Insights

Strategic partnerships SESTEK has an active M&A history, most recently being acquired by Unifonic in 2022, and has ongoing partnerships with major players like ING Bank and Five9. This indicates openness to channel and ecosystem collaborations that can be leveraged to expand enterprise footprints through co-sell and integration opportunities.

Enterprise focus With 500+ enterprise clients across 20 countries and a robust in-house AI stack for SR and NLU, SESTEK provides scalable, high-accuracy conversational solutions suitable for large contact center transformations, presenting a strong case for upsell of Analytics and Biometrics to existing clients.

AI-led cost savings The Virtual Agent offers full automation of simple tasks, aiming to increase self-service and reduce live-agent costs. This creates a clear value proposition for procurement teams seeking ROI through automation, especially in mid-to-large call centers.

Data-driven insights SESTEK Analytics delivers end-to-end data capture and QA tooling to measure agent performance and customer experience. This opens cross-sell opportunities to customers needing enhanced performance management, quality assurance, and operational dashboards.

Biometrics-enabled security Biometrics capability that authenticates callers in real time across languages and accents enables security-focused use cases and reduces friction in customer verification, presenting upsell potential to financial services and regulated industries seeking stronger identity assurance.

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SESTEK Tech Stack

SESTEK uses 8 technology products and services including Qlik, Amazon Web Services, Microsoft SharePoint, and more. Explore SESTEK's tech stack below.

Media & News

SESTEK's Email Address Formats

SESTEK uses at least 4 email formats:
SESTEK Email FormatsExamplePercentage
First.Last@sestek.comJohn.Doe@sestek.com
96%
First.Middle@sestek.comJohn.Michael@sestek.com
1%
Last@sestek.comDoe@sestek.com
2%
Last.First@sestek.comDoe.John@sestek.com
1%

Frequently Asked Questions

What is SESTEK's official website and social media links?

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SESTEK's official website is sestek.com and has social profiles on LinkedIn.

How much revenue does SESTEK generate?

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As of October 2026, SESTEK's annual revenue is estimated to be $500M - $1B.

What is SESTEK's NAICS code?

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SESTEK's NAICS code is 5112 - Software Publishers.

How many employees does SESTEK have currently?

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As of October 2026, SESTEK has approximately 200 employees across 4 continents, including Asia, Europe and North America. Key team members include President: S. K., Head Of Pmo: A. A. and Founder & Ceo: L. A. Explore SESTEK's employee directory with LeadIQ.

What industry does SESTEK belong to?

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SESTEK operates in the Software Development industry.

What technology does SESTEK use?

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SESTEK's tech stack includes Qlik, Amazon Web Services, Microsoft SharePoint, Microsoft SQL Server, PostgreSQL, Figma, WP Engine and Cursor Code Editor.

What is SESTEK's email format?

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SESTEK's email format typically follows the pattern of First.Last@sestek.com. Find more SESTEK email formats with LeadIQ.

When was SESTEK founded?

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SESTEK was founded in 2000.
SESTEK logo

SESTEK

Software DevelopmentIstanbul, Turkey51-200 Employees

SESTEK is a mid-sized software development company based in Istanbul, Marmara Region, that has focused on AI-powered conversational automation for customer service since 2000. Its research and development team, consisting of more than 100 engineers, builds end-to-end conversational solutions designed to understand and respond to customer inquiries. The company serves more than 500 enterprise clients across about 20 countries, helping them digitize and streamline their customer service operations. 

SESTEK offers a product portfolio that includes a virtual agent for handling routine interactions, analytics for extracting insights from customer conversations, and a biometric-based caller verification capability. In 2022, SESTEK was acquired by Unifonic, a leading CPaaS provider, placing it within a broader communications platform ecosystem.

Section iconCompany Overview

Website
sestek.com
NAICS Code
5112 - Software Publishers
Founded
2000
Employees
51-200

Section iconFunding & Financials

  • $500M - $1B

    SESTEK's revenue is estimated to be in the range of $500M - $1B

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