Bulutfon vs SESTEK

Bulutfon is a Turkish cloud phone system, often called a virtual PBX or bulut santral, built for small and mid-sized businesses in Turkey. Instead of buying and maintaining switchboard hardware in the office, companies get their phone numbers, call routing and reporting as a subscription service that works over the internet on desk phones, computers and mobile phones.

Businesses can use local geographic numbers and 0850 numbers, set up IVR menus that greet callers and route them to the right department, create call queues and ring groups, record calls, and receive voicemail by email. Employees answer calls from desktop and mobile softphone apps or IP desk phones, so remote and field teams stay on the same number. A web panel shows call reports, missed calls and agent performance, and integrations with CRM and help desk tools display caller details and log calls automatically, with an API for custom connections. Bulutfon operates under authorization from Turkey's telecom regulator (BTK) and is priced in Turkish lira per user or package.

Bulutfon fits Turkish SMBs, e-commerce companies, clinics, agencies and support teams that want a professional phone setup quickly and without hardware. Call recordings contain personal data, so businesses should handle them in line with KVKK. Local competitors such as Verimor and Netgsm offer similar cloud PBX services, while international VoIP tools like Aircall and Dialpad have richer integrations but weaker support for Turkish numbers, local billing and regulation.

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.