mailfloss vs Overloop AI: Data Enrichment Tool vs Sales Engagement Platform Comparison
Compare mailfloss (data enrichment tool) and Overloop AI (sales engagement platform) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
mailfloss is a data enrichment tool built for B2B lead data and contact enrichment, priced from $29/mo, while Overloop AI is a sales engagement platform built for multi-channel outreach and engagement tracking, priced from $69/mo. Teams needing accurate contact data should choose mailfloss; teams coordinating outreach across email, phone, and social should choose Overloop AI. Many teams use both.
Key takeaways
- mailfloss entry pricing starts at $29/mo for the Lite plan with 10,000 credits per month, while Overloop AI entry pricing starts at $69/mo for the Starter plan with 250 credits per user per month.
- mailfloss offers 4 pricing tiers, including a usage-based prepaid credits option, compared to Overloop AI's 3 tiers.
- Overloop AI lists a 450M+ prospects database along with AI-powered campaigns and AI-powered outreach followups as key features.
- mailfloss lists daily list cleaning, custom keep and remove rules, and single sign-on among its key features.
- Both tools share integrations with HubSpot and Zapier, while mailfloss additionally connects with Mailchimp, Klaviyo, and ActiveCampaign, and Overloop AI additionally connects with Salesforce, Pipedrive, and Slack.
Reviewed and updated September 4, 2026
mailfloss vs Overloop AI: Data Enrichment Tool vs Sales Engagement Platform Comparison
Sales teams building an outbound stack often weigh mailfloss, a data enrichment tool for B2B lead data and contact enrichment, against Overloop AI, a sales engagement platform for multi-channel sales outreach and engagement tracking. They cover different parts of the workflow, so this comparison covers what each one does, what each one costs, and where they overlap.
The Quick Answer
mailfloss is a data enrichment tool for B2B lead data and contact enrichment; Overloop AI is a sales engagement platform for multi-channel sales outreach and engagement tracking. By each vendor's own wording, mailfloss lists cleans your list daily and removes addresses that decay over time, and Overloop AI lists ai-powered campaigns and 450m+ prospects database.
mailfloss offers a lower entry point at $29/mo compared to Overloop AI at $69/mo.
If your priority is finding accurate contact data for target accounts, mailfloss is the one built for it; for coordinating outreach across email, phone, and social channels, that is Overloop AI. Many teams run one of each.
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.
Overloop AI is Sales prospecting platform that finds verified B2B contacts and runs personalized email and social outreach campaigns. Includes a 450M+ B2B contact database, an email finder and verifier, and AI-written campaigns and follow-ups.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
Lite
Starter
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
Overloop AI Pricing (as of September 2026)
| Plan | Price | Contacts | Emails |
|---|---|---|---|
| Starter | $69/mo | 250 credits per month per user | 1 email account per user; 3 campaigns |
| Growth | $99/mo | 500 credits per month per user | 3 email accounts per user; 10 campaigns |
| Enterprise | Contact Sales | 1,000 credits per month per user | Unlimited email accounts; Unlimited campaigns |
Source: Overloop AI Pricing
Pricing Analysis
mailfloss is more affordable at the entry level ($29/mo vs $69/mo). For teams with tight budgets or those just getting started with B2B lead data and contact enrichment and multi-channel sales outreach and engagement tracking, this price difference matters.
mailfloss offers 4 pricing tiers compared to Overloop AI's 3, giving you more granularity as you scale.
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
- AI-powered campaigns
- 450M+ prospects database
- Verified Email Addresses
- Smart multichannel campaigns (Email + social)
- AI-powered Outreach Followups
- Email Finder & Verifier
- and 4 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
Overloop AI Key Features
- AI-powered campaigns
- 450M+ prospects database
- Verified Email Addresses
- Smart multichannel campaigns (Email + social)
- AI-powered Outreach Followups
- Email Finder & Verifier
- Chrome Extension for LinkedIn
- Conversations Inbox
- Email Warmup
- REST API
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 Overloop AI
- AI-powered campaigns
- 450M+ prospects database
- Verified Email Addresses
- Smart multichannel campaigns (Email + social)
- AI-powered Outreach Followups
- Email Finder & Verifier
- Chrome Extension for LinkedIn
- Conversations Inbox
- Email Warmup
- REST API
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.
Overloop AI Integrations
Overloop AI connects with: HubSpot, Salesforce, Pipedrive, Zapier, Slack, Calendly, Gmail, Outlook.
Shared Integrations
Both tools integrate with: HubSpot, Zapier.
Integrations listed only by mailfloss: Mailchimp, Klaviyo, 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.
Integrations listed only by Overloop AI: Salesforce, Pipedrive, Slack, Calendly, Gmail, Outlook.
Use Case Recommendations
Best Fit for mailfloss
- Budget-conscious teams looking for an affordable data enrichment tool
- Organizations with complex tech stacks needing broad integration support (29 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Best Fit for Overloop AI
- Enterprise buyers who prefer custom pricing and dedicated support
- SDR teams running multi-channel outreach sequences
- Sales managers tracking team engagement metrics
- Revenue teams coordinating email, phone, and social touches
Feature Comparison Summary
| Feature | mailfloss | Overloop AI |
|---|---|---|
| Starting Price | $29/mo | $69/mo |
| Top Tier Price | Usage-based | Contact Sales |
| Total Features Listed | 10 | 10 |
| Integrations | 29 | 8 |
| Founded | N/A | 2015 |
Getting Started Checklist
- Define your B2B lead data and contact enrichment and multi-channel sales outreach and engagement tracking requirements and monthly budget
- Estimate your expected data credits or contact lookups and sequences and engagement actions 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 serves the B2B lead data and contact enrichment side of an outbound stack and Overloop AI the multi-channel sales outreach and engagement tracking side. mailfloss offers a more accessible entry point at $29/mo, while Overloop AI starts at $69/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 Overloop AI for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between mailfloss and Overloop AI?
- mailfloss is a data enrichment tool focused on B2B lead data and contact enrichment, while Overloop AI is a sales engagement platform focused on multi-channel sales outreach and engagement tracking. They cover different parts of the outbound workflow, so many teams use both rather than choosing one over the other.
- How much does mailfloss cost compared to Overloop AI?
- mailfloss starts at $29/mo for its Lite plan with 10,000 credits per month, while Overloop AI starts at $69/mo for its Starter plan with 250 credits per user per month. mailfloss also offers a Business plan at $59/mo and a Pro plan at $209/mo, plus usage-based prepaid credits.
- Which tool is better for finding accurate contact data?
- mailfloss is built for finding accurate contact data and cleaning B2B lead lists, listing features like daily list cleaning, custom keep and remove rules, and real-time bounce prevention. It connects to your email marketing platform and cleans the list daily on autopilot.
- Which tool is better for multi-channel outreach?
- Overloop AI is built for multi-channel sales outreach and engagement tracking, listing features like AI-powered campaigns, smart multichannel campaigns across email and social, and a 450M+ prospects database. It also includes a Chrome extension for LinkedIn and an email finder and verifier.
- Do mailfloss and Overloop AI integrate with the same tools?
- Both tools share integrations with HubSpot and Zapier. Beyond that, mailfloss connects with additional platforms like Mailchimp, Klaviyo, and ActiveCampaign, while Overloop AI connects with additional platforms like Salesforce, Pipedrive, Slack, Calendly, Gmail, and Outlook.
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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