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    Messaging as a Service

    One messaging API. The stack operated for you.

    One API for SMS, WhatsApp, RCS, email and voice, with the messaging stack underneath - vendor integrations, multi-vendor routing, failover and observability - operated for you as a service.

    Built for Product & Engineering

    Why teams choose this

    You do not want to integrate five vendor SDKs, build a routing layer, and own carrier escalations. You want a clean API, predictable delivery, and someone else carrying the telco operations weight.

    One API, every channel

    SMS, WhatsApp, RCS, email and voice through a single integration. No per-vendor SDKs, no per-channel branches in your code.

    Routing and failover, managed

    Multi-vendor routing with automatic failover. Vendor outages do not become your incidents.

    Observability built in

    Delivery, latency and cost are visible per route, vendor and message without you wiring up dashboards.

    BYOV optional

    Use our vendor contracts, bring your own, or mix the two. Your commercials, your call.

    One endpoint. Every channel.

    Send through a single API and let routing, channel fallback and vendor selection happen underneath.

    Messaging API - Channel Failover Flow
    Configurable
    Your Application
    POST /v1/messages/send
    Single API call - we handle the rest
    Flowstates Routing Engine
    SMS
    Primary
    Failed
    failover
    RCS
    Failover 1
    Delivered
    WhatsApp
    Failover 2
    Standby
    Email
    Failover 3
    Standby
    Message Delivered via RCS
    Delivery confirmed - callback sent to your webhook

    You configure the channel priority and failover sequence. If delivery fails on any channel, the next channel in your configured sequence is tried automatically until the message is delivered.

    What your team stops owning

    Vendor SDKs, routing logic, retry and failover code, and carrier escalations move off your backlog.

    See it against your stack

    We will map your current vendors, routes and incidents and show what we would take on, augment or simplify.

    Book a Messaging Review