Email verification for B2B data providers and enrichment vendors
A B2B data provider's records decay as people change jobs, so an address that was right at collection may bounce months later. Re-verify records before you deliver or expose them, and label anything the mailbox check cannot confirm as unconfirmed. Business ($99 a month) covers 300,000 emails a month and 100,000 API calls; Agency ($249) covers 750,000 and 300,000.
Plan details as of 23 Oct 2026. The pricing page is the source of truth.
The use case
You run a contact database or an enrichment product that returns emails to customers. Records found weeks or months ago need checking again before they go out. Bulk re-verification of the records you deliver most, plus an API call at the moment a record is requested, keeps the status you show close to what a mail server says today. For one-off list sales, see the list brokers page.
The workflow
- 1
Re-verify the records you deliver most
Export the segment that is requested most often and verify it as a bulk file. Very large files run for days on shared capacity, so schedule them ahead.
- 2
Verify at request time by API
Call the API when a customer requests or enriches a record. Each key allows up to 120 calls a minute.
- 3
Store the status and the date
Keep the status, reason and check date with each record so customers can see how recent it is.
- 4
Label risky as unconfirmed
Show valid as verified. Show risky (catch-alls, providers that hide mailbox status) as unconfirmed, never as verified.
- 5
Separate products or customers
On Agency, file bulk runs under a workspace per product or customer so history and exports stay apart.
Which plan fits
Business ($99) for 300,000 emails a month and 100,000 API calls. Agency ($249) for 750,000 emails and 300,000 calls. Past the monthly volume, bulk lists keep running in a slower shared lane; API calls past the included number are billed per 1,000 on monthly billing. If you re-verify tens of millions of records a month, this self-serve plan is not sized for you.
Full speed is a monthly volume, not a promise of hours. Mailbox checks are paced and the day's check capacity is shared between customers, so a very large list takes days. It queues rather than failing, and the job card shows an estimated finish time. Plan client deadlines around that.
We do not vouch for how records were collected. Data providers remain responsible for consent, notices and the lawful sale or processing of the data.
What does your client book cost to verify each month?
Enter how many clients you run lists for and the size of a typical list each month. The starting numbers are only a starting point. Nothing is sent anywhere.
600,000 addresses a month. Cheapest SimpleVerifier plan that covers it at full speed: Agency, $249 a month. 15 seats and client workspaces.
| Verifier | Cheapest published route, per month | Source |
|---|---|---|
| SimpleVerifier Agency | $249 (flat, not per email) | Our pricing |
| MillionVerifier | $449 (Pay as you go: 1,000,000-credit pack at $0.45 per 1,000) | Pricing pageread 2026-11-02 |
| DeBounce | $750 (Pay as you go: 1,000,000-credit pack at $0.75 per 1,000) | Pricing pageread 2026-11-02 |
| NeverBounce | $999 ($999/mo plan with 1,000,000 a month) | Pricing pageread 2026-11-02 |
| Clearout | $1,260 ($1,260/mo plan with 1,000,000 a month) | Pricing pageread 2026-11-03 |
| Bouncer | $1,600 ($1,600/mo plan with 1,000,000 a month) | Pricing pageread 2026-11-02 |
| Emailable | $1,785 ($1,785/mo plan with 1,000,000 a month) | Pricing pageread 2026-10-30 |
| ZeroBounce | $2,499 ($2,499/mo plan with 1,000,000 a month) | Pricing pageread 2026-10-30 |
Competitor figures are the cheapest published route that covers the volume in one month: a subscription tier whose allowance covers it, or the pay-as-you-go pack bought again each month. They price verification credits only; we have not compared their team features. Prices change, so check each page before you decide. Full speed is a monthly volume, not a promise of hours. Mailbox checks are paced and the day's check capacity is shared between customers, so a very large list takes days. It queues rather than failing, and the job card shows an estimated finish time. Plan client deadlines around that.
Start with your own list
Sign in with Google and check your first 100 addresses free, no card, then download the results. When you are ready, Business is $99 a month and Agency is $249 a month, monthly billing, cancel anytime.
A walkthrough is a conversation by email with the support team. See also contact.
Common questions
- How long does a verified result stay fresh?
- Confirmed mailboxes are cached for about two weeks, so re-checking an overlapping file in that window costs nothing. After that, addresses can go bad and should be checked again.
- Can I call an address verified if you could not confirm it?
- We never do. Anything the mailbox check could not confirm is returned as risky, and your product should say the same.
- What does the priority lane do, and how fast is it?
- Big lists on Business and Agency go ahead of other big lists in the shared queue, within the plan's monthly full-speed volume. Small lists under 2,000 rows always run first on every plan. Full speed is a monthly volume, not a promise of hours. Mailbox checks are paced and the day's check capacity is shared between customers, so a very large list takes days. It queues rather than failing, and the job card shows an estimated finish time. Plan client deadlines around that.
- Can we call it from our own tooling?
- Yes. Business includes 100,000 API calls a month and Agency 300,000, then $1.00 per 1,000 on monthly billing. Docs are at /docs/api.
Related
Other kinds of agency
- Cold email agencies
- Lead generation agencies
- SDR and outsourced sales teams
- Recruiters and staffing agencies
- Marketing agencies managing client lists
- Deliverability consultants
- Data and list brokers
- Clay and GTM engineering agencies
- Appointment setting agencies
- Email marketing agencies
- Staffing agencies doing business development