RunaCapital/awesome-oss-alternatives

Awesome list of open-source startup alternatives to well-known SaaS products 🚀

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updated Sep 3, 2025

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Awesome open-source alternatives to SaaS

Awesome list of open-source startup alternatives to established SaaS products. Maintained by folks at

Also checkout our ROSS index: fastest-growing open-source startups, every quarter.

Criteria

Open-source company is added to the list if:

Its product is strongly based on an open-source repo
It has a well-known closed-source competitor, solving a similar business problem
It is a private for-profit company, founded in the last 10 years
Its repo has 100+ stars on GitHub

Things change really fast in the startup world, so this list can neither be fully complete, nor 100% up to date.

Don't hesitate to contribute and add new startups. Let's build the most comprehensive list together.

Any questions or suggestions? Feel free to DM project maintainer @garrrikkotua

Startup List

All startups in the list are sorted by categories and sorted in alphabetical order. If you click on the stars badge you will get to the product's repo. Have a good search!

Category	Company	Description	GitHub Stars	Alternative to
API Gateway	Apache APISIX	Cloud Native API Gateway under the Apache Software Foundation	<a href=https://github.com/apache/apisix>	apigee
API Platform	Firecamp	DX first open-source API devtool	<a href=https://github.com/firecamp-dev/firecamp>	Postman
API Platform	Fusio	API management platform	<a href=https://github.com/apioo/fusio>	Postman
API Platform	Hoppscotch	API development ecosystem	<a href=https://github.com/hoppscotch/hoppscotch>	Postman
API Platform	Keploy	e2e Testing and Data Mocking	<a href=https://github.com/keploy/keploy>	Smartbear, Newman
API Platform	Step CI	API Testing and Monitoring	<a href=https://github.com/stepci/stepci>	Checkly, Postman
Auth & SSO	BoxyHQ	Enterprise Readiness made simple	<a href=https://github.com/boxyhq/jackson>	Auth0
Auth & SSO	Cerbos	Granular access control	<a href=https://github.com/cerbos/cerbos>	Okta, Auth0
Auth & SSO	FusionAuth	User authentication and session management framework	<a href=https://github.com/FusionAuth/fusionauth-containers>	Okta, Auth0
Auth & SSO	Hanko	Passkey-first authentication framework	<a href=https://github.com/teamhanko/hanko>	Okta, Auth0
Auth & SSO	Keycloak	User authentication and session management framework	<a href=https://github.com/keycloak/keycloak>	Okta, Auth0
Auth & SSO	OPAL (Permit.io)	Authorization administration framework (Open Policy)	<a href=https://github.com/permitio/opal>	Okta, Auth0
Auth & SSO	Ory	Identity platform	<a href=https://github.com/ory/kratos>	Okta, Auth0
Auth & SSO	Oso	Authorization building framework	<a href=https://github.com/osohq/oso>	Okta, Auth0
Auth & SSO	Supertokens	User authentication and session management framework	<a href=https://github.com/supertokens/supertokens-core>	Okta, Auth0
Auth & SSO	Warrant	Authorization and access control as a service	<a href=https://github.com/warrant-dev/warrant>	Okta, Auth0
Auth & SSO	Zitadel	User authentication and session management framework	<a href=https://github.com/zitadel/zitadel>	Okta, Auth0
Backend as a service	AceBase	Backend server with REST APIs to manage core backend needs	<a href=https://github.com/appy-one/acebase>	Firebase
Backend as a service	Amplication	Backend server with REST and GraphQL APIs to manage core backend needs	<a href=https://github.com/amplication/amplication>	Firebase
Backend as a service	Appwrite	Backend server with REST APIs to manage core backend needs	<a href=https://github.com/appwrite/appwrite>	Firebase
