Abstract API alternative
Abstract API costs $17 a month, metered as monthly request allowance. SimpleVerifier is $29.99 a month with no cap on verifications, the email finder or enrichment. Both run real SMTP mailbox checks. Keep Abstract API if you already use Abstract's other APIs, such as IP geolocation or phone validation, and want one key and one bill.
Prices read from abstractapi.com · last checked 2026-10-12
| Abstract API | SimpleVerifier | |
|---|---|---|
| Cheapest route | $17/mo | $29.99/mo |
| Per year | $204 | $359.88 |
| Verification limit | Monthly request allowance | 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 Abstract API’s cheapest available route versus one month of SimpleVerifier. Where Abstract API sells both a subscription and pay-as-you-go, the cheaper of the two is used.
| List size | Abstract API | SimpleVerifier | Cheaper |
|---|---|---|---|
| 1,000 | Not publishedAllowance not published | $29.99 | Unknown |
| 10,000 | Not publishedAllowance not published | $29.99 | Unknown |
| 50,000 | Not publishedAllowance not published | $29.99 | Unknown |
| 100,000 | Not publishedAllowance not published | $29.99 | Unknown |
One pass only. Every figure in the Abstract API 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 Abstract API’s pricing bites
Abstract API charges $17 a month, and the plan is a request quota, so a bulk clean and your live sign-up checks compete for the same allowance. 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 Abstract API
Keep Abstract API if you already use Abstract's other APIs, such as IP geolocation or phone validation, and want one key and one bill. 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 Abstract API cost?
- Abstract API costs $17 a month, metered as: monthly request allowance. Prices read from abstractapi.com on 2026-10-12.
- Is there a cheaper alternative to Abstract API?
- SimpleVerifier is $29.99 a month with no limit on verifications, against $17 a month for Abstract API. Which is actually cheaper depends on your volume and how often you re-verify — the plan is a request quota, so a bulk clean and your live sign-up checks compete for the same allowance. Keep Abstract API if you already use Abstract's other APIs, such as IP geolocation or phone validation, and want one key and one bill.
- Should I switch from Abstract API?
- Keep Abstract API if you already use Abstract's other APIs, such as IP geolocation or phone validation, and want one key and one bill. 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 Abstract API?
- 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.