When is WebSocket the right choice vs Server-Sent Events vs polling?

WebSocket is best when you need bidirectional, low-latency communication -- chat, multiplayer, collaborative editing. Server-Sent Events work well for one-directional server-to-client streams like live feeds and dashboards where the client does not need to send data back. Polling is rarely the right answer at scale; it works for infrequent updates where simplicity matters more than latency. We assess your specific use case and recommend the protocol that matches your latency target, infrastructure budget, and client environment.

How do you scale real-time features to thousands of concurrent connections?

WebSocket connections are stateful, which means naive horizontal scaling breaks session continuity. We solve this with a shared pub/sub layer -- typically Redis Pub/Sub or a dedicated message broker -- so that any server node can fan out messages to any connected client. We load-test the architecture before delivery, confirm your connection targets are met, and document the scaling path for when traffic grows further.

What infrastructure do real-time applications need?

At minimum: a WebSocket-capable server process, a pub/sub layer for multi-node deployments, and a load balancer configured for sticky sessions or connection-aware routing. Depending on your event volume, you may also need a message broker like Kafka or RabbitMQ to decouple producers from consumers. We size the infrastructure as part of the engagement and provide Terraform or deployment config so you control it.

What does real-time app development cost?

Adding a WebSocket feature to an existing application -- a live notification feed, a real-time count, a presence indicator -- typically runs $15,000 to $60,000. Building a full real-time platform with collaborative editing, event-driven backend, and live dashboards ranges from $40,000 to $150,000. We scope each engagement before quoting so you get a fixed price tied to a defined outcome, not an hourly estimate that drifts.

When is WebSocket the right choice vs Server-Sent Events vs polling?

WebSocket is best when you need bidirectional, low-latency communication -- chat, multiplayer, collaborative editing. Server-Sent Events work well for one-directional server-to-client streams like live feeds and dashboards where the client does not need to send data back. Polling is rarely the right answer at scale; it works for infrequent updates where simplicity matters more than latency. We assess your specific use case and recommend the protocol that matches your latency target, infrastructure budget, and client environment.

How do you scale real-time features to thousands of concurrent connections?

WebSocket connections are stateful, which means naive horizontal scaling breaks session continuity. We solve this with a shared pub/sub layer -- typically Redis Pub/Sub or a dedicated message broker -- so that any server node can fan out messages to any connected client. We load-test the architecture before delivery, confirm your connection targets are met, and document the scaling path for when traffic grows further.

What infrastructure do real-time applications need?

At minimum: a WebSocket-capable server process, a pub/sub layer for multi-node deployments, and a load balancer configured for sticky sessions or connection-aware routing. Depending on your event volume, you may also need a message broker like Kafka or RabbitMQ to decouple producers from consumers. We size the infrastructure as part of the engagement and provide Terraform or deployment config so you control it.

What does real-time app development cost?

Adding a WebSocket feature to an existing application -- a live notification feed, a real-time count, a presence indicator -- typically runs $15,000 to $60,000. Building a full real-time platform with collaborative editing, event-driven backend, and live dashboards ranges from $40,000 to $150,000. We scope each engagement before quoting so you get a fixed price tied to a defined outcome, not an hourly estimate that drifts.

Your users are refreshing the page to see updated data because your app has no live updates?
You added polling as a quick fix and now your server is drowning in unnecessary requests?

Real-Time App Development

RaftLabs builds real-time applications using WebSocket, Server-Sent Events, and event-driven architecture. We deliver production-grade real-time features for web and mobile -- live dashboards, collaborative editing, push notifications, and multiplayer functionality -- on a fixed cost.
Every engagement starts with a technical diagnosis: we identify the right protocol for your use case, size the infrastructure, and define what latency and reliability targets are actually achievable. Then we build, test under load, and hand over a system your team can operate.

WebSocket, SSE, and event-driven architecture -- we choose the right tool for your latency target
Load-tested for thousands of concurrent connections before delivery
Fixed-cost engagements with defined scope and delivery milestones
Full handover -- code, infrastructure config, and runbook included

RaftLabs builds real-time web and mobile applications using WebSocket, Server-Sent Events, and event-driven architecture. We deliver live dashboards, collaborative editing tools, push notification systems, and multiplayer features on fixed-cost engagements with load testing included.

