This repository contains a list of open source startups funded by Y Combinator that have publicly launched on the Y Combinator website. It is sourced from yc-oss.github.io/api/tags/open-source.json.
In the near future, we will include the link to their repositories.
How can I get my company listed here?
The companies listed on this page are:
- Funded by Y Combinator
- Publicly launched and listed on the YC website
- Have the "Open source" tag attached to their company
If you have all the above conditions met, your company should be listed here. This data is updated every day.
| Logo | Company | Batch | API | Website | Repo | Stars |
|---|---|---|---|---|---|---|
 |
Ollama | Winter 2021 | API | Website | ollama/ollama | 151,905 |
 |
Supabase | Summer 2020 | API | Website | supabase/supabase | 88,134 |
 |
Font Awesome | Summer 2015 | API | Website | FortAwesome/Font-Awesome | 75,637 |
 |
FlowiseAI | Summer 2023 | API | Website | FlowiseAI/Flowise | 43,412 |
 |
Payload | Summer 2022 | API | Website | payloadcms/payload | 37,373 |
 |
MindsDB | Winter 2020 | API | Website | mindsdb/mindsdb | 35,611 |
 |
Twenty | Summer 2023 | API | Website | twentyhq/twenty | 35,337 |
 |
Reworkd | Summer 2023 | API | Website | reworkd/AgentGPT | 34,883 |
 |
Mattermost | Summer 2012 | API | Website | mattermost/mattermost | 33,568 |
 |
refine | Summer 2023 | API | Website | refinedev/refine | 32,531 |
 |
Khoj | Summer 2023 | API | Website | khoj-ai/khoj | 30,884 |
 |
InfluxData | Winter 2013 | API | Website | influxdata/influxdb | 30,594 |
 |
PostHog | Winter 2020 | API | Website | PostHog/posthog | 28,997 |
 |
Continue | Summer 2023 | API | Website | continuedev/continue | 28,824 |
 |
RethinkDB | Summer 2009 | API | Website | rethinkdb/rethinkdb | 26,943 |
 |
Reflex | Winter 2023 | API | Website | reflex-dev/reflex | 25,794 |
 |
Chatwoot | Winter 2021 | API | Website | chatwoot/chatwoot | 25,231 |
 |
SST | Winter 2021 | API | Website | sst/sst | 24,482 |
 |
GitLab | Winter 2015 | API | Website | gitlabhq/gitlabhq | 24,086 |
 |
SigNoz | Winter 2021 | API | Website | SigNoz/signoz | 23,434 |
 |
Sails Co. | Winter 2015 | API | Website | balderdashy/sails | 22,864 |
 |
Infisical | Winter 2023 | API | Website | Infisical/infisical | 20,021 |
 |
Wasmer | Summer 2019 | API | Website | wasmerio/wasmer | 20,008 |
 |
Apollo | Summer 2011 | API | Website | apollographql/apollo-client | 19,623 |
 |
Airbyte | Winter 2020 | API | Website | airbytehq/airbyte | 19,439 |
 |
Activepieces | Summer 2022 | API | Website | activepieces/activepieces | 17,726 |
 |
QuestDB | Summer 2020 | API | Website | questdb/questdb | 16,058 |
 |
Langfuse | Winter 2023 | API | Website | langfuse/langfuse | 15,907 |
 |
Windmill | Summer 2022 | API | Website | windmill-labs/windmill | 14,554 |
 |
SuperTokens | Summer 2020 | API | Website | supertokens/supertokens-core | 14,486 |
 |
Skyvern | Summer 2023 | API | Website | Skyvern-AI/skyvern | 14,222 |
 |
Trigger.dev | Winter 2023 | API | Website | triggerdotdev/trigger.dev | 12,222 |
 |
KeyDB | Summer 2020 | API | Website | Snapchat/KeyDB | 12,127 |
 |
Citus Data | Summer 2011 | API | Website | citusdata/citus | 11,783 |
 |
OpenReplay | Summer 2019 | API | Website | openreplay/openreplay | 11,084 |
 |
Pyroscope | Winter 2021 | API | Website | grafana/pyroscope | 10,875 |
 |
Keep | Winter 2023 | API | Website | keephq/keep | 10,643 |
 |
Ragas | Winter 2024 | API | Website | explodinggradients/ragas | 10,638 |
 |
HyperDX | Summer 2022 | API | Website | hyperdxio/hyperdx | 8,840 |
