1Lookup checks emails, phones and IPs on one credit balance,where Clearout sells phone checks as a separate product.
1Lookup checks the email, the phone and the IP behind a signup on one API key and one credit balance, and every email check returns a fraud score and risk level. Clearout's core credits cover email tools, and its phone verification is a separate ClearoutPhone product.
Every email check returns a fraud score.
Each 1Lookup email check returns deliverability, a fraud score from 0 to 100, a risk level with the reasons behind it, and disposable, role-account and catch-all flags, for 1 credit.
One key covers phone, email and IP checks.
The same API key and credit balance runs phone validation, live HLR status, Do Not Call and TCPA litigator scrub, IP lookup and the rest of 1Lookup's 44 data products.
Email Specialist vs. Multi-Service Platform
Why multi-service validation wins for modern applications
| Feature | 1Lookup | Clearout | Winner |
|---|---|---|---|
Data products on one key One API key and one credit balance | 44 products: phone, email and IP checks, people, company and social data | Email verification, email finder, form and CRM tools | |
Phone and IP checks Check the whole signup, not just the email | Phone validation, live HLR status, DNC scrub and IP lookup | No standalone phone or IP API in its core credits | |
Pricing Model One balance covers phone, email, IP and every other product | One credit balance shared by 44 products on one key | Credit-based pricing tiers | |
Integration Method Optimized for real-time validation | Modern REST API | REST API + bulk processing |
Every phone check returns a risk level, not just valid or invalid.
A number can be well formed and still be disconnected, a VoIP line, or on the Do Not Call list. 1Lookup's phone validation returns a risk level with the reasons behind it, the line type, a VoIP flag and Do Not Call status on the same call, for 1 credit, and Phone Spam Check adds a spam score and spam reports for 1 more.
Risk level on every check
A risk level and the risk factors that set it, on every phone validation
Do Not Call status
Know a number is on the Do Not Call list before you call or text it
Spam reports
Phone Spam Check flags numbers reported for spam and robocalls
Example response
One credit balance
Every product below draws from the same credits, at $0.00200–$0.00495 per credit depending on plan.
- Phone validation1 credit
- Email verification1 credit
- IP intelligence1 credit
- Spam and risk score1 credit
Buy credits once, spend them on whatever you need to check
Most validation tools sell one channel, so a team checking phones, emails and IPs ends up with three vendors, three invoices and three unused balances. 1Lookup bills all of them from a single credit pool on a monthly plan, with no contract, and leftover credits carry into the next quarter instead of expiring at midnight.
Phone, email and IP on one API
One key, one balance, one integration
Phone data refreshed daily
From FCC and carrier sources
No contract
Monthly plans, with three-month credit rollover
A full line profile, not a status code.
Phone validation returns the carrier, line type, porting status and time zone for 1 credit, and HLR Lookup adds whether the mobile is switched on, the network it is on now and whether it is roaming, for 5. That is the difference between knowing a number is formatted correctly and knowing whether a message sent to it will arrive.
Complete Phone Profile
Simple Migration from Clearout
`https://api.clearout.io/v2/email_verify/instant`,
{
method: 'POST',
headers: {'Authorization': `Bearer ${token}`},
body: JSON.stringify({email})
}
);
`https://app.1lookup.io/api/v1/email`,
{
method: 'POST',
headers: {'Authorization': `Bearer ${key}`},
body: JSON.stringify({email})
}
);
What migrating from Clearout actually involves
Both are REST APIs returning JSON, so the move is a URL, a key and a field mapping rather than a rewrite. The call above is the real shape of each request. Where the work usually goes is the response: our field names differ, and anything you were deriving from a status code may already be a field you can read directly.
One endpoint per channel
Phone, email and IP, same key and same balance
Email Support to Dedicated CSM
Support level rises with the plan, not with a separate fee
Try before you migrate
7-day free trial with credits, no contract to unwind
Email Cleaning vs. Complete Validation
Choose based on your validation scope
Clearout is best for:
- • Teams needing only email validation
- • Email list cleaning workflows
- • Basic email verification
- • Straightforward validation requirements
1Lookup is best for:
- • Full user validation (email + phone + IP)
- • Fraud scores on email and IP checks
- • High-performance applications
- • Multi-service validation requirements
Why Choose Multi-Service?
One signup carries an email, a phone and an IP. 1Lookup checks all three with one API key, and scores the email and the IP for fraud.
Clearout vs 1Lookup FAQ
Common questions about Clearout and switching to 1Lookup
What is Clearout?
Clearout is an email verification and email finder service used to clean mailing lists and improve deliverability. You upload or send email addresses and it checks whether each one is valid, deliverable, and safe to send to, flagging risks like invalid, disposable, or role-based addresses. It also offers an email finder and prospecting features for building B2B contact lists. Its focus is email data specifically, rather than verifying phone numbers or IP addresses.
How much does Clearout cost?
