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SESTEK

Voice-first conversational AI and speech analytics for contact centers

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SESTEK is a chatbots & AI agents tool for Enterprise, offered as paid. Based in Turkey, founded in 2000. Popular alternatives include Vaani AI, Fin by Intercom, Sierra.

About SESTEK

SESTEK is a conversational AI and speech technology company founded in Istanbul in 2000 by Levent Arslan, a former Boğaziçi University professor. Since October 2022 it has been part of Unifonic, the Saudi customer engagement platform. SESTEK builds AI for contact centers: virtual agents that answer calls and chats, in-house speech recognition and text to speech, and analytics that transcribe and score every customer conversation. Much of the suite has been sold under the Knovvu brand.

The product line covers AI agents (the Knovvu Virtual Agent gained LLM-based agentic capabilities in April 2025), Agent Assist and Agent Copilot for live guidance to human agents, a Virtual Translator, conversational analytics, automated quality management (AQM) and coaching. The same codebase runs in the public cloud, hybrid or fully on-premise. There are no public plans: every deal is an enterprise project with a custom quote.

SESTEK fits large contact centers in banking, telecom and energy, especially where Turkish or Arabic speech accuracy and on-prem hosting matter. It is not a self-serve chatbot for small sites. Yellow.ai is broader on omnichannel chat, Ada is a cloud-only service automation product for digital brands, and CBOT is the closest local rival in Turkish banking; SESTEK is stronger on voice and speech analytics than all three.

Recent proof point: Arçelik put Knovvu Agentic AI live in its Turkish call center in January 2026, and SESTEK's case study reports 70% of cases resolved without a human agent. Buying tip: run a pilot on your own recorded calls first.

Key features of SESTEK

  • AI voice and chat agents that resolve requests end to end
  • In-house speech recognition and text to speech engines
  • Agent Assist and Agent Copilot with live guidance during calls
  • Conversational analytics with emotion detection and keyword spotting
  • Automated quality management that scores 100% of interactions
  • Coaching module tied to quality scores for each agent
  • Virtual Translator for multilingual customer conversations
  • Cloud, hybrid or fully on-premise deployment from one codebase

Pros and cons

Pros

  • Strong speech recognition for Turkish and regional dialects
  • On-premise option suits banks and regulated industries
  • Covers bots, agent assist and analytics in one vendor
  • Published agentic AI results at Arçelik and Zorlu Enerji
  • Knovvu Analytics averages 4.8/5 on Gartner Peer Insights

Cons

  • No public pricing, free tier or self-serve trial
  • Enterprise project timelines rather than quick setup
  • Product naming shifted between Knovvu and SESTEK branding
  • Overkill for small teams that only need a website chatbot

SESTEK pricing

SESTEK uses a paid model.

PlanPriceIncludes
EnterpriseCustomProject-based quote; cloud, hybrid or on-prem deployment

Source: www.sestek.com · checked on Oct 20, 2026

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How SESTEK compares in Chatbots & AI agents

Rank by votes
#1 / 24

0 votes from members

Starting price
—

Category median is $40/mo

Free alternatives
0

Free or open-source tools in Chatbots & AI agents

SESTEK ranks #1 of 24 chatbots & ai agents tools by community votes and is not directly comparable on price.

Common use cases

  1. 1Voice bots that handle balance checks and card requests in banks
  2. 2Call deflection for service and repair lines at appliance makers
  3. 3Scoring every call for compliance in a regulated contact center
  4. 4Real-time agent guidance during complex customer calls
  5. 5Speech analytics to find churn signals in telecom calls

Best for

Large contact centers that need accurate voice AI and speech analytics, with the option to host everything on-premise.

Not ideal for

Small businesses wanting a quick self-serve chat widget (Tidio, Intercom, Ada).

Integrations

  • Genesys Cloud (AppFoundry)
  • Avaya
  • Five9
  • REST API

Our take

SESTEK is one of the strongest choices for voice-heavy contact centers in Turkey and the Middle East, especially when data must stay on-premise. Shortlist it next to CBOT and Yellow.ai, and insist on a pilot using your own call recordings.

FAQ

What is SESTEK?
SESTEK is a Chatbots & AI agents tool: Voice-first conversational AI and speech analytics for contact centers.
How much does SESTEK cost?
SESTEK uses a paid model with no public price list and no free trial; contact SESTEK for a custom quote.
What are the best alternatives to SESTEK?
Community-listed alternatives to SESTEK include Vaani AI, Fin by Intercom, Sierra, Yellow.ai.
What does SESTEK integrate with?
SESTEK integrates with Genesys Cloud (AppFoundry), Avaya, Five9, REST API and more.
Which platforms does SESTEK support?
SESTEK is available on web.
Who is SESTEK for?
Large contact centers that need accurate voice AI and speech analytics, with the option to host everything on-premise.

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