Backend as a service	CASE	Lightweight Backend-as-a-Service with essential features	<a href=https://github.com/casejs/case>	Firebase
Backend as a service	Encore	Backend Development Engine for cloud-based apps, APIs, and distributed systems	<a href=https://github.com/encoredev/encore>	Firebase
Backend as a service	Kuzzle	Backend server with REST APIs to manage core backend needs	<a href=https://github.com/kuzzleio/kuzzle>	Firebase
Backend as a service	Nhost	Backend server with GraphQL	<a href=https://github.com/nhost/nhost>	Firebase
Backend as a service	PocketBase	Backend server with REST APIs to manage core backend needs	<a href=https://github.com/pocketbase/pocketbase>	Firebase
Backend as a service	Supabase	Backend server with REST APIs to manage core backend needs	<a href=https://github.com/supabase/supabase>	Firebase
Business Intelligence	Metabase	Business intelligence software	<a href=https://github.com/metabase/metabase>	Tableau, Power BI, DataStudio
Business Intelligence	Preset	Modern BI platform powered by Apache Superset	<a href=https://github.com/apache/superset>	PowerBI, Tableau, Mode Analytics
CMS	Builder	Drag and drop page builder and CMS	<a href=https://github.com/builderio/builder>	Contentful
CMS	Concrete	CMS for teams	<a href=https://github.com/concrete5/concrete5>	Contentful
CMS	Decap CMS	Git-based CMS for static site generators	<a href=https://github.com/decaporg/decap-cms>	Contentful
CMS	Directus	Data platform which wraps any database with an intuitive app	<a href=https://github.com/directus/directus>	Contentful
CMS	Ghost	Headless Node.js publishing platform	<a href=https://github.com/tryghost/ghost>	Medium, Substack
CMS	Plasmic	The headless page builder for singe-page frameworks	<a href=https://github.com/plasmicapp/plasmic>	Contentful
CMS	Strapi	Node.js Headless CMS to build customisable APIs	<a href=https://github.com/strapi/strapi>	Contentful
CMS	Sulu	Modern Symfony based CMS	<a href=https://github.com/sulu/sulu>	Contentful
CMS	Tina	Visual editor for React websites	<a href=https://github.com/tinacms/tinacms>	Contentful
CMS	Webiny	Enterprise serverless CMS	<a href=https://github.com/webiny/webiny-js>	Contentful
Cloud Data Warehouse	Databend	Elastic and Workload-Aware Modern Cloud Data Warehouse	<a href=https://github.com/datafuselabs/databend>	Snowflake
Cloud Development Environment	Gitpod	Automated provisioning of cloud development environments with multiple git providers & IDEs	<a href=https://github.com/gitpod-io/gitpod>	Codespaces
Cloud Storage	Minio	S3 compatible object storage	<a href=https://github.com/minio/minio>	Amazon S3
Cloud Storage	Storj	Decentralized cloud storage	<a href=https://github.com/storj/storj>	Amazon S3
Cloud-Native Application Protection Platform	Deepfence ThreatMapper	Apache v2, powerful runtime vulnerability and compliance scanner for kubernetes, virtual machines, cloud and serverless.	<a href=https://github.com/deepfence/ThreatMapper>	Palo Alto Prisma
Communication	Fonoster	APIs for SMS, voice and video	<a href=https://github.com/fonoster/fonoster>	Twilio
Communication	Novu	Components and APIs for email, sms, direct and push	<a href=https://github.com/novuhq/novu>	Courier, MagicBell, Knock
Community Platform	crowd.dev	Suite of community and data tools built to unlock community-led growth for your organization	<a href=https://github.com/CrowdDotDev/crowd.dev>	Orbit, Common Room, Commsor
Customer Data Platform	Jitsu	Fully-scriptable data ingestion engine for modern data teams	<a href=https://github.com/jitsucom/jitsu>	Segment
