Awesome list of open-source startup alternatives to established SaaS products. Maintained by folks at [Runa Capital](https://runacap.com/).
Also checkout our [ROSS index](https://runacap.com/ross-index/): fastest-growing open-source startups, every quarter.
Criteria
--------
Open-source company is added to the list if:
1. Its product is strongly based on an open-source repo
2. It has a well-known closed-sourced competitor, solving a similar business problem
3. It is a private for-profit company, founded in the last 10 years
4. 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](https://github.com/RunaCapital/awesome-oss-alternatives/blob/main/.github/CONTRIBUTING.md) and add new startups. Let's build the most comprehensive list together.
* * *
Startup List
------------
All startups in the list are sorted by categories and names in an alphabetical order. If you click on the stars badge, you will get to a product's repo. **Have a good search!**
| Category | Company | Description | GitHub Stars | Alternative to |
| --- | --- | --- | --- | --- |
| API Platform | [Hoppscotch](https://github.com/hoppscotch/hoppscotch) | API development ecosystem | [](https://github.com/hoppscotch/hoppscotch) | [Postman](https://www.postman.com/) |
| Auth & SSO | [Supertokens](https://supertokens.io/) | User authentication and session management framework | [](https://github.com/supertokens/supertokens-core) | [Okta](https://okta.com/), [Auth0](https://auth0.com/) |
| Backend as a service | [Appwrite](https://appwrite.io/) | Backend server with REST APIs to manage core backend needs | [](https://github.com/appwrite/appwrite) | [Firebase](https://firebase.google.com/) |
| Backend as a service | [Kuzzle](https://kuzzle.io/kuzzle-backend/) | Backend server with REST APIs to manage core backend needs | [](https://github.com/kuzzleio/kuzzle) | [Firebase](https://firebase.google.com/) |
| Backend as a service | [Nhost](https://nhost.io/) | Backend server with GraphQL | [](https://github.com/nhost/nhost) | [Firebase](https://firebase.google.com/) |
| Backend as a service | [Supabase](https://supabase.io/) | Backend server with REST APIs to manage core backend needs | [](https://github.com/supabase/supabase) | [Firebase](https://firebase.google.com/) |
| Business intelligence | [Metabase](https://www.metabase.com/) | Business intelligence software | [](https://github.com/metabase/metabase) | [Tableau](https://www.tableau.com/), [Power BI](https://powerbi.microsoft.com/), [DataStudio](https://datastudio.google.com/) |
| CMS | [Builder](https://builder.io/) | Drag and drop page builder and CMS | [](https://github.com/builderio/builder) | [Contentfull](https://www.contentful.com/) |
| CMS | [Concrete](https://www.concretecms.com/) | CMS for teams | [](https://github.com/concrete5/concrete5) | [Contentfull](https://www.contentful.com/) |
| CMS | [Directus](https://directus.io/) | Data platform which wraps any database with an intuitive app | [](https://github.com/directus/directus) | [Contentfull](https://www.contentful.com/) |
| CMS | [Netlify CMS](https://www.netlifycms.org/) | Git-based CMS for static site generators | [](https://github.com/netlify/netlify-cms) | [Contentfull](https://www.contentful.com/) |
| CMS | [Plasmic](https://plasmic.app/) | The headless page builder for singe-page frameworks | [](https://github.com/plasmicapp/plasmic) | [Contentfull](https://www.contentful.com/) |
| Communication | [Fonoster](https://fonoster.com/) | APIs for SMS, voice and video | [](https://github.com/fonoster/fonoster) | [Twilio](https://www.twilio.com/) |
| Customer Data Platform | [Jitsu](https://jitsu.com/) | Fully-scriptable data ingestion engine for modern data teams | [](https://github.com/jitsucom/jitsu) | [Segment](https://segment.com/) |
| Customer Data Platform | [Rudderstack](https://rudderstack.com/) | Customer data platform for developers | [](https://github.com/rudderlabs/rudder-server) | [Segment](https://segment.com/) |
| Cybersecurity | [CloudQuery](https://cloudquery.io/) | Assess, audit, and evaluate the configurations of your cloud assets. | [](https://github.com/cloudquery/cloudquery) | [AWS Config](https://aws.amazon.com/config/), [GCP Cloud Asset Inventory](https://cloud.google.com/asset-inventory), [AWS GuardDuty](https://aws.amazon.com/guardduty/) |
