Which sgcWebSockets edition do I need?

1. Do you need source code?

The Basic editions ship pre-compiled DCU files only. They are Delphi-only — no C++ Builder, no Lazarus / FPC and no Linux64 target. If you need any of those toolchains, or you want full source code visibility, skip Basic and go to question 2.

Pick Basic if: You only use Delphi on Windows, you don't need to read or modify component source, you want a lower-priced option and you're happy with 6 months of updates instead of 12.

2. Are you only writing clients, or do you also run a server?

If your application only consumes WebSocket / MQTT / AMQP / WAMP / STOMP / HTTP/2 services, or only calls AI/LLM and exchange APIs, the Standard edition is enough. It ships every client component, every API integration, OAuth2 / JWT client, P2P clients, and the SChannel / OpenSSL transports.

If you also operate a server — you accept inbound WebSocket connections, host an OAuth2 / JWT / WebAuthn server, host a STOMP or WAMP broker or run a DataSnap WebBrokerBridge — you need Professional or higher.

3. How many concurrent connections does your server need to handle?

The Professional server is built on Indy and handles a few thousand concurrent connections comfortably. If you need to scale to tens of thousands of concurrent WebSocket connections, you need the Enterprise high-performance stack:

• IOCP Indy Server — Windows kernel-mode async I/O completion ports.
• EPOLL Indy Server — Linux64 epoll-based equivalent for high-throughput Linux deployments.
• HTTP.SYS Server — Windows kernel-mode HTTP listener (URL prefix registration).
• LoadBalancer Server — in-process load balancer that spreads connections across multiple worker servers.
• Proxy Server — WebSocket / HTTP forward / reverse proxy with TLS termination.
• Firewall component — per-IP rate limit and ban list at the listener level.
• HTTP/2 + HTTP.SYS DataSnap bridges — for Embarcadero DataSnap REST projects that need HTTP/2.

4. Do you also need sgcSign, sgcOpenAPI, sgcBiometrics or sgcIndy?

If you'll use two or more of our component libraries on the same project, the All-Access bundle is usually cheaper than buying them individually. It includes Enterprise sgcWebSockets, sgcSign, sgcOpenAPI, sgcBiometrics and sgcIndy, plus all future products released during the licence term.