Customer Data Platform	Rudderstack	Customer data platform for developers	<a href=https://github.com/rudderlabs/rudder-server>	Segment
Customer Data Platform	Tracardi	Customer Data Platform with Consumer Journey automation engine	<a href=https://github.com/tracardi/tracardi>	Segment, Zapier
Customer Engagement	Chaskiq	Live chat widget	<a href=https://github.com/chaskiq/chaskiq>	Intercom, Zendesk
Customer Engagement	Chatwoot	Live chat widget	<a href=https://github.com/chatwoot/chatwoot>	Intercom, Zendesk
Customer Engagement	Papercups	Live chat widget	<a href=https://github.com/papercups-io/papercups>	Intercom, Zendesk
Cybersecurity	CloudQuery	Assess, audit, and evaluate the configurations of your cloud assets.	<a href=https://github.com/cloudquery/cloudquery>	AWS Config, GCP Cloud Asset Inventory, AWS GuardDuty
Cybersecurity	CrowdSec	Collaborative IPS able to analyze visitor behavior and to provide an adapted response to all kinds of attacks.	<a href=https://github.com/crowdsecurity/crowdsec>	GreyNoise
Cybersecurity	Faraday	Open Source Vulnerability Management and Orchestration Platform	<a href=https://github.com/infobyte/faraday>	Plextrac, Vulcan
Cybersecurity	Firezone	VPN Server & Firewall for teams	<a href=https://github.com/firezone/firezone>	OpenVPN Access Server
Cybersecurity	Gravitl	WireGuard virtual networking platform (VPN)	<a href=https://github.com/gravitl/netmaker>	Tailscale, OpenVPN
Cybersecurity	LunaTrace	Dependency Vulnerability Scanner and SBOM Inventory	<a href=https://github.com/lunasec-io/lunasec>	GitHub Dependabot, Snyk.io, SonaType Nexus
Cybersecurity	Matano	Open source cloud-native security lake platform (SIEM alternative) for threat hunting, detection & response, and cybersecurity analytics at petabyte scale on AWS	<a href=https://github.com/matanolabs/matano>	Splunk, Elastic Cloud
Cybersecurity	NetBird	Zero Configuration Mesh VPN for Business	<a href=https://github.com/netbirdio/netbird>	Tailscale, OpenVPN
Cybersecurity	Nuclei	Vulnerability scanner based on simple YAML based DSL	<a href=https://github.com/projectdiscovery/nuclei>	Tenable Nessus
Design	21st.dev	The NPM for Design Engineers	<a href=https://github.com/rorkai/21st>	Landingfolio
Design	Modulz	Code-based tool for designing and prototyping	<a href=https://github.com/radix-ui/primitives>	Figma
Design	Penpot	Design & prototyping platform	<a href=https://github.com/penpot/penpot>	Figma
Digital Signature	DocuSeal	Digital Signing Infrastructure	<a href=https://github.com/docusealco/docuseal>	DocuSign
Digital Signature	Documenso	Digital Signing Infrastructure	<a href=https://github.com/documenso/documenso>	DocuSign
Digital Signature	LibreSign	Digital document signer	<a href=https://github.com/LibreSign/libresign>	DocuSign
E-commerce	Bagisto	Headless e-commerce platform	<a href=https://github.com/bagisto/bagisto>	Shopify, Ecwid
E-commerce	Medusa	Headless e-commerce platform	<a href=https://github.com/medusajs/medusa>	Shopify, Ecwid
E-commerce	Saleor	Headless e-commerce platform	<a href=https://github.com/saleor/saleor>	Shopify, Ecwid
E-commerce	Shuup	Headless e-commerce platform	<a href=https://github.com/shuup/shuup>	Shopify, Ecwid
E-commerce	Sylius	Headless e-commerce platform	<a href=https://github.com/sylius/sylius>	Shopify, Ecwid
E-commerce	Vendure	Headless e-commerce platform	<a href=https://github.com/vendure-ecommerce/vendure>	Shopify, Ecwid
E-commerce	Vue Storefront	Frontend for e-commerce platform	<a href=https://github.com/vuestorefront/vue-storefront>	Shogun
ELT / ETL	Airbyte	Data integration platform	<a href=https://github.com/airbytehq/airbyte>	Fivetran
ELT / ETL	Benthos	Data streaming processor with yaml-driven pipeline configuration	<a href=https://github.com/benthosdev/benthos>	Fivetran
