Apollo.io vs mailfloss: Data Enrichment Tool Comparison
Compare Apollo.io and mailfloss side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
Apollo.io and mailfloss both target B2B contact data needs but differ sharply: Apollo.io is an all-in-one sales intelligence platform with a 210M+ contact database starting free, while mailfloss is a $29/mo email verification service that cleans email lists daily and removes decaying addresses. The right pick depends on budget and whether you need enrichment or list hygiene.
Key takeaways
- Apollo.io's entry plan is free, while mailfloss's entry plan, Lite, costs $29/mo.
- Apollo.io lists a 210M+ contacts database and 30M+ companies on its own pricing page.
- Apollo.io's paid tiers include Basic at $49/mo, Professional at $79/mo, and Organization at $119/mo.
- mailfloss's paid tiers include Business at $59/mo with 25,000 credits/month and Pro at $209/mo with 125,000 credits/month.
- HubSpot is the only integration shared between Apollo.io and mailfloss according to each vendor's own integration lists.
Reviewed and updated September 4, 2026
Apollo.io vs mailfloss: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, Apollo.io 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, Apollo.io lists 210m+ contacts database and 30m+ companies, 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.
Apollo.io 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
Apollo.io is All-in-one sales intelligence platform with 210M+ contacts, AI-powered campaigns, and built-in email sequencing.
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
Apollo.io Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 900 credits per seat per year, granted monthly |
| Basic | $49/mo | 30,000 credits per seat per year, granted upfront |
| Professional | $79/mo | 48,000 credits per seat per year, granted upfront |
| Organization | $119/mo | 72,000 credits per seat per year, granted upfront |
Source: Apollo.io 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
Apollo.io 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.
Apollo.io includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- 210M+ contacts database
- 30M+ companies
- AI-powered multichannel campaigns
- Email deliverability guardrails
- Anonymous visitor identification
- Real-time form enrichment
- 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
Apollo.io Key Features
- 210M+ contacts database
- 30M+ companies
- AI-powered multichannel campaigns
- Email deliverability guardrails
- Anonymous visitor identification
- Real-time form enrichment
- Contact and company enrichment
- Advanced filtering
- CRM data cleansing
- Pipeline boards
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 Apollo.io
- 210M+ contacts database
- 30M+ companies
- AI-powered multichannel campaigns
- Email deliverability guardrails
- Anonymous visitor identification
- Real-time form enrichment
- Contact and company enrichment
- Advanced filtering
- CRM data cleansing
- Pipeline boards
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
Apollo.io Integrations
Apollo.io connects with: Salesforce, HubSpot, Outreach, SalesLoft, Marketo, SendGrid, LinkedIn.
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.
Integrations listed only by Apollo.io: Salesforce, Outreach, SalesLoft, Marketo, SendGrid, LinkedIn.
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, Zapier.
Use Case Recommendations
Best Fit for Apollo.io
- 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
- Organizations with complex tech stacks needing broad integration support (29 integrations)
- Enterprise buyers who prefer custom pricing and dedicated support
Feature Comparison Summary
| Feature | Apollo.io | mailfloss |
|---|---|---|
| Starting Price | Free | $29/mo |
| Top Tier Price | $119/mo | Usage-based |
| Total Features Listed | 10 | 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
Apollo.io and mailfloss both serve the B2B lead data and contact enrichment market. Apollo.io 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 Apollo.io and mailfloss for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Apollo.io and mailfloss?
- Apollo.io is an all-in-one sales intelligence platform offering a 210M+ contacts database, AI-powered campaigns, and email sequencing, while mailfloss is an email verification service that connects to email marketing platforms and cleans lists daily, removing bad addresses and fixing typos in real time.
- Which is cheaper, Apollo.io or mailfloss?
- Apollo.io is cheaper at the entry level, offering a free plan, while mailfloss's entry plan, Lite, costs $29/mo. Apollo.io's paid plans go up to $119/mo for Organization, and mailfloss's paid plans go up to $209/mo for Pro.
- Do Apollo.io and mailfloss integrate with the same tools?
- They share only one listed integration, HubSpot. Apollo.io also connects with Salesforce, Outreach, SalesLoft, Marketo, SendGrid, and LinkedIn, while mailfloss connects with a much larger list including Mailchimp, Klaviyo, ActiveCampaign, Zapier, and many other email marketing platforms.
- Who should use mailfloss instead of Apollo.io?
- According to the article, the choice depends on budget, team size, and specific capabilities needed. mailfloss focuses specifically on cleaning email lists daily, removing decaying addresses, fixing typos, and preventing bounces in real time, which suits teams prioritizing email list hygiene over broader sales intelligence features.
- Does Apollo.io offer a free plan?
- Yes, Apollo.io offers a free tier at $0/mo, which includes 900 credits per seat per year granted monthly, allowing teams to test the platform before committing financially.
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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