Starter project
Can start at around $2,000 to $3,000
One useful result, such as company-level visitor identification, a fit score or a sync between your CRM and HubSpot.
For B2B SaaS founders, CEOs and sales leaders
A sales system your team can run and trust, in your HubSpot.
We build the system in your HubSpot: the process your sellers follow, data your team trusts, and an AI SDR that turns buying signals into conversations. Your team closes, and the system stays yours.
Show Sergey where your sales get stuck. Leave with a plan and one fixed price.
[Sergey Danishevskiy]
- CEO
- Selleris: 400+ CRM projects since 2017
- Founder
- Selleris Connect, a B2B SaaS
- Editor-in-chief
- Upcharted, on B2B SaaS from the first sale to $1M ARR
Every diagnostic starts with a call with me.
Which one is you?
What it costs
The Build is the one-time phase in which we build the system result by result: each result has a fixed price, and you pay for it after it is verified, with no upfront fee. After the Build, you choose whether to continue with Improve, a retainer: a fixed monthly fee agreed with you, for a named engineer instead of hiring a GTM engineer.
Is now the right time?
Right time if
- You have closed the first deals yourself and want your first seller to sell the next ones
- You just took over sales and need a system your team can trust
- Your sales team works, but the growth target is out of reach with the current system
- You pay an outside SDR agency and want outreach to run from your own HubSpot
Too early if
- You are still finding out who buys
- Nobody sells and there is no self-serve sign-up to convert
- You want us to sell for you
From a buying signal to a call with your team, in your HubSpot
The outreach part of the system is an AI SDR: software that does the research and outreach a sales development rep would do, built inside your HubSpot and working in your name.
All inside your HubSpot
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Signals
It watches for companies showing they may be ready to buy from you: a new hire, a funding round, repeat visits to your key pages.
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Qualify and score
It checks each company against your ideal customer and scores the timing.
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Outreach
The AI SDR runs the outreach you agreed, from your accounts, and follows up. Replies outside the rules go to a person.
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Call, demo or sign-up
Qualified prospects land on your team's calendar. Where buyers sign up on their own, it takes them to a demo, trial or subscription.
It runs in your HubSpot and your accounts, on rules you agree. Your team takes the calls and closes the deals.
Outside SDRs or a system you own
Outside SDRs book meetings from their own tools. The AI SDR we build is made to replace them, inside your HubSpot.
| SDR agency | Your system, built by Selleris | |
|---|---|---|
| Where outreach runs | The agency's tools and accounts | Your HubSpot and your accounts |
| What you pay for | Meetings or a monthly fee | Each agreed Build result, after it is verified; then, if you choose it, Improve: a fixed monthly fee agreed with you |
| Who closes | Your team | Your team |
| When the contract ends | Its tools and accounts stay with the agency | The system, data and playbook stay with you |
As of
From our research
What founders and sales leaders say
We read 375 accounts from founders and CEOs of B2B software companies and 1,091 records on how companies build or buy their sales system, in public interviews and posts. Every quote links to its source.
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The wall is the handoff
For founders who sell, growth stalls at the handoff, when someone else has to sell the way they do.
Basis: 375 founder and CEO accounts at 351 B2B software companies. Among the founder accounts, deciding whom to hire is the most frequent trigger (107 accounts), ahead of not enough pipeline (78) and a flat revenue line (29).
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[Mintlify] $1.5M ARR
“We were often dropping the ball, missing replies, and missing times to even respond to the deals.”
Han Wang
Co-founder and CEO, Mintlify
Source: Bain Capital Ventures, 2026
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[AirOps] $1.3M → $13M ARR
“Because you can do jazz as a founder in a way that you can't do when you have real sellers in.”
Alex Halliday
Co-founder and CEO, AirOps
Source: A Product Market Fit Show, 2026
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[MobileIron] 7 customers when the first sellers started
“Founders have that magic pixie dust and it's totally, totally not repeatable.”
Bob Tinker
Co-founder and CEO, MobileIron
Source: A Product Market Fit Show, 2026
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Most founders who take a side say the sale has to repeat before the scaling hire
116 of the 138 founder and CEO accounts that take a side say the sale has to repeat before the hire meant to scale it.
