- One user per company limit on Free, Email and Email + Phone plans
- Browser extension for LinkedIn
- Email campaigns
- AI email writer
- Data enrichment
- List builder
- 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
ContactOut Key Features
- One user per company limit on Free, Email and Email + Phone plans
- Browser extension for LinkedIn
- Email campaigns
- AI email writer
- Data enrichment
- List builder
- Search portal
- Bulk license (700M+ profiles on Team)
- CSV export
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 ContactOut
- One user per company limit on Free, Email and Email + Phone plans
- Browser extension for LinkedIn
- Email campaigns
- AI email writer
- Data enrichment
- List builder
- Search portal
- Bulk license (700M+ profiles on Team)
- CSV export
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
ContactOut Integrations
ContactOut connects with: Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail, Outlook.
MailerCheck Integrations
MailerCheck connects with: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
Shared Integrations
Both tools integrate with: Zapier.
Integrations listed only by ContactOut: Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Gmail, Outlook.
Integrations listed only by MailerCheck: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Make.
Use Case Recommendations
Best Fit for ContactOut
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that need a wide feature set (9 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (8 integrations)
- Teams that want to start free and scale up as needs grow
- Enterprise buyers who prefer custom pricing and dedicated support
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 | ContactOut | MailerCheck |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Contact Sales | Usage-based |
| Total Features Listed | 9 | 8 |
| Integrations | 8 | 7 |
| Founded | 2015 | N/A |
Getting Started Checklist
- Define your B2B lead data and contact enrichment requirements and monthly budget
- Estimate your expected 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
ContactOut and MailerCheck both serve the B2B lead data and contact enrichment market. ContactOut offers a more accessible entry point, while MailerCheck starts at $0/mo. 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 ContactOut and MailerCheck for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between ContactOut and MailerCheck?
- ContactOut is an email and phone finder built around a LinkedIn-focused browser extension, AI-powered email campaigns, and a 700M+ profile bulk license on its Team plan. MailerCheck is an email list verification and deliverability testing tool that validates single addresses or bulk lists through an API and tests inbox placement before sending.
- How much does ContactOut cost compared to MailerCheck?
- Both tools start free. ContactOut's Email plan costs $49/mo for 300 exports monthly with unlimited emails, and Email + Phone costs $99/mo for 600 exports with unlimited emails and phones. MailerCheck offers 10 free credits for email list verification and a pay as you go tier starting at 1,000 credits at $0.01 per credit.
- Which integrations does ContactOut support?
- ContactOut connects with Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail, and Outlook. This gives it 8 listed integrations, more suited to organizations with complex tech stacks needing broad integration support.
- Which integrations does MailerCheck support?
- MailerCheck connects with MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make, totaling 7 listed integrations. Zapier is the only integration shared between MailerCheck and ContactOut.
- Who should choose MailerCheck over ContactOut?
- MailerCheck fits budget-conscious teams that want to start free and scale up, along with revenue operations teams building targeted prospect lists and marketing teams enriching CRM data for segmentation. ContactOut instead suits teams needing a wider feature set, broader integrations, or enterprise custom pricing.
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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