FullEnrich vs MailerCheck: Data Enrichment Tool Comparison
Compare FullEnrich and MailerCheck side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
FullEnrich and MailerCheck both start free, but they solve different problems. FullEnrich is a B2B contact enrichment platform offering waterfall enrichment across 25+ sources plus mobile phone data, while MailerCheck is an email verification and deliverability testing tool. The right pick depends on whether you need contact enrichment or email list validation.
Key takeaways
- FullEnrich and MailerCheck both offer a free starting tier at $0/mo.
- FullEnrich's Pro plan costs $55/mo for 1,000 credits per month, while MailerCheck uses pay as you go pricing at $0.01 per credit.
- MailerCheck gives new accounts 10 free credits for Email List Verification only, while FullEnrich's free trial includes 50 credits.
- FullEnrich lists 8 integrations including HubSpot, Clay, and n8n, while MailerCheck lists 7 integrations including MailerLite, Mailchimp, and ActiveCampaign.
- Zapier and Make are the only integrations shared by both FullEnrich and MailerCheck.
Reviewed and updated September 4, 2026
FullEnrich vs MailerCheck: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, FullEnrich 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, FullEnrich lists waterfall enrichment across 25+ sources and mobile phone enrichment, 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
FullEnrich is B2B contact enrichment platform returning verified work emails, personal emails and mobile phone numbers through waterfall enrichment across 25+ data sources. Available in the app, a REST API and an MCP server.
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
FullEnrich Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free trial | Free | 50 credits to start |
| Pro | $55/mo | 1,000 credits / month |
| Enterprise | Contact Sales | Custom |
Source: FullEnrich 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.
FullEnrich offers 3 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
- Waterfall enrichment across 25+ sources
- Mobile Phone Enrichment
- Work Email Enrichment
- Personal Email Enrichment
- Reverse Email Lookup
- Bulk CSV Enrichment
- and 2 more listed below
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- and 2 more listed below
FullEnrich Key Features
- Waterfall enrichment across 25+ sources
- Mobile Phone Enrichment
- Work Email Enrichment
- Personal Email Enrichment
- Reverse Email Lookup
- Bulk CSV Enrichment
- MCP Server
- Unlimited users included
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 FullEnrich
- Waterfall enrichment across 25+ sources
- Mobile Phone Enrichment
- Work Email Enrichment
- Personal Email Enrichment
- Reverse Email Lookup
- Bulk CSV Enrichment
- MCP Server
- Unlimited users included
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
FullEnrich Integrations
FullEnrich connects with: HubSpot, Clay, Zapier, Make, n8n, Claude, OpenAI, Manus.
MailerCheck Integrations
MailerCheck connects with: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
Shared Integrations
Both tools integrate with: Zapier, Make.
Integrations listed only by FullEnrich: HubSpot, Clay, n8n, Claude, OpenAI, Manus.
Integrations listed only by MailerCheck: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit.
Use Case Recommendations
Best Fit for FullEnrich
- Budget-conscious teams looking for an affordable data enrichment tool
- 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 | FullEnrich | MailerCheck |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Contact Sales | Usage-based |
| Total Features Listed | 8 | 8 |
| Integrations | 8 | 7 |
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
FullEnrich and MailerCheck both serve the B2B lead data and contact enrichment market. FullEnrich 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 FullEnrich and MailerCheck for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between FullEnrich and MailerCheck?
- FullEnrich is a B2B contact enrichment platform that returns verified work emails, personal emails, and mobile phone numbers through waterfall enrichment across 25+ data sources. MailerCheck is an email list verification and deliverability testing tool that validates single addresses or bulk lists and tests email content and inbox placement before sending.
- How much does FullEnrich cost compared to MailerCheck?
- Both tools start free. FullEnrich's Pro plan is $55 per month for 1,000 credits, with an Enterprise tier available by contacting sales. MailerCheck uses a pay as you go model starting at 1,000 credits for $0.01 per credit, with 10 free credits included for new accounts on Email List Verification only.
- Which integrations does FullEnrich support that MailerCheck does not?
- FullEnrich lists integrations with HubSpot, Clay, n8n, Claude, OpenAI, and Manus that MailerCheck does not list. Both tools do integrate with Zapier and Make, which are the shared integrations between the two platforms.
- Is FullEnrich or MailerCheck better for revenue operations teams?
- According to the article's use case recommendations, MailerCheck is suited to revenue operations teams building targeted prospect lists and marketing teams enriching CRM data for segmentation. FullEnrich is recommended for budget-conscious teams, organizations needing broad integration support, and enterprise buyers who prefer custom pricing.
- Do both FullEnrich and MailerCheck offer free trials?
- Yes, both platforms offer a free tier so teams can test before paying. FullEnrich's free trial includes 50 credits to start, while MailerCheck gives new accounts 10 free credits limited to Email List Verification only.
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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