Reach and qualify homeowners fast, then book on-site consultations automatically.
Lead
Qualification
+12% Conversion
24/7 Receptionist
+53% reachability
Appointment
Booking
+33% Booking rate
Reactivation
Recovered revenue: +$120k
Warm
Transfer
Time to first call: <10 sec
Customer
Support
+21% first resolution rate
Automating call operations for
Synthflow is a good fit for tech-savvy teams and small agencies that value flexibility and white-label options. telli is designed for companies looking to drive outcomes in sales-related and outbound use cases. With stronger voice quality, higher concurrency, dual LLMs running in parallel, and features like iOS call screening, telli is a better match for teams that prioritize reliability, call quality, and consistent outbound performance over customization.
Outbound-first
Run outbound and sales-led campaigns with infrastructure and features designed specifically for those workflows. telli includes outbound-focused capabilities like iOS call screening and infrastructure optimized for consistent performance, rather than broad customization or white-labeling.
Better Caller Experiences
Deliver clearer, more natural interactions on every call. telli focuses on voice quality, tone, and response reliability so outbound conversations feel consistent and human, not robotic or awkward.
Built to Scale
Scale outbound calling without worrying about performance limits. telli is built to handle higher concurrency so call quality and agent behavior stay consistent as volume grows.
Why telli?
This is why our customers choose telli
They run outbound and sale-led campaigns and need infrastructure built specifically for those workflows
They want consistently high call quality without troubleshooting voice or conversation issues
They need higher default concurrency to scale calling volume without added complexity
They don’t need white-labeling and instead want a platform optimized for performance, quality, and speed
Voice Agents & Conversations
3rd-Gen Voice Agents
Best LLMs & Intelligence
User Experience (Agent Builder)
AI Prompt Assistant
Custom / Cloned Voices
Multilingual Agents
Latency (Response Speed)
Calling & Telephony
Custom Telephony (BYO SIP)
Branded Calls
Warm Transfers
Limited Hour Transfers
Call Screening Navigation (iOS)
Voicemail Detection
Leaving Voicemail Messages
Timezone-Aware Global Calling
Workflow Automation
Integrated Auto-Dialer
Batch / Campaign Calling
Native "Call Me Later" Workflows
Recognized Callbacks
Native Calendar Integrations
Intelligence, Analytics & Data
Integrated Phone Number Management
Pickup & Answer Rate Analytics
Post-Call Analysis
Call Summaries
Conversation Replay & Transcripts
Contact Database (Native or Synced)
Platform, Reliability & Compliance
Support SLA (Enterprise)
Uptime SLA (Enterprise)
EU Hosting Available
Compliance
Flexible API & Real-time webhooks
Localized App / UI
Flexible & Compliant Recording Settings
Disclaimer:
The Information are gathered from publicly available sources (including company websites, pricing pages, and public documentation) as of January 2026. While we strive to keep this information accurate and up-to-date, software features and pricing change frequently. This comparison is intended for informational purposes only and does not constitute legal or professional advice. All trademarks and registered trademarks are the property of their respective owners and are use for identification purposes only. Spot an error? Please let us know at support@telli.com
telli’s AI agents have expanded our outbound capacity further than we thought possible. We’re saving time, reaching more leads, and seeing a huge spike in follow-ups from potential customers.
Mareike Wiethölter
Head of Process Management
Drive higher inbound throughput with AI-optimized call handling
10
X
increase in monthly call volume
telli is leading the charge for call automation in Germany. They tailored their voice agents to our exact business needs, and the efficiency gains have been incredible.
Martin Fricke
Product Manager
Offload routine intake calls to AI for cleaner, faster front-line operations
90
%
of information-gathering calls handled by a telli agent
telli is the most scalable and cost-efficient answer to call automation on the market. If you’re looking to ramp up sales without compromising on customer satisfaction, it’s a must.
Christoph Pirkl
CSO
Multiply call throughput using AI agents that operate without bottlenecks
4
X
completed call volume
We’ve been using telli for three months to book appointments with leads, and the results have been great. It’s surprisingly easy to use, and the AI agent consistently books appointments at the same rate or better than our internal call center.
Tommaso Piatti
Director Operations
Fill more technician calendars with AI-driven appointment scheduling
30
%
increase in weekly service appointments scheduled
telli delivers an incredibly human-like, scalable, and professional experience that's transformed how we handle customer calls. We're thrilled with both the product and the responsive, supportive team behind it.
Matthias Knoche
COO
Reach more customers on the first attempt with intelligent call sequencing
45
%
increase in connection rate
telli brought our sales floor from chaos to calm. Our team now focuses on actually helping customers, not just reaching and scheduling them — and we haven’t missed a lead since.
Richard Ruben
Co-founder and CEO
Convert more consultations into revenue with AI-guided follow-up and qualification
15
%
increase in CVR from consultation to sale
Features
Everything you need for better caller experience
Industries
Automate every call for every industry
HVAC & Solar
Real Estate
Call and convert buyer and seller leads instantly so you can schedule viewings before competitors do.
Financial Services
Follow up on inbound sign-ups instantly, pre-qualify prospects, and book advisor calls.
Insurance
Proactively contact leads for quotes or renewals and convert them with instant AI follow-ups.
Hiring & Recruitment
Engage candidates faster with automated outreach, screening calls, and interview scheduling.
Consumer & B2C Brands
Connect with prospects, qualify interest, and book consultations or demos at scale.
Telecom
Transform telecom with AI voice agents to deliver faster, smarter, and personalized customer experiences.
FAQ
Frequently Asked Questions
Do telli’s voice agents sound like AI?
No. telli’s voice AI is designed to sound natural, human-like, and conversational. Our customers consistently report that callers don’t realize they’re speaking with AI — and many find it hard to believe even after being told. The result is a smooth, engaging experience that feels like talking to a real customer support representative.
Can I optimize telli's AI voice agents?
Yes. telli includes a powerful prompt editor that allows you to refine responses, workflows, and conversation logic. You can adjust tone, instructions, and behavior to match your brand and operational needs — or our team can help you do so. Continuous optimization helps your AI voice agents become smarter, more accurate, and more aligned with your customer experience goals.
Is telli compliant?
Yes. telli is built with strict security and privacy standards, including HIPAA, GDPR, and SOC 2 compliance. All data is encrypted, access is tightly controlled, and processes are audited regularly. This ensures customer information remains secure and that your business meets regulatory obligations without additional effort.
Talk to Us About Your Voice AI Needs
Tell us a bit about your use case and team. We’ll help you understand how our voice AI fits your requirements.
