Outbound lead generation services that don’t sound like everyone else.
Cold email and LinkedIn outreach for B2B companies. We build the list, write the copy and send it every day. The replies land in your inbox.
- We build the list.
- We write the copy.
- We send it every day.
- You approve it before it sends.
- The replies land in your inbox.
- You or your team take the conversation from there, in your own words.
organizations contacted
real replies (10.69% reply rate)
positive replies (5.15%)
first-page keyword rankings
YOY website traffic growth
more leads in 6 months
Client results across UnderdogOS
- The problem
Your buyers delete the same email every day.
Your best buyers aren’t searching for you today. They’re busy running their business. Most agencies only do inbound, then wait for the phone to ring. The ones that do outbound send the same lazy drip: “Hi {first name}, quick question.” Then a bump. Then a breakup. Your buyers get it daily in their inbox and on LinkedIn, and they delete it in a second.
Hi {first name}, quick question.
Then a bump.
Then a breakup.
They delete it in a second.
Inbound gets you found. Outbound gets you in the door. You need both.
- Cold Outreach
Cold outreach, done for you.
We write better, and our response rates prove it. LinkedIn is where it shows most.
Your list, built for you.
Real buyers who look like your best clients. No bought lists.
Cold email at scale.
5,000+ emails a month from multiple mailboxes, built to land in the inbox.
LinkedIn DMs that back it up.
A second touch to the same buyers, done with care so your name stays clean.
Copy that cuts through.
American copywriters write every message. You approve it before it sends.
- Inside UnderdogOS
Outbound works best inside a system.
B2B growth comes from doing three things at once. UnderdogOS runs all three for $1,995/month.
Cold Outreach.
Cold email and LinkedIn DMs to the buyers you want to win.
Website.
CRO, SEO and AEO. Your site turns visits into leads, ranks on Google and shows up in AI answers.
Thought Leadership.
Content on the platforms where your buyers already spend time.
Why not DIY
Outbound only works if it runs every day. Most teams start strong, get busy and stop. We’ve done it every day for years, and we keep up with what changes so you don’t have to.
- Proof
Real results. Real replies.
- Case study · Cold email · Youth sports software
108 real replies from 1,010 youth football organizations
A youth sports software company sells registration and management software to youth sports groups. We ran a cold email sequence to youth football organizations. Short emails. One clear ask.
Saleshandy data, January 12 to July 15, 2026. Real replies leave out out-of-office auto-replies. Positive means marked interested, meeting booked or closed. For context, the average real reply rate across every Underdog cold email sequence was 2.52%.
organizations contacted
real replies (10.69% reply rate)
positive replies (5.15%)
“Underdog Digital has been instrumental in helping us scale our marketing efforts. They’ve built effective cold email campaigns, improved our website, and created customized solutions tailored to our business.”
- UnderdogOS client · Google review
- Your options
Four ways to run outbound. One does it all.
| Do it yourself | In-house SDR | Generic agency | UnderdogOS | |
|---|---|---|---|---|
| Builds the list | You | Your hire | Varies | We do |
| Writes the copy | You | Your hire | Templates | American copywriters. You approve it. |
| Sends every day | When you have time | Your hire | Yes | Yes, 5,000+ emails a month |
| LinkedIn DMs | More work for you | If they know how | Sometimes | Included |
| Website and content | No | No | Usually not | Included |
| What you pay | Tools plus your time | Salary, benefits and management | A retainer | $1,995/month |
- How it starts
Three steps to your first campaign.
Get your free audit.
30 minutes. We score your site, your outreach and your content live, and name two or three specific gaps.
Get your plan.
You keep the written report whether you hire us or not. If it’s a fit, we lock in your best-fit clients, your list and your message.
Outreach goes live.
Your new mailboxes warm up for 2 to 4 weeks. Then sending starts.
- FAQ
Outbound lead generation questions, answered
By Matt Vaadi, Founder, Underdog Digital · Updated October 2026
What is outbound lead generation?
