Built for teams running many lists

Email Verification for Agencies & Marketing Teams

You inherit the list, and the bounce rate that comes with it.

Every new client arrives with a list somebody else built, of unknown age and unknown quality. The first campaign you send is the one that gets judged. Verifying on day one turns an inherited risk into a reportable win.

Start with 100 free credits View pricing

10M+ verifications · 99.5% accuracy · 4.9/5 rated · No credit card required

ClearBounce mascot in front of three client dashboards, each showing a list health breakdown of deliverable, risky and undeliverable addresses

What we found in 807,203 verifications · H1 2026

75.9%

Deliverable

10.2%

Invalid

8.7%

Risky

8.1%

Catch-all

80% of the lists we processed were at least 20% unusable. See the full benchmark data

Why agencies verify before the first campaign ships

When you send on behalf of other people, list quality is not an internal detail. It is the number in the report with your logo on it.

Never send blind on a new account

Verify the inherited list before the first campaign, so the bounce rate in your first report reflects your work and not your predecessor's.

Turn cleanup into a deliverable

A verification report is something a client can see and understand: how many addresses were dead, how many were risky, and what you removed.

One account, many client lists

Run every client through the same pool of credits instead of maintaining a separate subscription for each one.

Protect your own sending reputation

If you send from shared infrastructure, one client's bad list becomes every client's deliverability problem. Verification contains it.

Credits that survive between retainers

Credits never expire, so an unused balance from a finished project carries straight into the next one.

Earn on the referral instead of reselling

Our partner programme pays 50% recurring commission, so recommending verification can be a revenue line rather than a cost you absorb.

Automate it across every client account

Instead of running manual uploads client by client, wire verification into the intake process. New leads from any client form get checked the moment they arrive, and the list stays clean without anyone remembering to clean it.

One API key covers every client you manage

Connect through Zapier, Make or n8n when a client uses a platform you do not control

Batch endpoint for bulk jobs, single endpoint for form-level checks

Read the API documentation

cURL

# Verify a lead the moment it arrives from any client form
curl -s "https://clearbounce.net/api/v1/verify?email=$LEAD" \
     -H "X-API-Key: $CB_KEY"

# {
#   "email":         "lead@example.com",
#   "result":        "deliverable",
#   "is_disposable": false,
#   "is_role":       false,
#   "is_free":       true
# }

Three client folders feeding into a single audit panel with a list health breakdown

Audit an inherited list in an afternoon

Upload the export you were handed on day one. You will know within the hour whether you have been given a healthy list or a liability, and you will have the numbers to show the client either way.

Connect the client's Mailchimp, Klaviyo or ActiveCampaign account directly

Every address labelled deliverable, undeliverable, risky or catch-all

Export the results as CSV and drop them straight into your client report

The moments every agency recognises

If any of these sound familiar, the list is usually the cause rather than the creative.

You just took over an account

The previous agency's list quality becomes your bounce rate the moment you press send. Verify before that first campaign, not after it underperforms.

A client's open rates are falling and nobody knows why

Steady decline across every campaign points at list decay rather than subject lines. Verification tells you which one you are dealing with.

You are migrating a client to a new ESP

Platform migrations are the single best moment to verify, because a clean import protects the new sending domain from the start.

A client hands you a list from a trade show or purchase

Acquired lists carry spam traps that can get a domain blocklisted on the first send. Verify it before it ever reaches the ESP.

Your reporting needs a number you can defend

Verification turns "we cleaned the list" into a figure the client can see, which makes the retainer easier to justify.

One client is threatening everyone's deliverability

On shared infrastructure, a single dirty list drags down every account you send from. Finding it early keeps the rest safe.

Works with the tools you already send from

Connect your platform and verify the list where it already lives, or use the API and skip the export entirely.

See all integrations

Pay for what you verify, keep what you do not use

Verification demand is rarely flat. It spikes when you migrate, when a season starts, when a list arrives. Pricing that assumes a steady monthly volume charges you for the quiet months too.

Credits never expire. Buy for the spike, use the balance whenever it comes up next.

From $4 per 1,000 emails pay-as-you-go, or save 20% on a subscription if your volume is predictable.

100 free credits on signup, no credit card required.

Start free

100 credits

Enough to verify a real sample of your list and see the result breakdown before you spend anything.

Create a free account Compare all plans

Questions agencies teams ask

Can I manage multiple client lists from one account?

Yes. Credits sit in a single balance and can be spent across as many client lists and connected platforms as you need, rather than requiring a separate plan per client.

Can I resell verification to my clients?

Many agencies bill it as part of a cleanup or onboarding package. We also run a partner programme paying 50% recurring commission if you would rather refer clients directly.

What can I actually show a client afterwards?

Every job produces a downloadable breakdown: how many addresses were deliverable, undeliverable, risky or catch-all. That table drops straight into a client report without editing.

Do credits expire if a project pauses?

No. Credits never expire, so a balance bought for one client carries over to the next engagement.

What if my client uses a platform you do not integrate with?

Alongside the direct integrations there is a REST API plus Zapier, Make and n8n connectors, which covers virtually any platform that can send a webhook.

Related reading: Comparing email verification tools How email verification actually works

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