mailfloss vs Mailgun Validations.
Both clean email lists. mailfloss is built for marketers who want set-and-forget cleanup inside their email platform. Mailgun Validations is built around a self-managed email validation API and bulk checker you run from your own code, usable with any email service provider. Here is how to choose.
Should you choose mailfloss or Mailgun Validations?
mailfloss and Mailgun Validations both verify email, but for different builders. Choose mailfloss if you want no-code, automated cleanup, typo fixing, and ongoing list hygiene running inside Mailchimp, Klaviyo, HubSpot, and 35+ platforms. Choose Mailgun Validations if you would rather run validation yourself — an API and bulk checker you operate from your own code, without connected ESP cleanup.
Pick the one built for how you actually work.
Pick mailfloss if…
- You’re on Mailchimp, Klaviyo, HubSpot, ActiveCampaign, or similar
- You want it to run automatically — not on every campaign manually
- You want typos fixed, not just deleted
- You want decay protection on your existing list
Pick Mailgun Validations if…
- You want to run validation yourself from your own code or one-off uploads, and do not need connected ESP cleanup
- You are comfortable managing verification results outside your email platform
- You only need checks when a file, form, or API call is submitted
- You do not need typo recovery and scheduled list decay protection in one workflow
Side by side.
A fair side-by-side of mailfloss and Mailgun Validations, focused on workflow fit instead of only raw verification checks.
Honest reasons to pick Mailgun Validations.
We are not the right tool for every job. If any of these sound like you, Mailgun Validations may be the better pick.
You want a self-managed validator
Mailgun Validate works with any email service provider as an API and bulk tool you run yourself — a fit when you want validation inside your own product or scripts.
You want to own the workflow end to end
Mailgun is a fit when your team wants to wire validation results into its own product logic and own every step of the process.
You do not need ESP cleanup
If you are validating product signups rather than cleaning Mailchimp, HubSpot, or Klaviyo contacts, Mailgun can be a good fit.
Where mailfloss beats Mailgun Validations - by design.
If you are a marketer using Mailchimp, Klaviyo, HubSpot, ActiveCampaign, or another supported email platform, this is where you will feel the difference.
Typo Fixer keeps subscribers other tools delete
When [email protected] arrives, Mailgun Validations marks it invalid. mailfloss fixes it to [email protected] and keeps the subscriber on your list. Across a year, that’s real revenue.
It runs on autopilot — not when you remember
Mailgun Validations cleans the list when you upload it. mailfloss connects to your email platform once and cleans daily, forever. Most marketers forget to run a verifier every month. mailfloss doesn’t.
Decay Protection catches addresses that rot
Subscribers from 3 years ago go bad on their own. mailfloss re-verifies your existing list on a schedule. Mailgun Validations makes you re-upload it.
No CSV gymnastics
With Mailgun Validations you export your list, upload, wait, download the results, re-import into your email platform. With mailfloss it’s all happening inside your email platform, automatically. Zero export/import.
Customer-friendly pricing
mailfloss has a money-back guarantee. Mailgun Validations doesn’t. If you don’t love it within 7 days, you don’t pay.
No-code for marketers — and a real API for developers
mailfloss is no-code: connect your email platform and it runs. But developers aren’t an afterthought — a modern v1 REST API (bearer-token auth, real-time and bulk verification, and webhooks) exposes the same engine to your code. Most verifiers hand you an API and leave the ongoing cleanup workflow for you to build; with mailfloss you get both.
“My integration is with HubSpot and I appreciate the custom properties for list segment and suppression control, the automated list cleaning, and the consistent release of new, valuable features like typo fix.”
For 25,000 monthly verifications:
Here’s what changes.
Most teams move over in an afternoon. No data export. No mapping spreadsheets.
Connect your email platform
One click into Mailchimp, Klaviyo, HubSpot, or ActiveCampaign. mailfloss reads your audience and starts the trial — nothing to import.
Turn on the features you used in Mailgun Validations
Bulk cleanup → Autofloss. Real-time check → Instafloss. Their list-review queue → our auto-actions panel. Most settings translate directly.
Cancel your Mailgun Validations subscription
When you’re happy, cancel Mailgun Validations. We won’t pressure you — if mailfloss doesn’t fit, our money-back guarantee covers you.