Developer Intelligence

All signal.
No feed.

4DA reads the internet for developers — privately, locally — and gets sharper every day.

Your codebase decides what's relevant. Everything else is rejected. It learns from how you engage with what it shows you — yesterday's noise becomes tomorrow's signal.

Hacker News, GitHub, Reddit, YouTube, arXiv, Stack Overflow, Lobsters, Bluesky, and 12+ more — scored on 5 axes against your actual stack. 2+ signals required to pass.

Download for Free npx MCP Server
Runs locally · Zero telemetry · BYOK · Works offline with Ollama
4DA Brief tab showing today's top picks and signal stream
Rust + Tauri 2.0 20+ Sources 5-Axis Scoring 33 MCP Tools ~15MB Binary

Automatic Context Discovery

Scans your Cargo.toml, package.json, go.mod, and pyproject.toml. Builds a graduated domain profile from your actual stack — no manual configuration.

Multi-Signal Confirmation Gate

Every item is scored across 5 independent axes. An item needs 2+ confirming signals to pass the gate. Typical rejection rate: 95%+ of incoming content.

Privacy by Architecture

Raw data never leaves your machine. BYOK for AI features. Zero telemetry. Full offline mode with Ollama. Architecturally unable to see your data.

Pricing

Free means free. No expiration. No catch.

The free tier is a complete product. Most individual developers will never need more.

Free

$0 forever
No credit card. No account. No expiration.
  • All 20+ content sources
  • Full 5-axis scoring engine
  • AI daily briefings + weekly digest
  • Multi-signal confirmation gate
  • Auto context discovery (ACE)
  • STREETS Playbook (all 7 modules)
  • Behavior learning
  • MCP server (33 tools)
  • CLI binary
  • Unlimited use
Download Free

Signal

$12 /month
Or $99/year. BYOK -- you bring your own API key.
  • Everything in Free, plus:
  • Signal tab intelligence (Key Signals + analytics)
  • Score Autopsy (5-axis breakdown)
  • Developer DNA profiling
  • Signal chain analysis
  • Knowledge gap detection
  • Semantic shift tracking
  • Attention analytics
  • Standing queries
  • Priority support
Subscribe to Signal

45-day free trial included. Download to start.

Download

Pre-built binaries with auto-updates. No Rust toolchain required.

Platform Format Auto-updates
Windows .exe installer (NSIS) Yes
macOS .dmg (Apple Silicon + Intel) Yes
Linux .AppImage / .deb Yes

Windows: if SmartScreen warns on first run, click "More info" then "Run anyway" — the app is safe, code-signing is in progress.

How It Works

From noise to signal in four stages

Your Codebase
Cargo.toml, package.json, go.mod + 9 more
→
ACE Scanner
Builds domain profile
→
5-Axis Scoring
Context, Interest, ACE, Dep, Learned
→
Signal
Only what matters
An item needs 2+ independent signals to pass the confirmation gate. Everything else is rejected.
scoring

5-Axis Scoring

Context, Interest, ACE, Dependency, and Learned axes independently evaluate every item. Multi-signal confirmation gate rejects 95%+ of incoming content.

privacy

Privacy First

All data stays on your machine. Raw content never leaves. BYOK for Anthropic, OpenAI, or fully local with Ollama. Zero telemetry. Transparent cost tracking.

context

Auto Context Discovery

Scans your Cargo.toml, package.json, go.mod, and Git activity to build a graduated domain profile of your technology identity.

learning

Behavior Learning

Learns from your save and dismiss actions with 30-day exponential decay. Scoring improves continuously as you use it.

MCP Integration

Your AI assistant gets signal too

4DA ships an MCP server with 33 intelligence tools. Install it with one command and your AI assistant draws from your scored, filtered intelligence feed -- not generic internet search results.

Works with Claude Code, Cursor, and any MCP-compatible host. MIT licensed. Always free.

  • "What breaking changes affect my deps this week?"
  • "Give me my daily briefing"
  • "What knowledge gaps does my project have?"
  • "Show signal chains for the Tokio update"
// Install -- one command
npx @4da/mcp-server

// Or add to claude_desktop_config.json
{
  "mcpServers": {
    "4da": {
      "command": "npx",
      "args": ["@4da/mcp-server"]
    }
  }
}
Trust

Built for developers who read the source

No trust-us claims. Verify everything yourself.

Free means free

No credit card. No account. No expiration. The full scoring engine with all 20+ sources, AI briefings via your own API key, and the complete STREETS Playbook, forever. Signal features include a 45-day trial.

Source available

FSL-1.1-Apache-2.0 license. Read every line. Converts to Apache 2.0 after 2 years.

Data stays local

We architecturally cannot see your data because we never receive it. No cloud. No sync. No server.

Clean uninstall

Delete the app, delete the data folder. Nothing persists. No residual cloud storage.

FAQ

Common questions

What is 4DA in one sentence?
4DA reads the internet for developers — privately, locally — and gets sharper every day. It's a Tauri 2.0 desktop app that scans 20+ sources, scores everything against your actual codebase, and rejects the 99% that isn't for you.
How does it get sharper?
It learns from how you engage with what it shows you. Items you complete, save, or share strengthen related signals; items you bounce or dismiss weaken them. Yesterday's noise becomes tomorrow's signal. All learning happens locally on your machine — nothing leaves your computer.
How is this different from daily.dev or Feedly?
daily.dev personalizes by engagement (what you click). Feedly aggregates by subscription (what feeds you add). 4DA scores by relevance to your actual codebase -- your Cargo.toml, package.json, and Git activity define the filter. It's categorically different: project-aware scoring instead of behavioral or topical filtering.
Does 4DA read my source code?
4DA reads manifest files (Cargo.toml, package.json, go.mod, etc.) and Git metadata to build your technology profile. It does not read your actual source code files. The profile is built and stored locally -- nothing leaves your machine.
Can I use it without any API keys?
Yes. The free tier works entirely without API keys for scoring and content surfacing. AI-powered features like daily briefings are also free -- just add an LLM provider. Use Ollama for fully local inference or provide your own API key (BYOK) for Anthropic or OpenAI.
What happens if I never pay?
Nothing changes. The free tier includes all 20+ sources, the full 5-axis scoring engine, AI daily briefings (BYOK), behavior learning, the MCP server with 33 tools, the complete STREETS Playbook (all 7 modules), and the CLI. The free tier never expires. Signal features include a 45-day trial so you can evaluate before subscribing. Most individual developers will never need Signal.
What's the confirmation gate?
The confirmation gate requires 2+ independent scoring axes to agree before an item enters your feed. A single keyword match isn't enough. A single interest match isn't enough. Independent confirmation from multiple relevance dimensions is required. This is what makes the high rejection rate possible.
How big is the download?
About 15MB. 4DA is built with Tauri 2.0 (Rust), not Electron. Pre-built binaries with auto-updates for Windows, macOS, and Linux.
Is it open source?
Source available under FSL-1.1-Apache-2.0. You can read, audit, and self-host. The license converts to Apache 2.0 (full open source) after 2 years. The MCP server is MIT licensed.

Stop reading everything.
Start knowing what matters.

Your codebase already knows what's relevant. Let it decide.

Download 4DA -- Free
No account · No credit card · No telemetry · ~15MB download

4DA surfaces the signal. STREETS teaches you to convert it into revenue. 7 modules, all free inside 4DA.

Explore the STREETS Playbook →

Questions? support@4da.ai