We Will Build, Install, & Manage An AI-Powered Phone System For Your Business, That Calls Every New Lead In Under 10 Seconds & Could Increase Your Revenue By Up To 391% In Less Than 30 Days.
All without hiring more staff, disrupting your operations, or any technical setup.
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Integrates with
AI-powered inbound & outbound
Answer every call instantly. Book appointments, qualify leads, and close sales without hiring extra reps.
Run across every channel
Phone, CRM, SMS. Synthesys integrates with the tools you already use to unify your communications.
Never miss revenue
Day or night, every customer gets answered. Synthesys works 24/7 to capture revenue and deliver support automatically.
Real outbound at massive scale
Launch thousands of personalized prospecting calls every day. Reach more decision-makers and close more deals without adding a single extra person.
Support and sell worldwide
Run sales and support calls in any language, 24/7. Expand into new markets overnight with AI that scales as fast as your ambitions.
Manage every conversation in one place
Track inbound, outbound, sales, and support calls with a single dashboard. Monitor performance, view transcripts, and stay in control in real time.
Stay connected on the go
Get instant alerts when leads are qualified, meetings are booked, or revenue is closed. Manage everything from your pocket with the Synthesys mobile view.
Fully Customizable
Fully customizable to your brand and systems
Knowledge Base
Agents that deeply understand your business, powered by your knowledge base
Connect internal documents, FAQs, and URLs in just a few clicks. With built-in Retrieval-Augmented Generation (RAG), agents provide accurate, real-time answers grounded in your own content, automatically reindexed as it changes.
Custom Voice Clones
Create unique brand voices and personalities for your agents
Pick from a wide range of expressive voices or clone your own for full control. Adjust tone, pacing, and language to suit different roles, regions, or customer types. Each agent can switch voices mid-conversation when needed.
Integration with your stack
Seamless integration with your existing tools and workflows
Connect agents to your internal tools and APIs to perform real tasks during a conversation. Fetch account data, trigger workflows, send updates, or log events in your existing systems, all in real time.
Integrations for everything
Synthesys comes ready to run out of the box. But if your business needs more, our ecosystem of CRM, sales, and support integrations connects you to the tools you already use — with over 95+ apps for whatever specialized features you might need.
5.0 - Excellent based on G2 Reviews
Here's Why Others Decided To Work With Us
$2M
in New Incremental
Revenue Generated
"We're closing more deals than ever with Synthesys's outbound calling. It automates personalized follow ups and prospecting, reaching leads we couldn't before. Our sales pipeline has exploded, and it's all hands-free."
Marco Stall
CEO
Parabolic
Marco Stall
CEO
Parabolic
$2M
in New Incremental
Revenue Generated
"We're closing more deals than ever with Synthesys's outbound calling. It automates personalized follow ups and prospecting, reaching leads we couldn't before. Our sales pipeline has exploded, and it's all hands-free."
Lerozier Holt
Founder
Titan Elite Fitness
$750K
Annual Revenue Boost
"I own a personal training business and I use Synthesys to onboard and qualify clients. It saves me an immense amount of time when it comes to getting my clients information, schedules, etc. Ever since implementing Synthesys into my business, I’ve almost tripled my client base."
Harsimran Singh
CEO
CrossTempo
30%
Payroll Costs Reduced
"By automating repetitive tasks with Synthesys, we've cut payroll costs significantly across our sales department. Synthesys now automates the outbound follow up work in a day, that would usually take 6-7 reps to do in months. We were able to cut our sales related payroll costs by 30% in the first three months."
I never anticipated just how much it would transform not only my business journey but also my entire perspective on what is possible.
This platform has revolutionized our business operations. The seamless integration and powerful features have helped us scale our marketing efforts efficiently while maintaining excellent customer relationships.
It's so sick.
Really great for what we do, we can get in touch with people instantly as soon as they submit a lead form on Google or Facebook.
I absolutely love it, I can't wait to make myself more millions of dollars with this.
"You guys beat everyone in terms of AI quality."
