Open Source Alternatives To Popular Software

New Relic is an observability platform that provides APM, infrastructure monitoring, log management, and real-time analytics. It helps engineering teams understand and optimize their software performance.

Nitro PDF Pro (formerly Nitro Pro) is a commercial PDF editor from Nitro Software, available on Windows, macOS, and via the cloud. It bundles viewing, editing, e-signing, OCR, and document conversion into a single paid product aimed at business users.

Noom is a subscription weight-loss program that combines calorie and food logging with daily lessons, behavioral coaching, and a color-coded food system. It is mobile-first, cloud-hosted, and requires a paid auto-renewing plan for the full program.

A proprietary password manager from Nord Security.

Open source alternatives to NordVPN.

Open source alternatives to NotebookLM.

Notion is an all-in-one AI-powered workspace that combines notes, tasks, wikis, databases, and project management tools into a unified platform. It enables teams and individuals to centralize information, automate repetitive workflows, and collaborate seamlessly—from simple docs to advanced knowledge bases and live project tracking.

Obsidian is a private, flexible note-taking app—designed to sharpen your thinking by letting you store and link ideas securely on your own device. It offers powerful organization tools like bidirectional note linking, an interactive graph view, a highly customizable interface with thousands of plugins and themes, and an open file format so you truly own your data.

Visual no-code web scraping tool that lets users extract data from any website using a point-and-click interface. Supports cloud extraction, scheduling, and API access.

Odoo is an open-core business application suite with inventory, manufacturing, purchase, sales, and accounting modules. The Community edition is free and self-hostable, while Enterprise and Odoo Online are sold as subscriptions.

Okta is a cloud-based identity and access management platform used by enterprises worldwide. It provides single sign-on (SSO), multi-factor authentication, user lifecycle management, and API access management, enabling organisations to securely connect employees, partners, and customers to applications.

OneDrive is Microsoft cloud storage service, bundled with Windows and Microsoft 365. It offers file syncing across devices, real-time co-authoring in Office apps, and personal vault storage.

OneSignal is a customer engagement platform for push notifications, email, SMS, and in-app messaging used by millions of developers and marketers.

Browser-based parametric CAD platform from PTC with built-in version control and real-time collaboration, sold as a subscription with a free plan for public documents.

OpenAI is a proprietary AI research and deployment company behind the GPT family of large language models, DALL-E image generation, and the OpenAI API platform. The OpenAI API offers a managed fine-tuning service for customizing GPT-3.5, GPT-4o, and other models on proprietary datasets, billed per training and inference token. The service handles dataset upload, supervised fine-tuning (SFT), and DPO, with deployment through OpenAI's hosted inference endpoints.

OpenAI's hosted API for building and running agents on OpenAI models. It bundles built-in tools, hosted and partner sandboxes, and managed execution in OpenAI's cloud, billed at OpenAI model rates plus standard tool and sandbox rates.

OpenReplay is a session replay and analytics platform that helps teams understand user behavior by recording and replaying user sessions on web applications.

OpenRouter is a unified API for accessing hundreds of large language models from providers such as OpenAI, Anthropic, Google, Meta, and Mistral through a single OpenAI-compatible endpoint. It handles routing, automatic failover, and load balancing across providers, and offers pricing comparison, a model leaderboard, and usage analytics. Models are billed pay-per-token with no subscription, which has made it a popular aggregation layer for AI apps and coding agents.

Opsgenie is Atlassian's cloud-based incident management and alerting service. It routes alerts to on-call teams, applies escalation policies, and coordinates incident response.

Digital experience platform whose Feature Experimentation product (formerly Optimizely Full Stack) provides feature flags, A/B testing, and progressive delivery for product teams.

AI-powered meeting note-taking and real-time transcription service that captures conversations, generates summaries, and makes meetings searchable.

Overcast is a powerful yet simple podcast player for iOS, known for its Smart Speed, Voice Boost features, and clean interface. It offers a free ad-supported tier and a premium subscription.

Oxford Dictionary encompasses the Oxford English Dictionary and the Oxford Dictionaries API by Oxford University Press, the authoritative records of the English language. Subscriptions and paid API keys are required for full access.

PDF Expert is a paid PDF reader and editor from Readdle for macOS and iOS. It focuses on fast PDF viewing, annotation, form filling, and lightweight editing, and is widely used as the default PDF tool on Apple platforms.

PM2 is a process manager for Node.js applications with a CLI, cluster mode, log rotation, and automatic restarts. The daemon itself is open source, while the vendor sells PM2 Plus and PM2 Enterprise: hosted monitoring dashboards, alerting, and metrics for the processes you run with it. It supervises processes but only schedules jobs through a basic cron_restart option, not a full scheduler.

