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 | 156,069 |
 |
Supabase | Summer 2020 | API | Website | supabase/supabase | 92,868 |
 |
Font Awesome | Summer 2015 | API | Website | FortAwesome/Font-Awesome | 75,805 |
 |
FlowiseAI | Summer 2023 | API | Website | FlowiseAI/Flowise | 46,602 |
 |
Payload | Summer 2022 | API | Website | payloadcms/payload | 38,813 |
 |
MindsDB | Winter 2020 | API | Website | mindsdb/mindsdb | 37,325 |
 |
Twenty | Summer 2023 | API | Website | twentyhq/twenty | 36,832 |
 |
Reworkd | Summer 2023 | API | Website | reworkd/AgentGPT | 35,239 |
 |
Mattermost | Summer 2012 | API | Website | mattermost/mattermost | 34,411 |
 |
refine | Summer 2023 | API | Website | refinedev/refine | 33,297 |
 |
Khoj | Summer 2023 | API | Website | khoj-ai/khoj | 31,585 |
 |
InfluxData | Winter 2013 | API | Website | influxdata/influxdb | 30,826 |
 |
PostHog | Winter 2020 | API | Website | PostHog/posthog | 30,073 |
 |
Continue | Summer 2023 | API | Website | continuedev/continue | 29,865 |
 |
Reflex | Winter 2023 | API | Website | reflex-dev/reflex | 27,563 |
 |
RethinkDB | Summer 2009 | API | Website | rethinkdb/rethinkdb | 26,962 |
 |
Chatwoot | Winter 2021 | API | Website | chatwoot/chatwoot | 26,032 |
 |
SST | Winter 2021 | API | Website | sst/sst | 24,857 |
 |
SigNoz | Winter 2021 | API | Website | SigNoz/signoz | 24,406 |
 |
GitLab | Winter 2015 | API | Website | gitlabhq/gitlabhq | 24,164 |
 |
Infisical | Winter 2023 | API | Website | Infisical/infisical | 23,652 |
 |
Sails Co. | Winter 2015 | API | Website | balderdashy/sails | 22,857 |
 |
Wasmer | Summer 2019 | API | Website | wasmerio/wasmer | 20,182 |
 |
Airbyte | Winter 2020 | API | Website | airbytehq/airbyte | 20,043 |
 |
Apollo | Summer 2011 | API | Website | apollographql/apollo-client | 19,672 |
 |
Activepieces | Summer 2022 | API | Website | activepieces/activepieces | 19,189 |
 |
Langfuse | Winter 2023 | API | Website | langfuse/langfuse | 18,331 |
 |
Skyvern | Summer 2023 | API | Website | Skyvern-AI/skyvern | 18,121 |
 |
QuestDB | Summer 2020 | API | Website | questdb/questdb | 16,360 |
 |
Windmill | Summer 2022 | API | Website | windmill-labs/windmill | 15,128 |
 |
SuperTokens | Summer 2020 | API | Website | supertokens/supertokens-core | 14,696 |
 |
Trigger.dev | Winter 2023 | API | Website | triggerdotdev/trigger.dev | 12,787 |
 |
KeyDB | Summer 2020 | API | Website | Snapchat/KeyDB | 12,289 |
 |
Citus Data | Summer 2011 | API | Website | citusdata/citus | 12,021 |
 |
Ragas | Winter 2024 | API | Website | explodinggradients/ragas | 11,426 |
 |
OpenReplay | Summer 2019 | API | Website | openreplay/openreplay | 11,413 |
 |
Pyroscope | Winter 2021 | API | Website | grafana/pyroscope | 11,026 |
 |
Keep | Winter 2023 | API | Website | keephq/keep | 10,928 |
 |
HyperDX | Summer 2022 | API | Website | hyperdxio/hyperdx | 9,067 |
 |
highlight.io | Winter 2023 | API | Website | highlight/highlight | 8,969 |
 |
Activeloop | Summer 2018 | API | Website | activeloopai/deeplake | 8,896 |
 |
Lago | Summer 2021 | API | Website | getlago/lago | 8,807 |
 |
Firezone | Winter 2022 | API | Website | firezone/firezone | 8,244 |
 |
ParadeDB | Summer 2023 | API | Website | paradedb/paradedb | 7,940 |
 |
Webiny | Winter 2021 | API | Website | webiny/webiny-js | 7,889 |
 |
GrowthBook | Winter 2022 | API | Website | growthbook/growthbook | 7,095 |
 |
Evidently AI | Summer 2021 | API | Website | evidentlyai/evidently | 6,819 |
 |
Shuttle | Summer 2020 | API | Website | shuttle-hq/shuttle | 6,733 |
 |
Traceloop | Winter 2023 | API | Website | traceloop/openllmetry | 6,591 |
 |