ELT / ETL	Dagster	Orchestration platform for data assets	<a href=https://github.com/dagster-io/dagster>	Fivetran
ELT / ETL	Kestra	orchestration and scheduling platform	<a href=https://github.com/kestra-io/kestra>	Fivetran
ELT / ETL	Orchest	No-code data pipelines builder	<a href=https://github.com/orchest/orchest>	Fivetran
ELT / ETL	Prefect	Data orchestration platform for a modern data stack	<a href=https://github.com/prefecthq/prefect>	Fivetran
ELT / ETL	Selefra	An open-source policy-as-code software that provides analytics for multi-cloud and SaaS.	<a href=https://github.com/selefra/selefra>	Fivetran
ERP	DoliCloud	Business management suite (ERP and CRM)	<a href=https://github.com/Dolibarr/dolibarr>	Oracle Fusion ERP Cloud,Odoo,Microsoft Dynamics
ERP	ERPNext	Agile, modern, module based Business management suite	<a href=https://github.com/frappe/erpnext>	SAP Business One, Odoo
Email marketing	Keila	Email newsletter tool	<a href=https://github.com/pentacent/keila>	Mailchimp, Sendinblue
Enterprise Search	AppBase	Search UI components for React and Vue	<a href=https://github.com/appbaseio/reactivesearch>	Algolia
Enterprise Search	Jina.ai	Neural search framework for 𝙖𝙣𝙮 kind of data (including images)	<a href=https://github.com/jina-ai/jina>	Algolia
Enterprise Search	Manticore Search	Easy to use open source fast database for search	<a href=https://github.com/manticoresoftware/manticoresearch/>	Elastic Cloud
Enterprise Search	Meilisearch	Typo tolerant search engine	<a href=https://github.com/meilisearch/meilisearch>	Algolia
Enterprise Search	Qdrant	Vector similarity search engine with extended filtering support	<a href=https://github.com/qdrant/qdrant>	Google Vertex AI, Algolia
Enterprise Search	SeMI's Weaviate	Real-time vector search engine	<a href=https://github.com/semi-technologies/weaviate>	Google Vertex AI, Algolia
Enterprise Search	TypeSense	Typo tolerant fuzzy search engine	<a href=https://github.com/typesense/typesense>	Algolia
Enterprise Search	Zilliz's Milvus	Vector database for AI applications	<a href=https://github.com/milvus-io/milvus>	Google Vertex AI
Enterprise Search	Zinc Labs's Zinc	Cloud native full text search	<a href=https://github.com/prabhatsharma/zinc>	Elastic Cloud
Enterprise Search	deepset	NLP platform to build enterprise-grade semantic search	<a href=https://github.com/deepset-ai/haystack>	AWS Kendra, QnA Maker
Feature flag and toggle management	FlagSmith	Feature Flag & Remote Config Service	<a href=https://github.com/Flagsmith/flagsmith>	LaunchDarkly
Feature flag and toggle management	GrowthBook	Feature flags and A/B testing	<a href=https://github.com/growthbook/growthbook>	LaunchDarkly
Feature flag and toggle management	Unleash	Feature flags platform	<a href=https://github.com/Unleash/unleash>	LaunchDarkly
File Hosting	Filestash	A file manager that let you manage your data anywhere it is located	<a href=https://github.com/mickael-kerjean/filestash>	Dropbox, Google Drive
File Hosting	Nextcloud	A personal cloud which runs on your own server	<a href=https://github.com/nextcloud/server>	Dropbox, Google Drive
File Hosting	Owncloud	A personal cloud which runs on your own server	<a href=https://github.com/owncloud/core>	Dropbox, Google Drive
File Hosting	Spacedrive	Cross-platform file manager, powered by a virtual distributed filesystem (VDFS) written in Rust	<a href=https://github.com/spacedriveapp/spacedrive>	Dropbox, Google Drive
Financial Service	Lago	Open Source Billing API	<a href=https://github.com/getlago/lago>	Stripe Billing, Chargebee
Financial Service	OpenBB Terminal	Investment research for everyone	<a href=https://github.com/GamestonkTerminal/GamestonkTerminal>	Bloomberg