PagerDuty is a cloud-based incident response and on-call management platform. It routes alerts to on-call schedules and escalation policies, and coordinates incident response across teams.

Pandora is a music streaming and automated music recommendation service owned by Sirius XM. Built around the Music Genome Project, it is best known for personalized radio stations that play music similar to a seed artist, song, or genre. Free listening is ad-supported, while Pandora Plus and Pandora Premium subscriptions remove ads and add offline listening, unlimited skips, and full on-demand playback and playlist creation.

Organize your recipes, make meal plans, and create grocery lists. Features cloud sync across all devices, web importing from any site, smart grocery lists, interactive recipes with timers, and monthly meal planning.

Free no-code web scraping tool that turns dynamic websites into structured data. Uses machine learning to understand page layouts and extract data automatically.

PartsBox is a hosted inventory and parts-management app for electronics makers and small manufacturers, covering stock, bill-of-materials, purchasing, and production planning on a subscription.

Privacy-first clipboard manager for Mac, iPhone, and iPad by WeTransfer. Save snippets, sync securely, and boost productivity with smart shortcuts and instant paste history.

A powerful clipboard manager for macOS by Tapbots. Save clipboard history, apply text filters, queue multiple clippings, and sync across devices via iCloud.

Paw is a premium API client for macOS, originally developed by Lucky Marmot and later acquired by RapidAPI. It is now distributed as RapidAPI Client for Mac and offers a polished native interface for designing, testing, and documenting REST and GraphQL APIs.

Pentera is a commercial automated security validation platform that safely emulates real-world attacks across an organization to test security controls and expose risk. It is used by enterprise security teams to continuously validate their defenses and is offered as a SaaS product.

Recipe organizer, menu planner, and shopping list app. Create and edit recipes, import from popular sites, plan menus, scale recipes, and organize shopping lists by store layout.

Personal Capital (now Empower) is a free financial dashboard and portfolio tracking tool that aggregates all your accounts to show net worth, asset allocation, and retirement planning. It is widely used for tracking investment portfolios and analyzing fees.

Code-free automation and data extraction platform for LinkedIn, Twitter, and other websites. Offers pre-built automation recipes and cloud execution.

A full-featured EXIF viewer, editor, and remover for Android by Systweak Software. Handles batch editing and removal of EXIF, IPTC, and XMP metadata across images including RAW formats, with GPS editor and presets.

PhotoRoom is a commercial photo-editing app focused on instant background removal for product photos, portraits, and social content. The free tier includes basic cutouts; PhotoRoom Pro (paid subscription) unlocks batch editing, templates, high-resolution exports, and team workspaces.

Phrase, formerly PhraseApp and Memsource, is a cloud localization platform offering translation management, machine translation, quality assurance, and developer integrations on subscription tiers for teams and enterprises.

Open source alternatives to Pi-hole.

Open source alternatives to Pinboard.

Pingdom, part of SolarWinds Observability, is a cloud-based website monitoring and performance optimization tool that helps ensure websites remain fast, reliable, and accessible. It offers uptime monitoring from global locations, page speed testing, transaction simulations, and real user monitoring (RUM) to track how visitors experience your site in real time. Alerts and detailed diagnostics help identify issues quickly, while visual reports and performance breakdowns make troubleshooting straightforward. Founded in 2005 in Sweden and acquired by SolarWinds in 2014, Pingdom has become a trusted choice for businesses of all sizes—thanks to its scalability, intuitive dashboards, and global infrastructure. Whether for a small project or an enterprise platform, Pingdom provides the insights and alerts needed to maintain an optimal user experience.

Pinterest is a proprietary visual discovery and image bookmarking platform where users curate ideas, images, and links into themed boards, often for inspiration, moodboards, and planning.

Pipedrive is a cloud-based sales CRM and pipeline management platform designed to help sales teams track deals and activities. Known for its visual pipeline view and ease of use, it is a popular choice for small to medium-sized businesses.

Plan to Eat is a meal planning service that lets you save recipes from anywhere, drag them onto a calendar, and auto-generate a shopping list grouped by aisle. It runs as a web app with a subscription, designed for households that want one shared meal plan.

Plane is a modern project management tool for software teams, offering issue tracking, cycles, modules, views, pages, and analytics in a single workspace. The commercial Plane Cloud adds enterprise features, support, and a managed hosting option.

Privacy-friendly, lightweight and open-source web analytics tool as a paid SaaS service.

Playwright is a browser automation framework by Microsoft for end-to-end testing and web scraping across Chromium, Firefox, and WebKit.

Open source alternatives to Plex.

Open source alternatives to Pocket.