Clearout uses a credit-based, prepaid pricing model where one email verification costs one credit. As of publication, pay-as-you-go credits start around $21 for 3,000 credits, and monthly subscription plans start around $58 per month for 10,000 credits, with unused credits rolling over. New accounts also receive a small batch of free credits to test the service. Because email finding and prospecting consume more credits per lookup, your actual cost depends on which features and volume you use, so check Clearout's pricing page for an exact quote.
What is the best Clearout alternative?
The best alternative depends on what you need to verify. If you only need to clean email lists, other dedicated email verifiers may be comparable. If you need to confirm that a phone number, email, and IP address are all valid and reachable, a verification-focused platform like 1Lookup is a closer fit, because it combines email validation with phone and IP checks in a single API.
How is 1Lookup different from Clearout?
Clearout specializes in email verification and email finding, while 1Lookup is a data-verification API that validates phone numbers, emails, and IPs through one API and a single universal credit system. 1Lookup's data is updated daily from FCC and carrier sources, and it adds carrier/HLR lookup, reverse lookup, and fraud and IP intelligence. Both are strong at what they do; 1Lookup's main edge is unifying phone, email, and IP verification in one place rather than covering email alone. If your use case is purely cleaning email lists, Clearout may be sufficient; if you need cross-channel verification, 1Lookup consolidates it.
Can I try 1Lookup for free?
Yes. 1Lookup offers a 7-day free trial so you can test phone, email, and IP verification through one API before committing. You can validate real records and see how the single universal credit system works across all three checks during the trial. That makes it easy to compare 1Lookup's results against Clearout or your current email-verification workflow.
Is Clearout worth it in 2026?
Clearout is worth it for teams cleaning email lists at real volume: credits never expire, unused subscription credits roll over, and published pay-as-you-go rates fall to $1.40 per 1,000 at 1M credits, backed by a 97% deliverability guarantee. The catch is the buying shape: the smallest pay-as-you-go purchase is 5,000 credits ($40) at a comparatively pricey $8 per 1,000, and the email finder consumes 4 credits per non-role email found, so credits stretch less far than the headline rate suggests. It is also email-centric, with full phone verification split into a separate ClearoutPhone product and no IP intelligence in the core credit system. If you need phone, email, and IP checks on one balance, a multi-channel per-lookup API like 1Lookup covers all three without stitching products together.
Upgrade to Complete Validation
Why validate just emails when you can validate everything? Get a fraud score on every email check, plus phone and IP checks, on one credit balance.
7-day free trial • Email + Phone + IP • One credit balance
1Lookup vs Clearout: the same criteria, side by side
Both products measured on identical criteria, with Clearout’s numbers taken from its own published pricing.
1lookup1lookup.ioMulti-channel validation- Phone
- IP
clearout.ioEmail verification- Clearout · Starts at
- $16/mo billed annually ($192/yr) for 3,000 credits/mo (Starter plan); $23/mo month-to-month; pay-as-you-go starts at $40 for 5,000 credits
- 1Lookup: $99/mo for 20,000 credits ($4.95 per 1,000, down to $2.00 on Enterprise)
- Clearout · Free trial
- No time-limited trial; the 100 free signup credits serve as the evaluation (Clearout explicitly positions them that way in lieu of refunds when switching plans)
- 1Lookup: 7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise, with no payment today
- Clearout · Do credits expire?
- No, pay-as-you-go credits never expire, and unused subscription credits roll over month to month; exception: specially discounted deal credits may carry an expiry per the deal's terms
- 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 | Credit-based, with a choice of pay-as-you-go one-time credit packs (tiered per-credit slabs) or monthly/annual subscriptions that auto-deposit credits each month; one credit pool is shared across Email Verifier, Email Finder, Form Guard and Data Pulse |
| Starting price | $99/mo for 20,000 credits ($4.95 per 1,000, down to $2.00 on Enterprise) | $16/mo billed annually ($192/yr) for 3,000 credits/mo (Starter plan); $23/mo month-to-month; pay-as-you-go starts at $40 for 5,000 credits |
| Free option | Free single lookups via the online tools at 1lookup.io/tools, no account required | 100 free credits on signup (one-time, no expiry, no credit card required) |
| Free trial | 7-day free trial on every plan: $5 of credits on Starter, $20 on Growth, Professional, and Enterprise, with no payment today | No time-limited trial; the 100 free signup credits serve as the evaluation (Clearout explicitly positions them that way in lieu of refunds when switching plans) |
| Do credits expire? | Unused monthly credits roll over for 3 months; separately purchased credits last 1 year | No, pay-as-you-go credits never expire, and unused subscription credits roll over month to month; exception: specially discounted deal credits may carry an expiry per the deal's terms |
What Clearout costs at volume
| Volume | Clearout price | Per 1,000 |
|---|---|---|
| 5,000 credits (pay-as-you-go, minimum purchase) | $40 | $8.00 |
| 10,000 credits (pay-as-you-go) | $65 | $6.50 |
| 100,000 credits (pay-as-you-go) | $400 | $4.00 |
| 1,000,000 credits (pay-as-you-go) | $1,400 | $1.40 |
