Callby AI vs Retell AI Voice AI vs Sestek Voice AI

Kendi LLM'ini Getir (BYO-LLM)

“OpenAI, Azure OpenAI, Anthropic, Google Gemini, Cerebras, DeepSeek, Groq, Ollama, Perplexity and X.ai”

Kendi LLM'ini Getir (BYO-LLM)

“For conversational AI, latency is very important, so chaining of multiple LLM calls might not be favorable.”

Kendi LLM'ini Getir (BYO-LLM)

“Offers a variety of providers (OpenAI, Azure OpenAI, AWS Bedrock, Google Gemini, SESTEK)”

Lokal / Self-hosted Model

“OpenAI, Azure OpenAI, Anthropic, Google Gemini, Cerebras, DeepSeek, Groq, Ollama, Perplexity and X.ai”

Lokal / Self-hosted Model

“For conversational AI, latency is very important, so chaining of multiple LLM calls might not be favorable.”

Lokal / Self-hosted Model

“Advanced security technologies for both cloud and on-prem infrastructures”

Gecikme (Latency)

“With ~600ms latency, conversations stay smooth and fluent.”

Native Speech-to-Speech

Gürültü Dayanıklılığı

Gürültü Dayanıklılığı

“The gate makes speech onset more robust in noisy environments and helps prevent noise-triggered barge-in.”

Native Türkçe

Native Türkçe

“Every language your agent uses must be supported by both a voice (text-to-speech) provider and a speech recognition (ASR) provider.”

Native Türkçe

“English, French, Turkish, Latvian, Russian, Spanish, Dutch, German, Urdu, Arabic, and Italian.”

Yöresel Aksan Toleransı

Yöresel Aksan Toleransı

“Accent Coverage in a Single Model: Multiple accents of the same language can be handled within one model, reducing operational complexity and eliminating the need to manage separate accent-specific models.”

Görüşme İçi Dil Değiştirme

Görüşme İçi Dil Değiştirme

“SemiColon separated, list of languages for language detection service to treat as candidates. If left empty, all the known languages by the service will be evaluated. It is good practice to provide a list with only the possible languages if you have a limited target audience. This increases detection correctness. eg. tr-TR;en-US”

Özel Sözlük / Telaffuz

Özel Sözlük / Telaffuz

“SESTEK SR allows you to customize how specific words appear in transcription output - without retraining the language model. By providing a pronunciation list in your HTTP request, you can map recognized speech to your preferred text output. This is especially useful for foreign words, brand names, and domain-specific terminology that the base model may transcribe inconsistently.”

Söz Kesme (Interruption)

Söz Kesme (Interruption)

“Graceful handling of mid-conversation interruptions”

Söz Kesme (Interruption)

“Barge-In occurs when a the connected VAD node detects speech. If a Speech Started is received during a merge, the merge stops, and only the streaming audio source is outputted.”

DTMF (Tuşlama) Desteği

DTMF (Tuşlama) Desteği

“Telephony features like voicemail detection, call transfer, press digits (DTMF)”

Canlı Temsilciye Aktarım

“Şikayetleri alır, kaydeder, çözümlendirir ve doğru birime yönlendirir.”

Canlı Temsilciye Aktarım

“Add the Transfer Call tool to a Retell single or multi-prompt agent to route phone calls to human agents or other numbers”

Canlı Temsilciye Aktarım

“When a request requires human judgment or cannot be completed autonomously, the conversation is transferred to a live agent with full context and relevant system outputs.”

Outbound Arama / Kampanya

“Callby.ai, inbound ve outbound müşteri iletişimini doğal ses etkileşimleri ve aksiyon alabilen yapay zeka müşteri temsilcileriyle yönetir.”