Basis: 116 of the 138 founder accounts that take a side on the order of things support building a repeatable sale before the hire meant to scale it. The cost founders name is time and runway more than salary.
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[Decagon] $1M ARR
“If founder sales are not going well, an AE is not going to solve that.”
Jesse Zhang
Co-founder and CEO, Decagon
Source: Bain Capital Ventures, 2026
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[Blings] $1M ARR
“Don't hire until you have a repeatable process, until you're able to make a playbook”
Yosef Peterseil
Co-founder and CEO, Blings
Source: The SaaS Podcast, 2026
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[Guideline] 10 plans: the first sellers' goal for the year
“I was like, ‘you guys sell 10 plans this year. I will take you to Mexico. We didn't sell 10 plans. Nobody went to Mexico.’”
Kevin Busque
Co-founder, Guideline
Source: First Round Review, 2026
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A new sales leader inherits a system nobody trusts
A new sales leader often inherits a system nobody trusts, and has to reset it.
Basis: A second round of 1,091 records on how founders build or buy their sales system, with podcast interviews, Hacker News threads and CRM reviews: rework of the sales system is common, comes after a change in who sells, and usually concerns the process or the sales model.
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[Legora] $3.5M → $200M ARR
“when I started we had very low, you know, very low adoption of like our CRM.”
Patrick Forquer
Chief revenue officer, Legora
Source: The GTMnow Podcast, 2026
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[InMobi] $300M annual revenue when she joined
“When I first joined, there were two people tinkering in Salesforce. No system administration experience whatsoever, full tinkering.”
Lauren Hughes
First revenue operations leader, InMobi
Source: RevOps Lab, 2025
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[PlanetScale] 75 people at the company
“I inherited a new instance of Salesforce and needed to understand like where things were and what was going on.”
Eric Portugal Welsh
Head of revenue operations, PlanetScale
Source: RevOps Lab, 2026
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- HubSpot
- Microsoft
HubSpot Solutions Partner (opens in a new tab), Microsoft partner (opens in a new tab), and The Swarm partner. 400+ CRM projects since 2017, directly and through implementation partners.
FAQs
Questions of founders and sales leaders
I am about to hire my first seller. When should we start?
Before the seller starts, or in their first three months: the system is built from your last deals, so it is ready when the seller needs it.
I just took over sales. Can you work with the system I inherited?
Yes. The diagnostic starts from what you have: we review your pipeline, data and recent deals, then agree which results to rebuild first, such as data, lifecycle stages and routing, each with a fixed price.
Our team already sells. Can you work with what we have?
Yes. The diagnostic starts from your growth target and the system you have today: we review your pipeline, data and recent deals, then agree which results to build first, each with a fixed price.
We use another CRM. Do we have to switch?
No. Your CRM stays: we connect it and sync its data with HubSpot, prove the approach on a slice, then build the system on HubSpot.
Do you find leads or sell for us?
No. We build the system in your HubSpot; the AI SDR works in your name on rules you agree, and your team closes the deals.
How much does it cost?
A starter project can start at around $2,000 to $3,000 for one useful result. Each Build result has a fixed price and is paid after it is verified, with no upfront fee; after the Build, Improve is your choice: a fixed monthly fee agreed with you. Full pricing is on the pricing page.
What is an AI SDR, and is Selleris one?
An AI SDR is software that does the work of a sales development representative (SDR): it researches accounts, writes and sends outreach, follows up and books conversations. Selleris is a GTM engineering agency, not an AI SDR subscription: we build an AI SDR inside your own HubSpot, connected to the rest of your system, and you own it. It starts by preparing work for review and acts on its own only in the scenarios you agree; replies outside the rules and exceptions go to your team. Where you sell on calls, your team closes the deal; where buyers sign up on their own, the system takes them to a demo, trial or subscription.
Show Sergey where your sales get stuck. Leave with a plan and one fixed price.
No fee for the diagnostic, and no obligation to buy.