About Us

About SIMtrix

The bridge between your physical SIM card and Bitrix24 CRM. No VoIP. No gateways. Just your number.

Our Mission

We believe every business call and SMS should live in your CRM, not lost in a phone. SIMtrix bridges your physical SIM card with Bitrix24 — no VoIP, no gateways, just your number.

Every conversation matters. When a sales rep makes a call or sends an SMS, that interaction should automatically appear on the contact's timeline in Bitrix24. SIMtrix makes this happen seamlessly, using the phone your team already carries.

Why We Built This

Sales teams waste 30+ minutes daily switching between phone and CRM. VoIP systems add costs and complexity. SMS gateways charge per message. We built SIMtrix to eliminate all three problems with one simple bridge.

30+
Minutes saved daily per rep
100%
Calls & SMS logged in CRM
0
Per-message gateway fees

Bridge, Not Storage

Your data stays on your phone and in your Bitrix24. SIMtrix never stores SMS content or call recordings. We are a bridge, not a warehouse.

When a call or SMS passes through SIMtrix, we relay the event metadata to Bitrix24 and discard it. Recordings are uploaded directly to your Bitrix24 storage. We have zero access to your conversations.

Technology

Built with NestJS, Next.js, and Kotlin. Hosted on EU servers in Germany. AES-256 encryption. GDPR compliant from day one.

Backend
NestJS (TypeScript)
Frontend
Next.js 14 + shadcn/ui
Android
Kotlin (native)
Database
PostgreSQL + Redis
Security
AES-256, TLS 1.3, JWT
Hosting
EU (Germany), Docker
EU Servers (Germany)
GDPR Compliant
AES-256 Encryption
Bitrix24 Technology Partner

The Team

SIMtrix is built by ANTENA sp. z o.o., a software company based in Poland specializing in CRM integrations and business automation tools.

With years of experience in Bitrix24 ecosystem and telephony integrations, we understand the real-world challenges of sales teams who need their phone calls and messages properly logged in CRM. We built SIMtrix because we saw the gap between expensive VoIP solutions and the simplicity of using the phone already in your pocket.

Get in Touch

Have questions about SIMtrix? Need help with integration? We are here to help.

[email protected]

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