GTM Engineering Agency
A GTM engineering agency that builds your revenue system.
Selleris connects customer data, buying signals, AI agents and automation in HubSpot for B2B SaaS and tech-enabled SMBs. From finding new accounts to growing existing ones, your team works from one connected revenue system.
We start with the problem worth solving first, whether it calls for a focused project or Selleris Revenue Loop. We lead the design and implementation. You own the system. Your team runs it.
Free diagnostic with a focused proof of concept. No obligation to buy implementation.
The Agency
What a GTM engineering agency does
A GTM engineering agency makes your go-to-market strategy work in practice: which accounts to prioritize, what should trigger follow-up and how teams share information. Those decisions become connected data, workflows and reporting.
Selleris builds around HubSpot, using your existing data and tools as the starting point. Where needed, we add custom integrations and AI agents in your Azure tenant. The work, documentation and agreed results stay visible through our Glass Box approach.
The deliverable is a system you own, not activity you rent.
The full argument is in the GTM engineering manifesto.
One discipline, five doors.
Choose the service that fits your needs. We agree the scope, deliverables and commercial terms before work starts.
42
people in our engineering team
5+ years
average client relationship
100%
of licenses in your name, not ours
The Practice
Hiring a GTM engineer vs hiring us.
Hiring a GTM engineer adds in-house capacity. Selleris brings a team to design and implement the capabilities you need. You do not have to choose one or the other: we work with your existing team and document the system so a future hire can take it forward.
For Selleris Revenue Loop, the free diagnostic includes a focused proof of concept. You see the proposed results and one fixed total price for the initial implementation before committing. You pay after agreed results are achieved and verified, with no upfront Selleris delivery fees. Further improvements are agreed separately.
The Questions
The agency, answered straight.
The questions teams ask before they hire a GTM engineering agency. If yours is missing, bring it to the diagnostic call.
What is a GTM engineering agency?
A GTM engineering agency turns go-to-market decisions into working data, workflows, AI agents and reporting. At Selleris, we build around HubSpot to connect prospecting, sales, onboarding, retention and expansion.
We start with your existing data and tools. Your system and delivered assets stay under your control, with documentation your team can use.
Should we hire a GTM engineer or an agency?
The choice depends on whether you need ongoing in-house capacity, a team for a defined implementation, or both. You do not need to hire a GTM engineer before working with Selleris.
We work alongside your existing team and document the system so your people or a future hire can take it forward.
Compare building with Selleris and hiring in-house using a configurable 12-month engineering budget.
What is fractional GTM engineering?
Fractional GTM engineering gives you access to engineering expertise without a full-time hire.
Selleris Revenue Loop is delivered through agreed scopes and measurable results, rather than an automatic monthly staffing retainer. We build and improve the system; your team runs daily revenue operations.
What does a GTM engineering agency cost?
The cost depends on the service and agreed scope. For Selleris Revenue Loop, a focused project can start around $2,000 to $3,000; broader implementations can reach $50,000 or more. These are USD budget guides, not fixed packages.
After the diagnostic, you receive one fixed total price for the initial Build. Improve work is agreed separately. You pay after agreed results are achieved and verified, with no upfront Selleris delivery fees or automatic retainer.
Software, credits and cloud costs are disclosed separately and paid directly to providers, with zero Selleris markup. Standalone services have their own agreed commercial terms.
Where do we start?
Start with a free diagnostic and a focused proof of concept. We use your business context and agreed data to identify the priority constraint and recommend next steps. The diagnostic takes 10 calendar days from readiness of the agreed minimum data and access. There is no Selleris fee for the diagnostic or included proof of concept, and no obligation to buy implementation.
Build: If you proceed with Revenue Loop, we design, implement and launch the agreed capabilities in your environment, with documentation and training.
Improve: We support, calibrate and extend the system through separately agreed work as priorities evolve.
The Diagnostic
Bring your growth ambition. Leave with a clear next step.
We use your business context and agreed data to identify the priority constraint, develop a focused proof of concept and recommend your next steps.
10 calendar days from readiness of the agreed minimum data and access. No Selleris fee for the diagnostic or included proof of concept. No obligation to buy implementation.