mailfloss vs MillionVerifier: Data Enrichment Tool Comparison
Compare mailfloss and MillionVerifier side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
mailfloss and MillionVerifier are both email verification tools, but they differ in pricing and approach. mailfloss starts at $29 per month for 10,000 credits and connects to email marketing platforms to clean lists daily on autopilot. MillionVerifier offers a free account with 100 credits and charges usage based rates for bulk and single email verification.
Key takeaways
- mailfloss's entry plan, Lite, costs $29 per month and includes 10,000 credits.
- MillionVerifier offers a free account with 100 free credits and a pay as you go plan covering 50,000 emails.
- mailfloss lists four pricing tiers while MillionVerifier lists two.
- Both tools integrate with Mailchimp, HubSpot, AWeber, Drip, MailerLite, Campaign Monitor, and GetResponse.
- mailfloss lists features such as Zapier integration, real-time API, and webhooks, while MillionVerifier lists EverClean automatic email verification and credits that never expire.
Reviewed and updated September 4, 2026
mailfloss vs MillionVerifier: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, mailfloss and MillionVerifier 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, mailfloss lists cleans your list daily and removes addresses that decay over time, while MillionVerifier lists email checker (single) and email list verification (csv). A capability both offer can appear under different names, so read both feature lists below.
MillionVerifier 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
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.
MillionVerifier is Bulk email verification service that cleans uploaded lists, checks single addresses in real time and verifies through an API. Connects to email marketing platforms to import lists and remove bad addresses automatically.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Lite
Free account
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
MillionVerifier Pricing (as of September 2026)
| Plan | Price | Emails |
|---|---|---|
| Free account | Free | 100 free credits |
| Pay as you go | Usage-based | 50,000 emails |
Source: MillionVerifier Pricing
Pricing Analysis
MillionVerifier offers the lower entry point ($0/mo vs $29/mo). Teams watching their budget will appreciate the savings, especially when starting out.
mailfloss offers 4 pricing tiers compared to MillionVerifier's 2, giving you more granularity as you scale.
MillionVerifier includes a free tier, which is helpful for evaluating the platform without upfront cost.
Features Breakdown
- 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
- Email Checker (single)
- Email List Verification (CSV)
- Bulk Verifier
- Email Verifier API
- ESP integrations import
- Risky email refund
- and 2 more listed below
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
MillionVerifier Key Features
- Email Checker (single)
- Email List Verification (CSV)
- Bulk Verifier
- Email Verifier API
- ESP integrations import
- Risky email refund
- EverClean automatic email verification
- Credits never expire
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 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
Listed only by MillionVerifier
- Email Checker (single)
- Email List Verification (CSV)
- Bulk Verifier
- Email Verifier API
- ESP integrations import
- Risky email refund
- EverClean automatic email verification
- Credits never expire
Integration Ecosystem
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.
MillionVerifier Integrations
MillionVerifier connects with: Mailchimp, Hubspot, Zoho CRM, Getresponse, AWeber, MailerLite, Drip, Campaign Monitor, Mailgun, Mailjet.
Shared Integrations
Both tools integrate with: Mailchimp, HubSpot, AWeber, Drip, MailerLite, Campaign Monitor, GetResponse.
Integrations listed only by mailfloss: Klaviyo, ActiveCampaign, Kit, beehiiv, GoHighLevel, Braze, Constant Contact, Brevo, Ontraport, iContact, Sendlane, Moosend, Keap, Intercom, Customer.io, Iterable, Ghost, Emma, SendPulse, Benchmark, Mautic, Zapier.
Integrations listed only by MillionVerifier: Zoho CRM, Mailgun, Mailjet.
Use Case Recommendations
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
Best Fit for MillionVerifier
- 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 | mailfloss | MillionVerifier |
|---|---|---|
| Starting Price | $29/mo | Free |
| Top Tier Price | Usage-based | Usage-based |
| Total Features Listed | 10 | 8 |
| Integrations | 29 | 10 |
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
mailfloss and MillionVerifier both serve the B2B lead data and contact enrichment market. MillionVerifier 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 mailfloss and MillionVerifier for current information.
Frequently asked questions.
Frequently asked questions- What is the price difference between mailfloss and MillionVerifier?
- MillionVerifier offers a free account entry point with 100 free credits, while mailfloss starts at $29 per month for its Lite plan covering 10,000 credits per month. MillionVerifier also offers a pay as you go plan covering 50,000 emails on a usage based pricing model.
- Does mailfloss or MillionVerifier have more pricing tiers?
- mailfloss offers four pricing tiers, Lite, Business, Pro, and prepaid credits, compared to MillionVerifier's two tiers, a free account and a pay as you go plan. This gives mailfloss more granularity for teams as they scale their credit usage.
- What integrations do mailfloss and MillionVerifier share?
- mailfloss and MillionVerifier both integrate with Mailchimp, HubSpot, AWeber, Drip, MailerLite, Campaign Monitor, and GetResponse. Beyond those shared integrations, mailfloss connects with additional platforms like Klaviyo, ActiveCampaign, and Zapier, while MillionVerifier adds Zoho CRM, Mailgun, and Mailjet.
- Which tool is better for a budget conscious team just starting out?
- MillionVerifier is positioned as the lower cost entry option, with a free account tier including 100 free credits, making it useful for evaluating the platform without upfront cost. mailfloss's lowest tier costs $29 per month, so teams with no budget for verification tools may prefer starting with MillionVerifier's free tier.
- What core features does each tool list that the other does not?
- mailfloss lists features including custom keep and remove rules, Zapier integration, real-time API, webhooks, automatic typo fixing, and single sign-on. MillionVerifier lists features including Email Checker for single addresses, Email List Verification via CSV, a Bulk Verifier, risky email refunds, EverClean automatic verification, and credits that never expire.
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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