README.md

Open source alternatives

List of open-source alternatives to everyday SaaS products.

Artificial intelligence chatbot/ LLM (ChatGPT alternatives):

Company	Website	GitHub stars
OpenAssistant	open-assistant.io
Leon	getleon.ai
ChatRWKV	twitter.com/BlinkDL_AI

AI code completion (Github CoPilot alternatives):

Company	Website	GitHub stars
FauxPilot	github.com/fauxpilot/fauxpilot/wiki
YouCompleteMe	ycm-core.github.io/ycmd

Team knowledge base (Notion alternatives):

Company	Website	GitHub stars
AppFlowy	appflowy.io
AFFiNE	affine.pro
docmost	docmost.com

Internal tools (Retool alternatives):

Company	Website	GitHub stars
Appsmith	appsmith.com
ToolJet	tooljet.com
Budibase	budibase.com
ILLA	illacloud.com
Windmill	windmill.dev
Openblocks	openblocks.dev
DashPress	dashpress.io

Web analytics (Google Analytics alternatives):

Company	Website	GitHub stars
Matomo	matomo.org
Umami	umami.is
Plausible	plausible.io
OpenWebAnalytics	openwebanalytics.com

Note-taking/ Knowledge management (Evernote alternatives):

Company	Website	GitHub stars
Joplin	joplinapp.org
Logseq	logseq.com
SiYuan	b3log.org/siyuan/en
Notesnook	notesnook.com

Company blogs/ newsletters (WordPress alternatives):

Company	Website	GitHub stars
Ghost	ghost.org

Blogging platform/ Personal website builder (Medium alternatives):

Company	Website	GitHub stars
WriteFreely	writefreely.org
btw	btw.so

Newsletters (ConvertKit alternatives):

Company	Website	GitHub stars
listmonk	listmonk.app

Static website generator:

Company	Website	GitHub stars
Hugo	gohugo.io
Jekyll	jekyllrb.com
Astro	astro.build
11ty	11ty.dev
Zola	getzola.org

Website builder (Wix, Strikingly, Webflow alternatives):

Company	Website	GitHub stars
Silex	silex.me
DoTenX	dotenx.com
Webstudio	webstudio.is

Icons (Noun Project alternatives):

Company	Website	GitHub stars
Font-Awesome	fontawesome.com
feather	feathericons.com
Tabler-Icons	tabler-icons.io
Bootstrap	icons.getbootstrap.com
RemixIcon	remixicon.com

Collaborative design tool (Figma alternatives):

Company	Website	GitHub stars
Penpot	penpot.app
Radix Primitives	radix-ui.com
Plasmic	plasmic.app
Quant-UX	quant-ux.com

Online forms (Typeform alternatives):

Company	Website	GitHub stars
Formbricks	formbricks.com

Session replay and analytics (Fullstory alternatives):

Company	Website	GitHub stars
highlight	highlight.io

Content Management System/ CMS (Contentful alternatives):

Company	Website	GitHub stars
Strapi	strapi.io
Payload	payloadcms.com
Webiny	webiny.com

Log management (Papertrail alternatives):

Company	Website	GitHub stars
Graylog	graylog.org

To-do app:

Company	Website	GitHub stars
super-productivity	super-productivity.com

Community management:

Company	Website	GitHub stars
Discourse	discourse.org
Flarum	flarum.org
crowd.dev	crowd.dev

Kanban board (Trello alternatives):

Company	Website	GitHub stars
WeKan	wekan.github.io
Focalboard	focalboard.com
Kanboard	kanboard.org
Planka	planka.app

Social network/ Micro-blogging (Twitter alternatives):

Company	Website	GitHub stars
Mastodon	joinmastodon.org
HumHub	humhub.com
Elgg	elgg.org

Ticket management (Zendesk, Freshdesk alternatives):

Company	Website	GitHub stars
Zammad	zammad.com
Peppermint	peppermint.sh

Scheduling tool (Calendly alternatives):

Company	Website	GitHub stars
Cal.com	cal.com

Smart spreadsheet (Airtable alternatives):

Company	Website	GitHub stars
NocoDB	nocodb.com
Luckysheet	dream-num.github.io/LuckysheetDocs
APITable	apitable.com
Grist	getgrist.com

Team communication (Slack, Discord alternatives):

Company	Website	GitHub stars
Rocket.chat	rocket.chat
Mattermost	mattermost.com
Zulip	zulip.com
Element	element.io
Spacebar	spacebar.chat
RelatedChat	relatedcode.com

Live chat (Intercom alternatives):

Company	Website	GitHub stars
Chatwoot	chatwoot.com

User authentication (Auth0 alternatives):

Company	Website	GitHub stars
Keycloak	keycloak.org
SuperTokens	supertokens.com
Logto	logto.io

Digital search experience (Algolia alternatives):

Company	Website	GitHub stars
Typesense	typesense.org

Backend-as-a-Service (Firebase alternatives):

Company	Website	GitHub stars
Supabase	supabase.com
Appwrite	appwrite.io
Nhost	nhost.io