 |
Activeloop | Summer 2018 | API | Website | activeloopai/deeplake | 8,809 |
 |
highlight.io | Winter 2023 | API | Website | highlight/highlight | 8,647 |
 |
Lago | Summer 2021 | API | Website | getlago/lago | 8,424 |
 |
Webiny | Winter 2021 | API | Website | webiny/webiny-js | 7,830 |
 |
ParadeDB | Summer 2023 | API | Website | paradedb/paradedb | 7,724 |
 |
Firezone | Winter 2022 | API | Website | firezone/firezone | 7,496 |
 |
GrowthBook | Winter 2022 | API | Website | growthbook/growthbook | 6,837 |
 |
Shuttle | Summer 2020 | API | Website | shuttle-hq/shuttle | 6,644 |
 |
Evidently AI | Summer 2021 | API | Website | evidentlyai/evidently | 6,587 |
 |
Traceloop | Winter 2023 | API | Website | traceloop/openllmetry | 6,281 |
 |
Superagent | Winter 2024 | API | Website | superagent-ai/superagent | 6,107 |
 |
authzed | Winter 2021 | API | Website | authzed/spicedb | 6,008 |
 |
Nango | Winter 2023 | API | Website | NangoHQ/nango | 5,822 |
 |
Docker | Summer 2010 | API | Website | docker/cli | 5,432 |
 |
Lightdash | Summer 2020 | API | Website | lightdash/lightdash | 5,041 |
 |
Arroyo | Winter 2023 | API | Website | ArroyoSystems/arroyo | 4,507 |
 |
Helicone | Winter 2023 | API | Website | Helicone/helicone | 4,472 |
 |
Rivet | Winter 2023 | API | Website | rivet-gg/rivet | 4,360 |
 |
Requestly | Winter 2022 | API | Website | requestly/requestly | 3,968 |
 |
Defog.ai | Winter 2023 | API | Website | defog-ai/sqlcoder | 3,878 |
 |
Revideo | Summer 2023 | API | Website | redotvideo/revideo | 3,444 |
 |
Okteto | Winter 2019 | API | Website | okteto/okteto | 3,439 |
 |
Vocode | Winter 2023 | API | Website | vocodedev/vocode-core | 3,436 |
 |
moonrepo | Winter 2023 | API | Website | moonrepo/moon | 3,364 |
 |
Fern | Winter 2023 | API | Website | fern-api/fern | 3,305 |
 |
Svix | Winter 2021 | API | Website | svix/svix-webhooks | 2,882 |
 |
OpenPipe | Summer 2023 | API | Website | OpenPipe/OpenPipe | 2,731 |
 |
Convoy | Winter 2022 | API | Website | frain-dev/convoy | 2,680 |
 |
PeerDB | Summer 2023 | API | Website | PeerDB-io/peerdb | 2,659 |
|
PipelineDB | Winter 2014 | API | Website | pipelinedb/pipelinedb | 2,648 |
 |
Laudspeaker | Winter 2021 | API | Website | laudspeaker/laudspeaker | 2,522 |
 |
Trieve | Winter 2024 | API | Website | devflowinc/trieve | 2,474 |
 |
Dittofeed | Summer 2022 | API | Website | dittofeed/dittofeed | 2,463 |
 |
Ballerine | Summer 2022 | API | Website | ballerine-io/ballerine | 2,294 |
 |
DAGWorks Inc. | Winter 2023 | API | Website | DAGWorks-Inc/hamilton | 2,255 |
 |
Elementary | Winter 2022 | API | Website | elementary-data/elementary | 2,148 |
 |
Medplum | Summer 2022 | API | Website | medplum/medplum | 1,897 |
 |
Lotus | Summer 2022 | API | Website | uselotus/lotus | 1,777 |
 |
TableFlow | Winter 2023 | API | Website | tableflowhq/csv-import | 1,760 |
 |
Matano | Winter 2023 | API | Website | matanolabs/matano | 1,611 |
 |
RecipeUI | Summer 2023 | API | Website | RecipeUI/RecipeUI | 1,344 |
 |
Warrant | Summer 2021 | API | Website | warrant-dev/warrant | 1,300 |
 |
Lantern | Winter 2024 | API | Website | lanterndata/lantern | 862 |
 |
Artie | Summer 2023 | API | Website | artie-labs/transfer | 668 |
 |
Tensil | Summer 2019 | API | Website | tensil-ai/tensil | 387 |
 |
OpenFoundry | Winter 2024 | API | Website | openfoundry-ai/model_manager | 328 |
 |
Monosi | Summer 2020 | API | Website | monosidev/monosi | 326 |
 |
Grai | Summer 2022 | API | Website | grai-io/grai-core | 308 |
 |
