MailerCheck vs Prospeo: Data Enrichment Tool Comparison
Compare MailerCheck and Prospeo side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
MailerCheck is an email list verification and deliverability testing tool with pay-as-you-go pricing at $0.01 per credit, while Prospeo is a B2B lead search and data enrichment platform with four paid tiers up to $249 per month. Both offer free starting tiers at $0 per month, so the choice depends on whether you need email verification or broader contact enrichment and integrations.
Key takeaways
- Both MailerCheck and Prospeo offer a free tier starting at $0 per month.
- Prospeo offers 4 pricing tiers (Free, $49/mo Starter, $99/mo Growth, $249/mo Pro) compared to MailerCheck's 2 pricing options.
- MailerCheck's pay as you go plan charges $0.01 per credit, with 1 credit equal to 1 email verification.
- MailerCheck integrates with 7 tools including MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make.
- Prospeo integrates with 10 tools including Salesforce, HubSpot, Pipedrive, Zoho, Close, monday.com, Smartlead, Instantly, Lemlist, and Salesloft.
Reviewed and updated September 5, 2026
MailerCheck vs Prospeo: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, MailerCheck and Prospeo 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, MailerCheck lists email list verification and email insights, while Prospeo lists people & company search and ai search & lookalikes. A capability both offer can appear under different names, so read both feature lists below.
Both start at the same price point ($0/mo), so the decision comes down to features and workflow fit.
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
MailerCheck is Email list verification and deliverability testing tool that validates single addresses, bulk lists or new signups through an API, and tests email content and inbox placement before a send.
Prospeo is B2B lead search and data enrichment platform for verified work emails, direct mobile numbers, intent signals, and CRM data enrichment.
The two platforms take different approaches to solving the same core challenge.
Pricing Comparison
MailerCheck Pricing (as of September 2026)
| Plan | Price | Emails |
|---|---|---|
| Free credits | Free | 10 free credits on a new account, for Email List Verification only |
| Pay as you go | Usage-based | 1,000 credits at the entry step, at $0.01 per credit; 1 credit = 1 email verification |
Source: MailerCheck Pricing
Prospeo Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free | Free | 100 credits per month |
| Starter | $49/mo | 2,000 credits per user per month; 24,000 per user per year on yearly billing |
| Growth | $99/mo | 5,000 credits per user per month; 60,000 per user per year on yearly billing |
| Pro | $249/mo | 15,000 credits per user per month; 180,000 per user per year on yearly billing |
Source: Prospeo Pricing
Pricing Analysis
Both platforms start at the same $0/mo price point. The decision comes down to which feature set and tier structure works better for your expected usage.
Prospeo offers 4 pricing tiers compared to MailerCheck's 2, giving you more granularity as you scale.
Both platforms offer free tiers, so you can test each one before spending anything.
Features Breakdown
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- and 2 more listed below
- People & Company Search
- AI Search & Lookalikes
- Chrome Extension
- CRM Data Enrichment
- Find mobile numbers
- Intent Signals
- and 2 more listed below
MailerCheck Key Features
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- Credits and autopay
- Statuses
Prospeo Key Features
- People & Company Search
- AI Search & Lookalikes
- Chrome Extension
- CRM Data Enrichment
- Find mobile numbers
- Intent Signals
- CSV & API Enrichment
- Unused credits rollover
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 MailerCheck
- Email list verification
- Email Insights
- Inbox Placement
- Real-time API verification
- Usage report
- Single address verification
- Credits and autopay
- Statuses
Listed only by Prospeo
- People & Company Search
- AI Search & Lookalikes
- Chrome Extension
- CRM Data Enrichment
- Find mobile numbers
- Intent Signals
- CSV & API Enrichment
- Unused credits rollover
Integration Ecosystem
MailerCheck Integrations
MailerCheck connects with: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
Prospeo Integrations
Prospeo connects with: Salesforce, HubSpot, Pipedrive, Zoho, Close, monday.com, Smartlead, Instantly, Lemlist, Salesloft.
Integrations listed only by MailerCheck: MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, Make.
Integrations listed only by Prospeo: Salesforce, HubSpot, Pipedrive, Zoho, Close, monday.com, Smartlead, Instantly, Lemlist, Salesloft.
Use Case Recommendations
Best Fit for MailerCheck
- 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 Prospeo
- Budget-conscious teams looking for an affordable data enrichment tool
- Organizations with complex tech stacks needing broad integration support (10 integrations)
- Teams that want to start free and scale up as needs grow
Feature Comparison Summary
| Feature | MailerCheck | Prospeo |
|---|---|---|
| Starting Price | Free | Free |
| Top Tier Price | Usage-based | $249/mo |
| Total Features Listed | 8 | 8 |
| Integrations | 7 | 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
MailerCheck and Prospeo both serve the B2B lead data and contact enrichment market. MailerCheck offers a more accessible entry point, while Prospeo starts at $0/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 MailerCheck and Prospeo for current information.
Frequently asked questions.
Frequently asked questions- What is the core difference between MailerCheck and Prospeo?
- MailerCheck is an email list verification and deliverability testing tool that validates addresses and tests inbox placement before a send. Prospeo is a B2B lead search and data enrichment platform focused on finding verified work emails, direct mobile numbers, intent signals, and enriching CRM data. They solve related but different parts of the contact data problem.
- How much does MailerCheck cost?
- MailerCheck offers 10 free credits on a new account for email list verification only. After that, it runs on a pay as you go model starting at 1,000 credits for $0.01 per credit, where 1 credit equals 1 email verification.
- How much does Prospeo cost?
- Prospeo has a free plan with 100 credits per month, then three paid tiers: Starter at $49 per month with 2,000 credits per user per month, Growth at $99 per month with 5,000 credits per user per month, and Pro at $249 per month with 15,000 credits per user per month.
- Which tool has more integrations?
- Prospeo lists more integrations, connecting with 10 tools including Salesforce, HubSpot, Pipedrive, Zoho, Close, monday.com, Smartlead, Instantly, Lemlist, and Salesloft. MailerCheck lists 7 integrations, including MailerLite, Mailchimp, ActiveCampaign, GetResponse, ConvertKit, Zapier, and Make.
- Which tool is better for budget conscious teams?
- Both MailerCheck and Prospeo are recommended for budget conscious teams looking for an affordable data enrichment tool, since both let teams start free and scale up as needs grow. The right pick depends on whether your priority is email verification or broader lead search and CRM enrichment.
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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