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Channels

Five channels, one API

Every channel connector in Arka exposes the same consistent surface: send, receive, template, route, retry, report. Swap channels, fan-out messages, or mix them in a single flow.

Capability matrix

What each channel supports

Capability Email WhatsApp SMS Slack Teams
Send text messages✓✓✓✓✓
Rich / HTML content✓Partial—BlocksCards
Media attachments✓✓MMS✓✓
Templates✓✓✓✓✓
Two-way messaging✓✓✓✓✓
Delivery receiptsBounces✓✓✓✓
Read receiptsPixel✓—✓✓
Interactive componentsLinksButtons—ActionsActions
Threaded conversations✓✓—✓✓

One flow. Every channel.

Start with Email today, add WhatsApp next quarter, and turn on Teams when your enterprise needs it — without touching your flow code.