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Synthflow AI Tech Stack

No-code voice AI platform for automating enterprise phone operations

Technology, Information and Internet Berlin 51–200 employees Founded 2023 Privately Held

Synthflow AI builds a no-code platform for deploying voice AI agents that handle high-volume, routine phone calls in contact centers and BPO environments. The stack reveals production-grade real-time voice infrastructure: WebRTC, Twilio, FreeSWITCH, and Kamailio for call routing, paired with LangChain and LlamaIndex for LLM orchestration. The hiring mix is engineering-heavy (9 roles) with accelerating sales momentum (6 roles), indicating they're moving from platform maturation into customer acquisition—a typical pattern for voice AI startups scaling into mid-market.

Tech Stack 32 technologies

Core StackPython JavaScript AWS FastAPI Twilio LangChain Redis PostgreSQL Linux Go OpenTelemetry Cursor Make n8n Zapier GCP WebRTC LlamaIndex FreeSWITCH Kamailio Bash VoIP Jaeger WebSockets Genesys Avaya SIP LinkedIn Claude

What Synthflow AI Is Building

◆Challenges

Managing routine calls
Scaling real-time voice ai
Project delays
Customer churn
Maintaining high uptime
Routine interaction workload
Internal coordination
Budget overruns
Reducing routine calls
Optimizing growth and gtm processes

▲Active Projects

Ai phone agent platform implementation
Ai agent experiences
Api integration for voice ai
Real-time voice ai system development
Fault-tolerant system design
Developer-facing tools
Crm integration
Playbook development
Develop best practices and playbooks for implementations
Llm-based product features

Hiring Activity

Accelerating30 roles · 15 in 30d

Department

Engineering

9

Sales

6

Marketing

5

Product

4

Design

3

Executive

1

HR

1

Ops

1

Seniority

Mid

13

Senior

10

Intern

4

Manager

2

Junior

1

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About Synthflow AI

Synthflow AI is a Berlin-based voice AI platform that automates phone interactions for mid-market and enterprise contact centers. The product is designed as a no-code interface for configuring and deploying AI agents that handle routine inbound and outbound calls, reducing manual workload without increasing headcount. The platform integrates with major contact center software (Genesys, Avaya) and CRM systems, and operates across real-time voice infrastructure with fault-tolerance and monitoring built in. Founded in 2023, the company currently employs 51–200 people and is hiring across the US, Germany, and UK.

HeadquartersBerlin

Company Size51–200 employees

Founded2023

Hiring MarketsUnited States, Germany, United Kingdom

Frequently Asked Questions

What tech stack does Synthflow AI use?

Python, JavaScript, GCP, AWS, FastAPI, WebRTC, Twilio, LangChain, LlamaIndex, FreeSWITCH, Kamailio, and PostgreSQL for the core platform. Call routing uses SIP and VoIP protocols; observability relies on OpenTelemetry and Jaeger.

What integrations does Synthflow AI support?

CRM integrations, contact center platforms (Genesys, Avaya), and workflow automation tools (Make, n8n, Zapier). API-first architecture enables custom integrations for enterprise deployments.

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