Relayion
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About

Built for the phone
you already have.

Relayion is a REST API for SMS. It runs through Android phones on your own SIM card. The device is already yours, the number is one your contacts already know, and the plan is one you're already paying for.

We built Relayion at Sibilis because businesses need programmatic SMS without the complexity of traditional gateways. Android turned out to be the right delivery layer. It runs on local numbers, SIM plans teams already pay for, and hardware they already control.

How we build

Built with discipline and judgment.

The same principles that guide every Sibilis product shape how Relayion is designed, delivered, and maintained.

Clear Approach
The API does what you expect. No hidden abstractions, no surprises in production.
Disciplined Standards
Reliability, structured error handling, and predictable delivery workflows are built in from day one.
Lifecycle Consistency
From pairing your first device to handling edge cases in production, the system behaves the same way.
Ownership Beyond Delivery
We stay involved. When something needs to grow or change, we do it deliberately.
Built by

Sibilis

Sibilis builds practical software infrastructure for business operations and communications. Relayion reflects that same focus on reliable systems, clear interfaces, and infrastructure businesses can control.

For implementation questions, operational concerns, or commercial discussions, you can reach the Relayion team at hello@relayion.com.

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