Guide
Cold Email Marketing Agency: Services, Pricing & the DIY Option
A cold email marketing agency runs outbound for you: lists, sending domains and mailboxes, sequences, replies and booked meetings. Here's what agencies do, how they charge, the red flags to watch for, and what the same program costs to run in-house.
Hire an agency
Retainer, per meeting or per lead
Get quotes · ask who owns the domains
Run it in-house
- Mailboxes46
- Domains16
- Mailboxes + domains$171/mo
- Sequencer (Instantly)$97/mo
Excludes data, verification and staff time. Assumptions below.
Services
What a cold email marketing agency does
Most full-service agencies run the same six-step loop. What you're paying for is the people and the infrastructure behind it.
Step 1
Target
Agree the ideal customer, roles and triggers.
Step 2
Lists
Build and verify prospect lists.
Step 3
Infrastructure
Sending domains, 3 mailboxes each, warmed up.
Step 4
Copy
Write sequences and test angles.
Step 5
Send
Run campaigns across many mailboxes.
Step 6
Meetings
Handle replies and book calls for you.
| Service | What it involves | Ask about |
|---|---|---|
| Targeting and strategy | Defining who to contact and why now | Whether you approve the target list |
| List building | Sourcing contacts from data tools, then verifying them | Where the data comes from and who keeps it |
| Infrastructure | Buying lookalike domains, creating mailboxes, SPF, DKIM, DMARC, warmup | Whose name the domains are registered in |
| Copywriting | Sequences, follow-ups and A/B tests | Whether you sign off before anything sends |
| Sending and monitoring | Daily limits, inbox rotation, deliverability checks | How many emails per mailbox per day |
| Reply handling | Sorting replies and booking meetings | How fast interested replies reach your team |
Some sell only part of this. A cold email outreach agency focused on copy may expect you to bring mailboxes; an infrastructure provider sets up domains and mailboxes but doesn't write or send. Writing it yourself? Start with the cold email guide.
Pricing
How a cold email lead generation agency charges
Few agencies publish prices, and quotes come in different shapes. Convert every quote to the same number before you compare: total cost per qualified meeting.
| Model | How it works | Clarify before signing |
|---|---|---|
| Monthly retainer | Fixed fee for a scope: lists, copy, sending, reporting | Volume, number of campaigns, minimum term |
| Pay per meeting | Fee for each booked call that meets agreed criteria | What counts as qualified; no-show policy |
| Pay per lead | Fee for each interested reply or qualified contact | Who decides whether a lead qualifies |
| Hybrid | Lower retainer plus a per-meeting fee | Both sets of terms, and which one caps cost |
| Setup fee | One-time charge for domains, mailboxes and warmup | Who owns them afterwards; billed at cost or marked up |
A pay-per-meeting deal sounds safest, but it shifts the agency's incentive toward meetings that are easy to book rather than ones that close. A retainer pays for activity whether or not it works. Hybrids split the difference. Whichever you choose, write the qualification criteria into the contract. The wider landscape, including data providers and appointment setters, is covered in lead generation services.
Hiring an agency doesn't hand off the legal risk
Vetting
Red flags when hiring a cold email outreach agency
Most bad agency experiences trace back to things you could have asked on the first call.
Red flags
- Guaranteed meetings or reply rates before they've seen your market.
- Plans to send from your main company domain.
- No straight answer on whose name the sending domains are registered in.
- Far more emails per mailbox per day than the ~30 we plan for, or a few mailboxes carrying all the volume.
- Weekly reports built on opens and sends instead of replies and meetings.
- Emails without an opt-out or postal address.
- A long minimum term with no pilot period.
Questions to ask
- How many mailboxes and domains will you use for our volume, and how many emails will each mailbox send a day?
- Are the domains registered in our name, and do we keep them and the mailboxes if we leave?
- Do we approve the target list and every sequence before launch?
- What exactly counts as a qualified meeting or lead?
- How do you verify lists, and what bounce rate do you stop at?
- Who replies to prospects, and how fast do interested replies reach us?
- What happens to the data, copy and reply history when the contract ends?
Agency vs in-house
What a cold email program costs to run yourself
You can't compare an agency quote with nothing. Here's the in-house stack, priced from Jetmail's plans and Instantly's published pricing, with every assumption shown.
Worked example: 30,000 cold emails a month
Mailboxes = 30,000 ÷ 22 days ÷ 30 per mailbox = 45.5 → 46
Domains = 46 ÷ 3 per domain = 15.3 → 16
Jetmail = Growth $99 (30 incl.) + 16 × $3.25 = $151/mo
Domains = 16 × $15/yr ÷ 12 = $20/mo
Sequencer = Instantly Hypergrowth = $97/mo
Total ≈ $268/mo, before data, verification and staff timeAssumptions: 30 cold emails per mailbox per day and 3 mailboxes per domain (Jetmail planning figures), 22 sending days a month, Jetmail standard mailboxes on the cheapest plan for the count, billed monthly, domains at $15 a year each, and Instantly on monthly billing (October 2026). Instantly's Hypergrowth plan allows 25,000 contacts, so at about 3 emails per contact it covers up to 75,000 emails a month.
In-house stack per month: mailboxes, domains and sequencer
Same assumptions as the worked example. Excludes data, verification and staff time.
| 10K emails / mo | $165 |
|---|---|
| 30K emails / mo | $268 |
| 60K emails / mo | $433 |
| Cold email agency | In-house | |
|---|---|---|
| What you pay | Agency fee (retainer, per meeting or per lead); get quotes | About $268/mo stack at 30K emails, plus data and someone's time |
| Who does the work | The agency: lists, copy, sending, replies | Your team |
| Time to first campaign | Fast if the agency already has warmed mailboxes | Day one with pre-warmed inboxes; 2–4 weeks with new ones |
| Domains and mailboxes | Often the agency's; ask | Yours |
| What you learn | Shared in reports, if at all | Stays with you: copy, lists, results |
| Best when | You need pipeline now and no one can run it | Outbound is a long-term channel |
Run outbound on infrastructure you own
Domains, Google and Microsoft mailboxes and DNS set up in about 5 minutes, connected to your sequencer in one click.