Form Building	FormKit	A software to help build attractive forms	<a href=https://github.com/formkit/formkit>	Vueform,Typeform
Form Building	Formbricks	Build forms and receive & manage submission data in one platform	<a href=https://github.com/formbricks/formbricks>	Typeform, Google Forms, React Hook Form
Form Building	Formio	A Form and Data Management Platform for Progressive Web Applications	<a href=https://github.com/formio/formio>	Vueform,Typeform
Forum Software	Discourse	A platform for community discussion	<a href=https://github.com/discourse/discourse>	Tribe, Circle
Forum Software	Vanilla	A platform for community discussion	<a href=https://github.com/vanilla/vanilla>	Tribe, Circle
Graph database	ArangoDB	Graph database and document store	<a href=https://github.com/arangodb/arangodb>	TigerGraph, Amazon Neptune
Graph database	Memgraph	In-memory graph database	<a href=https://github.com/memgraph/memgraph>	TigerGraph, Amazon Neptune
Graph database	Neo4j	Graph database platform	<a href=https://github.com/neo4j/neo4j>	TigerGraph, Amazon Neptune
Graph database	TerminusDB	Knowledge graph and document store	<a href=https://github.com/terminusdb/terminusdb>	TigerGraph, Amazon Neptune
Helpdesk Solution	Peppermint	Ticket Management & Helpdesk system	<a href=https://github.com/Peppermint-Lab/peppermint>	Zendesk
Helpdesk Solution	UVDesk	Ticket Management & Helpdesk system	<a href=https://github.com/uvdesk/community-skeleton>	Zendesk
Internal Tools	AppSmith	Low-code platform for internal tools	<a href=https://github.com/appsmithorg/appsmith>	Retool
Internal Tools	Budibase	Low-code platform for internal tools	<a href=https://github.com/Budibase/budibase>	Retool
Internal Tools	ILLA Cloud	Low-code platform for developers to build internal tools in minutes.	<a href=https://github.com/illacloud/illa-builder>	Retool
Internal Tools	Lowdefy	YAML-based low-code platform for internal tools	<a href=https://github.com/lowdefy/lowdefy>	Retool
Internal Tools	Tooljet	Low-code framework for internal tools	<a href=https://github.com/tooljet/tooljet>	Retool
Internal Tools	Windmill	Company-wide apps and automations from minimal python or typescript scripts	<a href=https://github.com/windmill-labs/windmill>	Retool
Localization (i18n)	Tolgee	Developer & translator friendly web-based localization platform	<a href=https://github.com/tolgee/tolgee-platform>	Lokalise, Transifex, Crowdin, POEditor
Localization (i18n)	inlang	Developer-first localization infrastructure built on git	<a href=https://github.com/inlang/inlang>	Lokalise, Transifex, Crowdin, POEditor
Log Management	Graylog	Log management platform	<a href=https://github.com/Graylog2/graylog2-server>	Splunk
Log Management	Quickwit	Cloud-native log management & analytics	<a href=https://github.com/quickwit-oss/quickwit>	Elastic Cloud
ML Ops	Cortex	Production infrastructure for machine learning	<a href=https://github.com/cortexlabs/cortex>	AWS SageMaker
ML Ops	Metarank	AutoML style personalized ranking	<a href=https://github.com/metarank/metarank>	AWS Personalize, Tecton
ML Ops	MindsDB	In-database machine learning platform	<a href=https://github.com/mindsdb/mindsdb>	BigQuery ML
ML Ops	Ploomber	YAML-based pipeline builder for ML models	<a href=https://github.com/ploomber/ploomber>	AWS SageMaker
ML Ops	Seldon	Deployment & monitoring for machine learning at scale	<a href=https://github.com/SeldonIO/seldon-core>	AWS SageMaker, Google Vertex AI
ML Ops	Zilliz's Towhee	Platform for generating embedding vectors	<a href=https://github.com/towhee-io/towhee>	AWS SageMaker
Marketing SaaS	Dub	Open-source Bitly Alternative with built-in analytics	<a href=https://github.com/steven-tey/dub>	Bitly
