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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.

Browserbase

BrowserbaseAI

Hosted headless browser infrastructure for agents

CompanyBrowserbase
Since2024
PricingFreemium

Browserbase runs the browsers so you do not have to. Sessions, proxies, captcha handling, and stealth configuration are managed, which removes the least interesting and most fragile part of building anything that scrapes or automates the web.

Zendesk

Zendesk

Ticketing and help desk for support organisations

CompanyZendesk
Since2007
PricingPaid

Zendesk is built for support as a function with headcount, shifts, and service level agreements, rather than for a founder answering email. Routing, macros, and SLA policies are the substance of it.

Alternative tointercom
Crowdin

Crowdin

Localisation management for software and content

CompanyCrowdin
Since2009
PricingFreemium

Crowdin coordinates the people, files, and machine translation involved in shipping a product in more than one language. Source strings sync from a repository, translators work in the web editor, and translated files come back on merge.

Uptime Kuma

Uptime KumaOpen

Self-hosted uptime monitoring with a clean status page

Stars76.4K
Commit4d ago
LicenseMIT

Uptime Kuma monitors HTTP endpoints, TCP ports, containers, and certificates, and notifies through almost a hundred channels. Setup is a container and a few minutes.

Alternative todatadog
Buffer

Buffer

Social media scheduling with a deliberately small surface

CompanyBuffer
Since2010
PricingFreemium

Buffer schedules posts and reports on them, and has resisted becoming a suite for over a decade. That restraint is why it stays usable for a one person marketing function.

Zapier

Zapier

Hosted automation connecting thousands of applications

CompanyZapier
Since2011
PricingFreemium

Zapier's moat is the integration catalogue. Almost anything with an API is already connected, maintained by someone else, and works without a developer, which is worth a great deal to teams with no engineering capacity to spare.

Hoppscotch

HoppscotchOpen

API client that runs in the browser and stays fast

Stars74.2K
Commit1d ago
LicenseMIT

Hoppscotch is an API client that opens in a tab. Requests, collections, environments, and history are all there, and it starts in the time a desktop client takes to check for updates.

Alternative topostman
Sentry

Sentry

Error tracking and performance monitoring for applications

CompanyFunctional Software
Since2012
PricingFreemium

Sentry is the tool most teams install first and remove last. An unhandled exception arrives with a stack trace, the release that introduced it, the users affected, and the breadcrumbs leading up to it.

Algolia

Algolia

Hosted search with millisecond responses and ranking control

CompanyAlgolia
Since2012
PricingFreemium

Algolia is search as a managed service, tuned so hard for latency that typing into a search box feels like filtering a local list. Typo tolerance, synonyms, and merchandising rules are all configurable without touching the index code.

Postman

Postman

API client and collaboration platform

CompanyPostman
Since2012
PricingFreemium

Postman is where most developers first poke at an API, and it grew from that into documentation, mock servers, monitoring, and team workspaces around shared collections.

Calendly

Calendly

Booking links that read your real availability

CompanyCalendly
Since2013
PricingFreemium

Calendly removed an email thread from every meeting anyone arranges with someone outside their company. Share a link, the other person picks from real availability, and both calendars update.

Zoom

Zoom

Video meetings that hold up on a bad connection

CompanyZoom Communications
Since2013
PricingFreemium

Zoom won on the least glamorous quality possible: calls connected, and kept working on poor networks when competitors did not. Everything else it has added sits on top of that reliability.

Contentful

Contentful

Headless content management delivered over APIs

CompanyContentful
Since2013
PricingFreemium

Contentful separated content from presentation properly and early. Editors work with structured content models, and any number of front ends consume the same entries through an API.

Syncthing

SyncthingOpen

Continuous file sync between your own devices only

Stars72.1K
Commit3d ago
LicenseMPL-2.0

Syncthing synchronises folders directly between devices with no server in the middle. There is no account, no storage quota, and no third party holding the data, because the data never leaves the set of machines you nominate.

Alternative todropbox
Grafana

GrafanaOpen

Dashboards over whatever data you already store

Stars71.2K
Commit8h ago
LicenseAGPL-3.0

Grafana is the visualisation layer that sits above other systems rather than a monitoring stack of its own. It queries Prometheus, Loki, PostgreSQL, ClickHouse, and dozens of other sources, and puts them on the same dashboard.

Alternative todatadog
AnyDesk

AnyDesk

Remote desktop access with very low latency

CompanyAnyDesk Software
Since2014
PricingFreemium

AnyDesk built its own codec for screen transport, and it shows: sessions over ordinary connections feel closer to local than most competitors manage. For support work where someone is watching you move their cursor, that latency difference matters.

Google Assistant

Google Assistant

Voice control for smart home devices and routines

CompanyGoogle
Since2016
PricingFree

Google Assistant is the voice layer most smart home hardware supports first. Routines, broadcast messages, and device groups work across a very wide range of manufacturers with minimal setup.

Vanta

Vanta

Compliance automation for SOC 2, ISO 27001, and friends

CompanyVanta
Since2018
PricingPaid

Vanta turned compliance from a consulting engagement into a software subscription. It connects to cloud accounts, identity providers, and code hosting, then continuously checks controls and collects the evidence an auditor will ask for.

Linear

Linear

Issue tracking built around speed and opinionated defaults

CompanyLinear
Since2019
PricingFreemium

Linear is fast in a way that changes behaviour. Keyboard navigation, instant sync, and a deliberately narrow feature set mean issues actually get filed, which is the hard part of any tracker.

CapCut

CapCut

Free video editor built for social formats

CompanyByteDance
Since2020
PricingFreemium

CapCut is free, capable, and shaped entirely around vertical video for social platforms. Auto captions, trend templates, and one-tap effects remove most of the craft barrier to publishing.

Confluence

Confluence

Enterprise wiki wired into Atlassian's tooling

CompanyAtlassian
Since2004
PricingFreemium

Confluence is where large organisations put documentation that has to outlive the people who wrote it. Spaces, permissions, page trees, and approval workflows are built for scale and governance rather than for speed.

Alternative tonotion
Gmail

Gmail

Google's email client and the inbox most people mean

CompanyGoogle
Since2004
PricingFreemium

Gmail's search is still the reason to use it. Conversation threading, effectively unlimited retention on paid plans, and spam filtering that most self-hosted setups cannot match make it the default even for people uncomfortable with the arrangement.

Screen Studio

Screen Studio

Screen recording with automatic zooms and polished motion

CompanyScreen Studio
Since2022
PricingPaid

Screen Studio produces product demos that look edited without anyone editing them. Cursor movement is smoothed, clicks trigger zooms, and the resulting motion reads as deliberate rather than as somebody's screen recording.

Alternative toloom
HubSpot

HubSpot

CRM with marketing and support attached

CompanyHubSpot
Since2006
PricingFreemium

HubSpot's free CRM is a genuine product rather than a trial, and that is the strategy: get the contact database in place, then sell the marketing, sales, and service hubs around it.

Alternative tosalesforce