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: Clearout 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 | Clearout |
|---|---|---|
| Minimum commitment | None. Monthly plans with no contract and no minimum volume; cancel any time | — |
| Cost per extra seat | — | Team Account Member Seat Limit add-on: $25 per additional seat. |
| Going over your quota | — | Pricing FAQ: 'If you need additional credits before the month ends, you can either upgrade your subscription for more credits or make a one-time payment to top up instantly.' No automatic overage billing is published. |
| API access | Included on every plan and during the free trial; there is no tier that unlocks it | Included on all plans. A free account gets 100 free credits and instant access to the API; paid tiers only raise rate limits and credit volume. |
| Rate limit | 1,000 requests per minute on standard accounts, with higher limits available on request | Base limit 100 requests per 60-second window, HTTP 429 with error 1030 on exceed. Effective RPM varies by plan and credit tier: subscription Instant Email Verify 25 RPM at 3,000 credits, 55 RPM at 10,000, 135 RPM at 100,000, 300+ RPM at 1,000,000+; pay-as-you-go 20 RPM at 5,000 credits, 70 RPM at 100,000, 190+ RPM at 1,000,000+. |
| Compliance | — | ISO 27001:2022 (renewed 23 January 2026), SOC 2 Type II (renewed 19 March 2026), ISO 27701:2019, GDPR compliant as both Data Processor and Data Controller. |
| Support | Starter: Email Support; Growth: Priority Email & Chat Support; Professional: Chat + Live Meeting; Enterprise: Dedicated CSM | Email support@clearout.io, phone +1 (302) 565-2212, and live chat on the site. The enterprise page lists 24/7 Support and a Dedicated Account Manager. No response-time SLA is published. |
Clearout fine print worth reading twice
Published terms that change what Clearout costs or what you can do with it. Each one links to the Clearout page it was read on, because a claim about somebody else’s contract should be checkable in one click.
Adding team members costs $25 per additional seat as a paid add-on.
Read it on Clearout’s siteRaising the Email Verifier API rate limit costs $99 per month for each additional 100 requests per minute, and the same $99 per 100 RPM applies to the Email Finder API.
Read it on Clearout’s siteRunning more than one bulk verification job at a time costs $49 per month per additional parallel run, with the same $49 per month charge for parallel bulk email finder and parallel bulk prospect enrichment runs.
Read it on Clearout’s siteExpanding the allow/block domain list costs $49 per additional 100 domains.
Read it on Clearout’s siteSwitching plans requires paying the full subscription amount again: 'When switching plans, whether upgrading or downgrading, the full subscription amount is required. We do not offer partial refunds.'
Read it on Clearout’s siteVerification result files automatically expire 30 days after verification and can no longer be downloaded, showing 'Result expired'.
Read it on Clearout’s siteAPI throughput is tied to the plan and credit tier, so a 3,000-credit subscription is capped at 25 requests per minute while 1,000,000+ credits unlocks 300+ requests per minute.
Read it on Clearout’s siteThe lowest per-credit rate requires paying a year up front: the 3,000-credit Starter plan is $23 per month billed monthly versus $192 per year (equivalent to $16 per month), and the 10,000-credit Pro plan is $58 per month versus $384 per year.
Read it on Clearout’s site
What you actually work in
Clearout is a screenshot of the logged-in Clearout web app: top nav (Dashboard, Email Verifier, Email Finder, Prospect, Reverse Lookup, Apps, Integrations), the Lists page with per-list verified-result tables (Total, Valid, Invalid, Catch All, Unknown, Duplicate, Syntax Error, Disposable, Gibberish, Free, Role), pie charts and Download Result buttons product you log into. 1Lookup is an API and a dashboard you mostly do not log into: you call it from the system that already has the record. Which of those you want is usually the whole decision, so here is theirs.
Clearout interface
Clearout’s API reference
Their public developer documentation, so you can judge the integration before you start one.
1Lookup
Clearout
Where 1Lookup wins
- 44 data products on one API key and one credit balance: phone, email and IP checks, people and company data, social data and more
- Carrier, line type and a risk level on every phone validation, for 1 credit
- Live HLR status, DNC and TCPA litigator scrub, reverse phone lookup and skip trace on the same key
- An MCP server for AI agents, plus live Zapier, Make and n8n apps
- Self-serve up to 1,000,000 lookups a month at $0.0020 each, with no contract and 3-month credit rollover
Where Clearout wins
- Credits never expire: pay-as-you-go credits have no expiry and unused subscription credits roll over month to month
- 97% deliverability guarantee backed by a 30-day refund policy (subject to conditions)
- One credit pool spans multiple tools - email verification, email finder, real-time form validation (Form Guard) and CRM data monitoring (Data Pulse) - plus a large integration ecosystem (certified HubSpot app, Zoho CRM, Mailchimp, forms tools)
- Self-serve pricing scales to very high volumes: published slabs down to $1.40/1k at 1M credits and $1.00/1k at 10M+, with custom deals above 20M credits
Clearout pricing and product facts verified against clearout.io as of October 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 confirm phone numbers and IP addresses as well as email, all through one API and one credit balance.
Consider ClearOut instead if: your focus is cleaning email lists and finding B2B email addresses, and you do not need phone or IP checks.