Messaging	Element	Enterprise communication platform	<a href=https://github.com/vector-im/element-web>	Slack
Messaging	Mattermost	Enterprise communication platform for developers	<a href=https://github.com/mattermost/mattermost-server>	Slack
Messaging	Rocket.chat	Enterprise communication platform	<a href=https://github.com/RocketChat/Rocket.Chat>	Slack
Messaging	Tinode	General instant messaging	<a href=https://github.com/tinode/chat>	WhatsApp, Telegram
Messaging	Zulip	Team chat	<a href=https://github.com/zulip/zulip>	Slack
Metrics store	Cube.js	Headless business intelligence suite	<a href=https://github.com/cube-js/cube.js>	Looker
Metrics store	Evidence	Lightweight BI using SQL and markdown	<a href=https://github.com/evidence-dev/evidence>	Looker
Metrics store	LightDash	Low-code metrics layer, alternative to Looker	<a href=https://github.com/lightdash/lightdash>	Looker
Metrics store	MLCraft	Low-code metrics layer, alternative to Looker	<a href=https://github.com/mlcraft-io/mlcraft>	Looker
Metrics store	MetriQL	Headless business intelligence suite	<a href=https://github.com/metriql/metriql>	Looker
No-code database	Baserow	No-code database and Airtable alternative	<a href=https://gitlab.com/bramw/baserow>	AirTable
No-code database	NocoDB	No-code database and Airtable alternative	<a href=https://github.com/nocodb/nocodb>	AirTable
No-code database	Rowy	Extendable Airtable-like spreadsheet UI for databases	<a href=https://github.com/rowyio/rowy>	AirTable
No-code database	Totum	Business database for non-programmers	<a href=https://github.com/totumonline/totum-mit>	AirTable
Notetaking	AppFlowy	Open-source alternative to Notion	<a href=https://github.com/AppFlowy-IO/appflowy>	Notion
Notetaking	Athens Research	Knowledge graph for research and notetaking	<a href=https://github.com/athensresearch/athens>	Roam Research
Notetaking	Bangle.io	A rich note note taking web app that works on top of your locally saved Markdown files	<a href=https://github.com/bangle-io/bangle-io>	Notion
Notetaking	Boost Note	Collaborative workspace for developer teams	<a href=https://github.com/BoostIO/BoostNote-App>	Notion
Notetaking	Dendron	Knowledge base plugin for VS Code	<a href=https://github.com/dendronhq/dendron>	Roam Research
Notetaking	Joplin	Secure, Cross-platform, Open-Source Markdown Note Taking App	<a href=https://github.com/laurent22/joplin>	Evernote, Onenote, Roam Research
Notetaking	Logseq	Knowledge base manager	<a href=https://github.com/logseq/logseq>	Roam Research
Notetaking	Notabase	Powerful and easy-to-use note-taking app for networked thinking	<a href=https://github.com/churichard/notabase>	Notion, Roam Research
Notetaking	Notesnook	A fully open source & end-to-end encrypted note taking alternative to Evernote.	<a href=https://github.com/streetwriters/notesnook>	Evernote, OneNote
Notetaking	Outline	Wiki and knowledge base	<a href=https://github.com/outline/outline>	Notion
Notetaking	Trilium.cc	Personal knowledge base	<a href=https://github.com/zadam/trilium>	Evernote, Onenote
Observability and monitoring	Chaos Genius	ML powered analytics engine for outlier/anomaly detection and root cause analysis	<a href=https://github.com/chaos-genius/chaos_genius>	AWS Lookout, Anodot, Sisu Data, Outlier
Observability and monitoring	Grafana	Observability and data visualization platform	<a href=https://github.com/grafana/grafana>	DataDog, NewRelic
Observability and monitoring	Netdata	Application monitoring and observability platform	<a href=https://github.com/netdata/netdata>	DataDog, NewRelic
Observability and monitoring	OpenStatus	Synthetic monitoring platform	<a href=https://github.com/openstatusHQ/openstatus>	DataDog, NewRelic
