Open Source Everything

Building blocks for apps – 16 subcategories

Internal tool builders

Build admin panels and internal apps quickly

8 alternatives · 6 fullReplaces Retool

App backends

Ready-made backend for your app

7 alternatives · 5 fullReplaces Firebase

Login & identity

Let users sign in securely

9 alternatives · 7 fullReplaces Auth0, Okta

Phone & voice APIs

Add calls and texts to apps

3 alternativesReplaces Twilio

SaaS starter kits

Start a software business from a template

1 alternative · 1 fullReplaces ShipFast, Supastarter, SaaS Pegasus

Email sending for apps

Sending an app's own emails, like sign-ups and password resets

1 alternative · 1 fullReplaces Mailgun, SendGrid

Product analytics & session replay

Seeing how people use your app or website, step by step

5 alternatives · 2 fullReplaces Mixpanel, Amplitude, FullStory, LogRocket

Push notifications

Sending notifications to people's phones and computers

2 alternativesReplaces OneSignal

Translation management

Translating an app or website into other languages, as a team

1 alternative · 1 fullReplaces Lokalise, Crowdin, Transifex, POEditor

Web frameworks

Code frameworks for building websites and web apps

5 alternatives · 4 full

Web scraping

Collecting data from websites automatically

4 alternatives · 3 fullReplaces Apify, Bright Data, SerpApi, ScrapingBee

UI components and charts

Ready-made buttons, tables, grids and charts for apps

4 alternativesReplaces Handsontable, AG Grid Enterprise, Highcharts, Kendo UI

Desktop and mobile app frameworks

Code frameworks for building desktop, phone and terminal apps

3 alternatives · 1 full

Bot protection and CAPTCHAs

Keeping bots and AI crawlers off a website

4 alternatives · 2 fullReplaces Google reCAPTCHA, hCaptcha, Cloudflare Turnstile

Live updates and sync

Pushing live updates and syncing state between users

4 alternatives · 3 fullReplaces Pusher, Ably, PubNub

Encryption libraries

Code libraries for encrypting data and messages

3 alternatives · 2 full

Related categories

Writing code

API tools, Terminals, Shells and command-line add-ons, Game engines and game-making tools, Package managers, Testing tools, Git apps and helpers, Seeing and exploring a codebase, Code review helpers, Code checkers, Project starters and code snippets, Docs and README tools, Ready-made coding environments, Everyday developer helpers, Reverse engineering, Code editors

16 subcategories66 open projects

Hosting, shipping & running code

Server & app monitoring, App hosting & deployment, Code hosting, Dependency and code security checks, Containers and Kubernetes, Tools for open-source maintainers, Automated builds & tests, Feature flags, Infrastructure as code

9 subcategories51 open projects

Databases, data & science

Site & app search, Data pipelines, SQL databases, Database apps and tools, Time-series databases, Math and science tools, Statistics and data analysis, Caches & key-value stores, Graph databases, Data warehouses

10 subcategories35 open projects
Gaps About Licenses Privacy Credits & data r/TrueOpenSource Code