How to get your next 10 customers with multi-channel outbound
Cold email alone barely gets opened, and a single channel misses people who ignore it that week. The startups getting their next 10 customers reach each lead across email, LinkedIn and X in one coordinated sequence. Here is how multi-channel outbound works and how to run it.
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Most outbound advice stops at "build a lead list and send them a message." The part it skips is the part that actually gets you customers: doing it across more than one channel.
Here's the problem with a single channel. Send only cold email and a lot of people never open their inbox. Send only LinkedIn and a lot of people do not check LinkedIn that week. Each channel on its own misses a big chunk of the people who would have replied. The fix is to reach the same person in a few places, in order, so your name shows up again and again.
Every lead lives on more than one channel
The person you want to reach is usually findable in several places at once: a work email, a LinkedIn profile, an X account, sometimes a phone number, Instagram, or GitHub. Multi-channel outbound just means using more than one of those on the same person, on purpose.
It sounds obvious said out loud. It is also where most GTM motions leave results on the table.
Step 1: enrich your list across channels
Start with your lead list or target accounts, then find each person's presence on the channels you will use. That takes enrichment tools, and there are many: Apollo, People Data Labs, Hunter.io, and others.
The catch is that any one tool only covers part of the internet, so coverage is uneven. This is the exact reason I built PumpGTM: it combines the data from those sources so you get the highest-quality match for each person instead of gaps.
Step 2: run one coordinated sequence, not three separate ones
Once you know where each person is, start an outbound sequence that touches them across channels in a sensible order. Done right, the same person hears from you in a way that builds familiarity:
Day 1: an email.
Day 2: a LinkedIn connection request with a short note that references the email.
A few days later: a follow on X, and a like on a couple of their posts.
Each touch is light. Together they make the prospect see your name more than once and start to remember you. That repetition is what lifts the reply rate, and a reply is the start of every deal. It is the same cross-channel consistency behind how a $4B company runs its outbound.
The hard part is running it on one list without the channels drifting apart. That is exactly the LinkedIn + email on one list play, and if you drive your AI, you can copy the prompt that sets it up and runs it for you.
Why single-channel outbound underperforms
- Cold email only: many inboxes never get opened, so a good message dies unseen.
- LinkedIn only: plenty of buyers do not open LinkedIn in a given week.
- Multi-channel: the same person is reached where they actually are, more than once, so far fewer good-fit prospects slip through.
You do not need a huge stack to do this. Some people run it by hand with Claude, ChatGPT or browser tools. I wanted it at scale, so PumpGTM does the enrichment and the coordinated sequence in one place. Either way, the point is the same: for GTM from your first customers to your next ten, one channel is not enough.
Transcript
GTM 1 to 10 and getting your next 10 customers with multi-channel outbound. You've probably heard of making a lead list and sending them outbound. But one thing all of these tutorials miss is that your GTM motion can be much more effective if it's multi-channel. What this means is that every lead can be found on multiple channels. There's email, there's their phone number, there's LinkedIn, there's Twitter, there's Instagram, there's GitHub, and so much more. It sounds obvious, but isn't your outbound going to be much more effective if you're messaging them across these channels at the same time? The way this works is simple. First you get your lead list or accounts, then you use multiple tools to enrich all of this information and find data about them on different channels. Some of them are Apollo, People Data Labs, Hunter.io, and there are many more. I personally use PumpGTM.com because I made it combining the data from all of these tools so you get the best quality results. Number two: based on your lead list and where the highest percentage of people are, start an outbound sequence. Done correctly, you message them across multiple channels at the same time. For example, they get an email on day one. On day two, they get a LinkedIn connection request with a small message reminding them of your email. Some days later, they get a follow request on Twitter and you also like some of their posts. This multi-step, multi-channel engagement makes your prospect see your name and remember you again and again, which increases the chances of a conversation, which increases the chances of the sale. There are many ways to do this. A lot of my friends do it using Claude, Codex or ChatGPT browser use. I wanted to do it at scale, so I built PumpGTM.com. The point is, whenever you're trying to get the sale, you have to do it the best possible way. Just doing cold email is not enough; a lot of the time people don't open their inbox. Just doing a single channel like LinkedIn is not enough; often people don't open their LinkedIn. That's why a multi-channel approach is the way to go, and the world's top startups do it as well. Now it's your turn. Go get that pump.
Questions founders ask
What is multi-channel outbound? Reaching the same prospect across more than one channel, like email, LinkedIn and X, in a coordinated sequence, instead of relying on a single channel that many people will miss.
Why isn't cold email enough on its own? A large share of inboxes never get opened, so even a great email goes unseen. Adding LinkedIn and X gives the same person more than one chance to notice you.
How do I find a lead on multiple channels? With enrichment tools like Apollo, People Data Labs and Hunter.io. Each covers part of the web, so coverage is uneven. PumpGTM combines those sources to get the best match per person.
What does a multi-channel sequence look like? A light touch in order: an email on day one, a LinkedIn connection request that references it on day two, then an X follow and a couple of post likes a few days later.
Do I need a big tool stack? No. You can run it by hand with an AI like Claude or ChatGPT, or use PumpGTM to do the enrichment and the coordinated sequence in one place. Start at pumpgtm.com.
Original source · 2026-09-27 · Adapted and expanded for PumpGTM

Namanyay Goel · Founder, PumpGTM
Founder of PumpGTM (YC). Writes about founder-led GTM, LinkedIn outbound, and the systems behind it.