AI Voice Agents For Any Industry
Ready for any industry, from scheduling logistics to handling customer claims and 24/7 support. Our secure, multilingual Voice AI agents integrate directly into your enterprise systems. Synthesys delivers instant, high-quality automation for conversations that consume team time, enabling you to dramatically increase availability and lower operational costs.
Roofing Contractors
Book more inspections, qualify more jobs, and never miss a lead again. Synthesys handles call intake, quote requests, appointment scheduling, and project follow-ups. 24/7, in 50+ languages.
Financial Institutions
Accelerate customer interactions across lending, banking, and credit operations. Synthesys activates cards, qualifies loan applicants, upsells products, and verifies information instantly with human-like tone, 24/7.
Healthcare Providers
Deliver better patient experiences while reducing front desk workload. Synthesys automates appointment calls, reminders, insurance verification, and patient routing. 24/7, across languages, with full HIPAA compliance.
Restaurants
Let your staff focus on food and service. Synthesys handles the phones. Our AI books reservations, confirms orders, answers FAQs, and supports callers 24/7, across languages and locations.
Telecom Providers
Modernize your call center, reduce costs, and deliver world-class support. Synthesys handles plan upgrades, troubleshooting, porting, and billing inquiries—instantly, across any language or region.
The Platform Behind The Call
Support global audiences with automatic language detection, multilingual voice synthesis, and real-time switching powered by advanced turn-taking.
Support for all countries and languages
Phone numbers in 48 countries, 50+ languages, and mid-call language switching. Bring your own phone system via SIP trunking or we'll set you up.
Works with tools you already use
Connects to 200+ apps including your CRM and scheduling software.
Conversations that feel real
Knows when to talk, when to listen, and handles interruptions naturally.
"Synthesys allowed us to qualify inbound leads 24/7 and helped us stop wasting time on the phone with people who were unqualified."
Parker Nathans
Founder, Analytic Aim
Put Your Outbound On Autopilot
"We increased our premium revenue by a multiple using Synthesys to reach out to old leads that we had sitting in our CRM."
Stephen Storey
Founder, Insurance Company
Hands-off lead management
Responds to new leads, follows up, and books appointments automatically.
Run campaigns at scale
Launch thousands of calls at once. Agents leave voicemails and move leads through the pipeline without human involvement.
Built-in compliance
Follows your approved scripts, logs every call, and keeps a full audit trail.
Live transfers when it counts
When a call needs a real person, agents hand it off.
Telephony Integrations
Connect to Any Telephony System
Connect internal documents, FAQs, and URLs in just a few clicks. With built-in Retrieval-Augmented Generation (RAG), agents provide accurate, real-time answers grounded in your own content, automatically reindexed as it changes.
Numbers Driving Limitless Growth
Scaling businesses, one conversation at a time.
1M+
CONVERSATIONS/MONTH
AI-powered inbound and outbound calls delivered across industries worldwide.
30%
HIGHER CONVERSIONS
Average increase in closed deals compared to traditional phone reps.
50+
LANGUAGES
Conversations localized instantly, across every major global market.
99.99%
UPTIME
Enterprise-grade uptime so every customer, in every time zone, gets answered.
Frequently Asked Questions
What exactly is Synthesys, and what does it do?
Synthesys is an enterprise-level AI telecommunications platform specializing in voice infrastructure, designed to automate inbound and outbound calls. Our voice technology seamlessly engages in real-time, human-like conversations—answering incoming calls, intelligently routing them, scheduling appointments, leaving voicemails, and handling follow-ups via automated SMS and phone. Built to handle multilingual interactions effortlessly, Synthesys integrates smoothly into your existing tech stack.
Do you offer a free trial to test Synthesys?
Yes. Synthesys offers a fully guided, hands-on demo experience where you can test our AI-driven voice solutions. During this trial, you can experience inbound call handling, automated outbound campaigns, real-time appointment booking, voicemail detection, call escalation, and seamless CRM integrations. It’s the best way to evaluate how Synthesys reduces workload and boosts operational efficiency without any upfront commitment.
