ContactOut vs mailfloss: Data Enrichment Tool Comparison
Compare ContactOut and mailfloss side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
ContactOut is a B2B contact finder offering email and phone lookups through a LinkedIn browser extension, AI email campaigns, and a free $0/mo plan, while mailfloss is an email verification service that cleans mailing lists daily starting at $29/mo for 10,000 credits. Choose ContactOut to find new contacts and mailfloss to keep existing email lists clean.
Key takeaways
- ContactOut's Free plan costs $0/mo and includes 5 emails, 5 phones and 5 exports per day.
- mailfloss's Lite plan costs $29/mo and includes 10,000 credits per month.
- ContactOut's Team/API plan offers a bulk license covering more than 700 million profiles.
- mailfloss's Pro plan costs $209/mo and includes 125,000 credits per month.
- ContactOut and mailfloss share only two listed integrations: HubSpot and Zapier.
Reviewed and updated September 4, 2026
ContactOut vs mailfloss: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, ContactOut 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, ContactOut lists one user per company limit on free, email and email + phone plans and browser extension for linkedin, 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.
ContactOut 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
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.
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
Lite
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
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
ContactOut 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.
ContactOut includes a free tier, letting you test the platform before committing financially.
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
- 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
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
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 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 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
ContactOut Integrations
ContactOut connects with: Salesforce, HubSpot, Greenhouse, Lever, Bullhorn, Zapier, Gmail, Outlook.
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: HubSpot, Zapier.
Integrations listed only by ContactOut: Salesforce, Greenhouse, Lever, Bullhorn, Gmail, Outlook.
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.
Use Case Recommendations
Best Fit for ContactOut
- Budget-conscious teams looking for an affordable data enrichment tool
- Teams that want to start free and scale up as needs grow
- Enterprise buyers who prefer custom pricing and dedicated support
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 | ContactOut | mailfloss |
|---|---|---|
| Starting Price | Free | $29/mo |
| Top Tier Price | Contact Sales | Usage-based |
| Total Features Listed | 9 | 10 |
| Integrations | 8 | 29 |
| 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 mailfloss both serve the B2B lead data and contact enrichment market. ContactOut 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 ContactOut and mailfloss for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between ContactOut and mailfloss?
- ContactOut is an email and phone finder built around a LinkedIn-focused browser extension, AI-powered email campaigns, and a bulk license covering more than 700 million profiles on its Team plan. mailfloss is an email verification service that connects to your email marketing platform and cleans your list daily on autopilot, removing bad addresses and fixing typos.
- How much does ContactOut cost compared to mailfloss?
- ContactOut offers a free plan at $0/mo, then $49/mo for the Email plan and $99/mo for Email + Phone, with Team/API pricing available by contacting sales. mailfloss starts at $29/mo for Lite (10,000 credits/month), then $59/mo for Business and $209/mo for Pro, plus usage-based prepaid credits.
- Do ContactOut and mailfloss integrate with the same tools?
- They only share two listed integrations: HubSpot and Zapier. ContactOut additionally lists Salesforce, Greenhouse, Lever, Bullhorn, Gmail, and Outlook, while mailfloss lists a much larger set of email marketing platforms including Mailchimp, Klaviyo, ActiveCampaign, and many others.
- Which tool is better for cleaning an existing email list?
- mailfloss is built specifically for this purpose. It connects to your email marketing platform and cleans your list daily on autopilot, removing addresses that decay over time, fixing typos, and blocking bot and spam signups in real time.
- Does ContactOut offer a free plan?
- Yes, ContactOut has a Free plan at $0/mo that includes 5 emails, 5 phones and 5 exports per day, plus a browser extension for LinkedIn. mailfloss does not have a free plan listed; its lowest tier is the $29/mo Lite plan with 10,000 credits per month.
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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