# D++ Review: A C++ Library for Discord Bots

> D++ gives C++ developers a native interface for Discord API v10, with caching, sharding, interactions, voice, and websocket transport. It suits teams that want Discord functionality without implementing REST requests, event handling, and cache management directly.

**brainboxdotcc/DPP** — C++ Discord API Bot Library - D++ is Lightweight and scalable for small and huge bots!

- Repository: https://github.com/brainboxdotcc/DPP
- Website: https://dpp.dev/
- Stars: 1,399 · Forks: 210
- Language: C++
- License: Apache-2.0
- Published: 2026-10-16 · Updated: 2026-10-16 · Language: en
- Canonical page: https://hysenlabs.com/projects/brainboxdotcc-dpp

## Why D++ Exists for Native C++ Discord Bots

D++ addresses the work required to connect a C++ program to Discord. A bot needs more than sending a POST request to create a message. It also has to receive gateway events, identify commands, maintain application state, connect to voice servers, and keep that state available across many guilds. D++ places those responsibilities in a reusable library written in modern C++.

The intended users are C++ developers building Discord bots, including services with a large number of guilds or users. The repository describes D++ as lightweight and notes a small memory footprint even when caching substantial data. It supports Discord API v10 and presents caching, sharding, clustering, slash commands, interactions, ETF websocket processing, and voice as library features.

That scope makes D++ more relevant than a thin HTTP client for teams that want one native process. It also introduces a substantial API and a dependency on the library's event model. Projects that only need a single request, or teams standardized on a dynamically typed runtime with an existing Discord package, should examine whether the extra native integration is justified.

## Inside D++'s Discord Event and Cache Design

The README's ping example shows the central control path. A `dpp::cluster` receives the bot token, registers callbacks with `on_slashcommand`, registers another callback with `on_ready`, and enters the event loop through `bot.start(dpp::st_wait)`.

An incoming slash command is delivered to the callback. The handler compares `event.command.get_command_name()` with `ping`, then calls `event.reply("Pong!")`. Commands are not manually created for every process start. The ready handler uses `dpp::run_once<struct register_bot_commands>()` to guard creation, then submits a `dpp::slashcommand` through `global_command_create`.

D++ also maintains caches for guilds, channels, guild members, roles, and users. This lets event handlers consult library-managed objects instead of rebuilding local state for every gateway event. The repository identifies ETF support as part of its websocket throughput path and states that D++ covers as much of the Discord API specification as possible. For a large bot, that means the process still has to model memory growth from cached objects, connection lifecycle, and shard behavior. The library's claimed efficiency does not remove those operating concerns.

## Installing D++ Across Linux, Windows, and ARM

The README does not provide a single universal installation command. It directs users to the installation documentation for their preferred package manager and to a separate source-build guide. The repository also exposes package references for AUR, vcpkg, Conan, and Homebrew, while the README says compiled packages are available for Windows, Raspberry Pi, Debian x86 and x64, and RPM-based distributions.

For a first real use, install D++ through the documented route for the target platform, create a C++ translation unit containing the following README example, and build it with the package's prescribed linker settings. The code reads `BOT_TOKEN` directly from the environment, so that variable must exist when the program starts. A missing or invalid token prevents the cluster from presenting a usable bot connection.

The example registers the `ping` command globally when the ready event first occurs and replies with `Pong!` when invoked. Discord permissions and application registration behavior are not explained in the README, so a new user must also verify that the created command is visible to the intended application and server.

```cpp
#include <dpp/dpp.h>
#include <cstdlib>

int main() {
	dpp::cluster bot(std::getenv("BOT_TOKEN"));

	bot.on_slashcommand([](auto event) {
		if (event.command.get_command_name() == "ping") {
			event.reply("Pong!");
		}
	});

	bot.start(dpp::st_wait);
	return 0;
}
```

This excerpt follows the README's event loop and slash-command callback structure, but omits its ready handler and command registration. The complete README version should be used when the command needs to be created.

## The Repository Dockerfile for a Source Build

The repository's `Dockerfile` gives a concrete Ubuntu build environment. It starts from Ubuntu Noble, installs OpenSSL, zlib, Opus, CMake, a compiler toolchain, Git, and Make, copies the repository into `/usr/src/DPP`, then configures a build with tests disabled. This path is useful when a developer wants a reproducible native build environment rather than selecting a prebuilt package.

The build configuration and compilation commands are explicit in the repository file:

```dockerfile
FROM ubuntu:noble@sha256:4fbb8e6a8395de5a7550b33509421a2bafbc0aab6c06ba2cef9ebffbc7092d90

RUN apt-get update && apt-get install --no-install-recommends -y libssl-dev zlib1g-dev libopus-dev cmake pkg-config g++ gcc git make && apt-get clean && rm -rf /var/lib/apt/lists/*

WORKDIR /usr/src/DPP
COPY . .
```

The next stage runs `cmake .. -DDPP_BUILD_TEST=OFF`, compiles with `make -j "$(nproc)"`, and installs the result. The exact host command for building and running that image is not given in the README, so this file confirms the container build recipe rather than a complete deployment command.

The source requirements list `cmake` version 3.13 or later. Supported compiler options include `g++` version 8 or higher, `clang` version 6 or higher, AppleClang 12.0 or higher, Microsoft Visual Studio 2019 or 2022, and `clang-cl`. Platform support is therefore tied to an operating system that its provider still officially supports. D++ does not support systems past end of life.