Does Synthesys replace human employees?
In short, yes. Synthesys was built to replace your team and enhance your top performers’ capabilities. Our intelligent voice automation handles repetitive, high-volume tasks such as qualifying leads, booking appointments, answering FAQs, and managing customer follow-ups. This frees your team to focus on higher-value interactions that require human judgment and empathy. It’s particularly effective after-hours, during scaling phases, and when handling multilingual calls globally.
How secure and compliant is Synthesys?
Synthesys prioritizes security and compliance. Our infrastructure uses advanced encryption and is fully compliant with SOC 2, HIPAA, and GDPR, making it ideal for sensitive sectors such as healthcare, financial services, and telecommunications. Your data remains secure and private, ensuring regulatory compliance at every interaction.
Can I customize Synthesys for my business needs?
Absolutely. Synthesys is built to be highly flexible and fully customizable. Whether you’re setting up sophisticated call routing, automated scheduling, lead qualification, or customer onboarding workflows, Synthesys offers comprehensive 1:1 done-for-you customization tailored to your operational strategy and business goals.
Does Synthesys integrate with our existing systems?
Yes. Synthesys integrates seamlessly with nearly any CRM, ERP, or support system—Salesforce, HubSpot, Zoho, Zendesk, GoHighLevel, and more—via direct webhooks. Maintain your existing workflows while enhancing them with powerful voice automation.
How quickly can we get started with Synthesys?
You can deploy Synthesys within days, not weeks. Our onboarding team handles initial setup and integration, so your support, sales, and operations teams see productivity gains immediately—with minimal IT involvement.
How do I maintain control over my brand’s voice with Synthesys?
Synthesys gives you total control over your brand’s tone, vocabulary, and conversation structure. Our advanced dialogue management lets you define escalation rules and fallback responses, ensuring brand consistency and professional interactions at all times.
What happens if Synthesys doesn’t understand something?
If Synthesys encounters unfamiliar input, it triggers intelligent fallback strategies: asking clarifying questions, suggesting alternatives, or escalating to a human agent based on rules like customer sentiment or repeated recognition failures. This keeps every conversation smooth and professional.
Does Synthesys identify voicemails, spam, and wrong numbers?
Yes—Synthesys includes voicemail detection, spam filtering, and call validation. It automatically skips non-productive contacts (voicemails, disconnected numbers, spam), so your call resources stay focused on revenue-generating conversations.
Do I need technical skills or developers to set up Synthesys?
No. We’re fully done-for-you. Our technical fulfillment team handles all integrations, prompting, and setup. Your non-technical teams simply manage and monitor via our user-friendly dashboard.
Can I use custom or cloned AI voices with Synthesys?
Absolutely. Choose from a library of realistic voices or upload your own for custom voice cloning. Align every interaction with your unique brand tone and style.
How well does Synthesys scale with high call volumes?
Synthesys is built for enterprise-level scale. Whether you process hundreds or tens of thousands of calls per day, our infrastructure delivers real-time, low-latency performance—no additional headcount required.
What exactly is AI voice automation?
AI voice automation leverages ASR, NLU/LLM, dialogue management, and neural TTS to conduct natural, end-to-end voice conversations—automating tasks like inquiry handling, appointment booking, lead qualification, 24/7 support, and outbound campaigns.
Why should I choose Synthesys over other AI voice solutions?
Synthesys leads the market with real-time conversational accuracy, deep customization, enterprise-grade security/compliance, multilingual support, seamless integrations, and proven ROI. It’s the only platform designed for high-stakes, scalable voice infrastructure.
How does Synthesys technology work behind the scenes?
Synthesys combines four key components:
ASR: Converts speech to text, filtering noise for clarity.
NLU & LLM: Interprets intent and extracts context.
Dialogue Management: Decides next actions—answers, routing, escalation.
Neural TTS: Produces natural, human-like speech responses.
Together, they deliver seamless, end-to-end intelligent call management.