Local-First Software:
Zero Latency, True Privacy & Offline Resilience
Say goodbye to loading spinners, cloud outages, and corporate data harvesting. Junglans Solutions pioneers local-first software architecture where user data stays on client hardware, operations execute in microseconds, and sync happens seamlessly across devices.
The 7 Pillars of Local-First Software
We engineer our systems according to the formal principles formulated by Martin Kleppmann and Ink & Switch, elevated for mission-critical enterprise environments.
No Spinners & Instant Response
All data reads and writes occur directly on local memory and fast NVMe disks. Users never wait for a round-trip network response to view or modify their data.
Multi-Device Synchronization
Your data effortlessly replicates between your desktop, tablet, and phone. State converges seamlessly whenever devices discover each other over local LAN or internet.
Network is Optional
Offline is the default operating model, not a fragile second-class error fallback. Work seamlessly on airplanes, remote field stations, or secured bunkers.
Conflict-Free Collaboration
Powered by state-based CRDTs (Conflict-Free Replicated Data Types), concurrent edits merge deterministically without modal lock-ups or lossy overwrites.
Data Longevity & Ownership
Your data is stored in standard, accessible formats (SQLite files, JSON, or plain text). If our servers disappear tomorrow, your software and data remain 100% usable forever.
Zero-Telemetry Privacy
End-to-end encryption by default. Synchronization servers only route opaque encrypted binary deltas and possess zero cryptographic ability to read your content.
Built on @junglans/trail Ecosystem
We developed, tested, and published our own open-source suite of local-first libraries to solve state persistence, peer replication, and React synchronization.
@junglans/trail
High-throughput local event streaming and WAL logger. Writes events to an append-only log with microsecond timestamping and vector clock metadata.
npm install @junglans/trail↗@junglans/trail-server
Ultra-lightweight WebSocket and socket sync coordinator. Relays encrypted delta changes between clients without maintaining application state or reading payloads.
npm install @junglans/trail-server↗@junglans/trail-react
Declarative React bindings. Offers useTrailState and reactive query subscriptions for instantaneous 60fps UI updates.
import { createTrailStore } from '@junglans/trail';
import { useTrailQuery } from '@junglans/trail-react';
// 1. Initialize local SQLite WAL storage on client device
const store = createTrailStore({
storage: 'sqlite-wal',
databasePath: './enterprise-app.db',
encryption: 'AES-256-GCM',
sync: {
peerDiscovery: 'local-lan',
serverRelay: 'wss://internal.mesh.corp/trail'
}
});
// 2. Instant local write: Zero network latency wait time (< 0.5ms)
await store.append('project.task.created', {
id: 'task-108',
title: 'Audit HIPAA Compliance Logs',
status: 'in_progress',
author: 'SecOps Lead'
});Local-First Architecture FAQ
Answers to common architecture, performance, and synchronization questions.
Build Your Next Product with Local-First Engineering
Eliminate server downtime, reduce cloud infrastructure overhead by 90%, and give your users instant, delightful software that works unconditionally offline.