Tech stack
25 projects use ClickHouse.
Open-source LLM observability, evals, and prompt management
Langfuse is an open-source platform for tracing, evaluating, and improving LLM applications and AI agents, with prompt management and experiments built in.
Open-source observability with logs, metrics, and traces in one tool
SigNoz is an OpenTelemetry-native observability platform that combines logs, metrics, and traces with APM, dashboards, and alerts in one tool.
Lightweight web analytics without cookies or personal data
Plausible answers the handful of questions most sites actually ask - what pages get read, where readers came from, what converted - and deliberately declines to answer the rest. There are no cookies, no cross-site identifiers, and no consent banner needed.
Cookieless open-source web and product analytics with session replay and funnels
Rybbit is a self-hosted web and product analytics platform with a readable dashboard and an 11 KB cookieless tracking script.
Open-source observability unifying logs, traces, metrics, and session replay
HyperDX is an open-source observability platform unifying session replays, logs, traces, metrics, and errors for faster production debugging.
Open-source fullstack monitoring with replay, errors, logs, and traces
Highlight is an open-source fullstack monitoring platform with session replay, error monitoring, logging, and tracing, plus a Docker self-hosting path.
Open-source uptime monitoring, incident response, and status pages in one platform
OneUptime is an open-source monitoring and incident platform with uptime checks, on-call alerting, status pages, and correlated logs, metrics, and traces, self-hosted or as a managed cloud.
Open-source usage-based billing with metering, credits, and invoicing
Flexprice is an open-source billing platform for usage-based, credit-based, and hybrid pricing, with real-time metering and automated invoicing.
Web and product analytics in one cookie-free dashboard
OpenPanel merges the two dashboards most teams keep open side by side: page-level web analytics and event-level product analytics. Funnels, retention curves, and session replay sit next to traffic sources rather than in a separate product.
Open-source APM with traces, metrics, and logs in one UI
Uptrace is a self-hosted APM that collects OpenTelemetry traces, metrics, and logs into one UI with dashboards, alerting, and PromQL-style queries.
Open-source tracing, evals, and observability for AI agents
Laminar is an open-source observability platform purpose-built for AI agents, with OpenTelemetry-native tracing, evaluations, and behavior monitoring built in.
Self-hostable customer engagement for automated lifecycle messaging
Dittofeed is a self-hostable customer engagement platform that automates marketing and transactional messages across email, SMS, webhooks, and mobile push.
Open-source usage metering and billing for AI and API products
OpenMeter is an open-source usage-metering and billing platform for AI and API products, turning CloudEvents usage data into entitlements, Stripe invoices, and credit grants.
Open-source LMS for creating and running online courses.
LearnHouse is an open-source learning management system for creating and running online courses with chapters, activities, quizzes, and certificates.
Open-source user onboarding platform for product tours, checklists, and surveys
Usertour is a self-hostable user onboarding platform for building in-app product tours, checklists, and surveys, positioned as an open-source alternative to Userflow and Appcues.
Privacy-first open-source analytics for mobile and desktop apps
Aptabase is an open-source analytics platform for mobile, desktop, and web apps that replaces Firebase or Google Analytics with fully anonymous event tracking.
Self-hosted observability backend for logs, metrics, and traces
Gigapipe is a self-hosted observability backend that stores logs, metrics, traces, and profiles in ClickHouse and serves Loki, Prometheus, Tempo, and Pyroscope APIs.
Open-source usage-based billing with metering, plans, and invoicing
Meteroid is an open-source pricing and billing platform for SaaS, infrastructure, and AI companies, combining usage metering, plan management, subscriptions, and invoicing behind one API.
Cookieless, privacy-first web analytics with error tracking
Swetrix is a self-hosted web analytics platform with cookieless, GDPR-compliant tracking, real-time dashboards, error tracking, and performance monitoring.
Cookieless product analytics with funnels, errors and uptime
Databuddy is an open-source product analytics platform for startups that tracks visitors, custom events, funnels, and goals with one cookieless script.
Privacy-first web and product analytics with user journeys
Vemetric is a privacy-first web and product analytics platform that shows how visitors arrive, convert, and use a product, hosted in the EU with no cookies by default.
Privacy-first proof-of-work CAPTCHA with invisible checks
Private Captcha is a privacy-first proof-of-work CAPTCHA that blocks bots with invisible cryptographic checks instead of puzzles, tracking, or cookies.
Open-source forms platform with analytics, API, and self-hosting
Formizee is an open-source forms platform for designing forms, collecting submissions through an endpoint URL, and viewing realtime analytics.
Privacy-first web analytics with funnels, journeys, and no cookies
Betterlytics is a privacy-first web analytics platform with funnels, user journeys, session replay, and error tracking in one dashboard. Sites add one lightweight script, and EU-based data handling means no cookie banner is needed for the analytics itself.
Cookieless, GDPR-compliant web analytics you can self-host
Prisme Analytics is a self-hosted, privacy-focused web analytics platform written in Go, offering real-time insights with unlimited data retention and no cookie banners.