Your SDR agency
You pay an SDR agency for meetings. The meetings do not turn into deals.
Outside SDRs book meetings from their own tools and lists. When the meetings do not convert, little of what you paid for stays with you: not the data, not the scripts, not what was learned.
Show Sergey what the agency booked. 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.
[GetDot] 10–30 new customers a month: the goal for one channel
“We tried an agency for outbound and it didn't work well enough, so we're bringing go-to-market in-house and want a builder to own it.”
Job posting for a founding GTM engineer
GetDot
Source: Y Combinator jobs, 2026
In short
If it is too early, Sergey will tell you on the call.
What you get
- Outreach built in your HubSpot, from your accounts, in your name
- It is yours from day one
What it costs
- A starter project can start at around $2,000 to $3,000
- Each result is paid after it is verified
Too early if
- You are still finding out who buys
What breaks
An agency is paid for meetings, not for deals, and it works from its own lists and tools. The meetings fill the calendar, few become pipeline, and when the contract ends the lists, scripts and lessons leave with the agency.
From our research
[Warmly]
$20K
closed-won from $40K spent on paid meetings
“We got dozens of people who responded and booked a meeting with us.”
Max Greenwald
Co-founder and CEO, Warmly
Source: Growth Unhinged, 2025
[N.Rich]
$5–10M ARR
2025, after the rebuild
150 offshore SDRs after the round
“took a lot of money and a lot of effort. You know, even if it's Philippines, it cost a lot.”
Markus Stahlberg
Co-founder and CEO, N.Rich
Source: The SaaS Podcast, 2025
[Uplane]
$1M ARR
about six months after launch
20 people
“We stopped working with, with outreach agencies that do bulk outreach.”
Julius Körfgen
Co-founder, Uplane
Source: The SaaS Podcast, 2026
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.
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
Where to start and what it costs
A starter project can start at around $2,000 to $3,000 for one useful result, and the Build grows from there. You pay for each result after we verify it together, with no upfront fee. After the Build, Improve is your choice: a fixed monthly fee agreed with you. Full prices and payment terms are on the pricing page.
FAQs
Questions about outside SDRs
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 what the agency booked. Leave with a plan and one fixed price.
No fee for the diagnostic, and no obligation to buy.