Infrastructure
The infrastructure a cold email program needs
Whether an agency runs it or you do, the sizing math is the same: mailboxes = monthly volume ÷ 22 ÷ 30, domains = mailboxes ÷ 3.
| Cold emails / month | Per sending day | Mailboxes | Domains |
|---|---|---|---|
| 5,000 | 227 | 8 | 3 |
| 10,000 | 455 | 16 | 6 |
| 20,000 | 909 | 31 | 11 |
| 30,000 | 1,364 | 46 | 16 |
| 60,000 | 2,727 | 91 | 31 |
| 100,000 | 4,545 | 152 | 51 |
Every one of those domains needs SPF, DKIM and DMARC, and every mailbox needs warming or a pre-warmed start. Google asks senders to keep the spam rate in Postmaster Tools under 0.1%, so the volume has to be spread, not pushed through a few inboxes. Choosing and naming domains is covered in cold email domains; picking the sending tool in the best cold email software.
Skip the setup, keep the ownership
For agencies
Running cold email for multiple clients
If you are the agency, infrastructure is a cost on every client and a risk to every client. Here's what Jetmail covers.
| Agency need | With Jetmail |
|---|---|
| Keep one client's reputation off another's | One workspace per domain, so each domain's reputation is isolated |
| Launch a new client this week | Pre-warmed Google and Microsoft mailboxes; Pro: $339 first month for 30, then $180/mo |
| Mailboxes at volume | Pro: $299/mo for 100 mailboxes, $3.00 each after; billed monthly |
| Set up profiles fast | Bulk profile customization |
| Read replies across clients | JetBox unified inbox for every mailbox |
| Automate provisioning | API access on Pro |
| Connect to the client's sequencer | 1-click OAuth to 50+ tools, including Instantly and Smartlead |
Jetmail labels its Pro plans "best for agencies with multiple clients". If you white-label your sending tool, Smartlead offers white-labeling at $29 a month per client (October 2026). Price the mailboxes for each client's volume with the calculator below.
Your volume
Price the infrastructure for your volume
Set a monthly cold email volume, for yourself or one client, to see mailboxes, domains and monthly cost on Jetmail and the main alternatives.
- Mailboxes
- 46
- Domains
- 16
- Jetmail / mo
- $151
30 sends per mailbox per day, 3 mailboxes per domain, 22 sending days. Monthly billing, mailboxes only (domains are extra with every provider). Competitor prices from their public sites, checked Oct 2026.
Monthly cost for 46 mailboxes
- Jetmail$151
- Zapmail$151
- InboxKit$138
- Icemail$115
- Instantly$230
- Zapmail prices shown are first-year prices; its help center says Google Workspace plans rise to $49/$149/$449 after 12 months.
- InboxKit pre-warmed shown at its cheapest tier (2–4 weeks warmed), excluding one-time domain transfer fees.
- Icemail standard price is a limited-time promo ($3.50 list).
- Instantly accounts also need a paid Instantly sending plan (from $47/mo), not included above.
Get this quote by email
We'll send the breakdown plus a domain and DNS plan for 30,000 emails a month.
Sources (checked October 2026): FTC: CAN-SPAM compliance guide · Google email sender guidelines · Instantly pricing · Smartlead pricing
Get a free outbound cost plan
Tell us where to send it. We'll reply with mailbox, domain and DNS recommendations for your sending volume — or start right away and have mailboxes live in minutes.
Where should we send it?
Or see pricing →Frequently asked questions
What does a cold email marketing agency do?
It runs outbound email for you: defines your target buyers, builds and verifies lists, sets up sending domains and mailboxes, writes and sends sequences, handles replies and books meetings for your sales team.
How much does a cold email agency cost?
Agencies charge a monthly retainer, a fee per booked meeting or lead, or a mix, often with a setup fee. Few publish prices, so ask for quotes in the same format and compare cost per qualified meeting. Running it yourself at 30,000 emails a month costs about $268 a month for mailboxes, domains and a sequencer on this page's assumptions, before data and staff time.
What are cold email services?
Any part of outbound email you pay someone else to do: list building, copywriting, infrastructure setup, sending and reply handling, or all of it as a managed program. Some providers sell one piece, such as infrastructure or copy; full-service agencies sell meetings.
Is a cold emailing agency worth it?
It can be when you need pipeline quickly and nobody on your team can run outbound. It's less worth it when outbound is a long-term channel, because you keep paying fees and may not keep the domains, data or what was learned when you leave.
Who owns the domains when a cold email agency sends for me?
It depends on the contract, so ask before you sign. If the agency registers the sending domains and mailboxes, you usually lose them, and their sending history, when you leave. Domains registered in your name stay yours.
Is cold email legal if an agency sends it for me?
In the US, cold email is allowed under CAN-SPAM if it follows the rules: accurate sender details, a non-deceptive subject, your postal address and a working opt-out honored within 10 business days. The FTC says you can't contract away that responsibility by hiring another company.
How many mailboxes does a cold email agency need?
Divide monthly volume by 22 sending days and about 30 emails per mailbox per day, then divide by 3 mailboxes per domain. 30,000 emails a month needs about 46 mailboxes on 16 domains, per client at that volume.