Outbound vs inbound sales: what a 100% inbound company learns when growth stalls
Inbound sales is when buyers come to you: they find your website, content or referral and reach out. Outbound sales is when you go to them: you choose the companies and people you want and start the conversation yourself. Inbound brings warmer leads but you cannot control the volume or who arrives. Outbound gives you control over who you talk to and how many, but each lead starts colder. Most growing B2B companies end up needing both.
The more useful question is not which is better, but when an inbound-only company should add outbound, and what it costs. On September 4 I was on a call with exactly that company.
The definitions in two lines
- Inbound: the buyer starts the conversation. Content, search, referrals, word of mouth, partnerships.
- Outbound: you start the conversation. Cold email, calls, LinkedIn outreach, invitations to events or shows.
Neither is morally better. They are different ways of filling the same pipeline.
Why inbound plateaus
The company on our call sold employee-benefits software. It was growing more than 30% a year, entirely on inbound. Zero outbound. On paper, nothing was broken.
But inbound has a ceiling built in. You get the buyers who already know they have the problem and already know where to look. You do not get the ones who have not started looking, or the ones in segments where you have no reputation yet. Growth slows not because the product got worse, but because the pool of people who find you on their own is finite.
Their bigger growth lever was a channel: insurance brokers who act as gatekeepers for wellness vendor decisions. Brokers have their own incentives, so referrals from them were inconsistent. That is a classic inbound limit. You are waiting for someone else to send you business.
What outbound adds and what it costs
Outbound adds control. You choose the segment, the accounts and the people. You choose the volume. You can test a new market without waiting for it to find you.
What it costs is people and time. Someone has to build the list, write the messages, handle the replies, run the first calls and follow up. Done badly, outbound annoys people and damages your brand. Done well, it starts conversations you would never have had.
Charles, my partner, made a point on that call that matches what we see. Cold email alone had stopped working by around 2023. It works now when it is combined with something people want, like an invitation onto a podcast. The outbound that works today does not feel like outbound to the person receiving it.
Hire vs outsource, with the numbers
The company's instinct was that adding outbound meant hiring. So Charles laid out the trade, as we priced it on that call: running outbound plus pre-interviews outsourced would cost roughly $30K to $40K a year, against about $200K all-in for a new hire.
For context on the hiring side, the Bridge Group's 2025 research puts median SDR on-target earnings at $80K ($55K base, $25K variable), with 40% annual attrition. Salary is only part of a hire's cost. Add management, tools, ramp time, and the chance you are rehiring within a year or two.
That does not mean outsourcing always wins. The CEO raised a fair point: their product was complex, with more than a thousand health plans and over 20 major brokers involved. He worried an outside team could not handle a live demo of something that intricate. He was right to worry, which is why the realistic split was different.
The objection every buyer has about agencies
The CEO also said something I hear a lot: "we've gone through a lot of agencies that said a lot of things."
That objection is earned. Plenty of outbound vendors overpromise, book poor meetings and disappear. The only honest answer is to be specific about what you will and will not do, show how the funnel works step by step, and make your commitments about qualified conversations rather than vanity numbers.
Our funnel, as we walked him through it: an invitation goes out, an interested reply gets a link to self-qualify, a 15 minute pre-interview checks fit for the show and for the business, a 30 minute recording follows, then a follow-up, then a demo and close. The pre-interview does a lot of the sorting. Calls with people who do not qualify end in a few minutes. Calls with people who do can run to 45.
A hybrid model
The fit that made sense for that company was a hybrid, and I think it is the right default for most inbound-led companies adding outbound:
- The outside team owns lead generation and pre-interviews: the list, the invitations, the replies, the first qualifying conversation.
- The company's own people own demos and closing, because they know the product best.
- Inbound keeps running exactly as before.
- Partnerships, in their case brokers, can be approached the same way, by inviting them onto a show instead of pitching them a referral deal.
This keeps the expensive, product-heavy work in-house and moves the repetitive, volume-heavy work out. It also lets you test outbound for a quarter before deciding whether it deserves a hire.
How to test outbound without betting the company
If you are inbound-only, you do not need to make a permanent decision. Run a contained test:
- Pick one segment you want more of, ideally one inbound rarely brings you.
- Run outbound into it for a full quarter, so sending domains have time to warm and messages have time to improve.
- Keep your own team on the calls that need product depth.
- Measure qualified conversations and pipeline created, not emails sent.
- At the end of the quarter, compare the cost per qualified conversation with what inbound and a hire would cost.
If the numbers work, scale it or build it in-house with a playbook already proven. If they do not, you spent a quarter's budget to learn something you would otherwise have spent a hire to learn.
When should a company add outbound sales?
- When inbound growth is flattening and you have more capacity to sell than leads to work.
- When you want to enter a segment that does not know you yet.
- When your best customers are a small, known list of companies you could name today.
- When a channel partner is unreliable and you want a direct route to the same buyers.
If none of these are true and inbound is keeping your team busy, outbound can wait.
One more signal is worth watching: who your best customers are. If your strongest accounts all came through one or two lucky referrals, you are depending on luck. Outbound is how you go and find more customers like them on purpose, instead of waiting for the next lucky introduction.
Which is better?
For a company with a strong brand and steady demand, inbound is cheaper per deal. For a company that needs to choose its customers or grow faster than its reputation, outbound is the lever. The companies that grow steadily usually treat them as two halves of one pipeline: inbound for the buyers who come looking, outbound for the ones who do not know to look yet.
If you want to see what adding outbound would pay back in your own numbers, run your payback month.
Frequently asked questions
What is the difference between inbound and outbound sales?
Inbound is when the buyer starts the conversation, through content, search or referrals. Outbound is when you start it, by choosing the companies and people and reaching out first.
Which is better, inbound or outbound?
Neither on its own. Inbound is usually cheaper per deal; outbound gives control over who and how many. Most growing B2B companies need both.
When should a company add outbound sales?
When inbound growth flattens, when you want to enter a segment that does not know you, when your best customers are a short named list, or when a referral channel is unreliable.
How much does outbound sales cost?
On one call we priced outsourced outbound plus pre-interviews at roughly $30K to $40K a year against about $200K all-in for a new hire. The Bridge Group puts median SDR on-target earnings at $80K before other costs.