Real-time features your users notice

Most web applications are built around a request-response model: the user asks, the server answers, the page updates. That model breaks down the moment your users need to act on data that changes faster than they are willing to refresh. Operations teams watching live orders, traders monitoring positions, field crews tracking assets, and users collaborating on shared documents all need updates that arrive the moment the underlying data changes.

RaftLabs builds the WebSocket servers, event-driven backends, and real-time front-end integrations that make that possible. We have shipped live dashboards, collaborative editors, real-time notification systems, and multiplayer features for production applications -- and we load-test every system before handover to confirm it holds up under the connection counts your business actually needs.

What we build

WebSocket application development

Persistent bidirectional connections for chat, multiplayer, collaborative tools, and live feeds. We design the server architecture, handle authentication over WebSocket, and implement the reconnection logic that keeps connections stable across network interruptions.

Live collaboration software

Multi-user editing where two people can change the same document, canvas, or dataset at once without overwriting each other. We implement operational transformation or CRDT-based conflict resolution depending on your use case, with presence indicators and cursor sharing.

Real-time dashboards and monitoring

Operational dashboards that update automatically as data changes -- fleet maps, production line monitoring, financial displays, and operations centres. We build the data pipeline, the WebSocket or SSE layer, and the front-end charts that render updates without page flicker.

Event-driven architecture

Kafka and RabbitMQ message broker design for systems where services need to communicate without tight coupling. Event sourcing, CQRS, and async workflow orchestration for backends that need to scale horizontally and recover gracefully from failure.

Real-time notifications and alerting

Push notification systems that reach users the moment a threshold is crossed, a status changes, or an action is required. WebSocket-delivered in-app alerts, browser push notifications, and webhook fan-out to downstream systems -- all with delivery confirmation.

Real-time mobile features

WebSocket and SSE integrations for React Native and native mobile applications. Live location tracking, in-app messaging, push-triggered UI updates, and background sync for mobile clients that need to stay current even when the user is not actively interacting.

Polling is costing you more than WebSocket would.

If your server is handling repeated poll requests for data that rarely changes, a properly architected real-time layer will reduce load and improve user experience at the same time. Let us show you what that looks like for your stack.

Talk about your real-time project

Real-time development by product

WebSocket Development -- persistent bidirectional connections for chat, live feeds, and collaborative tools
Live Collaboration Software -- multi-user editing with conflict resolution, presence, and version history
Real-Time Dashboard Development -- live operational dashboards that update automatically as data changes
Event-Driven Architecture -- Kafka and RabbitMQ message broker design for loosely coupled, scalable systems

Custom Software Development -- web and mobile applications that real-time features are built into
IoT Development -- sensor data pipelines that feed real-time dashboards and alerting systems
Mobile App Development -- mobile applications with WebSocket and push notification integrations

Frequently asked questions

: WebSocket is best when you need bidirectional, low-latency communication -- chat, multiplayer, collaborative editing. Server-Sent Events work well for one-directional server-to-client streams like live feeds and dashboards where the client does not need to send data back. Polling is rarely the right answer at scale; it works for infrequent updates where simplicity matters more than latency. We assess your specific use case and recommend the protocol that matches your latency target, infrastructure budget, and client environment.
: WebSocket connections are stateful, which means naive horizontal scaling breaks session continuity. We solve this with a shared pub/sub layer -- typically Redis Pub/Sub or a dedicated message broker -- so that any server node can fan out messages to any connected client. We load-test the architecture before delivery, confirm your connection targets are met, and document the scaling path for when traffic grows further.
: At minimum: a WebSocket-capable server process, a pub/sub layer for multi-node deployments, and a load balancer configured for sticky sessions or connection-aware routing. Depending on your event volume, you may also need a message broker like Kafka or RabbitMQ to decouple producers from consumers. We size the infrastructure as part of the engagement and provide Terraform or deployment config so you control it.
: Adding a WebSocket feature to an existing application -- a live notification feed, a real-time count, a presence indicator -- typically runs $15,000 to $60,000. Building a full real-time platform with collaborative editing, event-driven backend, and live dashboards ranges from $40,000 to $150,000. We scope each engagement before quoting so you get a fixed price tied to a defined outcome, not an hourly estimate that drifts.