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Mailfloss review

Set-it-once email verification that fixes typos and clears dead addresses on autopilot.

Mailfloss costs from $29/mo · 4 plans · Free plan available · prices checked Oct 13, 2026

By Ciroapp Editorial Team · Updated Sep 9, 2026

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Pricing verified Oct 13, 2026

Ciroapp score

4.1/ 5

Mailfloss connects to 40+ email platforms and cleans your list continuously, fixing typos and blocking fake signups without exports or spreadsheets. Pricing is transparent, but the entry plan skips webhooks and real-time protection, and independent reviews are scarce. Overall, it's a low-risk, recommendable pick for marketers on supported platforms.

Pros

Pros:Typo Fixer repairs addresses in place — it recognizes 250+ common typo patterns like gmial.com and hotmial.com, keeping roughly 1 in 32 subscribers that competing verifiers would delete as invalid
Pros:Instafloss validates every new signup in real time with a single dashboard toggle and zero code, blocking bots, fakes, disposable addresses, and role accounts (about 14% of signups on a typical newsletter)
Pros:Hygiene runs on autopilot — Autofloss sweeps each day's new subscribers daily, while decay protection re-validates your entire list on a cadence you set, from weekly to every six months — no CSV exports or re-imports

Cons

Cons:Subscription pricing starts at $29/month for 10,000 verifications, which can exceed the needs of very small or infrequent senders despite the free 500-verification tier
Cons:Typo Fixer, webhooks, and real-time bounce prevention only start on the Business tier at $59/month — the entry-level Lite plan omits them, so judge on features rather than price alone
Cons:Lite connects just one email platform, so teams sending from multiple services must move up to Business (10 platforms) or Pro (unlimited)

Best for

Email marketers on Mailchimp, Klaviyo, HubSpot, or ActiveCampaign who want hands-off list hygiene
Teams tired of monthly CSV exports, typo hunting, and re-imports
Businesses buying leads through ads, lead magnets, or giveaways where typos and bots inflate costs

Free trial: Yes — 7 days
Money-back guarantee: Yes

What is Mailfloss?

Every bad email address bills you twice — once to acquire it, and again when your platform charges per contact. Worse, bounces and spam traps drag your whole list toward spam. mailfloss connects to your email platform and fixes typos, blocks fake signups, and removes dead addresses automatically, so list cleaning stops eating your time and budget.

mailfloss is an email verification service built for marketers. Instead of exporting lists, running checks, and re-importing results, you connect it once to your platform — Mailchimp, Klaviyo, HubSpot, ActiveCampaign, or 40+ others — and it cleans continuously in the background. It fixes typos, removes dead and disposable addresses, validates new signups in real time, and re-checks older subscribers on a schedule.

CSV uploads and a REST API cover everyone else.

Should you choose Mailfloss?

Quick buyer guidance before you compare plans or click through.

Choose it if

You run recurring campaigns and can't afford bounces or spam-trap hits
You want continuous cleaning rather than periodic manual audits
You'd rather fix typo'd signups than lose real subscribers
Your email platform is among the 40+ one-click integrations
You prefer trying before buying — there's a 7-day free trial and a money-back guarantee

Skip it if

Teams on platforms outside the 40+ supported integrations — you'll rely on CSV uploads, Zapier, the JS form widget, or the API instead, which adds setup work
Very small or infrequent senders — pricing starts at $29/month for 10,000 verifications, which may exceed your needs
Anyone needing real-time form validation without a platform connection or site code access — without Instafloss or the JS widget, daily Autofloss catches issues up to 24 hours late
Buyers who want full plan tiers and guarantee details upfront — the homepage shows a starting price and a money-back guarantee, but you should confirm exact terms before purchase

Next steps before buying

1Confirm your email platform is on the supported list — one-click connections cover 40+ platforms including Mailchimp, Klaviyo, HubSpot, and ActiveCampaign
2Decide which mode you need: real-time signup checks (Instafloss or the JS form widget), daily cleanup, or periodic full-list sweeps
3Match pricing to your list size — plans start at $29/month for 10,000 verifications, and CSV uploads can be paid per credit without a subscription
4Compare against other verifiers if typo-fixing matters most, since that's mailfloss's stated edge over tools that simply delete bad addresses
5Use the 7-day free trial and read the money-back guarantee terms before committing to a paid plan

Ease of use

Setup looks genuinely simple based on the site's own onboarding signals: one-click connections to 40+ platforms, a single dashboard toggle for real-time checks, and zero code required. Customer testimonials on the page repeatedly mention quick installation and the tool running quietly with no maintenance. The only real decision is picking a decay-sweep cadence, and the monthly default works out of the box.

