I built a free, privacy-first WakaTime alternative (using Go & MongoDB)

I admit it: I love coding stats (maybe sometimes).

There is something satisfying about seeing exactly how many hours I spent in VS Code this week, or realizing that my "quick script" actually took 4 hours of debugging.

For years, WakaTime has been the gold standard for this. It’s a great tool, but I had two problems:

• Privacy: I wasn’t comfortable sending my detailed file names and coding activity to a third-party server.
• Cost: I wanted historical data (past 2 weeks) without paying a monthly subscription.

So, being a developer, I did the only logical thing: I spent 3 weeks building my own version.

Meet TakaTime.

It is an open-source extension for VS Code and Neovim that tracks your coding activity and syncs it to your own personal MongoDB.

The Architecture: Speed is Everything

My biggest fear was creating a plugin that slowed down my editor. Neovim users (myself included) are obsessed with speed. If saving a file takes even 100ms longer because of my plugin, it’s getting uninstalled.

To solve this, I used a Hybrid Architecture:

The Editor Plugin (Thin Client):

• VS Code: A lightweight TypeScript extension.
• Neovim: A pure Lua plugin.

Job: These plugins do almost nothing. They just detect a "Save" event or a "Keystroke" and pass a tiny message to a background process.

The Core (Heavy Lifter):

• Written in Go (Golang).
• It runs as a background binary process.
• It handles the database connection, the caching, the debouncing, and the API calls.

Because the editors communicate with the Go binary asynchronously, the main thread is never blocked. You can mash :w or CTR+S (Save) as fast as you want, and your editor won’t freeze.

The "Heartbeat" Logic

You can’t just upload to the database every time you press a key. That would crash your network and spam your DB.

Instead, I implemented a Debounced Heartbeat system.

Event: You type code.

Cache: The Go binary records the timestamp and file name in memory.

Check: If the last upload for this file was less than 2 minutes ago, do nothing.

Upload: If it’s been >2 minutes, push a "Heartbeat" to MongoDB.

This reduces database writes by 99% while still keeping your stats accurate.

The Stack: Why MongoDB Atlas?

I needed a database that was:

• Free (forever).
• Easy to access from anywhere (Cloud).
• NoSQL (flexible schema for different file types).

MongoDB Atlas was the perfect fit. Their free tier offers 512MB of storage. Since text-based heartbeat data is tiny, that 512MB is enough to store years of coding history for a single user.

The best part? You own the data. I don’t see it. You just paste your connection string into the plugin, and it talks directly to your cluster.

Setting it Up (It takes 2 mins)

I wanted the onboarding to be as smooth as possible.

1. For VS Code Users

I published the extension to the Marketplace. It automatically downloads the correct Go binary for your OS (Windows, Mac, or Linux) when you first install it.

Link : Download For VS Code

2. For Neovim Users

I built a Lazy.nvim compatible plugin.

return {
"Rtarun3606k/taka-time.nvim",
lazy = false,
config = function()
require("taka-time").setup()
end,
}

Link For neovim nvim takatime

The Payoff: GitHub Profile Stats

Collecting data is useless if you can’t see it.

I built a CLI tool (packaged with the binary) that generates a markdown report. You can run this using a GitHub Action to automatically update your Profile README every night.

Create the Workflow

Create a file in your repo at .github/workflows/takatime.yml and paste this content:

name: Update TakaTime Stats

on:
schedule:
- cron: "0 0 * * *" # Runs every midnight UTC
workflow_dispatch:      # Allows manual trigger

jobs:
update-readme:
runs-on: ubuntu-latest
permissions:
contents: write # Needed to download releases

steps:
- name: Download Taka-Report Binary
env:
GH_TOKEN: ${{ github.token }}
run: |
# Downloads the latest stable binary
gh release download --repo Rtarun3606k/TakaTime --pattern "taka-report-linux-amd64" --output taka-report
chmod +x taka-report

- name: Generate Report & Update Profile
env:
MONGO_URI: ${{ secrets.MONGO_URI }}
GIST_TOKEN: ${{ github.token }}
TARGET_REPO: ${{ github.repository }}
run: ./taka-report -days=7

It looks like this:

What’s Next?

This project was a massive learning experience in cross-platform systems engineering. And building this taught me more about processes, threads, and CI/CD than any lecture could.

The project is Open Source and I’d love your help!

• Web Dashboard: I’m planning to build a React-based web dashboard to view historical trends.
• More Editors: IntelliJ/JetBrains support is on the roadmap.

If you like the idea of owning your data, give it a try!

Repo: github.com/Rtarun3606k/TakaTime

Happy Coding!