Closely vs mailfloss: Sales Engagement Platform vs Data Enrichment Tool Comparison
Compare Closely (sales engagement platform) and mailfloss (data enrichment tool) side by side. See pricing, features, and integrations to decide which one, or both, your stack needs.
Closely is a sales engagement platform for multi-channel outreach across LinkedIn and email, priced from $49 per month. mailfloss is a data enrichment tool that cleans email lists daily, priced from $29 per month. Teams needing coordinated outbound campaigns pick Closely, teams needing accurate contact data pick mailfloss, and many run both.
Key takeaways
- Closely's Starter plan costs $49/mo and includes 1 LinkedIn account with unlimited email accounts.
- mailfloss's Lite plan costs $29/mo and includes 10,000 credits per month.
- Closely's Growth plan costs $127/mo and includes 3 LinkedIn accounts plus 3,000 bonus credits per month.
- mailfloss's Pro plan costs $209/mo and includes 125,000 credits per month.
- Both Closely and mailfloss list HubSpot and GoHighLevel as integrations, making these shared connection points between the two tools.
Reviewed and updated September 4, 2026
Closely vs mailfloss: Sales Engagement Platform vs Data Enrichment Tool Comparison
Sales teams building an outbound stack often weigh Closely, a sales engagement platform for multi-channel sales outreach and engagement tracking, against mailfloss, a data enrichment tool for B2B lead data and contact enrichment. 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
Closely is a sales engagement platform for multi-channel sales outreach and engagement tracking; mailfloss is a data enrichment tool for B2B lead data and contact enrichment. By each vendor's own wording, Closely lists multichannel campaigns across linkedin and email and conditional sequence builder, and mailfloss lists cleans your list daily and removes addresses that decay over time.
mailfloss offers a lower entry point at $29/mo compared to Closely at $49/mo.
If your priority is coordinating outreach across email, phone, and social channels, Closely is the one built for it; for finding accurate contact data for target accounts, that is mailfloss. Many teams run one of each.
Understanding the Core Difference
Closely is Outbound platform that runs automated campaigns across LinkedIn and email from a shared sender, with a conditional sequence builder, unified inbox, contact enrichment and AI personalization agents.
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
Starter
Lite
Closely Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Starter | $49/mo | 1 LinkedIn account, unlimited email accounts |
| Growth | $127/mo | 3 LinkedIn accounts, unlimited email accounts, 3,000 bonus credits/mo |
| Essential | $205/mo | 5 LinkedIn accounts, unlimited email accounts, 5,000 bonus credits/mo |
| Custom | Contact Sales | Unlimited seats, custom LinkedIn accounts and credits |
Source: Closely 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
mailfloss offers the lower entry point ($29/mo vs $49/mo). Teams watching their budget will appreciate the savings, especially when starting out.
Features Breakdown
- Multichannel campaigns across LinkedIn and email
- Conditional sequence builder
- Smart Inbox unifying LinkedIn and email replies
- LinkedIn account warmup
- Dedicated residential IP for each LinkedIn account
- OAuth Gmail and Outlook connection plus custom SMTP
- and 4 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
Closely Key Features
- Multichannel campaigns across LinkedIn and email
- Conditional sequence builder
- Smart Inbox unifying LinkedIn and email replies
- LinkedIn account warmup
- Dedicated residential IP for each LinkedIn account
- OAuth Gmail and Outlook connection plus custom SMTP
- Email finder with a multi-step fallback process
- Phone number finder
- AI lead scoring and personalization agents
- Export from Sales Navigator, LinkedIn posts and events
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 Closely
- Multichannel campaigns across LinkedIn and email
- Conditional sequence builder
- Smart Inbox unifying LinkedIn and email replies
- LinkedIn account warmup
- Dedicated residential IP for each LinkedIn account
- OAuth Gmail and Outlook connection plus custom SMTP
- Email finder with a multi-step fallback process
- Phone number finder
- AI lead scoring and personalization agents
- Export from Sales Navigator, LinkedIn posts and events
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
Closely Integrations
Closely connects with: Salesforce, Pipedrive, HubSpot, GoHighLevel, Gmail, Microsoft Outlook, SMTP, Webhooks.
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, GoHighLevel.
Integrations listed only by Closely: Salesforce, Pipedrive, Gmail, Microsoft Outlook, SMTP, Webhooks.
Integrations listed only by mailfloss: Mailchimp, Klaviyo, ActiveCampaign, Kit, beehiiv, 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.
Use Case Recommendations
Best Fit for Closely
- Budget-conscious teams looking for an affordable sales engagement platform
- Enterprise buyers who prefer custom pricing and dedicated support
- SDR teams running multi-channel outreach sequences
- Sales managers tracking team engagement metrics
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
Feature Comparison Summary
| Feature | Closely | mailfloss |
|---|---|---|
| Starting Price | $49/mo | $29/mo |
| Top Tier Price | Contact Sales | Usage-based |
| Total Features Listed | 10 | 10 |
| Integrations | 8 | 29 |
Getting Started Checklist
- Define your multi-channel sales outreach and engagement tracking and B2B lead data and contact enrichment requirements and monthly budget
- Estimate your expected sequences and engagement actions and 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
Closely serves the multi-channel sales outreach and engagement tracking side of an outbound stack and mailfloss the B2B lead data and contact enrichment side. mailfloss offers a more accessible entry point at $29/mo, while Closely starts at $49/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 Closely and mailfloss for current information.
Frequently asked questions.
Frequently asked questions- What's the main difference between Closely and mailfloss?
- Closely is a sales engagement platform built for multi-channel outreach across LinkedIn and email, including a conditional sequence builder and unified inbox. mailfloss is a data enrichment tool that verifies and cleans email lists daily, removing bad addresses and fixing typos in real time. They cover different parts of the outbound workflow.
- Which is cheaper, Closely or mailfloss?
- mailfloss has the lower entry price at $29/mo for its Lite plan, compared to Closely's Starter plan at $49/mo. mailfloss's Lite plan includes 10,000 credits per month, while Closely's Starter plan includes 1 LinkedIn account with unlimited email accounts.
- Does Closely integrate with HubSpot?
- Yes, Closely lists HubSpot among its integrations, alongside Salesforce, Pipedrive, GoHighLevel, Gmail, Microsoft Outlook, SMTP, and Webhooks. HubSpot is also listed as a mailfloss integration, making it one of the shared connection points between the two tools.
- How many credits does mailfloss's Business plan include?
- mailfloss's Business plan costs $59/mo and includes 25,000 credits per month. This sits between the Lite plan at $29/mo for 10,000 credits and the Pro plan at $209/mo for 125,000 credits.
- Should a sales team use both Closely and mailfloss?
- Many teams run one of each, since the article notes they cover different parts of the outbound workflow. Closely handles coordinating outreach across email, phone, and social channels, while mailfloss focuses on finding and maintaining accurate contact data for target accounts.
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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