| Cybersecurity | [CrowdSec](http://crowdsec.net/) | Collaborative IPS able to analyze visitor behavior and to provide an adapted response to all kinds of attacks. | [](https://github.com/crowdsecurity/crowdsec) | [GreyNoise](https://www.greynoise.io/) |
| Cybersecurity | [Firezone](https://www.firez.one/) | VPN Server & Firewall for teams | [](https://github.com/firezone/firezone) | [OpenVPN Access Server](https://openvpn.net/access-server/) |
| ELT / ETL | [Prefect](https://www.prefect.io/) | Data orchestration platform for a modern data stack | [](https://github.com/prefecthq/prefect) | [Fivetran](https://fivetran.com/) |
| ERP | [DoliCloud](https://dolicloud.com/) | Business management suite (ERP and CRM) | [](https://github.com/Dolibarr/dolibarr) | [Oracle Fusion ERP Cloud](https://www.oracle.com/erp),[Odoo](https://odoo.com/),[Microsoft Dynamics](https://dynamics.microsoft.com/) |
| Feature flag and toggle management | [FlagSmith](https://flagsmith.com/) | Feature Flag & Remote Config Service | [](https://github.com/Flagsmith/flagsmith) | [LaunchDarkly](https://launchdarkly.com/) |
| Feature flag and toggle management | [GrowthBook](https://www.growthbook.io/) | Feature flags and A/B testing | [](https://github.com/growthbook/growthbook) | [LaunchDarkly](https://launchdarkly.com/) |
| Feature flag and toggle management | [Unleash](https://www.getunleash.io/) | Feature flags platform | [](https://github.com/Unleash/unleash) | [LaunchDarkly](https://launchdarkly.com/) |
| File Hosting | [Filestash](https://www.filestash.app/) | A file manager that let you manage your data anywhere it is located | [](https://github.com/mickael-kerjean/filestash) | [Dropbox](https://www.dropbox.com/), [Google Drive](https://drive.google.com/) |
| File Hosting | [Nextcloud](https://nextcloud.com/) | A personal cloud which runs on your own server | [](https://github.com/nextcloud/server) | [Dropbox](https://www.dropbox.com/), [Google Drive](https://drive.google.com/) |
| File Hosting | [Owncloud](https://owncloud.com/) | A personal cloud which runs on your own server | [](https://github.com/owncloud/core) | [Dropbox](https://www.dropbox.com/), [Google Drive](https://drive.google.com/) |
| Forum Software | [Discourse](https://www.discourse.org/) | A platform for community discussion | [](https://github.com/discourse/discourse) | [Tribe](https://tribe.so/), [Circle](https://circle.so/) |
| Forum Software | [Vanilla](https://vanillaforums.com/) | A platform for community discussion | [](https://github.com/vanilla/vanilla) | [Tribe](https://tribe.so/), [Circle](https://circle.so/) |
| Graph database | [ArangoDB](https://www.arangodb.com/) | Graph database and document store | [](https://github.com/arangodb/arangodb) | [TigerGraph](https://www.tigergraph.com/), [Amazon Neptune](https://aws.amazon.com/neptune/) |
| Metrics store | [Cube.js](https://cube.dev/) | Headless business intelligence suite | [](https://github.com/cube-js/cube.js) | [Looker](https://looker.com/) |
| Metrics store | [LightDash](https://www.lightdash.com/) | Low-code metrics layer, alternative to Looker | [](https://github.com/lightdash/lightdash) | [Looker](https://looker.com/) |
| Metrics store | [MLCraft](http://mlcraft.io/) | Low-code metrics layer, alternative to Looker | [](https://github.com/mlcraft-io/mlcraft) | [Looker](https://looker.com/) |
| Metrics store | [MetriQL](https://metriql.com/) | Headless business intelligence suite | [](https://github.com/metriql/metriql) | [Looker](https://looker.com/) |
| No-code database | [Baserow](https://baserow.io/) | No-code database and Airtable alternative | [](https://gitlab.com/bramw/baserow) | [AirTable](https://www.airtable.com/) |
| No-code database | [NocoDB](https://www.nocodb.com/) | No-code database and Airtable alternative | [](https://github.com/nocodb/nocodb) | [AirTable](https://www.airtable.com/) |
| Notetaking | [Outline](https://www.getoutline.com/) | Wiki and knowledge base | [](https://github.com/outline/outline) | [Notion](https://notion.so/) |
| Observability and monitoring | [Grafana](https://grafana.com/) | Observability and data visualization platform | [](https://github.com/grafana/grafana) | [DataDog](https://www.datadoghq.com/), [NewRelic](https://newrelic.com/) |
