ZeroBounce Cleans Lists.1Lookup Prevents Problems.
ZeroBounce focuses on cleaning existing email lists. 1Lookup prevents bad emails from entering your system in the first place. Real-time validation, fraud detection, and superior accuracy for modern businesses that need instant results.
Real-Time Validation
ZeroBounce leads with list upload and batch processing. 1Lookup validates a single email over the API as it arrives, for form validation and user registration.
Better Accuracy
Enterprise deliverability accuracy vs ZeroBounce's 97%. Our advanced algorithms and real-time verification deliver superior results.
Prevention > Cleanup
Prevent bad emails at the source with instant validation during signups and forms: no more clean-up cycles.
ZeroBounce vs 1Lookup FAQ
Common questions about ZeroBounce and switching to 1Lookup
What is ZeroBounce?
ZeroBounce is an email verification and deliverability platform. It validates email addresses to catch invalid, spam-trap, and abuse addresses before you send, and it also offers related tools such as an email finder and deliverability testing. Its core focus is cleaning and validating email lists.
How much does ZeroBounce cost?
ZeroBounce uses volume-based pricing built around email verification credits. As of publication, it offers a free tier of 100 verifications per month, pay-as-you-go credits that get cheaper at higher volumes, and monthly subscription plans. Paid credits generally don’t expire, and subscription plans roll unused monthly credits forward, though free monthly credits do not. Exact pricing depends on the plan and volume you choose, so check ZeroBounce’s pricing page for current rates.
What is the best ZeroBounce alternative?
The best alternative depends on whether you only need email validation or also phone and IP verification. 1Lookup is a strong ZeroBounce alternative because it validates phone numbers, emails, and IP addresses through one API and one universal credit system, rather than focusing on email alone. That makes it a good fit for teams that want phone, email, and fraud checks unified in a single integration.
How is 1Lookup different from ZeroBounce?
ZeroBounce specializes in email verification and list cleaning, while 1Lookup is a broader data-verification API covering phone, email, and IP in one place. 1Lookup uses a single universal credit system across every lookup type and refreshes its data daily from FCC and carrier sources, and it also offers carrier/HLR lookup, reverse lookup, and fraud/IP intelligence. If you need more than email hygiene, 1Lookup consolidates several verification tools into one API.
Can I try 1Lookup for free?
Yes. 1Lookup offers a 7-day free trial so you can test phone, email, and IP verification before committing. You sign up and start validating using the same universal credits that power every lookup type.
1Lookup vs ZeroBounce: the same criteria, side by side
Both products measured on identical criteria, with ZeroBounce’s numbers taken from its own published pricing.
1lookup1lookup.ioMulti-channel validation- Phone
- IP
zerobounce.netEmail verification- ZeroBounce · Starts at
- ZeroBounce ONE subscription from $99/mo at the 10,000-credit minimum ($9.90 per 1,000 verifications); smaller quantities are no longer publicly priced - the earlier $39/2,000-credit pay-as-you-go tier is gone from the live pricing page
- 1Lookup: $99/mo for 20,000 credits ($4.95 per 1,000, down to $2.00 on Enterprise)
- ZeroBounce · Cheapest published per 1,000
- $9.90 at their largest published tier
- 1Lookup: $2.00 per 1,000 at 1,000,000 lookups/mo
- ZeroBounce · Free trial
- No separate time-limited trial; the free Freemium account (100 monthly validation credits, business/premium email domain required) serves as the trial
- 1Lookup: 7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise (card required, nothing charged up front)
- ZeroBounce · Do credits expire?
- No, pricing page states credits never expire (stated for both ONE and Freemium)
- 1Lookup: Unused monthly credits roll over for 3 months; separately purchased credits last 1 year
| Criteria |  1Lookup | |
|---|---|---|
| Contact-data coverage | EmailPhoneIP | EmailPhoneIP |
| Pricing model | Monthly plans with universal credits; core phone, email and IP lookups cost 1 credit, enrichment and intelligence products cost more | Subscription-led: the ZeroBounce ONE plan (from $99/mo, minimum 10,000 credits, annual billing saves 20%) is the headline offer; per-credit dollar prices for other quantities sit behind an in-page calculator and are not statically published; enterprise/custom pricing above 1M credits |
| Starting price | $99/mo for 20,000 credits ($4.95 per 1,000, down to $2.00 on Enterprise) | ZeroBounce ONE subscription from $99/mo at the 10,000-credit minimum ($9.90 per 1,000 verifications); smaller quantities are no longer publicly priced - the earlier $39/2,000-credit pay-as-you-go tier is gone from the live pricing page |
| Free option | Free single lookups via the online tools at 1lookup.io/tools, no account required | 100 email validations/mo free (refills monthly, business/premium email domain required to claim), plus 10 Email Finder queries, 1 inbox placement test, 1 email server test, and 1 blacklist monitor |
| Free trial | 7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise (card required, nothing charged up front) | No separate time-limited trial; the free Freemium account (100 monthly validation credits, business/premium email domain required) serves as the trial |
| Do credits expire? | Unused monthly credits roll over for 3 months; separately purchased credits last 1 year | No, pricing page states credits never expire (stated for both ONE and Freemium) |
What ZeroBounce costs at volume
| Volume | ZeroBounce price | Per 1,000 |
|---|---|---|
| 10,000 verifications (ZeroBounce ONE minimum) | $99/mo subscription (annual billing saves 20%) | $9.90 |
| Other quantities | Priced only via the calculator on zerobounce.net/pricing; dollar amounts are not statically published | - |
| Above 1,000,000 credits | Contact sales (enterprise) | - |
For scale: 1Lookup’s plans work out to $4.95 per 1,000 lookups on Starter down to $2.00 per 1,000 on Enterprise, with every lookup type (phone, email, IP, spam) drawing from the same credits. Pricing models differ (subscription vs pay-as-you-go), so compare at your real monthly volume.
