Email validation API
Fiber AI, free, 7-day free trial
$0.00per 1,000 emails
Plan: 7-day free trial one of Fiber AI's 10 plans
- Free, Cardless API trialCardless API trial$0.00 per 1,000
- Free, 7-day free trial7-day free trial$0.00 per 1,000
- $3 packPay-as-you-go$30.00 per 1,000
- $300 monthlyProspector$20.00 per 1,000
- $900 monthlyGrowth$18.00 per 1,000
- $2,400 monthlyEnterprise$16.00 per 1,000
- $3,000 yearlyProspector$16.667 per 1,000
- $9,000 yearlyGrowth$15.00 per 1,000
- $24,000 yearlyEnterprise$13.333 per 1,000
- Contact usEnterprise & bulk data
Call:
POST / Fiber AI's only callAbout this item
- Live. The call checks the email when you make it.
- Nothing to pay. You get 500 credits, enough for 500 calls, once. Unused credits expire: when a canceled trial's period ends, credits zero out.
- One call. You send email to
POST /. The call returns whether the address takes mail.v1/ validate-email/ single - Who can get it: anyone with a payment method on file, to use only in the United States. Keep data: with conditions. Use data: with conditions.
Compare with similar plans
Other providers' plans with the closest prices per 1,000. Like this plan, each is live.
| This planFiber AI, free, 7-day free trial | Airscale, free | Anymail Finder, free | BetterEnrich, free, 100 credits free, POST /api/v1/verify-catch-all-email | Bouncer, free, 100 free credits, POST /v1.1/email/verify/batch | |
|---|---|---|---|---|---|
| $ per 1,000 | $0.00 | $0.00 | $0.00 | $0.00 | $0.00 |
| Billing | free | free | free | free | free |
| Pay | $0 | $0 | $0 | $0 | $0 |
| Enough for | 500 calls, once | not published | 500 calls, once | 500 calls, once | 100 results, once |
| Freshness | live | live | live | live | live |
| Who can get it | anyone with a payment method on file, to use only in the United States | anyone 18 or over | businesses only, once per person, on picking a monthly plan with a card checked but not charged, subject to fraud checks | anyone, for lawful business purposes only | anyone 18 or over with a work email, a private one (Gmail, Hotmail) only after writing to Bouncer first |
Sources
From each provider's own pricing page and docs. We read this row from these pages on 2026-10-17.
- api.fiber.ai/ai-docs/emailBounceDetection.md
- api.fiber.ai/llms-full.txt
- docs.fiber.ai/account
- docs.fiber.ai/account/quickstart
- docs.fiber.ai/billing
- docs.fiber.ai/billing/pricing
- docs.fiber.ai/build/rate-limits
- docs.fiber.ai/enrichment/email-validation
- docs.fiber.ai/linkedin/live-fetch
- fiber.ai/llms.txt
- fiber.ai/pricing
- fiber.ai/pricing.md
- fiber.ai/terms
Product details
We list each column of this plan's row on the sheet that has a value.
| $ per 1,000 | $0.00 |
|---|---|
| Billing | free |
| Per | call |
|---|
| $ per 1,000 | $0.00 |
|---|
| $ per 1,000 | $0.00 |
|---|
| Their pitch | Email validation tells you whether an address will bounce before you send to it. Send one email, we return a verdict, a deliverability score out of 100, and flags for catch-all, role-based, disposable, and consumer addresses. |
|---|
| Freshness | live |
|---|---|
| Keep data | a limited, non-exclusive, non-transferable, non-sublicensable right to (A) view and store the Prospect Data [...] Prospect Data and Usage Data are Confidential Information of Fiber AI. [...] After any expiration or termination of these Terms, or at any time upon request from Fiber AI, Customer will immediately return or destroy (at Fiber AI's sole direction) all materials or media containing any Confidential Information |
| Use data | solely for purposes of conducting business-to-business sales, marketing, or business development activities and for Customer's other internal business purposes (the "Permitted Uses"). Customer may not resell, transfer, assign, or sublicense Customer's rights under these Terms to any third party or use the Services to run an outsourcing business or provide services for the benefit of any third party. [...] Customer (A) will not, and will ensure that Customer Personnel do not, incorporate any Prospect Data into Customer's products or services or otherwise resell, sublicense, or distribute any Prospect Data, (B) will not [...] present the Prospect Data so that it appears to be made available by any third party, (C) will process all Prospect Data in accordance with Laws, including Privacy and Data Laws [...] (F) not use the Services, including Prospect Data, to determine a consumer’s eligibility for (i) credit or insurance for personal, family or household purposes, (ii) employment or (iii) a government license or benefit or (iv) any other purpose governed by the Fair Credit Reporting Act [...] Customer will not [...] (h) develop any scripts or software applications that interact with or integrate with the Services unless first authorized in writing by Fiber AI [...] The Services are currently authorized to be used only in the United States to facilitate business-to-business sales, marketing, or business development communications with individuals in the United States |
| Pay | $0 |
|---|---|
| You get | 500 credits |
| Enough for | 500 calls, once |
| Expires | when a canceled trial's period ends, credits zero out |
| Batch | 1 |
|---|
| Answer | in the call |
|---|
| You send | |
|---|---|
| Method | POST |
| Path | /v1/validate-email/single |
| Plan | 7-day free trial |
|---|---|
| Who can get it | anyone with a payment method on file, to use only in the United States |
The 18 fields in the plan's answer
email, verdict, deliverability score, catch-all, role-based, disposable, consumer, email provider, charge method, credits charged, credits refunded, charge message, credits remaining, low credit message, get more credits URL, warning field, warning message, advice