Mailfloss review (2026): is the free plan enough?
Email list cleaning that runs inside your email platform
Black Friday: is there a Mailfloss sale?
Mailfloss report card
Fair · out of 4.0 · graded Nov 13, 2026
Best for cleaning an email list inside your email platform
mailfloss checks and cleans the list in your email platform, with a typo fixer and signup checks. The free plan is 500 verifications a month, subscriptions need a supported email platform, and the trial wants a card.
Who Mailfloss is for
- Fits if your list lives in Mailchimp, Klaviyo or another platform it plugs into
- Works for lists that need cleaning every day without uploads
Who Mailfloss is not for
- Tight if you stay free, as 500 verifications a month runs out fast
- Not for you if your platform isn't supported, because you'd use prepaid credits instead
- Watch out: the 7-day trial needs a credit card and the plan starts on day 8
- Pricey if you want more platforms, as Lite connects one and Business ten
Why Mailfloss gets a 2.2
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- CValue for money$29 a month for 10,000 credits, between the email-checker category's middle of $23 and its dearer quarter of $49.
- CFree plan and trial500 verifications a month, renewing, which is a cap a real list passes. The 7-day trial needs a card.
- CFeaturesTypo fixer, signup checks, daily cleaning and decay protection. But subscription plans need a supported email platform.
- CEase of useNo store rating on record. You connect your email platform before it works.
- BPlatforms and integrationsWeb with Mailchimp, Klaviyo, HubSpot, ActiveCampaign, Kit, Brevo and Zapier links, plus an API.
What these grades rest on. Graded from this listing, whose facts were read from mailfloss's own pages on 13 November 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/mailfloss#review"><img src="https://toolgpa.com/badge/mailfloss.svg" alt="Mailfloss: 2.2 GPA on ToolGPA" width="196" height="56"></a>Where Mailfloss stands among email verification and deliverability tools
Mailfloss's GPA of 2.2 is higher than 23 of the 61 other email verification and deliverability tools we grade, and level with 13.
It stands best on platforms and integrations (B, above 28 of 61) and worst on features (C, above 0).
Its paid plans start at $29 a month, against a middle price of $21.50 for the category: 27 of the 43 others that charge start lower.
On features, ease of use and platforms it scores 2.3 out of 4. 7 tools score higher and cost less.
Each grade against the category
Every bar is all 62 email verification and deliverability tools we grade, cut by the letter each got. Mailfloss’s own letter is outlined.
- CValue for moneyAbove 9 of 61, level with 35
- CFree plan and trialAbove 9 of 61, level with 43
- CFeaturesAbove 0 of 61, level with 45
- CEase of useAbove 2 of 61, level with 50
- BPlatforms and integrationsAbove 28 of 61, level with 33
Price against what you get
Each dot is one of 45 email verification and deliverability tools. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Mailfloss, or make your own?
Keep it
To replace Mailfloss you would be making newsletters sent to thousands of people that still reach the inbox. That is not a weekend's work, with an AI app builder or without one.
It costs $348 a year.
What you could not
- Newsletters sent to thousands of people that still reach the inbox.
- Connections to other products, each kept working as those products change.
- Checking that an address exists without writing to it.
- What a company asks for before it lets staff use something: roles and permissions.
What this rests on. Mailfloss’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Mailfloss?
Mailfloss is an email verification service that connects to an email marketing platform and checks addresses on a schedule and at signup. It removes or tags bad addresses and fixes common typos in place. Prepaid credits cover one-off CSV uploads, and a REST API is also offered.
Worth knowing
- Subscription plans need a supported email platform; others must use prepaid credits.
- A credit card is required for the 7-day trial, and the plan starts on day 8.
- Prices on the page are read as monthly; the page offers an annual option that saves 17%.
- Only the entry credit step of each plan shows a price in the page text read here.
Key features
- Typo Fixer
- Recognizes more than 250 typo patterns in email domains and corrects the address in place instead of deleting the subscriber.
- Signup verification
- Instafloss checks each new signup as it arrives and screens out fake, disposable, role-based and dead addresses.
- Daily list cleaning
- Autofloss scans new subscribers every day and removes those that fail validation, with custom keep and remove rules.
- Decay protection
- Re-checks older subscribers on a schedule, since addresses on a list go bad over time.
- Prepaid credits
- For lists outside a supported platform, credits are bought once, never expire, and are used by uploading a file.
- API and Zapier
- Every subscription plan lists a real-time API, webhooks and a Zapier integration.
Mailfloss pricing
As of Nov 13, 2026, Mailfloss has a free plan, and paid plans start at $29 per month for 10,000 credits, billed monthly.
- Starts at
- $29 per month for 10,000 credits, billed monthly
- Free plan
- 500 verifications a month, renewing every month.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Lite | $29per month for 10,000 credits, billed monthly | Connects 1 email platform. Credits step up to 510,000 a month at a higher price; higher steps are not priced on the page. |
| Business | $59per month for 25,000 credits, billed monthly | Connects 10 email platforms. Credit steps run up to 525,000 a month at higher prices. |
| Pro | $209per month for 125,000 credits, billed monthly | Unlimited email platforms, priority human support and single sign-on. Credit steps run up to 625,000 a month. |
Read from mailfloss.com on Nov 13, 2026. Prices change, so confirm with Mailfloss before you buy.
Ways to pay less
- Annual discountSave 17% with annual billing
The pricing page has a Monthly/Annual toggle labeled Save 17%. The annual prices were not readable in the page text.
Stated on mailfloss.com
Works with
Mailfloss alternatives
- Mailfloss vs Bouncer
Free trial · from $8 one-time
- Mailfloss vs ZeroBounce
Free plan · from $39 one-time
- Mailfloss vs NeverBounce
Free trial · from $8 one-time
- Mailfloss vs Emailable
Free trial · from $38 one-time
- Mailfloss vs MillionVerifier
Free trial · from $39 one-time
Common questions
Does Mailfloss have an Android app?
No Android app was listed when its pages were read on Nov 13, 2026. Mailfloss is listed for Web.
Does Mailfloss have an iPhone app?
No iPhone app was listed when its pages were read on Nov 13, 2026. Mailfloss is listed for Web.
Is Mailfloss open source?
Mailfloss is not described as open source on its own site, as read on Nov 13, 2026.
Does Mailfloss have an API?
Yes. Mailfloss offers a public API, according to its own site.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Nov 13, 2026.