Bouncer vs Mailfloss (2026): which should you pick?

Pick Bouncer if

• Fits if you clean a list a few times a year and don't want a subscription
• Works for companies that want their data processed and hosted in the EU

Look elsewhere if

• Skip it if you need a new inbox warmed up or DMARC managed, as Bouncer does neither
• Pricey if you also want placement and blocklist tests, as the Deliverability Kit is sold apart from $25 a month
• Watch out: Bouncer Shield for sign-up forms is another monthly subscription, priced by the number of checks
• Tight if you want to test first, as the 100 free credits cover a sample, not a whole list
• Watch out: the monthly credit subscription shows its price only inside the calculator

Pick Mailfloss if

• Fits if your list lives in Mailchimp, Klaviyo or another platform it plugs into
• Works for lists that need cleaning every day without uploads

Look elsewhere if

• 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

Bouncer

• Credits can also be bought as a monthly subscription that refills each month; the page shows its price only inside the calculator.
• Bouncer Shield, for form checks, is a separate monthly subscription priced by the number of checks.
• The Deliverability Kit is sold separately from verification credits.
• Bouncer does not warm up inboxes or manage DMARC records; the kit only tests them.

Mailfloss

• 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.

Bouncer

List verification

Upload a CSV and get each address back as deliverable, risky, undeliverable or unknown, with reasons. Catch-all domains get a deeper check.

Verification API

Synchronous and batch endpoints verify addresses from your own app, and an MCP server connects Bouncer to ChatGPT, Claude and other AI tools.

Toxicity Check

Scores each address from 0 to 5 for risks such as breached or widely shared addresses, known complainers and likely spam traps.

Bouncer Shield

Checks addresses as they are typed into sign-up forms and can block invalid, malicious or fraudulent entries by address or IP.

Deliverability Kit

Sends test emails to see whether they land in the inbox or spam, checks SPF, DKIM and DMARC, and monitors IPs and domains on blocklists.

AutoClean and integrations

Connects to email and CRM tools such as Mailchimp, HubSpot and Klaviyo to verify lists where they live, and AutoClean verifies a connected CRM without manual uploads.

Mailfloss

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.

Bouncer

• Pay as you go$8

  one-time for 1,000 credits

  Credits never expire and get cheaper in bulk: $60 for 10,000, $400 for 100,000 and $2,000 for 1 million. Duplicates and unknown results are not charged.

• Deliverability Kit Starter$25

  per month for 250 test emails

  Inbox placement, blocklist, SPF, DKIM, DMARC and SpamAssassin tests, with 10 IPs or domains monitored. Sold apart from verification.

• Deliverability Kit Standard$125

  per month for 1,000 test emails

  The same tests with 25 IPs or domains monitored.

• Deliverability Kit Pro$250

  per month for 2,500 test emails

  The same tests with 50 IPs or domains monitored.

• EnterpriseCustom

  Unlimited test emails and monitored IPs or domains, multi-organization setup, custom agreements and an account manager.

Mailfloss

• Lite$29

  per 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$59

  per month for 25,000 credits, billed monthly

  Connects 10 email platforms. Credit steps run up to 525,000 a month at higher prices.

• Pro$209

  per 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.

Bouncer

No public discounts listed.

Mailfloss

• Annual discount

  Save 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.