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OpenSourceAlternatives

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All software

126 products in total: 53 OSI-approved open source, 2 source-available, 5 unresolved-license Projects, and 66 proprietary. Structural source=open URLs remain supported; use the license-policy filter for the canonical distinction.

New Relic

New Relic

Application performance monitoring with usage based pricing

CompanyNew Relic
Since2008
PricingFree

New Relic was the application performance monitoring product for a generation of web applications, and its repricing to per-user plus per-gigabyte was an explicit attempt to answer the complaint about host based billing.

Alternative todatadog
AFFiNE

AFFiNEOpen

Documents, whiteboard, and database in one canvas

Stars54.3K
Commit12h ago
LicenseMIT

AFFiNE puts a document editor and an infinite canvas over the same content. A page can be read as a document or arranged spatially as a whiteboard, and edits in one mode are edits in the other.

Alternative tonotionmiro
LastPass

LastPass

Browser-first password manager with a long history

CompanyLastPass
Since2008
PricingFreemium

LastPass popularised the browser based password manager and for years was the default recommendation for people moving off reused passwords.

Alternative to1password
SendGrid

SendGrid

Transactional and marketing email delivery

CompanyTwilio
Since2009
PricingFreemium

SendGrid handles the part of email nobody wants to own: reputation, authentication, bounce processing, and the endless negotiation with inbox providers about whether your mail is wanted.

Alternative totwilio
Okta

Okta

Workforce identity and access management for enterprises

CompanyOkta
Since2009
PricingPaid

Okta is aimed at employee identity rather than customer identity: single sign-on across hundreds of business applications, lifecycle provisioning tied to a HR system, and the access reviews auditors ask for.

Alternative toauth0
Meilisearch

MeilisearchOpen

Typo-tolerant search that is fast to run and fast to tune

Stars52.3K
Commit1d ago
LicenseMIT

Meilisearch is a search engine you can be productive with in an afternoon. Indexing is a POST, relevance is tuned through an ordered list of ranking rules, and results come back typo-tolerant by default.

Alternative toalgolia
Coolify

CoolifyOpen

Deploy applications to your own servers with one click

Stars48.9K
Commit8h ago
LicenseApache-2.0

Coolify is a deployment platform that runs on servers you already pay for. It builds from a Git repository, provisions databases, issues certificates, and handles rollbacks, without the per-instance pricing of a hosted platform.

Alternative tofirebase
Trello

Trello

Kanban boards simple enough that people actually use them

CompanyAtlassian
Since2011
PricingFreemium

Trello is a board, a list, and a card, and for a very long time that was all. The restraint is why it spread beyond software teams to weddings, house moves, and editorial calendars.

Alternative toasana
Google Drive

Google Drive

Storage and document collaboration inside Workspace

CompanyGoogle
Since2012
PricingPaid

Google Drive is storage with an office suite attached, and the suite is the reason most organisations are on it. Docs, Sheets, and Slides collaborate in real time well enough that the underlying file storage barely gets thought about.

Alternative todropbox
Vaultwarden

VaultwardenOpen

Lightweight password vault server for Bitwarden clients

Stars48.1K
Commit4d ago
LicenseAGPL-3.0

Vaultwarden reimplements the Bitwarden server API in Rust so that it runs comfortably on a Raspberry Pi or a small VPS, while the official Bitwarden desktop, mobile, and browser clients connect to it unchanged.

Alternative to1password
Amplitude

Amplitude

Product analytics with experimentation attached

CompanyAmplitude
Since2014
PricingFreemium

Amplitude covers similar ground to Mixpanel with a stronger pull towards experimentation and governance. Event taxonomies can be enforced, which matters once more than one team is instrumenting the same product.

monday.com

monday.com

Colourful work operating system for cross-functional teams

Companymonday.com
Since2014
PricingFreemium

monday.com presents work as configurable boards with strongly typed columns, then layers dashboards and automations on top. It is aimed at operations, marketing, and sales teams that want structure without a database.

