Beside v0.3.0 — High-Speed Local File Transfer (Windows & Android)

Target Repository: https://github.com/thisma-labs/beside
Milestone Tag: v0.3.0
Official Portal: https://beside-license-worker.khthisald.workers.dev
Release Date: 2026-11-12

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What is Beside?

Beside is a local-first, peer-to-peer sharing application built for Windows 10 / 11 (64-bit) and Android 8.0+ (arm64).

Transfers travel machine-to-machine strictly over your local Wi-Fi network at full wire speed. No cloud servers, no account registration, zero telemetry, and a constant 64 KB RAM streaming footprint regardless of whether you are sending a 2 KB note or a 50 GB directory tree.

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What's New in v0.3.0

1. Up to 3.85x Faster Multi-File & Folder Transfers

• Kernel-Level Atomic Finalization: On Android devices, incoming files are finalized using native non-overwriting kernel renames (renameat2), bypassing secondary userland copies and filesystem syncs.
• Physical Test Results: Transferring a folder of 50 small files completes in 5.5 seconds (down from 21.2 seconds on v0.2.0) — a 74% latency reduction.

2. Zero-Lag Control Framing (TCP_NODELAY)

• Per-file transfer acknowledgments and control headers stream with sub-millisecond turnarounds, eliminating 40–200 ms TCP Nagle packet delays on wireless stacks.
• Phone-to-PC uploads of large files are up to 2.63x faster (11.57s -> 4.40s on 10 MB).

3. Simultaneous Multi-Device Sharing & Custom Device Groups (Beside Pro)

• Concurrent Multi-Peer Streaming: Select multiple paired devices and stream files, folders, or snippets simultaneously over isolated Mutual TLS 1.3 streams.
• Custom Named Device Groups: Create and manage local device groups (e.g., Workstations, Living Room, Family) stored in device_groups.json with zero cloud dependencies.
• Resilient Offline Handling: Automatically skips offline group members without stalling and tracks per-peer delivery progress.

4. Hardened Collision Safety & Dedicated Support Portals

• Atomic non-overwriting guarantees: incoming files never overwrite existing files; duplicate names safely auto-suffix (document (1).pdf).
• Windows Desktop Support: https://github.com/thisma-labs/beside-windows-support
• Android Mobile Support: https://github.com/thisma-labs/beside-android-support

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Download Artifacts & SHA-256 Checksums

Windows 10 / 11 (64-bit x64)

Package	File Name	Size	SHA-256 Digest
Inno Setup Installer	Beside-Setup-v0.3.0-x64.exe	12.42 MB	d18dddf7ecea4cb5807ca3c573fa46020ea080e665a3570547bec797c8f2bc71
Portable Archive	Beside-v0.3.0-Windows-x64.zip	14.84 MB	a5a641f47ffb67d635cfad001f1a51dbb42b2110122d57dad17e989cb31c1c01

• SourceForge Mirror: https://sourceforge.net/projects/beside-windows

Android 8.0+ (arm64-v8a)

Package	File Name	Size	SHA-256 Digest
Signed Release APK	Beside-v0.3.0-Android-arm64.apk	27.91 MB	4c8f371fe51afdaca3ad43b36ddbf1f58095ca083e2efe1fb269853b81fd0d84

• SourceForge Mirror: https://sourceforge.net/projects/beside-android

Verify Checksums

:::powershell
# Windows
Get-FileHash -Algorithm SHA256 Beside-Setup-v0.3.0-x64.exe

:::bash
# Android / Linux / macOS
sha256sum Beside-v0.3.0-Android-arm64.apk

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Pricing & Availability

• Beside Free: 100% free forever for 1-to-1 file transfers up to 1 MB, unlimited incoming wire-speed transfers, and zero telemetry.
• Beside Pro ($14.99 USD Lifetime): Unlimited file sizes, recursive directory trees, multi-device fanout sharing, and custom device groups on up to 3 personal devices. Available exclusively on Gumroad.