Self-hosted Alternatives

Observable

Observable is a cloud platform for creating, sharing, and collaborating on interactive data notebook...

Obsidian

Obsidian is a Markdown-based personal knowledge management and note-taking application that stores n...

OceanBase Database

OceanBase Database is a cloud-native, distributed NewSQL relational database (MySQL-compatible) prov...

Ocoya

Ocoya is a social media management platform that uses AI to generate content, schedule and publish p...

OctoEverywhere

Cloud service that connects OctoPrint and Klipper 3D printer instances to a remote web portal, provi...

OctoPrint

Web-based interface for controlling and monitoring 3D printers via a host (commonly a Raspberry Pi)....

Octobot

Cloud-based crypto trading bot platform that automates trading strategies across multiple exchanges,...

Octoparse

Octoparse is a no-code web scraping SaaS that extracts data from websites into structured formats. I...

Octopus Deploy

SaaS deployment automation and release management platform that orchestrates application and infrast...

Odoo

Odoo is a cloud-based suite of integrated business applications for ERP, including accounting, CRM,...

Offcloud

Cloud-based download manager that fetches content from torrents, Usenet, and direct links into the c...

OfficeSpace Software

Workplace management SaaS that centralizes office space planning, desk and room booking, employee di...

Oh Dear

SaaS website monitoring service that checks uptime, SSL/TLS certificate validity, broken links, sche...

Oku

Oku is a cross-device reading and bookmarking app for saving links, subscribing to RSS feeds and new...

Olark

Olark is a hosted live chat service that embeds a chat widget on websites to enable real-time conver...

Ombi (Hosted)

Hosted request-management service for media server ecosystems (Plex, Emby, Jellyfin). Accepts and tr...

Omeka.net

Hosted Omeka service for creating and publishing digital collections and online exhibits. Web-based...

OmniFocus

Task management app for macOS, iOS and iPadOS that lets users create projects, actions, tags, perspe...

Omnisend

Omnisend is an email and SMS marketing automation platform for ecommerce. It provides campaign and t...

Omnivore

Omnivore is a web-based read-it-later and RSS reading service for saving articles, newsletters and w...

OnBoard Board Management Software

Board portal for organizations to manage governance and meetings: prepare agendas and board books, s...

OnSong

OnSong is an iOS/iPadOS app for musicians to manage chord charts, lyrics and setlists for live perfo...

OnTheClock

Cloud-based employee time clock and time-tracking service providing clock-in/clock-out, timesheets,...

OneLogin

Cloud identity and access management platform that provides single sign-on (SSO), multi-factor authe...

OneSignal

Customer messaging platform for web and mobile applications that sends push notifications, in‑app me...

OneUp

Cloud accounting and business-banking platform for small businesses offering invoicing, expense and...

OneUptime

Cloud monitoring platform for uptime, logs, traces, synthetic checks, status pages, incident managem...

Onetime Secret

Service that creates one-time, expiring links for sharing sensitive information. Secrets can be conf...

Online-Convert

Cloud-based file conversion service that converts documents, images, audio, video, and e-books betwe...

Onshape

Cloud-native CAD platform for 3D mechanical design that runs in the browser. Provides parametric mod...