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We’ve been sellers, sales leaders, product managers, product marketing managers and founders — and we’ve exited. At OneSales, we turn that experience into AI-driven solutions that simplify sales and accelerate growth.
We’ve worked with over 2,000 go-to-market leaders — from CROs and RevOps to frontline managers and enablement teams.
We know the state of sales because we’ve lived it, not made it up as we go.
We understand technology, tools, and people. At OneSales, we design and implement solutions that are elegant, easy, fast, and cost-effective — built for adoption, not just aspiration.
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Seamus Devine is the Founder and CEO of OneSales. A veteran GTM sales leader with over 20 years of experience, he has helped scale global enterprise software companies including TIBCO, BEA Systems, and Software AG. Seamus co-founded ClosePlan, acquired by People.ai, where he later led multiple GTM segments. He has also founded several SaaS ventures, including FilesConnect. At OneSales, he’s focused on redefining how modern sales teams leverage AI to drive growth and efficiency.
Originally from San Francisco and based in Prague, Seamus is passionate about AI’s impact on GTM strategy and enjoys travel, running, and family time.
Ruslan is the Co-founder and CTO of OneSales. A seasoned AI engineer and product builder, he has led the development of advanced voice, data, and LLM-based systems across multiple industries. Prior to OneSales, he co-founded ScaleVoice and built AI-powered agents, pricing engines, and recommendation systems. At OneSales, he’s focused on creating AI infrastructure that powers the next generation of go-to-market teams.
Based in Prague for over a decade and originally from Ukraine, Ruslan is passionate about applying AI to complex business problems. Outside of work, hiking, travel, reading, and time with his dog.
