Coresignal vs mailfloss: Data Enrichment Tool Comparison
Compare Coresignal and mailfloss side by side. See pricing, features, and integrations to choose the right data enrichment tool for your needs.
Coresignal is a B2B web data provider offering company, employee, and job posting data through search and enrichment APIs, agentic search, and bulk datasets, starting free. mailfloss is an email verification service that cleans email lists daily on autopilot, starting at $29 per month. Choose based on whether you need contact data or list hygiene.
Key takeaways
- Coresignal offers a free entry tier while mailfloss's cheapest plan, Lite, starts at $29 per month.
- Coresignal provides nine pricing tiers ranging from a free plan to $5000 per month for 10,000,000 credits, compared to mailfloss's four tiers.
- Coresignal and mailfloss both list webhooks as a shared capability, and Zapier as a shared integration.
- mailfloss connects with email marketing platforms such as Mailchimp, Klaviyo, HubSpot, and ActiveCampaign, while Coresignal integrates with data infrastructure tools like Snowflake, Databricks, and Google Cloud.
- Coresignal's Free tier includes 2,000 credits and a 7 day free trial.
Reviewed and updated September 4, 2026
Coresignal vs mailfloss: Data Enrichment Tool Comparison
If you are comparing B2B lead data and contact enrichment tools, Coresignal 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, Coresignal lists multi-source endpoints and agentic search api, 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.
Coresignal 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
Coresignal is B2B web data provider serving company, employee and job posting records through search and enrichment APIs, a natural language agentic search API, and bulk datasets.
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.
Both platforms offer webhooks. Where they diverge is in their approach to pricing tiers and advanced capabilities.
Pricing Comparison
Free tier
Lite
Coresignal Pricing (as of September 2026)
| Plan | Price | Contacts |
|---|---|---|
| Free tier | Free | 2,000 credits, 7 day free trial |
| Mini | $49/mo | 2,500 credits per month |
| Starter | $199/mo | 12,000 credits per month |
| Pro | $499/mo | 35,000 credits per month |
| Growth | $1000/mo | 150,000 credits per month |
| Premium | $1500/mo | 1,000,000 credits per month |
| Scale | $3000/mo | 4,000,000 credits per month |
| Elite | $5000/mo | 10,000,000 credits per month |
| Datasets | Contact Sales | Companies, Employees and Job postings datasets, delivered as JSON or CSV |
Source: Coresignal 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
Coresignal 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.
Coresignal offers 9 pricing tiers compared to mailfloss's 4, giving you more granularity as you scale.
Coresignal includes a free tier, letting you test the platform before committing financially.
Features Breakdown
- Multi-source endpoints
- Agentic Search API
- Elasticsearch DSL
- Search preview
- Contact Enrichment API
- 3-month credit rollover
- and 1 more listed below
- Webhooks
- Cleans your list daily
- Removes addresses that decay over time
- Custom keep and remove rules
- Zapier integration
- Real-time API
- Automatically fixes typos
- and 3 more listed below
Coresignal Key Features
- Multi-source endpoints
- Agentic Search API
- Elasticsearch DSL
- Webhooks
- Search preview
- Contact Enrichment API
- 3-month credit rollover
- Dedicated account manager support
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
Shared Capabilities
Both Coresignal and mailfloss include:
- Webhooks
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 Coresignal
- Multi-source endpoints
- Agentic Search API
- Elasticsearch DSL
- Search preview
- Contact Enrichment API
- 3-month credit rollover
- Dedicated account manager support
Listed only by mailfloss
- Cleans your list daily
- Removes addresses that decay over time
- Custom keep and remove rules
- Zapier integration
- Real-time API
- Automatically fixes typos
- Prevents bounces in real-time
- Auto-tags subscribers after verification
- Single sign-on
Integration Ecosystem
Coresignal Integrations
Coresignal connects with: n8n, Zapier, Clay, Databricks, Google Cloud, Amazon S3, Snowflake, Azure.
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: Zapier.
Integrations listed only by Coresignal: n8n, Clay, Databricks, Google Cloud, Amazon S3, Snowflake, Azure.
Integrations listed only by mailfloss: 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.
Use Case Recommendations
Best Fit for Coresignal
- 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 | Coresignal | mailfloss |
|---|---|---|
| Starting Price | Free | $29/mo |
| Top Tier Price | Contact Sales | Usage-based |
| Total Features Listed | 8 | 10 |
| Integrations | 8 | 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
Coresignal and mailfloss both serve the B2B lead data and contact enrichment market. Coresignal 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 Coresignal and mailfloss for current information.
Frequently asked questions.
Frequently asked questions- What is the main difference between Coresignal and mailfloss?
- Coresignal is a B2B web data provider that delivers company, employee, and job posting data through search and enrichment APIs, while mailfloss is an email verification service that cleans email lists daily to remove bad addresses and prevent bounces. They serve different needs: contact data sourcing versus list hygiene.
- Which tool is cheaper, Coresignal or mailfloss?
- Coresignal has a lower entry price, offering a free tier with 2,000 credits and a 7 day trial, while mailfloss's cheapest plan, Lite, costs $29 per month for 10,000 credits. Coresignal also offers more pricing tiers, nine compared to mailfloss's four.
- Does Coresignal integrate with Zapier?
- Yes, Coresignal integrates with Zapier along with n8n, Clay, Databricks, Google Cloud, Amazon S3, Snowflake, and Azure. Zapier is also the one integration shared with mailfloss, which connects to email marketing platforms such as Mailchimp, Klaviyo, and HubSpot.
- What features does mailfloss offer that Coresignal doesn't list?
- mailfloss lists features including custom keep and remove rules, real-time API, automatic typo fixing, real-time bounce prevention, auto-tagging subscribers after verification, and single sign-on. These are listed only by mailfloss and not on Coresignal's feature list.
- What is Coresignal's most expensive plan?
- Coresignal's most expensive listed plan is Elite at $5000 per month, which includes 10,000,000 credits per month. Coresignal also offers a separate Datasets option priced through custom sales quotes for companies, employees, and job postings data delivered as JSON or CSV.
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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