MailerCheck vs mailfloss: Data Enrichment Tool Comparison
Compare MailerCheck and mailfloss side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
MailerCheck and mailfloss are both email verification tools, but MailerCheck starts free with pay-as-you-go credits at $0.01 each, while mailfloss starts at $29/mo for 10,000 monthly credits. MailerCheck focuses on list verification, deliverability testing, and inbox placement, while mailfloss automates daily list cleaning across a much wider range of email platform integrations.
Key takeaways
- MailerCheck offers a free entry tier while mailfloss starts at $29 per month for its Lite plan.
- MailerCheck pay-as-you-go pricing charges $0.01 per credit, with 1 credit equal to 1 email verification.
- mailfloss offers four pricing tiers, including Lite at $29/mo for 10,000 credits, Business at $59/mo for 25,000 credits, and Pro at $209/mo for 125,000 credits.
- MailerCheck lists 7 integrations including MailerLite, Mailchimp, and Zapier, while mailfloss lists 29 integrations including Klaviyo, HubSpot, and Intercom.
- Both tools share 5 integrations in common: MailerLite, Mailchimp, ActiveCampaign, GetResponse, and Zapier.
Reviewed and updated September 4, 2026
MailerCheck vs mailfloss: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, MailerCheck and mailfloss 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, MailerCheck lists email list verification and email insights, while mailfloss lists cleans your list daily and removes addresses that decay over time. A capability both offer can appear under different names, so read both feature lists below.
MailerCheck offers a lower entry point at $0/mo compared to mailfloss at $29/mo.
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
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.
mailfloss is mailfloss is an email verification service that connects to your email marketing platform and cleans the list daily on autopilot, removing bad addresses, fixing typos and blocking bot and spam signups in real time. Subscriptions are sized by credits per month; prepaid credits cover one-time list uploads.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Free credits
Lite
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
mailfloss Pricing (as of September 2026)
| Plan | Price | Emails |
|---|---|---|
| Lite | $29/mo | 10,000 credits/month |
| Business | $59/mo | 25,000 credits/month |
| Pro | $209/mo | 125,000 credits/month |
| Prepaid credits | Usage-based | - |
Source: mailfloss Pricing
Pricing Analysis
MailerCheck is more affordable at the entry level ($0/mo vs $29/mo). For teams with tight budgets or those just getting started with B2B lead data and contact enrichment, this price difference matters.
mailfloss offers 4 pricing tiers compared to MailerCheck's 2, giving you more granularity as you scale.
MailerCheck includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- and 2 more listed below
- Cleans your list daily
- Removes addresses that decay over time
- Custom keep and remove rules
- Zapier integration
- Real-time API
- Webhooks
- and 4 more listed below
MailerCheck Key Features
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- Credits and autopay
- Statuses
mailfloss Key Features
- Cleans your list daily
- Removes addresses that decay over time
- Custom keep and remove rules
- Zapier integration
- Real-time API
- Webhooks
- Automatically fixes typos
- Prevents bounces in real-time
- Auto-tags subscribers after verification
- Single sign-on
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 MailerCheck
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- Credits and autopay
- Statuses
Listed only by mailfloss
- Cleans your list daily
- Removes addresses that decay over time
- Custom keep and remove rules
- Zapier integration
- Real-time API
- Webhooks
- Automatically fixes typos
- Prevents bounces in real-time
- Auto-tags subscribers after verification
- Single sign-on
Integration Ecosystem
MailerCheck Integrations
MailerCheck connects with: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
mailfloss Integrations
mailfloss connects with: Mailchimp, Klaviyo, HubSpot, ActiveCampaign, Kit, beehiiv, GoHighLevel, Braze, AWeber, Drip, MailerLite, Constant Contact, Brevo, Campaign Monitor, GetResponse, Ontraport, iContact, Sendlane, Moosend, Keap, Intercom, Customer.io, Iterable, Ghost, Emma, SendPulse, Benchmark, Mautic, Zapier.
Shared Integrations
Both tools integrate with: MailerLite, Mailchimp, ActiveCampaign, GetResponse, Zapier.
Integrations listed only by MailerCheck: ConvertKit, Make.
Integrations listed only by mailfloss: Klaviyo, HubSpot, Kit, beehiiv, GoHighLevel, Braze, AWeber, Drip, Constant Contact, Brevo, Campaign Monitor, Ontraport, iContact, Sendlane, Moosend, Keap, Intercom, Customer.io, Iterable, Ghost, Emma, SendPulse, Benchmark, Mautic.
Use Case Recommendations
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
Best Fit for mailfloss
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that need a wide feature set (10 capabilities listed)
- Organizations with complex tech stacks needing broad integration support (29 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | MailerCheck | mailfloss |
|---|---|---|
| Starting Price | Free | $29/mo |
| Top Tier Price | Usage-based | Usage-based |
| Total Features Listed | 8 | 10 |
| Integrations | 7 | 29 |
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
MailerCheck and mailfloss both serve the B2B lead data and contact enrichment market. MailerCheck offers a more accessible entry point, while mailfloss starts at $29/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 MailerCheck and mailfloss for current information.
Frequently asked questions.
Frequently asked questions- What is the main pricing difference between MailerCheck and mailfloss?
- MailerCheck has a free entry plan with 10 free credits, then pay-as-you-go pricing at $0.01 per credit. mailfloss requires a paid subscription starting at $29/mo for its Lite plan, which includes 10,000 credits per month. This makes MailerCheck the more affordable option for budget-conscious teams just getting started.
- Which tool has more integrations, MailerCheck or mailfloss?
- mailfloss lists significantly more integrations than MailerCheck. MailerCheck connects with 7 platforms including MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make. mailfloss connects with 29 platforms, including Klaviyo, HubSpot, Braze, Intercom, and Customer.io, among others.
- Does mailfloss clean email lists automatically?
- Yes, mailfloss is built around automating list cleaning. According to its own feature list, it cleans your list daily on autopilot, removes addresses that decay over time, automatically fixes typos, and blocks bot and spam signups in real time.
- What does MailerCheck offer that mailfloss does not list?
- MailerCheck lists features such as email list verification, email insights, inbox placement testing, real-time API verification, usage reports, single address verification, credits and autopay, and statuses. These specific feature names are listed only by MailerCheck and not by mailfloss, based on each vendor's own wording.
- How many pricing tiers does each tool offer?
- MailerCheck offers 2 pricing options: a free credits tier and a pay-as-you-go usage-based tier. mailfloss offers 4 pricing tiers: Lite at $29/mo, Business at $59/mo, Pro at $209/mo, and a usage-based prepaid credits option.
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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