Thesis · Vendisys, San Francisco
Inbound waits.
Outbound goes.
Why a 24-year-old outbound company built its own infrastructure, then the agents that run on it, and ended up owning the other half of distribution.
Written by the Vendisys leadership team · 7 min read · Revised October 2026
Distribution has two halves.
Every B2B company has to solve the same problem twice. First it has to be findable: search, content, social, pricing pages, the whole surface a buyer touches when they already know they have a problem. Then it has to go and find the buyers who do not know yet, or who know and are talking to someone else.
The first half is inbound. The second half is outbound. They are not the same problem, they do not reward the same skills, and they are not solved by the same software. For the last decade almost all the capital, tooling and talent in go-to-market went to the first half.
We spent that decade on the second.
Inbound got solved, then crowded.
Inbound is now a well-engineered machine. There are agents that write the content, agents that get it cited by LLMs, agents that run pricing experiments and agents that attribute the revenue. Some of them are very good. We admire a few.
But a solved problem is a crowded one. When every company in a category can generate a hundred posts a week and rank for the same phrases, being findable stops being an advantage. The buyer who searches gets fifteen identical answers. Your share of that buyer is a lottery ticket, and the ticket price keeps rising.
The buyers who are not searching yet are a different market. Nobody is in their inbox. Nobody is on their calendar. Nobody noticed that they just connected with your competitor's account executive on LinkedIn. That is where pipeline is cheap, and it is cheap because reaching it is hard.
Outbound is an engineering problem.
Most people think of outbound as a people problem: hire SDRs, give them a sequencer, manage the activity. We ran it that way for 2,200 companies. It works, and it does not scale, because every part of it that breaks is a system, not a person.
Deliverability breaks because the mailboxes are rented and shared. LinkedIn breaks because the account is new or the pacing is wrong. Data breaks because validators throw away half the market as catch-all. Timing breaks because nobody knows when the buyer actually moved. Replies break because they land in nine places and get answered in two days.
Each of those failures is specific, repeatable, and fixable in software. So, one at a time, we fixed them. Inboxy and AIA for the channels we had to stop renting. Scrubby for data. CAM for timing. LIA, KALI and EMY for the touch itself. Underfive for the reply. None of them was a product plan. Each one was a wall our own programs hit, at a scale where the fix had to be infrastructure, not a workaround.
That is why Vendisys is an infrastructure company and not a tools company. We have operated outbound for 2,200 companies over 24 years, and everything that broke along the way is now a layer of the platform that does not.
Own the pipes.
Here is the belief that most separates us from the rest of the category. If you do not own the channel, you do not own the outcome.
Almost every outbound tool rents its channel. Email tools send through mailboxes you buy from Google or Microsoft. LinkedIn tools run on your own profile or on accounts that are days old. When the platform tightens a limit, the tool's customers lose the channel overnight, and the tool shrugs.
Inboxy exists so that the sending domains, the mailboxes, the warmup network and the rotation are infrastructure we control. AIA exists so that the LinkedIn identities doing the outreach are aged, verified and ours, not yours, and not three days old. Scrubby exists so that nothing is sent to an address that would damage either. This layer is not optional. No email or LinkedIn message leaves the engine without passing through it.
Owning the supply is expensive and unglamorous. It is also the only reason the engine keeps running when the rules change, and the rules always change.
Agents, not seats.
Software for outbound has always been priced and designed around the rep. A seat, a sequencer, a dashboard the rep looks at. The rep is the integration layer: they read the signal, pick the list, write the note, chase the reply.
We design around the hand-off instead. CAM does not show a rep a dashboard. It emits an event. Scrubby subscribes to it. KALI subscribes to Scrubby. Underfive subscribes to everything that can produce a reply. The human steps in to approve a draft or take a meeting, which are the two things humans are good at.
This is why we call it an engine rather than a suite. A suite is a set of tools that share a login. An engine is a set of parts that only make sense together, and that move on their own once you start them.
What we believe.
- The unsearched market is the cheap market. Pipeline is least expensive where nobody else is reaching.
- Timing beats personalization. A plain note the day after a competitor demo outperforms a beautiful one a month later. CAM comes first for a reason.
- Own what can be taken away. Mailboxes, identities, reputation. Rent nothing that a platform can switch off.
- Every hand-off is an event. If a human has to carry data between two steps, we have not finished building.
- Operate what you build. We run every agent on our own programs before a customer sees it, and we keep running it after.
- Count meetings, not activity. Sends, connections and opens are inputs. The only output is time on a calendar.
We have booked more than a hundred thousand of those meetings. The engine is how we intend to book the next million.
— Vendisys
156 2nd Street, San Francisco · Since 2002