Observability and monitoring	Sentry	Application monitoring with a focus on error reporting	<a href=https://github.com/getsentry/sentry>	DataDog, NewRelic
Observability and monitoring	Signoz	Application monitoring and observability platform	<a href=https://github.com/signoz/signoz>	DataDog, NewRelic
Observability and monitoring	Uptrace	Application monitoring and observability platform	<a href=https://github.com/uptrace/uptrace>	DataDog, NewRelic
Observability and monitoring	VictoriaMetrics	Application monitoring and observability platform	<a href=https://github.com/VictoriaMetrics/VictoriaMetrics>	DataDog, NewRelic
Password manager	BitWarden	Password manager for teams and individuals	<a href=https://github.com/bitwarden/server>	1Password
Password manager	Padloc	Password manager for teams and individuals	<a href=https://github.com/padloc/padloc>	1Password
Password manager	Passbolt	Password manager for teams and individuals	<a href=https://github.com/passbolt/passbolt_api>	1Password
Platform as a service	Coolify	Self-hostable Heroku alternative	<a href=https://github.com/coollabsio/coolify>	Heroku
Platform as a service	Dokku	An open source PAAS alternative to Heroku	<a href=https://github.com/dokku/dokku>	Heroku
Platform as a service	Otomi	Self-hosted PaaS for Kubernetes	<a href=https://github.com/redkubes/otomi-core>	Heroku
Platform as a service	Porter	Kubernetes powered PaaS that runs in your own cloud	<a href=https://github.com/porter-dev/porter>	Heroku
Platform as a service	Pulumi	Universal Infrastructure as Code	<a href=https://github.com/pulumi/pulumi>	Heroku
Platform as a service	Qovery	Kubernetes powered PaaS that runs in your own cloud	<a href=https://github.com/Qovery/engine>	Heroku
Platform as a service	Space Cloud	Serverless cloud deployment platform	<a href=https://github.com/spacecloud-io/space-cloud>	Heroku
Platform as a service	dyrector.io	Simplify container delivery without vendor lock	<a href=https://github.com/dyrector-io/dyrectorio>	Heroku
Product Analytics	Objectiv	Product analytics infrastructure	<a href=https://github.com/objectiv/objectiv-analytics>	Google Analytics, Amplitude, Mixpanel
Product Analytics	PostHog	Product analytics platform	<a href=https://github.com/PostHog/posthog>	Amplitude, MixPanel
Product Analytics	Trench	Open source analytics infrastructure	<a href=https://github.com/FrigadeHQ/trench>	Segment, Google Analytics, Amplitude
Project Management	Focalboard	Alternative to Trello, Notion, and Asana	<a href=https://github.com/mattermost/focalboard>	Trello, Notion, Asana
Project Management	OpenProject	Project management software	<a href=https://github.com/opf/openproject>	Asana, Trello
Project Management	Plane	Alternative to Linear, JIRA, Trello and Height	<a href=https://github.com/makeplane/plane>	Linear, JIRA, Trello, Height
Project Management	Taiga	Project management software	<a href=https://github.com/kaleidos-ventures/taiga-docker>	Asana, Trello, Jira
Project Management	Vikunja	The to-do app to organize your next project.	<a href=https://github.com/go-vikunja/api>	Todoist, Trello, Asana
Relational database	PingCAP	NewSQL database that supports HTAP workloads	<a href=https://github.com/pingcap/tidb>	Amazon Aurora, Google Cloud Spanner
Relational database	Yugabyte	High-performance distributed SQL database	<a href=https://github.com/yugabyte/yugabyte-db>	Amazon Aurora, Google Cloud Spanner
Remote Desktop Application	RustDesk	Open source virtual / remote desktop infrastructure for everyone	<a href=https://github.com/rustdesk/rustdesk>	TeamViewer
