LeadList Verifier vs Clearout
Clearout is a budget-friendly single-pass verifier that competes on per-email price. LeadList Verifier’s two-pass engine costs more per email and resolves the catch-all segment Clearout leaves as accept-all. Below: the real pricing math, where each tool wins, and what migration looks like.
Quick verdict
Choose Clearout if
Per-email cost is the primary decision criterion and your lists have low catch-all density. Standard single-pass verification is enough for your use case.
Choose LeadList Verifier if
Your lists are B2B-heavy where catch-all addresses dominate the unresolved segment. Cost per recovered deliverable lead matters more than cost per email submitted.
The accuracy gap
Single pass vs two pass.
Clearout runs a primary SMTP check that handles roughly 70 to 85 percent of a typical list cleanly. That’s the same primary check LeadList Verifier runs in Pass 1. The accuracy gap shows up on the remaining segment: catch-all (accept-all) domains, where the receiving server accepts mail for any address regardless of whether the specific mailbox exists.
Clearout flags catch-all addresses and stops. Detection without resolution. The buyer is left to decide whether to send to a segment of unverified addresses.
LeadList Verifier’s two-pass engine treats catch-all detection as an intermediate result. A proprietary second pass probes the specific mailbox behind the catch-all domain and returns a definitive verdict: deliverable, undeliverable, or risky with a confidence score. On production B2B lists, the second pass recovers around 72 percent of the catch-all segment as verified deliverable.
25-30%
of B2B addresses sit on catch-all domains
72%+
of catch-alls resolved by our second pass
100
free credits on signup, never expire
Pricing
Side-by-side pricing at common volumes.
Both products use credit-pack pricing with no subscription required. Clearout is cheaper per email at every tier. The gap narrows at higher volumes. The honest framing isn’t which is cheaper outright, it’s which delivers more usable leads per dollar on lists with real catch-all density.
| Volume | Clearout | LeadList Verifier |
|---|---|---|
| 5,000 emails | $21 | $30 |
| 10,000 emails | $39 | $55 |
| 50,000 emails | $169 | $220 |
| 100,000 emails | $299 | $360 |
| 250,000 emails | $649 | $675 |
Pricing as of May 2026. Verify current pricing on clearout.io. LeadList Verifier pricing page.
Features
Feature comparison.
| Feature | Clearout | LeadList Verifier |
|---|---|---|
| Catch-all address verification (mailbox-level) | No, flags as accept-all | Yes, two-pass |
| Catch-all returns deliverable / risky / undeliverable verdict | No | Yes, with confidence score |
| Primary SMTP verification | Yes | Yes |
| Real-time verification API | Yes | Yes |
| Bulk CSV upload | Yes | Yes |
| Webhook delivery | Yes | Yes, HMAC-signed |
| Pricing model | Credit packs | Credit packs |
| Subscription required | No | No |
| Credit expiration | Never | Never |
| Free credits on signup | 100 | 100 |
| Per-email cost at 10K | $0.0039 | $0.0055 |
| Per-email cost at 250K | $0.0026 | $0.0027 |
Real cost math
Per-list cost on a B2B list.
Consider a 10,000-address B2B list with 25 percent catch-all density. Clearout resolves the 7,500 clear-cut addresses for $39 and flags 2,500 as accept-all. LeadList Verifier resolves the same 7,500 plus typically recovers around 1,800 catch-alls as verified deliverable, for $55 total.
Real test data, 10,000-address B2B list
Resolved by primary pass
7,438
Accept-all flagged on single pass
2,562
Recovered by second pass
1,847
That’s an additional 18 percent of the list returned as deliverable, addresses Clearout would have left as accept-all. The extra $16 for the second pass typically pays for itself in recovered leads on B2B work.
When Clearout is the right choice
- Per-email cost is the primary buying decision and catch-all density on your lists is low.
- You verify B2C lists or mature databases where addresses are mostly clear-cut.
- You're comfortable with the accept-all segment staying unresolved.
- Standard single-pass verification is enough for your use case.
When LeadList Verifier is the right choice
- Your lists are B2B-heavy and catch-all addresses dominate the unresolved segment.
- You want every address turned into a deliverable / undeliverable / risky verdict, not a status flag.
- Cost per recovered deliverable lead matters more than cost per email submitted.
- You need HMAC-signed webhooks and a structured public API.
Migration
Switching from Clearout.
Most teams don’t cut over all at once. The usual pattern is to keep Clearout on the primary pass for lists that are mostly clear-cut, and add LeadList Verifier on the back end to resolve the accept-all segment.
01
Export your Clearout results
Download the CSV. Filter on addresses marked 'accept-all' or 'unknown'. That's the segment LeadList Verifier targets.
02
Upload to LeadList Verifier
Drop the filtered CSV into the upload zone. The email column is auto-detected. Credit cost is shown before you commit.
03
Run two-pass verification
The primary pass confirms the SMTP result. The proprietary second pass resolves the accept-all segment into deliverable, undeliverable, or risky verdicts.
04
Merge recovered addresses back
Export the deliverable segment from LeadList Verifier. Append to your Clearout deliverable list. Typical recovery: 60 to 75 percent of the accept-all segment becomes verified deliverable.
FAQ
Common questions.
How does Clearout handle catch-all domains?
Clearout detects catch-all (accept-all) configurations and returns the address with that status flag. The specific mailbox is not verified beyond detection. On B2B lists where catch-all density is 25 to 30 percent, that segment stays unresolved.
Is Clearout cheaper than LeadList Verifier?
Yes, on raw per-email cost Clearout is cheaper at every tier. The gap narrows at higher volumes (at 250K the two are within $26 of each other). The honest comparison is per recovered deliverable lead, not per email. LeadList Verifier costs more because the proprietary second pass on the catch-all segment is real additional work.
How does the per-list cost compare on B2B lists?
Consider a 10,000-address B2B list with 25 percent catch-all density. Clearout resolves 7,500 addresses for $39 and flags 2,500 as accept-all. LeadList Verifier resolves 7,500 the same way plus typically recovers around 1,800 catch-alls as verified deliverable, for $55 total. Clearout: usable deliverable leads cost ~$0.007 each. LeadList Verifier: usable deliverable leads cost ~$0.007 each but you have ~1,800 more of them.
Can I migrate from Clearout?
Yes. Export your Clearout results, isolate the segment marked 'accept-all' or 'unknown', and upload that CSV to LeadList Verifier. Run two-pass verification on the unresolved segment. Most teams recover 60 to 75 percent of that segment as verified deliverable, then merge the recovered addresses back into their deliverable list.
Does LeadList Verifier have an API like Clearout?
Yes. A REST API with bearer-token auth, real-time single-email verification, bulk endpoints up to 10,000 per call, and HMAC-signed webhook delivery. See the API reference for full documentation.
Is there a free trial?
Both verifiers offer 100 free credits on signup, no credit card required. Use them on a real list to compare results before purchasing more.
Resolve your accept-all rows.
Re-run the accept-all segment from your Clearout export with 100 free credits. See how many come back deliverable.