Outbound Arama / Kampanya

“+$0.10/outbound call”

Outbound Arama / Kampanya

“Outbound calling for proactive customer engagement”

Telesekreter Algılama (AMD)

Telesekreter Algılama (AMD)

“Telephony features like voicemail detection, call transfer, press digits (DTMF)”

Bilgi Tabanı / RAG

Bilgi Tabanı / RAG

“If you have a large knowledge base, consider using RAG to filter out only the relevant information”

Bilgi Tabanı / RAG

“RAG-based knowledge access with support for structured and scanned documents”

Fonksiyon Çağırma / API Aksiyonları

Fonksiyon Çağırma / API Aksiyonları

“integrates seamlessly via function calling”

Fonksiyon Çağırma / API Aksiyonları

“No-code customization with the ability to add tools (e.g., HTTP Request, Action Flow) for easy API integration”

Otomatik Görüşme Özeti

“Callby automatically generates a call summary at the end of each interaction, compiling key information and helping agents save time.”

Otomatik Görüşme Özeti

“On-demand conversation summaries — generate concise summaries of completed conversations anytime for CRM logging, post-call review, or quality assurance.”

Duygu / Niyet Analizi

Duygu / Niyet Analizi

“Analyze conversation sentiment in real-time to understand customer satisfaction and emotional state”

Guardrail / Konu Sınırlama

Guardrail / Konu Sınırlama

“Comprehensive AI safety controls for both customer inputs and model outputs — detect prompt injection, enforce content moderation, mask PII, ensure brand compliance, and block harmful outputs.”

SIP Trunk Desteği

“Twilio, Telynx, 3CX, Avaya, Genesys, Cisco, Alotech, Tegsoft”

SIP Trunk Desteği

“Elastic SIP trunking is the recommended way to integrate with your telephony provider that supports elastic SIP trunking.”

SIP Trunk Desteği

“This deployment model enables customers to integrate their voice infrastructure with Sestek AI Agents (Cloud) by establishing a SIP trunk from their telephony platform to the Sestek Cloud SBC.”

BYOC (Kendi Operatörünü Getir)

BYOC (Kendi Operatörünü Getir)

“Integrate Retell voice agents with your own telephony provider using elastic SIP trunking or imported numbers from Twilio, Telnyx, and Vonage.”

BYOC (Kendi Operatörünü Getir)

“In this architecture, the customer's PBX, IP-PBX, Enterprise Session Border Controller (SBC), Unified Communications platform, or SIP gateway establishes a SIP trunk to a dedicated SBC hosted within the Sestek cloud.”

WebRTC / Tarayıcıdan Arama

Eşzamanlı Çağrı Kapasitesi

“20 Free Concurrent Calls”

WhatsApp

“WhatsApp, social media, and other messaging platforms”

WhatsApp

“Built on a hybrid NLP + LLM architecture, they combine the reliability of intent-driven systems with the flexibility of generative AI, deployed to voice, chat, SMS, WhatsApp, and other digital channels.”

Web Sesli Asistan Widget'ı

“Requests via website and mobile app”

Web Sesli Asistan Widget'ı

“Azure Web-Chat Plugin”

SMS / Metin Takibi

“$0.01/Msg”

SMS / Metin Takibi

“Built on a hybrid NLP + LLM architecture, they combine the reliability of intent-driven systems with the flexibility of generative AI, deployed to voice, chat, SMS, WhatsApp, and other digital channels.”

REST API

“Create a new agent”

REST API

“The following integration methods used to connect Knovvu Virtual Agent with telephony systems rely on the Knovvu VA Synchronized API, which enables bidirectional communication between the virtual agent and external telephony services.”

Webhook / Olay Akışı

“Workflow automation triggered after conversations — auto-update CRM, create tickets, send surveys, trigger webhooks, and execute post-call processing without manual intervention”

SDK Dilleri

“React Native Sestek Webchat Plugin”

Test / Sandbox Ortamı

“Built-in simulator lets you test both chat and IVR experiences directly in the design screen before deployment.”