Customer data platform/ CDP (Segment alternatives):

Company	Website	GitHub stars
Jitsu	jitsu.com

Link shortener (Bitly alternatives):

Company	Website	GitHub stars
Dub	dub.sh

Online store builder (Shopify alternatives):

Company	Website	GitHub stars
Medusa	medusajs.com
Vue Storefront	vuestorefront.io
Sylius	sylius.com
Presta	prestashop-project.org
Bagisto	bagisto.com
Litekart	litekart.in

Password manager (1Password alternatives):

Company	Website	GitHub stars
Bitwarden	bitwarden.com
Passbolt	passbolt.com
Padloc	padloc.app

Email delivery (Mailgun, SendGrid alternatives):

Company	Website	GitHub stars
Postal	docs.postalserver.io

Usage-based billing (Stripe, Chargebee alternatives):

Company	Website	GitHub stars
Lago	getlago.com

File uploader:

Company	Website	GitHub stars
Uppy	uppy.io

Notification infrastructure:

Company	Website	GitHub stars
Novu	novu.co
ntfy	ntfy.sh
Gotify	gotify.net
Apprise	hub.docker.com/r/caronc/apprise

API development (Postman alternatives):

Company	Website	GitHub stars
hoppscotch	hoppscotch.io
Insomnia	insomnia.rest
Firecamp	firecamp.dev

Programmatic videos:

Company	Website	GitHub stars
Remotion	remotion.dev

Data warehouse (Snowflake alternatives):

Company	Website	GitHub stars
Databend	databend.rs

Annotation:

Company	Website	GitHub stars
doccano	doccano.herokuapp.com

Feature management/ Feature flag:

Company	Website	GitHub stars
Unleash	getunleash.io
Flagsmith	flagsmith.com
Flagr	openflagr.github.io/flagr/
FeatBit	featbit.co

Product analytics (Mixpanel, Amptitude alternatives):

Company	Website	GitHub stars
PostHog	posthog.com

Video conferencing (Google Meet, Skype alternatives):

Company	Website	GitHub stars
Jitsi Meet	jitsi.org
Element Call	call.element.io

Personal cloud (Dropbox alternatives):

Company	Website	GitHub stars
Nextcloud	nextcloud.com

Business intelligence (Tableau, Looker, Power BI alternatives):

Company	Website	GitHub stars
Metabase	metabase.com

Platform-as-a-Service/ PaaS (Heroku, Netlify, Vercel alternatives):

Company	Website	GitHub stars
Dokku	dokku.com
CapRover	caprover.com
Coolify	coolify.io
Kubero	kubero.dev

Unified Communication Platform & Telephony API (Twilio alternatives):

Company	Website	GitHub stars
Fonoster	fonoster.com

Bug tracking/ Error tracking (Sentry alternatives):

Company	Website	GitHub stars
Bugzilla	bugzilla.org

Invoicing:

Company	Website	GitHub stars
Invoice Ninja	invoiceninja.com
Crater	crater.financial
SolidInvoice	solidinvoice.co

Graph database:

Company	Website	GitHub stars
JanusGraph	janusgraph.org
Memgraph	memgraph.com

Vector database:

Company	Website	GitHub stars
Milvus	milvus.io
Weaviate	weaviate.io
activeloopai/deeplake	activeloop.ai
CozoDB	cozodb.org

Time-series database:

Company	Website	GitHub stars
Prometheus	prometheus.io
QuestDB	questdb.io
OpenTSDB	opentsdb.net
KairosDB	kairosdb.github.io

Document signing (DocuSign alternatives):

Company	Website	GitHub stars
Documenso	documenso.com

Workflow automation (Zapier alternatives):

Company	Website	GitHub stars
Automatisch	automatisch.io
Activepieces	activepieces.com

Project Management (Asana, JIRA alternatives):

Company	Website	GitHub stars
Plane	Plane.so
Leantime	leantime.io

Time Tracking (Toggl, Clockify alternatives)

Company	Website	GitHub stars
Kimai	www.kimai.org
solidtime	solidtime.io

Personal finance (Empower Personal Wealth alternatives):

Company	Website	GitHub stars
Ghostfolio	Ghostfol.io
Firefly III	firefly-iii.org

CRM (Salesforce, Hubspot alternatives):

Company	Website	GitHub stars
Twenty	Twenty.com

Integration Platform (Tray.io, Merge.dev alternatives)

Company	Website	GitHub stars
Revert	revert.dev

Online Survey Platform (SurveyMonkey, Qualtrics alternatives)

Company	Website	GitHub stars
LimeSurvey	limesurvey.org

Criteria

1. Product is open-source and repo is actively being maintained.
2. It is a product (not a library) and ideally has a popular closed-source alternative.
3. Repo has at least 100 stars on GitHub.

Contributing

Looking for contributors to add missing startups/ projects. Please submit a PR (the products are listed in descending order by number of GitHub stars) or feel free to DM @deeptivchopra.