Realtime, without the plumbing.
Shadowblips is hosted WebSocket infrastructure that keeps millions of clients in perfect sync. Ship live chat, presence, notifications and collaborative experiences in minutes — we handle the connections, scaling and failover.
No credit card. Free tier includes 200k messages/day and 100 concurrent connections.
Powering realtime for teams everywhere
The platform
Everything you need to go realtime
A single, elegant API for pub/sub, presence and event streaming — backed by an edge network built for scale and engineered to never drop a beat.
Pub / Sub Channels
Broadcast events to public, private or encrypted channels with a single call. Subscribe on the client and updates arrive instantly — no polling, ever.
Presence
Know exactly who's online, who's typing and who just left. Build live cursors, member lists and collaboration features on state we keep in sync for you.
End-to-end Encryption
Encrypted channels keep payloads private in transit. Authenticate subscribers with your own backend and revoke access the moment you need to.
Global Edge Network
Connections terminate at the nearest of 18 regions and mesh over our private backbone, so a user in Tokyo and one in Berlin feel like they're in the same room.
Webhooks & Triggers
React to connections, disconnections and channel events server-side. Fan-in millions of client events without melting your own infrastructure.
Live Debug Console
Watch every message flow through your app in real time. Inspect payloads, replay events and trace latency down to the millisecond from your dashboard.
Built for developers
Ten lines to realtime
Drop in our SDK, publish an event, subscribe a client. That's the whole integration. Works with the tools you already ship — JavaScript, React, Swift, Kotlin, Laravel, Go and more.
- ✓ Fully compatible protocol — swap in without rewriting your app
- ✓ Official SDKs for 12+ languages and frameworks
- ✓ Automatic reconnection, backoff and message buffering
- ✓ Typed events and channel authorization out of the box
// Connect to Shadowblips import Shadowblips from 'shadowblips-js'; const sb = new Shadowblips('app_key', { cluster: 'eu-central', encrypted: true, }); // Subscribe to a channel const channel = sb.subscribe('orders'); // React to realtime events channel.bind('order.created', (order) => { renderToast(`New order #${order.id}`); });
Use cases
If it moves, we can sync it
From live dashboards to multiplayer editors, teams build their most engaging features on Shadowblips.
Live chat & messaging
Deliver messages, typing indicators and read receipts with sub-25ms latency, at any scale.
Collaborative apps
Sync cursors, selections and document state so teams can create together in real time.
Live dashboards
Stream metrics, orders and events straight to the browser without a single page refresh.
Notifications
Push instant in-app alerts the moment something happens on your backend.
Multiplayer & gaming
Broadcast game state and player presence to lobbies of thousands with predictable latency.
Location & tracking
Follow drivers, fleets and deliveries on a live map updated with every heartbeat.
Built to scale
From your first user to your ten-millionth
Shadowblips elastically scales connections and throughput for you. No clusters to babysit, no sockets to tune, no 3am pages — just realtime that keeps working while you sleep.
99.999% uptime
Multi-region redundancy and automatic failover keep your realtime layer online even when a whole region has a bad day.
Elastic throughput
Burst from hundreds to millions of concurrent connections instantly. You'll never hit a wall you didn't choose.
Observability included
Metrics, message logs and latency traces ship in the box, with alerting that plugs into the tools your team already uses.
Add realtime to your app today
Spin up an app key and publish your first event in under five minutes. Scale when you're ready — the free tier is genuinely free.