No-Code Akış Tasarımcısı

“Conversation flow agents allow you to create multiple nodes to handle different scenarios in conversations.”

No-Code Akış Tasarımcısı

“Users simply describe the desired flow, and the virtual agent presents it automatically”

Hazır Senaryo Şablonları

“Virtual Agents come with pre-built and ready-to-go integrations for different industry verticals.”

Takvim Entegrasyonu (Randevu)

“Agents can take actions beyond generating responses, including updating records, initiating transactions, scheduling appointments, and triggering workflows in connected systems.”

KVKK Uyum Beyanı

“KVKK-compliant infrastructure”

KVKK Uyum Beyanı

“Sestek kişisel verileri KVKK ve ilgili ikincil mevzuatlarda öngörülen usul ve esaslara uygun olarak işlemektedir.”

GDPR Uyumu

GDPR Uyumu

“GDPR — compliant via AWS infrastructure with a GDPR-compliant Data Processing Addendum.”

GDPR Uyumu

“We emphasize compliance with data protection laws globally, tailoring our approach to each customer's location.”

ISO 27001

ISO 27001

“We ensure compliance with ISO 27001, establishing an efficient Information Management standard.”

SOC 2

“SOC 2 Type 1 and Type 2 — independently audited controls for security, availability, and confidentiality.”

SOC 2

“SESTEK holds ISO 27001, ISO 9001, and SOC2 Type 2 certifications and undergoes annual audits performed by accredited independent third-party auditors.”

PCI DSS

“PCI DSS Compliant”

PII Maskeleme

“Privacy and PII controls — choose what data is stored per agent (everything, exclude PII, or basic attributes only).”

PII Maskeleme

“Includes data masking (dynamic, static) before reaching the LLM, ensuring sensitive data protection”

Veri Saklama Kontrolü

“Data Retention Policy — set per-agent retention from 1 day up to 2 years for transcripts, recordings, and logs.”

Veri Saklama Kontrolü

“These values are configurable, defaults being 7 days and 250GB.”

SSO / SAML

“Enterprise Single Sign-On via OpenID Connect — integrate with Azure AD for seamless, secure access with existing corporate credentials.”

Rol Bazlı Erişim (RBAC)

“Active Directory integration via secure LDAP/LDAPS — centralized user provisioning, group-based access control, and compliance with enterprise identity governance policies.”

Ses Biyometrisi / Kimlik Doğrulama

“Customers are authenticated using a single voiceprint across all conversational channels, including live agents, IVR systems, chatbots, and mobile applications.”

Halka Açık Status Sayfası

“All Systems Operational”

Analitik Panosu

“Anlık verilerle müşteri taleplerini, çağrı performansını ve operasyonel süreçleri tek ekrandan takip edebilirsiniz.”

Analitik Panosu

“Sign up for a free account on the Retell dashboard, where you'll receive $10 of free usage.”

Analitik Panosu

“Application and business dashboards are defined by SESTEK per application.”

Çağrı Kaydı

Çağrı Kaydı

“Automated daily exports of conversation data and audio recordings — hourly generated reports and audio files with API access for on-demand retrieval.”

Canlı İzleme

Canlı İzleme

“Speech Analytics presents real-time sentiment analysis, real-time notifications to supervisors and real-time triggers for API actions.”

Otomatik Çağrı Kalite Skoru (Auto-QA)

“The Agentic Evaluation feature enables automated quality evaluations of agent conversations using an AI Agent Evaluator (AE) powered by large language model (LLM) capabilities.”

Otomasyon / Containment Oranı

“Self-service rate: It measures the percentage of sessions resolved without human agent intervention.”

Türkçe Destek

“Callby AI ile 30+ dilde, 7/24 hizmet sunun, müşteri memnuniyetini en üst seviyeye çıkarın.”

Türkçe Destek

“konuşma sentezi, konuşma tanıma, doğal dil işleme ve ses biyometrisi”