Outbound lead generation is when a business reaches out to buyers first, instead of waiting for them to find it. For B2B companies, that means cold email and LinkedIn messages sent to a list of decision-makers who look like your best clients.
Inbound gets you found. Outbound gets you in the door. UnderdogOS runs both.
Can't I just write cold emails with ChatGPT?
Everyone else already is, which is why inboxes are full of emails that sound the same and get ignored. AI writes what you tell it to. If you don’t know what makes a cold email get a reply, you can’t prompt for it. Deliverability, list building, testing and follow-up aren’t a prompt either. We use AI too, behind people who’ve sent a lot of cold email and know what works.
How much do outbound lead generation services cost?
At Underdog Digital, outbound lead generation is included in UnderdogOS for $1,995/month. That one price covers all three UnderdogOS pillars: Cold Outreach, your Website (CRO, SEO and AEO) and Thought Leadership content. You get one team and one plan instead of three vendors.
List building and copywriting are part of the service. See the full breakdown on our pricing page.
Does cold email still work in 2026?
Yes. Cold email still works in 2026 when the list is clean, the sending setup is solid and the copy sounds like a real person wrote it. What doesn’t work is the generic drip your buyers already delete every day.
For a youth sports software company, we contacted 1,010 organizations and got 108 real replies, a 10.69% reply rate. The average real reply rate across every Underdog cold email sequence was 2.52%.
Cold email vs. LinkedIn outreach: which works better for B2B?
For most B2B companies, the best answer is both. Cold email reaches more buyers at scale, and LinkedIn DMs give the same buyers a second, more personal touch in a place they already check. Used together, each channel makes the other one work harder.
We send 5,000+ cold emails a month and pair them with LinkedIn messages to the same list. We do it with care, so your reputation stays clean.
Should I hire an outbound agency or an in-house SDR?
Hire an agency if you want outbound running every day without adding headcount. An in-house SDR costs salary, benefits and management time, and still needs tools, a list and copy. A full-service agency brings the list, the sending setup and the writers.
Most teams start outbound strong, get busy and stop. We’ve done it every day for years, and we keep up as email and LinkedIn change their rules.
How many cold emails can I send per day without hurting my domain?
Keep each mailbox to about 20 to 30 cold emails a day, and spread your volume across multiple warmed mailboxes on separate sending domains. That way no single inbox sends too much, and your main domain stays out of cold outreach completely.
That’s how we send 5,000+ emails a month for clients without hurting their main domain.
How long does outbound lead generation take to get replies?
New inboxes take 2 to 4 weeks to warm up before sending starts. After that, replies can come in as soon as the first emails go out. How fast and how many depends on your market and your offer, so we never promise a set reply timeline.
We don’t skip warm-up to rush the first send, because warm-up protects your domain.
Do you book meetings for us?
No. Underdog Digital does not book meetings or set appointments. When a prospect replies to your cold email or LinkedIn message, the reply goes straight to you, so you or your team can take the conversation from there in your own words.
Our job is to keep the right buyers hearing from you every day.
Who writes the cold emails and LinkedIn messages?
American copywriters on the Underdog Digital team write every cold email and LinkedIn message. They write in your voice, keep each message short and give it one clear ask. It reads like it came from you, not a bot. You approve the copy before anything sends.
That’s how it cuts through the generic drip your buyers delete.
Who are outbound lead generation services for?
Outbound lead generation services fit B2B companies that sell to other businesses and want more of the right buyers to hear about them. That includes service firms, software companies and professional services teams that are tired of waiting on referrals and inbound alone.
It’s not a fit if you want a bought list blasted tomorrow with no warm-up. Run a payroll, PEO or HR firm? See our page on marketing for payroll companies.
- Your move
Your next client is not going to find you. Go find them.
Not ready to talk? Grade your website free. Rather call? (803) 310-2112.