Mailfloss Key Features

🔧 Typo Fixer: keeps subscribers other tools delete

Most tools see [email protected] and delete the subscriber. Typo Fixer recognizes the pattern, fixes the domain, and keeps them. It knows 250+ common mistakes across major domains, so roughly 1 in 32 subscribers other services lose stay on your list.

It layers on top of every other cleanup mode, automatically.

✨ Instafloss stops junk signups at the door

Flip one toggle in your dashboard — zero code — and every new signup gets verified the moment it lands. Instafloss blocks bot and spam signups, fakes, disposable addresses, role accounts, and dead domains before they ever reach your list. On a typical newsletter, that's about 14% of signups stopped before they hurt you.

✨ Autopilot cleanup that never sleeps

Autofloss validates each day's new subscribers every morning — no JavaScript on your forms needed. Then decay protection re-checks your entire list on a cadence you set. Sweep anywhere from weekly to every six months; monthly is the default.

Abandoned inboxes and expired domains get quietly removed before they drag down delivery for everyone.

✨ Verification beyond the big platforms

mailfloss shines connected to your email platform, but that's not the only way in:

CSV uploads and copy-paste clean one-off lists, paid per credit, no subscription
Zapier, webhooks, and a JS form widget plug checks into any workflow
Google Sheets, Airtable, and a REST API verify addresses in place or by code

It's the same engine behind every option.

✨ Set it once, tune it if you want

Setup is a one-click connection to any of 40+ platforms, including Mailchimp, Klaviyo, HubSpot, and ActiveCampaign. From there, mailfloss runs on autopilot. You can shape how it behaves with custom keep and remove rules, and subscribers get auto-tagged so you always know what changed.

No exports, no re-imports, no maintenance.

Use Cases

📬 Send campaigns without cleaning lists again

You email subscribers every week from Mailchimp or Klaviyo. Connect once, and mailfloss fixes typos, clears bounces, and re-checks old contacts on autopilot. Expected outcome: cleaner sends and no more monthly CSV exports.

🎯 Stop burning ad spend on fake signups

You collect leads through ads, lead magnets, or giveaways. Instafloss checks each signup in real time and blocks bots, fakes, and disposables before they land on your list. Expected outcome: you stop paying to store junk.

🛒 Run several email platforms under one roof

Your team sends from Klaviyo and Mailchimp side by side. The Business plan covers up to 10 platform connections, with real-time bounce prevention while you send. > Tip: check the plan table — Typo Fixer starts at this tier.

🧰 Clean one-off lists or build it yourself

Got a stale CSV or a custom product? Upload files, paste addresses, or call the REST API — pay per credit, no subscription. Zapier and webhooks drop verification into any workflow.

Expected outcome: clean data wherever you work.

Mailfloss pricing

From$29/mo

4 plans
Free plan available

Prices checked on Oct 13, 2026 from Mailfloss's pricing page

View pricing page screenshot

Plan	Billed monthly	Billed annually	Includes
Free	Free	—	500 verifications a month, every month, free forever
Lite	$29/mo	—	Best for Small Businesses; 10,000 credits/month base with upgrade tiers to 20k, 60k, 110k, 260k, or 510k credits/month; connects 1 email platform; 7-day free trial
Business	$59/mo	—	Best value, for Ecomm Email Marketers; 25,000 credits/month base with upgrade tiers to 35k, 75k, 125k, 275k, or 525k credits/month; connects 10 email platforms; 7-day free trial
Pro	$209/mo	—	Best for High-Growth Teams; 125,000 credits/month base with upgrade tiers to 135k, 175k, 225k, 375k, or 625k credits/month; unlimited email platforms; 7-day free trial

Price history

Tracking prices since Sep 8, 2026. No price change detected yet.

Pricing types: Free trial, Monthly subscription, One-time payment, Usage-based pricing

Pricing notes

Mailfloss offers three subscription plans: Lite at $29/month for 10,000 credits, Business at $59/month for 25,000 credits, and Pro at $209/month for 125,000 credits, with annual billing saving 17%. All plans include a 7-day free trial, and a free option provides 500 verifications per month forever.

Mailfloss costs between $29 and $209 per month with three subscription plans: Lite at $29/month, Business at $59/month, and Pro at $209/month. Every plan includes a free 7-day trial.

Here's how each one breaks down.

