Mailboxlayer alternative
Mailboxlayer costs $14.99 a month for 5,000 verifications, or $161.99 for a year, metered as monthly api request quota. SimpleVerifier is $29.99 a month with no cap on verifications, the email finder or enrichment. Both run real SMTP mailbox checks. Keep Mailboxlayer if you only need a validation call inside your own code and are comfortable building the upload, de-duplication and export around it.
Prices read from mailboxlayer.com · last checked 2026-10-12
| Mailboxlayer | SimpleVerifier | |
|---|---|---|
| Cheapest route | $14.99/mo | $29.99/mo |
| Per year | $161.99 | $359.88 |
| Verification limit | Monthly API request quota | Unlimited |
| Real SMTP mailbox check | ||
| Re-verifying a list costs again | cached 14 days | |
| Email finder included | Varies by plan | Yes, unlimited |
What it actually costs, by list size
One pass over a list, on Mailboxlayer’s cheapest available route versus one month of SimpleVerifier. Where Mailboxlayer sells both a subscription and pay-as-you-go, the cheaper of the two is used.
| List size | Mailboxlayer | SimpleVerifier | Cheaper |
|---|---|---|---|
| 1,000 | $14.99One month of the 5,000/mo plan | $29.99 | Mailboxlayer |
| 10,000 | $29.982 months of a 5,000/mo allowance | $29.99 | Mailboxlayer |
| 50,000 | $74.99One month of the 50,000/mo plan | $29.99 | SimpleVerifier |
| 100,000 | $149.982 months of a 50,000/mo allowance | $29.99 | SimpleVerifier |
One pass only. Every figure in the Mailboxlayer column recurs each time you re-verify; the SimpleVerifier column does not, because confirmed results are cached for 14 days and volume does not change the price. Adjust for your own pattern in the cost calculator.
Where Mailboxlayer’s pricing bites
Mailboxlayer charges $14.99 a month for 5,000 verifications, or $161.99 for a year, and it is an API quota, not a list tool, so cleaning a CSV means writing the batching yourself and every row counts against the month. That is not a criticism of the product — it is how per-address pricing works, and it is fine when your volume is small and steady. It stops being fine the month you acquire a list, inherit a CRM export, or want to re-check something you verified in the spring.
The reason we can price flat is narrow and worth stating plainly: a mailbox check is a DNS lookup plus a short SMTP conversation, and it costs us nothing per address. Metering it would be a pricing choice, not a cost recovery. The one feature with a genuine per-record cost — lead sourcing — does carry a published fair-use limit of 10,000 a month.
Who should stay with Mailboxlayer
Keep Mailboxlayer if you only need a validation call inside your own code and are comfortable building the upload, de-duplication and export around it. A dedicated verifier replaces one part of that, not the whole thing, and switching to shave a few dollars a month while losing a workflow you depend on is a bad trade.
Test both before you decide
Do not take either vendor’s word on accuracy. Invent an address at a real domain and verify it on both. A tool doing real mailbox checks returns invalid; one checking only syntax and MX returns valid. Run the same test on any tool you are considering, ours included.
Common questions
- How much does Mailboxlayer cost?
- Mailboxlayer costs $14.99 a month for 5,000 verifications, or $161.99 for a year, metered as: monthly api request quota. Prices read from mailboxlayer.com on 2026-10-12.
- Is there a cheaper alternative to Mailboxlayer?
- SimpleVerifier is $29.99 a month with no limit on verifications, against $14.99 a month for 5,000 verifications, or $161.99 for a year for Mailboxlayer. Which is actually cheaper depends on your volume and how often you re-verify — it is an API quota, not a list tool, so cleaning a CSV means writing the batching yourself and every row counts against the month. Keep Mailboxlayer if you only need a validation call inside your own code and are comfortable building the upload, de-duplication and export around it.
- Should I switch from Mailboxlayer?
- Keep Mailboxlayer if you only need a validation call inside your own code and are comfortable building the upload, de-duplication and export around it. Switch if your verification volume is spiky or large and you would rather pay one flat price than manage an allowance.
- Does SimpleVerifier do real SMTP mailbox checks like Mailboxlayer?
- Yes. Every address gets a syntax check, an MX lookup and an SMTP conversation with the recipient's mail server to confirm the specific mailbox. Anything the probe cannot confirm is returned as risky rather than valid, and 8,740 disposable domains are blocked outright.
Try it against your own list
$29.99 a month, unlimited verifications and API access, cancel anytime.