How Many Client Lists Fit in 750,000 Email Checks a Month? An Agency Capacity Worksheet
Agency includes 750,000 checks a month, which covers about 150 clients at 5,000 checks each, or 30 clients at 25,000, before you count re-checks. Capacity is simple arithmetic: addresses touched per client per month, times passes per address, summed across clients. This post gives the worksheet so you can size your own book instead of guessing.
The numbers below are illustrations, not benchmarks. Replace them with your clients' real list sizes.
The formula
Checks per client per month = addresses touched x passes per address.
- Addresses touched is the new leads you load for that client, plus any older leads you re-verify.
- Passes per address is how many times each one is checked in the month. Verify once on upload and it is 1. Verify on upload and again before a follow-up wave and it is 2.
Add up every client and compare the total to the plan.
A worked table
| Client type | New addresses a month | Passes | Checks a month |
|---|---|---|---|
| Small outbound client | 3,000 | 1 | 3,000 |
| Mid-size client, weekly lists | 12,000 | 1 | 12,000 |
| Large client, re-verify before follow-ups | 20,000 | 2 | 40,000 |
If you ran 10 of the small, 8 of the mid-size and 3 of the large, that is 30,000 + 96,000 + 120,000 = 246,000 checks, about a third of 750,000. These are example figures, chosen to show the method.
What eats volume without you noticing
- Re-checks. Old leads that you re-verify before a new wave. See re-verifying leads older than 30 days for when that is worth it.
- Duplicates across lists. The same address in two files is checked twice. Remove duplicates first; merging lead lists without duplicates shows how.
- Unclean files. Blank rows and cells holding two addresses waste checks. See cleaning CSV columns before import.
- Test runs. A sample before the real file is one more pass for those rows. Cheap, but count it.
When Agency is the right plan, and when it is not
The plan is about people and separation as much as volume. The same mailbox check runs on every plan. What the tiers add:
| Plan | Price | Seats | What it adds |
|---|---|---|---|
| Pro | $39 a month | 1 | The check itself; first 100,000 checks a month at full speed, then slower, never cut off |
| Business | $99 a month | 5 | Shared access, priority lane, more API calls |
| Agency | $249 a month | 15 | 750,000 checks a month, client workspaces, branded client reports, per-client usage by month |
If one person runs all the lists and clients do not need a report, Pro is usually enough. The comparison in Pro, Business or Agency goes through the cases, and the agency list workflow shows how to run clients through it.
Tracking it during the month
Check usage mid-month, not on the last day. If you are tracking close to the limit, the cheapest fixes come first: de-duplicate, drop re-checks on lists you are not sending this month, and verify just before each send rather than on upload.
Try it on one client list
New accounts get 100 free checks with no card, enough to see how a real client list splits into valid, risky and invalid. Start on the verify page, or compare plans on pricing.
Common questions
How many checks does the Agency plan include?
750,000 checks a month, at $249 a month. It also adds 15 seats, client workspaces, branded client reports and per-client usage by month.
Does a re-check use another check?
Yes. Every address you run through the verifier is a check, whether it is new or one you verified last month. Plan for re-checks, not only new leads.
How do I estimate checks per client?
Multiply the number of addresses the client's campaigns touch in a month by the number of times you check each one. A new list is one pass. A list you re-verify before every send is a pass per send.
Can I see usage by client?
On the Agency plan, per-client usage by month shows lists, rows checked, valid, risky and invalid for each client workspace.
What if I only run a few clients?
Pro at $39 a month, with the first 100,000 checks a month at full speed, then slower, never cut off, is often enough for a small agency. See the Pro, Business or Agency comparison.
Check your list before you send
Real mailbox checks over SMTP, and nothing is sent to the address. Sign in with Google and your first 100 email checks are free, no card. Plans for bigger lists are on the pricing page.