## Discord API v10, Sharding, Voice, and Scaling Boundaries

D++ is designed for more than text commands. The README lists sharding and clustering, with the shard count either specified by the application or selected by the library. It also documents slash commands and interactions, plus sending and receiving voice audio through DAVE end-to-end encryption. Those features place D++ closer to a complete bot runtime than a REST wrapper.

The scale claim is tied to architecture. One process can manage multiple shards, and the cache is organized around guilds, channels, members, roles, and users. That can reduce repeated data handling in a large bot, but the README does not document memory limits, connection quotas, rate-limit behavior, deployment topology, or a documented rollback procedure. It also does not state how a failed gateway reconnection is surfaced to the application.

The library is therefore a good fit when a bot's workload depends on persistent Discord objects and high event throughput. It is a poor fit when the application needs a small, stateless administrative script or when the team cannot support native dependencies such as OpenSSL, zlib, and Opus. Voice and clustering are capabilities, not proof that every deployment will handle the expected load without measurement.

## License, Compatibility, and Upgrade Work

The repository identifies D++ as licensed under `Apache-2.0`. That license is a relevant project-level constraint for redistribution and modification, but this review does not provide legal advice. Teams should inspect the repository's `LICENSE` file and their own compliance requirements before distributing a linked application.

The last repository push was on 2026-10-02, and the recent release list includes `v10.1.6` dated 2026-08-05, `v10.1.5` dated 2026-05-20, and `v10.1.4` dated 2025-12-17. These dates indicate recent repository activity and released versions, but the README does not provide a compatibility matrix for every supported compiler or a written upgrade policy.

Because D++ exposes Discord API objects, interactions, cache data, and voice features, an upgrade can require source review even when the application uses only a small part of the library. The repository contains code generation documentation, CMake files, CI configuration, and a `CHANGELOG`-style release history outside the README excerpt, but the repository does not state the exact migration burden for a particular version. Pinning a release and reviewing its release notes is more concrete than assuming that a newer version is drop-in compatible.

## D++ Compared with Calling Discord Directly

A direct Discord client is the practical alternative for a very small or highly customized program. Such an approach would use the Discord REST endpoints and gateway protocol directly, then implement token handling, HTTP requests, websocket frames, event dispatch, reconnects, caching, and any voice behavior inside the application. That avoids linking D++ but transfers those responsibilities to the project.

D++ makes a different architectural choice. It places those mechanisms behind a C++ API, including `dpp::cluster`, event callbacks, cache-aware objects, slash commands, sharding, and voice. The README's example therefore expresses application behavior through D++ types rather than raw endpoints. The trade-off is that the application depends on D++'s abstractions, headers, build configuration, and release compatibility.

The direct approach can be simpler when the application makes one isolated request and has no long-lived Discord session. D++ becomes more defensible for a long-running bot with repeated event handling, cached guild data, multiple shards, or voice. The repository does not document a performance comparison against a raw client, so the decision should be based on required features and maintenance responsibility rather than an unsupported speed claim.

## What to Check Before Adopting D++

Start by matching the target platform to the documented installation route. Linux is described as the ideal environment, while Windows has compiled DLL and LIB files and a separate Windows Bot Template. Raspberry Pi users have prebuilt Debian packages for ARM64, ARM6, and ARM7. Mac OS X, FreeBSD, and OpenBSD are also described as supported, although the README does not include their exact package commands.

Next, inspect how the application will obtain `BOT_TOKEN` and how command registration is handled. The sample uses `std::getenv`, so deployment tooling must inject that environment variable without printing it into logs. The `register_bot_commands` guard is local to the shown application pattern, and the README does not explain Discord's command propagation or permissions.

Finally, identify the non-text features that matter. If the bot needs sharding, cache access, slash commands, or voice, D++ provides documented mechanisms for those requirements. If it needs a simple synchronous request with no long-lived session, those mechanisms may be unnecessary. Verify the selected package, compiler, voice dependencies, and release notes before adopting the library.

## Conclusion

Adopt D++ when the bot must run in a native C++ service and needs caching, sharding, slash commands, or voice without a separate runtime. Do not choose it solely for rapid setup without reading the platform-specific installation guide and source-build instructions. Verify compiler compatibility, the required Discord permissions, and the consequences of moving from the README example to your intended release process before committing.

## FAQ

### How do I install D++ for a C++ Discord bot?

The README directs users to the package-manager installation documentation and a separate source-build guide. It lists package channels such as AUR, vcpkg, Conan, and Homebrew, but does not provide one universal installation command.

### Does D++ support Discord slash commands and voice?

Yes. The README lists slash command and interaction support, along with voice sending and receiving using DAVE end-to-end encryption.

### What compilers and operating systems does D++ support?

The build requirements include CMake 3.13 or later. Supported compilers include g++ 8 or higher, clang 6 or higher, AppleClang 12.0 or higher, Microsoft Visual Studio 2019 or 2022, and clang-cl. The README says support is limited to operating systems that their providers still officially support.

## Sources

- [brainboxdotcc/DPP on GitHub](https://github.com/brainboxdotcc/DPP)
- [License: Apache-2.0](https://github.com/brainboxdotcc/DPP/blob/master/LICENSE)
- [Project website](https://dpp.dev/)
- [README](https://github.com/brainboxdotcc/DPP/blob/master/README.md)
- [Releases](https://github.com/brainboxdotcc/DPP/releases)

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Hysen Labs editorial analysis, written from the project's own repository and release notes. Cite the canonical page: https://hysenlabs.com/projects/brainboxdotcc-dpp