Reverse ETL	Castled	Data synchronization framework focused on external apps	<a href=https://github.com/castledio/castled>	Hightouch, NewRelic
Reverse ETL	Grouparoo	Data synchronization framework	<a href=https://github.com/grouparoo/grouparoo>	Hightouch
Robotic Process Automation (RPA)	RoboCorp	Set of tooling that allows to create automation packages	<a href=https://github.com/robocorp/rcc>	UiPath
Scheduling	Cal.com	Scheduling infrastructure, alternative to Calendly	<a href=https://github.com/calendso/calendso>	Calendly
Session replay software	OpenReplay	Session replay stack for developers	<a href=https://github.com/openreplay/openreplay>	LogRocket, FullStory
Social Media	Postiz	Self-hosted social media scheduling tool	<a href=https://github.com/gitroomhq/postiz-app>	Buffer, Hootsuite
Streaming	Glimesh	Live streaming platform	<a href=https://github.com/glimesh/glimesh.tv>	Twitch
Surveys	LimeSurvey	Online survey platform	<a href=https://github.com/LimeSurvey/LimeSurvey>	SurveyMonkey, Qualtrics
Timeseries database	CrateDB	Distributed SQL database for real-time analytics of time series data		Kdb+
Timeseries database	InfluxDB	Database designed to process time series data	<a href=https://github.com/influxdata/influxdb>	Kdb+
Timeseries database	QuestDB	Database designed to process time series data	<a href=https://github.com/questdb/questdb>	Kdb+
Timeseries database	TDengine	Database designed to process time series data	<a href=https://github.com/taosdata/TDengine>	Kdb+
Timeseries database	TimescaleDB	Database designed to process time series data	<a href=https://github.com/timescale/timescaledb>	Kdb+
Tunnelling	Tunnelmole	Get a Public URL for your local development enviornment	<a href=https://github.com/robbie-cahill/tunnelmole-client>	Ngrok
VPN as a Service	OmniEdge	No-code P2P layer-2 mesh VPN for enterprise with zero config	<a href=https://github.com/omniedgeio/omniedge>	OpenVPN, Ngrok, Oray, AWS VPC
Video Conferencing	Jitsi	Video conferences platform and SDK	<a href=https://github.com/jitsi/jitsi-meet>	Zoom
Video Conferencing	LiveKit	SFU and SDKs for high-performance, scalable WebRTC	<a href=https://github.com/livekit/livekit-server>	Twilio, Agora
Video Conferencing	OpenVidu	Platform and SDKs to build on-premises WebRTC video conferences	<a href=https://github.com/OpenVidu/openvidu>	Twilio
Webhooks	Svix	Webhooks as a Service	<a href=https://github.com/svix/svix-webhooks>	Pusher
Website analytics	GoatCounter	Google Analytics alternative	<a href=https://github.com/arp242/goatcounter>	Google Analytics
Website analytics	Matomo	Google Analytics alternative	<a href=https://github.com/matomo-org/matomo>	Google Analytics
Website analytics	Plausible	Google Analytics alternative	<a href=https://github.com/plausible/analytics>	Google Analytics
Website analytics	Swetrix	Google Analytics alternative	<a href=https://github.com/swetrix/swetrix-js>	Google Analytics
Website analytics	Umami	Google Analytics alternative	<a href=https://github.com/mikecao/umami>	Google Analytics
Workflow automation	Activepieces	No-code business automation tool	<a href=https://github.com/activepieces/activepieces>	Zapier, Tray
Workflow automation	N8N	Node-based workflow automation tool for developers	<a href=https://github.com/n8n-io/n8n>	Zapier
Workflow automation	Pipedream	Workflow automation and API integration platform	<a href=https://github.com/PipedreamHQ/pipedream>	Zapier, Integromat
Workflow automation	Temporal	Workflows as code platform	<a href=https://github.com/temporalio/temporal>	Zapier

Useful Links

Great article on open-source challengers by Rajko Radovanovic

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Steve Purcell

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