Cold calling versus cold email for manufacturers, contact by contact
Dylan Breheny · Published October 23, 2026 · Reviewed October 26, 2026 · 5 minute read
For: owners and sales leads at manufacturers deciding how to split outbound time and budget between cold calls and cold email.
Most owners pick one channel and judge it on reply rate. On our programs the salesperson calls the contacts most likely to answer, emails the rest, and sends an email after each call that earns one. The split below comes from our own campaigns and from the rules our outbound advisor sets.
Is cold calling or cold email better for reaching manufacturing buyers?
Cold calling is the better channel for the manufacturing buyers you most want to reach, and cold email is the better channel for the larger group your salesperson can't reach by phone. Most owners frame the choice as one channel or the other. We run both on our programs and give each one a different slice of the list.
Our salespeople work the phone first. Emails go out under the client's own domain, as follow-ups and as the sole touch for contacts we decide not to call. We base the split on a rule our outbound advisor set, and on what each channel returned in our own campaigns.
Your cold email has to follow federal law even when every recipient is a business. The Federal Trade Commission's CAN-SPAM compliance guide for business (opens in a new tab) says the law makes no exception for business-to-business email: each message carries a valid postal address and a clear way to opt out, and you have 10 business days to honor an opt-out. A call to a plant falls under a different rule, which our note on two rebuttals on a cold call covers.
Which contacts should a manufacturer call, and which should it email?
A manufacturer should call the contacts its data scores as most likely to answer and to be the right buyer, and should reach everyone scored below that by email or LinkedIn. Our data tools grade each contact from P1, the strongest, down to P4. Our advisor's rule: call a P1 every day for seven days before marking the contact dead, call a P2 every two to three days, and leave P3 and P4 contacts off the dial list.
The advisor's reason is caller time: a salesperson who dials low-scored contacts burns hours and works through the list too fast. On one list we built this year, 357 of about 1,600 contacts scored P1, or 22 percent. Under the rule, those 357 took a call a day for a week, P2 contacts took a call every few days, and the bottom two tiers belonged to email. Our note on outbound lead generation for a contract manufacturer, Monday to Friday shows who the salesperson calls first on day one.
| Question | Cold calling | Cold email |
|---|---|---|
| Contacts it suits | P1 and P2: likely to answer, likely the buyer | P3 and P4, plus follow-ups after a call |
| Daily volume | Up to 200 dials a day per salesperson | About 19,000 emails in one of our campaigns |
| Setup | Carrier-checked numbers; 20 numbers per salesperson, checked daily for spam flags | Domains to warm up and keep out of spam folders |
| What a no tells you | A spoken reason: no need, timing, an incumbent, a contract date | Silence, in most cases |
| Wins when | Your buyers are a defined group of plant and purchasing titles and each account matters | Your list runs to tens of thousands and a single account is worth less |
What reply rate does cold email produce?
Our own cold email for new clients drew a 1.6 percent reply rate in July 2026 and 0.5 percent on the next campaign, so you should plan for replies in the low single digits and judge the campaign on meetings booked. We sent about 19,000 emails in the July campaign. The next used the same targeting with better domains.
We did better per reply on the second campaign. In July about four in ten replies turned into a booked call; on the later campaign two in three did. Our advisor's read was to track two numbers far apart in the funnel, emails sent and new clients, and to look at reply rate when those two move the wrong way.
What does a cold call give a manufacturer that a cold email can't?
A cold call gives a manufacturer a spoken answer the same day, and the salesperson can log the reason behind a no along with the yes. Our director, Grant, describes a typical stretch of about 150 calls this way: about 135 hard nos, 10 to 12 contacts with soft interest who ask for an email, and one or two meetings booked.
Your salesperson hears things in those 135 nos that an unanswered email can't tell you. A buyer names a supplier, or a month the contract ends. Our note on the five answers manufacturing buyers give a cold call sorts those responses and says what to log for each.
What should a salesperson do with "send me an email"?
A salesperson who hears "send me an email" after a real conversation should send a short, specific email that day and log the contact as soft interest with a callback date. Our team counts those contacts as warm and keeps them out of the meetings count until the buyer agrees to a time.
The same words inside the first 30 seconds mean something else: the buyer wants off the phone. Our guide to the first 30 seconds of a machine shop cold call gives the one answer our salespeople try before letting the call go.
Should a manufacturer run cold calling and cold email together?
A manufacturer should run cold calling and cold email together, with calls on the top-scored contacts and email on the rest and after each booked meeting. A Canadian manufacturer that sources parts from China and India told our director its prospecting was email only, at low volume, sent when someone had time, because the team had no reliable phone numbers.
Your team should also use email to protect the meetings the calls book. Our advisor calls the same-day intro email the single best tool for show rate. Your salesperson or account lead sends it the day your team books the meeting, with three agenda points taken from the call and one line at the end: "If you could hit accept on the calendar invite, that'll be great. If not, we'll give you a quick call to make sure you got it."
Which option fits which manufacturer?
Email alone fits a manufacturer with a large, low-value list, and a calling program fits one with a defined set of plant and purchasing buyers where one account changes the year. Grant names three cases where calling struggles: a market under about 50 target companies, a product that has to displace technology the buyer has already built around, and an offer the buyer sees as nice to have.
Under 50 targets, call them yourself and write each email by hand. Above that, our hire or outsource comparison sets an in-house caller next to a dedicated outsourced salesperson. Foreign manufacturers selling into the US and Canada can skip the domain warm-up for now, as our North American market entry page explains, and start on the phone.
Three questions to take to your own call data
- Of the contacts your team dialed last month, what share would your data provider score in its top tier?
- On your last email campaign, how many replies became a booked meeting, and how does that compare with the reply rate you reported?
- After each meeting your team booked, did the buyer receive an intro email that same day?
Send us your target list. We'll tell you which contacts to call and which to email.
Tell us what you sell and who buys it. If cold calling fits your market, our salespeople are dialing under your brand inside two weeks. If it doesn't, we'll tell you that on the call.
No pitch deck. No pressure. A 30-minute conversation with Grant, our director, about whether cold calling for manufacturers makes sense for your business.