Is Bouncer Accurate? What Its Guarantee Covers and How to Test It

How an email verifier can be "accurate"

Nobody has an answer key for your list. A verifier can't log into a mailbox; it asks the server that hosts it, and the server can answer four ways: the mailbox exists, it doesn't, every address is accepted (catch-all), or no answer. The first two are where every competent tool agrees. The last two are where tools differ, and where accuracy claims stop being comparable.

So "is Bouncer accurate?" really means two things:

1. Does it get the clear cases right? (It runs real SMTP checks, so it should.)
2. How does it label the unclear ones, and does it charge you for them?

What Bouncer promises, read closely

The guarantee

The guarantee page says, in short:

• If Bouncer marks an address deliverable and it bounces within 72 hours of verification, you get your money back for those bounced contacts.
• The bounce has to have an objective reason. The FAQ excludes spam rejections and soft bounces.

That is a meaningful promise for the deliverable label, and it's more specific than most. Note what it leaves out:

• No risky, accept-all or unknown rows are described as covered. Those are the rows most likely to bounce.
• 72 hours is short. If you verify on Monday and your sequence sends on Friday, a bounce falls outside it.
• The page doesn't describe a claim process. Keep your bounce logs, with the full SMTP replies, if you intend to claim.

The page also quotes an accuracy figure. Like every vendor figure we've seen, it comes from the vendor; we know of no independent audit, and we publish no accuracy percentage of our own.

Billing

Bouncer's pricing page says it won't charge for duplicates within a list or for unknown results, and that credits never expire on packs or on subscriptions. Both are fair terms. Bouncer's terms, which we read for is Bouncer legit, say purchases are non-refundable, so the guarantee is the route for bad results, not a general refund.

The rows to watch: accept-all and unknown

Accept-all (catch-all). The domain accepts mail for every address. A check returns the same yes for a real person and a made-up name. No tool can confirm these by asking the server, so whatever label they get, treat them as unconfirmed. On B2B cold lists they are often a large share. Send them separately, in a smaller batch, with a stop rule. See what to do with catch-all emails.

Unknown. The server didn't answer in time, greylisted the check or blocked it. Bouncer doesn't charge for these. Re-run them later; many resolve.

Risky. Role addresses (info@, sales@), disposable domains and full mailboxes. Whether to send depends on the campaign; for cold email, usually not.

What it costs to test

From the pricing page, 6 November 2026:

Credits	Price	Per 1,000
1,000	$8	$8.00
5,000	$35	$7.00
10,000	$60	$6.00
50,000	$250	$5.00
100,000	$400	$4.00
250,000	$750	$3.00
500,000	$1,250	$2.50
1,000,000	$2,000	$2.00

New accounts start with 100 free credits, no card. A monthly subscription option exists; its prices weren't printed in the page text we read. Above 1,000,000, Bouncer asks you to contact sales. Compare it with other vendors in the email verification pricing index.

A 30-minute accuracy test on your own list

1. Take 500 random rows from the list you'll actually send, with the email list sampler.
2. Run them through Bouncer (the 100 free credits plus the 1,000 pack for $8 covers it) and through a second verifier.
3. Compare the two result files in the verifier comparison tool. Note how many rows each puts in deliverable versus accept-all or risky.
4. Send to the rows both tools call deliverable, within 72 hours of verification so the guarantee window applies, from a warmed inbox.
5. Count hard bounces with the bounce rate calculator. Under 2% is the usual safe line for cold email.
6. Send 50 accept-all rows separately if you plan to use them, and count again.

The two bounce numbers from steps 5 and 6 are the only accuracy figures that matter for your list.

When Bouncer is a good fit

• You want pay-as-you-go credits that never expire, without a subscription.
• You value a written guarantee on the deliverable label.
• You clean lists occasionally and can send within 72 hours of verifying.

Where SimpleVerifier fits

SimpleVerifier handles the unclear rows explicitly: catch-all addresses are always risky, never valid, and graded higher, medium or lower likelihood with the reason (how grading works), so you can send the best of them first. Every other row gets a live SMTP mailbox check, and unknowns say why the server didn't answer.

It is priced for people who verify every month:

• Pro, $39 a month: Unlimited email verification.*
• Starter, $9 a month: 2,500 emails a month.
• Free: 100 checks with a Google sign-in.

*Fair use: the first 100,000 checks a month at full speed, then slower, never cut off.

At Bouncer's list prices, 100,000 checks cost $400 each time. If you re-check that volume monthly, a flat plan costs less. Pro also adds phone format checks, an email finder, an API, an MCP server and integrations with Instantly, Smartlead and HubSpot. See pricing, or run your 500-row sample on the verify page.

More reading: Bouncer alternatives, Hunter vs Bouncer, email verifier bounce guarantees.