How much does Klinder-OSS cost?

Klinder-OSS uses flat predictable pricing at $9/month with no per-event charges. The open-source version is free to self-host.

Is Klinder-OSS self-hostable?

Yes. Klinder-OSS is fully self-hostable with zero vendor lock-in. You own your data and infrastructure.

What is the best open-source alternative to Mixpanel?

Klinder-OSS is a modern open-source alternative to Mixpanel that adds unified customer timelines and lifecycle email orchestration on top of typed event tracking.

Can Klinder-OSS replace Segment and Mailchimp?

Klinder-OSS combines event tracking, customer data, and email orchestration into one SDK — replacing the need to stitch together Segment, Mixpanel, and Mailchimp separately.

Does Klinder-OSS support TypeScript?

Klinder-OSS is built with TypeScript from the ground up. It uses Zod schemas for type-safe event definitions with full IDE autocomplete and compile-time validation.

Live Beta · Free for everyone

See everything your customers do.Send the right emailat exactly the right moment.

Name: Klinder-OSS
Price: 9 USD
Availability: PreOrder
Author: Klinder-OSS

Klinder tracks what users do in your app, shows each customer’s full story on one timeline, and sends emails automatically when they do — or stop doing — the things that matter. Free for everyone during beta.

Built by Dibbayajyoti

One install replaces Segment · Mixpanel · PostHog · LogRocket · Customer.io

The problem

Sound familiar?

5 dashboards, zero clarity

You're paying for an event tracker, a product analytics suite, and a customer data pipeline. None of them agree on the numbers. You still can't tell what a customer actually did.

Tracking breaks and nobody notices

Someone renames one thing in the code and a chart quietly goes blank. Nothing warns you. You find out three weeks later, mid-board-meeting.

Emails scattered across 4 platforms

Onboarding drips in one tool. Transactional receipts in another. Lifecycle nudges in a third. None share context about what the customer actually did.

Customer context trapped in silos

Support sees tickets. Product sees funnels. Sales sees CRM entries. Nobody has a single timeline showing what a customer experienced before they churned.

Tracking plan lives in a stale spreadsheet

A shared doc last touched six months ago by someone who left. New engineers fire events that match nothing upstream. Nobody validates. Nobody notices.

The bill climbs with every feature you ship

Usage-based pricing means every new event costs more to track. So you track less, understand less, and make decisions with half the picture.

The solution

One tool. Everything connected.

Install Klinder-OSS once and get tracking, customer timelines, and automated emails working together in minutes — instead of five disconnected subscriptions.

Track Events

Typed, schema-validated events. If it compiles, it's correct. No more "oops, wrong property name."

See Timelines

Every event, email, and interaction — in one scrollable timeline per customer. Full context, zero tab-switching.

Send Emails

Define lifecycle automations in code. When event X fires, send email Y. Bring your own Resend or SMTP key.

What changes

A week after installing

Answer “what happened with this customer?” in ten seconds

Open their timeline and scroll: every click, email, and session in one place. No tab-switching across five dashboards.

Onboarding and win-back emails run themselves

When a user signs up, goes quiet, or hits a milestone, the right email goes out automatically — no manual lists.

One bill instead of five

One flat price that doesn’t climb as your product grows. No per-event charges, ever.

Tracking that can’t silently break

Mistakes get caught while your developer writes the code — not three weeks later when a chart goes blank.

Why switch

One tool vs. stitching five together

What you get	Klinder-OSS	5 separate tools
See what a customer did	One scrollable timeline	Split across 5 dashboards
Emails that react to behavior	Triggered by real product events	Email tool can’t see product data
The monthly bill	One flat price	5 subscriptions that grow with usage
Setup & maintenance	One install	5 integrations that drift
Your data	Run it on your own server, free	Locked into each vendor

How it works

Up and running in 5 minutes

Three steps — only the first one needs a developer. Mistakes get caught while the code is written, before your users ever see them.

1
Connect your app
Your developer pastes a few lines of code — shown below.
2
Watch timelines fill up
Every signup, click, and payment appears in one feed per customer.
3
Set emails to send themselves
Pick a trigger — like “hasn’t logged in for 7 days” — pick an email. Done.

index.ts

1import { createClient, defineEvents } from '@klinder/sdk'

2import { z } from 'zod'

4const events = defineEvents({

5export_completed: z.object({ format: z.enum(['gltf']) })

6})

8const klinder = createClient({ publicKey, events })

9klinder.track('export_completed', { format: 'gltf' })

Type-safe. Schema-validated. Zero runtime errors.

Questions

Klinder shows you everything your customers do in your product — every click, signup, and payment, on one timeline per customer — and sends emails automatically based on what they do. One tool instead of separate analytics, tracking, and email products.

Setup takes a developer about 5 minutes — they paste a few lines of code into your app. After that, the dashboard, customer timelines, and email automations are point-and-click for anyone on the team.

Free for everyone during beta — no card, no event caps. After launch: self-hosting stays free forever, and the managed Cloud version is $9/month flat with no per-event or per-seat charges.

You get one tool instead of five — tracking, customer timelines, and emails that react to what customers actually do, all connected. And for developers: events are checked at compile time, so tracking can’t silently break.

About 5 minutes for a developer. Install it, describe the events you care about, and you’re tracking.

Beta is open — create an account and you’re in. Free for everyone while the beta lasts.

Anything that runs JavaScript or TypeScript. React, Next.js, Node.js, Express, Hono, Cloudflare Workers — if it can import an npm package, it works.

Beta is open

Get started in 30 seconds.

Klinder-OSS is free for everyone during beta. Create an account, drop in the SDK, and start sending events. When billing opens, you'll get the chance to migrate — no forced upgrade.