Embrace | Summer 2019 | API | Website | embrace-io/embrace-android-sdk | 163 |
 |
nCompass Technologies | Winter 2024 | API | Website | nCompass-tech/nCompass | 67 |
 |
Infracost | Winter 2021 | API | Website | infracost/infracost-azure-devops | 56 |
 |
Common Paper | Winter 2023 | API | Website | CommonPaper/Mutual-NDA | 34 |
 |
Enso | Summer 2021 | API | Website | enso-org/hiring | 27 |
 |
Alokai | Winter 2021 | API | Website | ||
 |
Artillery | Summer 2021 | API | Website | ||
 |
Beam | Winter 2022 | API | Website | ||
 |
Better Auth | Spring 2025 | API | Website | ||
 |
bloop | Summer 2021 | API | Website | ||
 |
BotCity | Winter 2022 | API | Website | ||
 |
Browser Use | Winter 2025 | API | Website | ||
 |
Bun | Summer 2019 | API | Website | ||
 |
Chaos Genius | Winter 2020 | API | Website | ||
 |
CodeStream | Winter 2018 | API | Website | ||
 |
Confident AI | Winter 2025 | API | Website | ||
 |
CoreOS | Summer 2013 | API | Website | ||
 |
Daily | Winter 2016 | API | Website | ||
 |
Data Mechanics | Summer 2019 | API | Website | ||
 |
Epicenter | Summer 2025 | API | Website | ||
 |
Fig | Summer 2020 | API | Website | ||
 |
Firecrawl | Summer 2022 | API | Website | ||
 |
Fluidize | Summer 2025 | API | Website | ||
 |
Formance | Summer 2021 | API | Website | ||
 |
Freestyle | Summer 2024 | API | Website | ||
 |
Hatchet | Winter 2024 | API | Website | ||
 |
HelixDB | Spring 2025 | API | Website | ||
 |
Hydra | Winter 2022 | API | Website | ||
 |
Jitsu | Summer 2020 | API | Website | ||
 |
Klavis AI | Spring 2025 | API | Website | ||
 |
Lamin | Summer 2022 | API | Website | ||
 |
LanceDB | Winter 2022 | API | Website | ||
 |
Lingo.dev | Fall 2024 | API | Website | ||
 |
LiteLLM | Winter 2023 | API | Website | ||
 |
LlamaFarm | Winter 2022 | API | Website | ||
 |
Lumen Payments | Winter 2024 | API | Website | ||
 |
LunaSec | Summer 2019 | API | Website | ||
 |
Lunatic | Winter 2021 | API | Website | ||
 |
Mastra | Winter 2025 | API | Website | ||
 |
mcp-use | Summer 2025 | API | Website | ||
 |
Mem0 | Summer 2024 | API | Website | ||
 |
Mentra | Winter 2025 | API | Website | ||
 |
Mintplex Labs | Summer 2022 | API | Website | ||
 |
Mito | Summer 2020 | API | Website | ||
 |
Morphik | Spring 2025 | API | Website | ||
 |
Netmaker | Winter 2022 | API | Website | ||
 |
Onyx | Winter 2024 | API | Website | ||
 |
Openbase | Summer 2020 | API | Website | ||
 |
OpenInt | Winter 2023 | API | Website | ||
 |
Opslane | Summer 2024 | API | Website | ||
 |
Optic | Summer 2018 | API | Website | ||
 |
Pangolin | Summer 2025 | API | Website | ||
 |
Pipekit | Summer 2021 | API | Website | ||
 |
Protocol Labs | Summer 2014 | API | Website | ||
 |
Random Labs | Summer 2024 | API | Website | ||
 |
Replicate | Winter 2020 | API | Website | ||
 |
RowBoat Labs | Summer 2024 | API | Website | ||
 |
Stackup | Summer 2022 | API | Website | ||
 |
stagewise | Summer 2025 | API | Website | ||
 |
Standard Cyborg | Winter 2015 | API | Website | ||
 |
Structured Labs | Summer 2023 | API | Website | ||
 |
Sublingual | Winter 2025 | API | Website | ||
 |
superglue | Winter 2025 | API | Website | ||
 |
Tesseral | Winter 2024 | API | Website | ||
 |
Tipe | Winter 2018 | API | Website | ||
 |
Tiptap | Summer 2023 | API | Website | ||
 |
Tracecat | Winter 2024 | API | Website | ||
 |
TraceRoot.AI | Summer 2025 | API | Website | ||
 |
Ukama | Summer 2020 | API | Website | ||
 |
Unsloth AI | Summer 2024 | API | Website | ||
 |
Wasp | Winter 2021 | API | Website | ||
 |
Zero | Spring 2025 | API | Website |