Lite

Price: $29/month Websites Supported: 1 email platform Best For: Small Businesses Refund Policy: Money-back guarantee Other Features:

10,000 credits per month (1 credit = 1 verified address)
Cleans your list daily and removes decayed addresses
Custom keep & remove rules
Zapier integration and real-time API
Automatically fixes typos and auto-tags subscribers

Lite is the simple starting point. It plugs into one email platform and keeps your list clean every day, so you never touch a spreadsheet. Small businesses running a single newsletter or store will find everything they need here.

Business

Price: $59/month Websites Supported: 10 email platforms Best For: Ecomm Email Marketers Refund Policy: Money-back guarantee Other Features:

25,000 credits per month
Flagged as 'Best value' on the pricing page
Webhooks and real-time bounce prevention
Custom keep & remove rules
Single sign-on

Business is the sweet spot for ecommerce teams 💡. You get ten platform connections, so brands running Mailchimp and Klaviyo side by side are covered. Per the site's FAQ, Typo Fixer, webhooks, and real-time bounce prevention start on this tier, so check the plan table before you judge on price alone.

Pro

Price: $209/month Websites Supported: Unlimited email platforms Best For: High-Growth Teams Refund Policy: Money-back guarantee Other Features:

125,000 credits per month
Priority human support
Single sign-on
Webhooks and real-time API
Full autopilot cleanup suite

Pro is built for high-growth teams with big, fast-moving lists. You get 125,000 credits a month and priority support when you need a fast answer. Companies juggling many email platforms or tighter security requirements will want this tier. Smaller operations should stick with Lite or Business and keep the difference.

Every subscription plan starts with a free 7-day trial, so you can clean your list before paying a cent. Mailfloss also backs its plans with a money-back guarantee. If your email platform isn't supported, prepaid credits handle one-time bulk checks with no subscription, and they never expire.

Cost calculator

Estimate what Mailfloss costs for your team.

PlanSeats (users)

Billing

MonthlyAnnual

Per month: $29
Per year: $348

Lite states no user limit: shown as one price for the whole account. Check the price for 5 users with the vendor. Estimate based on published list prices, before taxes, add-ons and discounts.

How to pay less for Mailfloss

Start on the free plan and upgrade only when you hit its limits.
Use the 7-day free trial before you pay.

Start free trial

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Why use Mailfloss?

Email lists rot quietly. Research cited on the site puts decay at roughly 2–3% of addresses per month, and each bad one bills you three ways: wasted acquisition spend, higher platform fees, and a weaker sender reputation. mailfloss automates the cleanup so it never piles up.

Typos get fixed, not deleted. The Typo Fixer recognizes 250+ common patterns (gmial.com, hotmial.com) and repairs addresses in place. Per the company, that saves about 1 in 32 subscribers other tools would drop.
Junk never reaches your list. Instafloss validates each new signup in real time, blocking bots, fakes, disposables, and role accounts — around 14% of signups on a typical newsletter, according to the site.
Cleanup runs without you. Autofloss scans each day's new subscribers, while decay protection re-validates your full list on a cadence you set, from weekly to every six months.
Deliverability improves for everyone. The site's worked example shows a 10,000-contact send lifting inbox reach from 76% to 96% after cleaning.
It works beyond integrations. CSV uploads, copy-paste, Google Sheets, Airtable, Zapier, webhooks, and a REST API cover one-off lists, no-code workflows, and custom builds.
The risk is low. A free 7-day trial, a money-back guarantee, and plans from $29/month make it easy to test on your own list.

Try it now View pricing

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Mailfloss FAQ

How much does Mailfloss cost?

Mailfloss's cheapest paid plan, Lite, costs $29 per month. Paid plans range from $29 to $209 per month. Prices checked on Oct 13, 2026 from the vendor's pricing page.

Does Mailfloss have a free plan?

Yes. Mailfloss has a free plan (Free); paid plans start at $29 per month.

Does Mailfloss offer a free trial or a money-back guarantee?

Mailfloss offers a 7-day free trial.

Has Mailfloss's price changed recently?

No. We have not detected a price change since we started tracking on Sep 8, 2026.

What happens if my email platform isn't supported?

You can still verify without a native integration. Options include CSV uploads, copy-paste, Google Sheets, Airtable, Zapier, webhooks, a JavaScript form widget, and the REST API. Prepaid credits cover one-off checks with no subscription.

What kind of support can I expect on each plan?

All plans include human support, and Pro adds priority handling when you need a fast answer. If your team relies on quick responses during big launches, that's a reason to consider the $209 tier.