Before you sign: ZeroBounce and 1Lookup on the operational terms
The terms that decide what a year actually costs, rather than what the first month does. A blank means we could not verify it on either product’s published pages, not that the answer is nothing.
| Term | 1Lookup | ZeroBounce |
|---|---|---|
| Minimum commitment | None. Monthly plans with no contract and no minimum volume; cancel any time | No minimum term. Terms of Use state the service "is made available on a month-to-month subscription basis" and the pricing page labels monthly rates "No contract. Cancel anytime." Minimum purchase sizes apply: ZeroBounce ONE requires at least 10,000 credits/month ($99/mo) and Pay-As-You-Go starts at 2,000 credits ($39). |
| Going over your quota | — | No overage rate published. Credits are prepaid; usage beyond the monthly ZeroBounce ONE allotment requires buying Pay-As-You-Go credits, and ONE subscribers get 15% off Pay-As-You-Go credits and autopay. |
| API access | Included on every plan and during the free trial; there is no tier that unlocks it | No tier gate published. "Multiple API Keys" is listed under "Included with all ZeroBounce Accounts", while "Premium API Rate-Limits" is listed only as a ZeroBounce ONE benefit. |
| Rate limit | 1,000 requests per minute on standard accounts, with higher limits available on request | — |
| Uptime SLA | — | 99.99% API uptime SLA stated on https://www.zerobounce.net/trust, with 90-day uptime history at status.zerobounce.net. No service-credit or remedy terms are published. |
| Compliance | — | SOC 2 Type 2 (since 22 March 2022), ISO/IEC 27001:2022 (certified by MSECB), HIPAA SOC 2 Type 2 (certified August 2023, BAA available), EU GDPR, EU-U.S. and Swiss-U.S. Data Privacy Framework, CCPA/CPRA, PCI DSS, BitSentinel (2023), BBB Accredited Business |
| Support | Starter: Email Support; Growth: Priority Email & Chat Support; Professional: Chat + Live Meeting; Enterprise: Dedicated CSM | 24/7 support via live chat and email (support@zerobounce.net); the contact page states 'We're online 24/7. Chat with us anytime!'. Products & Sales by phone US 1 888 500 9521, UK +44 330 808 4814, Monday-Friday 5AM-7PM EST. ZeroBounce ONE lists 'VIP 24/7 Support'. |
ZeroBounce fine print worth reading twice
Published terms that change what ZeroBounce costs or what you can do with it. Each one links to the ZeroBounce page it was read on, because a claim about somebody else’s contract should be checkable in one click.
Credits purchased by customers registering after June 1, 2026 expire two years from the date of the most recent credit purchase, while the pricing page states "Credits never expire".
Read it on ZeroBounce’s siteAll sales and prepayments for credits are final and non-refundable.
Read it on ZeroBounce’s siteZeroBounce reserves the right to terminate any account that remains inactive for a continuous period of two years, where inactivity means no login, no authenticated API request, no financial transaction and no settings change.
Read it on ZeroBounce’s siteThe 30-day money-back guarantee applies only to a customer's first ZeroBounce ONE subscription and only if cumulative usage stays under 500 emails validated, 5 inbox placement tests, 5 email server tests, 15 warmup emails and 1 day of blacklist or DMARC monitoring.
Read it on ZeroBounce’s siteThe advertised 20% saving on ZeroBounce ONE requires annual billing ($948 per year) rather than the $99 monthly rate.
Read it on ZeroBounce’s siteEmail Finder consumes 20 credits per successful query rather than the 1 credit used by email validation and AI scoring.
Read it on ZeroBounce’s site
ZeroBounce’s API reference
Their public developer documentation, so you can judge the integration before you start one.
1Lookup
ZeroBounce
What reviewers say about ZeroBounce
Trustpilot
4.9 out of 5
from 2,100+ reviews
(source: Trustpilot, opens in a new tab)G2
4.7 out of 5
from 1,354+ reviews
(source: G2, opens in a new tab)Capterra
4.8 out of 5
from 587+ reviews
(source: Capterra, opens in a new tab)
Scores are shown as each platform published them, last confirmed July 2026. Counts are floored to what could be confirmed at that check, so the platforms may show more.
Where ZeroBounce wins
- Advertises a 99.6% email validation accuracy guarantee
- Purchased credits never expire, and 'unknown' results are not charged
- Broad deliverability suite beyond validation on one credit system: AI scoring, Email Finder, inbox placement tests, blacklist and DMARC monitoring, warmup, email server tests (18 tools claimed)
- Genuinely free recurring tier: 100 validations refill every month on Freemium, and purchased credits never expire
Where 1Lookup wins
- Phone, email, and IP validation in one API with one universal credit balance
- Phone data refreshed daily from FCC and carrier sources
- Carrier/HLR lookup, line type, spam score, and reverse lookup included alongside validation
- Self-serve plans with no contracts and 3-month credit rollover
ZeroBounce pricing and product facts verified against zerobounce.net as of July 2026. Prices change; always confirm on the vendor’s site. 1Lookup numbers come from the live rate card.
Who this is for
A quick, honest read on which tool fits your use case.
Choose 1Lookup if: you need to validate phone numbers and IP addresses as well as email, all through one real-time API and one universal credit system.
Consider ZeroBounce instead if: your focus is email deliverability and list cleaning, with tools like an email finder, and you do not need phone or IP checks.