Alternative toasana
Tidal

Tidal

Streaming aimed at audio quality and artist payout

CompanyBlock
Since2014
PricingPaid

Tidal competes on two things the larger services do not lead with: high resolution audio formats, and a payout model that directs a share of a subscription to the artists that subscriber actually listened to.

Alternative tospotify
Apple Photos

Apple Photos

Photo library synced through iCloud across Apple devices

CompanyApple
Since2015
PricingPaid

Apple Photos does most of its analysis on the device rather than in the cloud, so face grouping and object search work without the library being readable by the vendor. Sync happens through iCloud, and the library is a first party part of the operating system rather than an app you install.

Alternative togoogle photos
Discord

Discord

Voice, video, and text communities organised into servers

CompanyDiscord
Since2015
PricingFreemium

Discord was built for people who wanted to talk while doing something else, and that origin still shapes it. Persistent voice rooms you drop into, rather than scheduled calls, is a genuinely different model from workplace chat.

Alternative toslack
Apple Music

Apple Music

Music streaming with lossless audio and no free tier

CompanyApple
Since2015
PricingFreemium

Apple Music ships lossless and spatial audio at no extra cost, which is the clearest technical differentiator in the category. Editorial curation is stronger than the algorithmic competition; algorithmic discovery is weaker.

Alternative tospotify
YouTube Music

YouTube Music

Streaming backed by YouTube's catalogue of everything

CompanyGoogle
Since2015
PricingFreemium

YouTube Music reaches material no licensed catalogue contains: live sets, remixes, covers, and regional uploads that never had a commercial release. For anyone whose listening goes past the mainstream, that coverage is decisive.

Alternative tospotify
whisper.cpp

whisper.cppAIOpen

Speech recognition that runs anywhere, with no runtime

Stars43.2K
Commit1d ago
LicenseMIT

whisper.cpp is a C and C++ port of the Whisper speech recognition model with no Python dependency, quantised weights, and hardware acceleration across Apple Silicon, CUDA, and plain CPU.

Alternative towispr flow
Penpot

PenpotOpen

Design and prototyping built on open web standards

Stars42.2K
Commit21h ago
LicenseMPL-2.0

Penpot stores designs as SVG and uses CSS layout primitives - flex and grid - as its layout model, so what a designer builds maps onto what a developer implements rather than needing translation.

Alternative tofigma
Microsoft Teams

Microsoft Teams

Chat, calls, and files bundled into Microsoft 365

CompanyMicrosoft
Since2017
PricingFreemium

Teams wins on bundling rather than on craft. If an organisation already pays for Microsoft 365, Teams arrives at no additional cost with identity, files, and calendar already wired together.

Alternative toslack
Plane

PlaneOpen

Issue tracking and planning without per-seat pricing

Stars40.1K
Commit20h ago
LicenseAGPL-3.0

Plane covers the ground between a lightweight tracker and a full project suite: issues, cycles, modules, and roadmaps, with views that suit both engineers and the people asking them for dates.

Alternative tojiralinear
Novu

Novu

Multi-channel notification infrastructure for applications

Stars39.7K
Commit8h ago
LicenseUnknown

Novu takes the notification logic that usually ends up scattered across a codebase - which channel, which template, which quiet hours, which digest window - and puts it behind one API and one workflow editor.

Alternative totwiliomailchimp
Cal.com

Cal.comOpen

Scheduling infrastructure you can host and extend

Stars38.2K
Commit9h ago
LicenseAGPL-3.0

Cal.com covers the booking link case well, but its real distinction is that scheduling is exposed as infrastructure. Availability, event types, and bookings all have APIs, and the booking page can be embedded rather than linked.

Alternative tocalendly
Postiz

PostizOpen

Schedule and analyse posts across 30+ social networks

Stars35.3K
Commit8h ago
LicenseAGPL-3.0

Postiz is a self-hostable scheduler for teams that publish to many networks and do not want to pay per seat for the privilege. It covers planning, drafting, approval, and publishing, with AI assistance for turning one post into per-network variants.

Alternative tobuffer