| Observability and monitoring | [Sentry](https://sentry.io/) | Application monitoring with a focus on error reporting | [](https://github.com/getsentry/sentry) | [DataDog](https://www.datadoghq.com/), [NewRelic](https://newrelic.com/) |
| Observability and monitoring | [Signoz](https://signoz.io/) | Application monitoring and observability platform | [](https://github.com/signoz/signoz) | [DataDog](https://www.datadoghq.com/), [NewRelic](https://newrelic.com/) |
| Observability and monitoring | [VictoriaMetrics](https://victoriametrics.com/) | Application monitoring and observability platform | [](https://github.com/VictoriaMetrics/VictoriaMetrics) | [DataDog](https://www.datadoghq.com/), [NewRelic](https://newrelic.com/) |
| Observability and monitoring | [Netdata](https://www.netdata.cloud/) | Application monitoring and observability platform | [](https://github.com/netdata/netdata) | [DataDog](https://www.datadoghq.com/), [NewRelic](https://newrelic.com/) |
| Password manager | [BitWarden](https://bitwarden.com/) | Password manager for teams and individuals | [](https://github.com/bitwarden/server) | [1Password](https://1password.com/) |
| Password manager | [Padloc](https://padloc.app/) | Password manager for teams and individuals | [](https://github.com/padloc/padloc) | [1Password](https://1password.com/) |
| Password manager | [Passbolt](https://www.passbolt.com/) | Password manager for teams and individuals | [](https://github.com/passbolt/passbolt_api) | [1Password](https://1password.com/) |
| Platform as a service | [Coolify](https://coolify.io/) | Self-hostable Heroku alternative | [](https://github.com/coollabsio/coolify) | [Heroku](https://www.heroku.com/) |
| Platform as a service | [Porter](https://porter.run/) | Kubernetes powered PaaS that runs in your own cloud | [](https://github.com/porter-dev/porter) | [Heroku](https://www.heroku.com/) |
| Platform as a service | [Qovery](https://www.qovery.com/) | Kubernetes powered PaaS that runs in your own cloud | [](https://github.com/Qovery/engine) | [Heroku](https://www.heroku.com/) |
| Platform as a service | [Space Cloud](https://space-cloud.io/) | Serverless cloud deployment platform | [](https://github.com/spacecloud-io/space-cloud) | [Heroku](https://www.heroku.com/) |
| Robotic Process Automation (RPA) | [RoboCorp](https://robocorp.com/) | Set of tooling that allows to create automation packages | [](https://github.com/robocorp/rcc) | [UiPath](https://www.uipath.com/) |
| Scheduling | [Calendso](https://cal.com/) | Scheduling infrastructure, alternative to Calendly | [](https://github.com/calendso/calendso) | [Calendly](https://calendly.com/) |
| Timeseries database | [InfluxDB](https://www.influxdata.com/) | Database designed to process time series data | [](https://github.com/influxdata/influxdb) | [Kdb+](https://kx.com/developers/) |
| Timeseries database | [QuestDB](https://questdb.io/) | Database designed to process time series data | [](https://github.com/questdb/questdb) | [Kdb+](https://kx.com/developers/) |
| Timeseries database | [TimescaleDB](https://www.timescale.com/) | Database designed to process time series data | [](https://github.com/timescale/timescaledb) | [Kdb+](https://kx.com/developers/) |
| Timeseries database | [TDengine](https://tdengine.com/?en) | Database designed to process time series data | [](https://github.com/taosdata/TDengine) | [Kdb+](https://kx.com/developers/) |
| Video Conferencing | [Jitsi](https://jitsi.org/meet) | Video conferences platform and SDK | [](https://github.com/jitsi/jitsi-meet) | [Zoom](https://zoom.us/) |
| Website analytics | [GoatCounter](https://www.goatcounter.com/) | Google Analytics alternative | [](https://github.com/arp242/goatcounter) | [Google Analytics](https://analytics.google.com/) |
| Website analytics | [Matomo](https://matomo.org/) | Google Analytics alternative | [](https://github.com/matomo-org/matomo) | [Google Analytics](https://analytics.google.com/) |
| Website analytics | [Plausible](https://plausible.io/) | Google Analytics alternative | [](https://github.com/plausible/analytics) | [Google Analytics](https://analytics.google.com/) |
| Website analytics | [Umami](https://umami.is/) | Google Analytics alternative | [](https://github.com/mikecao/umami) | [Google Analytics](https://analytics.google.com/) |