Superagent | Winter 2024 | API | Website | superagent-ai/superagent | 6,253 |
 |
authzed | Winter 2021 | API | Website | authzed/spicedb | 6,199 |
 |
Nango | Winter 2023 | API | Website | NangoHQ/nango | 6,045 |
 |
Docker | Summer 2010 | API | Website | docker/cli | 5,554 |
 |
Lightdash | Summer 2020 | API | Website | lightdash/lightdash | 5,343 |
 |
Requestly | Winter 2022 | API | Website | requestly/requestly | 5,156 |
 |
Helicone | Winter 2023 | API | Website | Helicone/helicone | 4,739 |
 |
Rivet | Winter 2023 | API | Website | rivet-gg/rivet | 4,686 |
 |
Arroyo | Winter 2023 | API | Website | ArroyoSystems/arroyo | 4,643 |
 |
Defog.ai | Winter 2023 | API | Website | defog-ai/sqlcoder | 3,940 |
 |
Vocode | Winter 2023 | API | Website | vocodedev/vocode-core | 3,621 |
 |
Revideo | Summer 2023 | API | Website | redotvideo/revideo | 3,523 |
 |
moonrepo | Winter 2023 | API | Website | moonrepo/moon | 3,516 |
 |
Okteto | Winter 2019 | API | Website | okteto/okteto | 3,458 |
 |
Fern | Winter 2023 | API | Website | fern-api/fern | 3,409 |
 |
Svix | Winter 2021 | API | Website | svix/svix-webhooks | 2,982 |
 |
PeerDB | Summer 2023 | API | Website | PeerDB-io/peerdb | 2,804 |
 |
OpenPipe | Summer 2023 | API | Website | OpenPipe/OpenPipe | 2,752 |
 |
Convoy | Winter 2022 | API | Website | frain-dev/convoy | 2,711 |
|
PipelineDB | Winter 2014 | API | Website | pipelinedb/pipelinedb | 2,650 |
 |
Trieve | Winter 2024 | API | Website | devflowinc/trieve | 2,557 |
 |
Laudspeaker | Winter 2021 | API | Website | laudspeaker/laudspeaker | 2,541 |
 |
Dittofeed | Summer 2022 | API | Website | dittofeed/dittofeed | 2,536 |
 |
Ballerine | Summer 2022 | API | Website | ballerine-io/ballerine | 2,315 |
 |
DAGWorks Inc. | Winter 2023 | API | Website | DAGWorks-Inc/hamilton | 2,315 |
 |
Elementary | Winter 2022 | API | Website | elementary-data/elementary | 2,189 |
 |
Medplum | Summer 2022 | API | Website | medplum/medplum | 2,013 |
 |
Lotus | Summer 2022 | API | Website | uselotus/lotus | 1,784 |
 |
Matano | Winter 2023 | API | Website | matanolabs/matano | 1,624 |
 |
RecipeUI | Summer 2023 | API | Website | RecipeUI/RecipeUI | 1,338 |
 |
Warrant | Summer 2021 | API | Website | warrant-dev/warrant | 1,315 |
 |
Lantern | Winter 2024 | API | Website | lanterndata/lantern | 868 |
 |
Tensil | Summer 2019 | API | Website | tensil-ai/tensil | 391 |
 |
OpenFoundry | Winter 2024 | API | Website | openfoundry-ai/model_manager | 331 |
 |
Monosi | Summer 2020 | API | Website | monosidev/monosi | 327 |
 |
Grai | Summer 2022 | API | Website | grai-io/grai-core | 312 |
 |
Embrace | Summer 2019 | API | Website | embrace-io/embrace-android-sdk | 166 |
 |
Infracost | Winter 2021 | API | Website | infracost/infracost-azure-devops | 58 |
 |
Common Paper | Winter 2023 | API | Website | CommonPaper/Mutual-NDA | 36 |
 |
Enso | Summer 2021 | API | Website | enso-org/hiring | 27 |
 |
nCompass Technologies | Winter 2024 | API | Website | nCompass-tech/nCompass | 1 |
 |
Alokai | Winter 2021 | API | Website | ||
 |
Artillery | Summer 2021 | API | Website | ||
 |
Beam | Winter 2022 | API | Website | ||
 |
Better Auth | Spring 2025 | API | Website | ||
 |
BotCity | Winter 2022 | API | Website | ||
 |
Browser Use | Winter 2025 | API | Website | ||
 |
Bun | Summer 2019 | API | Website | ||
 |
Cactus | Summer 2025 | API | Website | ||
 |
Chaos Genius | Winter 2020 | API | Website | ||
 |
CodeStream | Winter 2018 | API | Website | ||
 |
Confident AI | Winter 2025 | API | Website | ||
 |
CoreOS | Summer 2013 | API | Website | ||
 |
Cua | Spring 2025 | API | Website | ||
 |
Daily | Winter 2016 | API | Website | ||
 |
Data Mechanics | Summer 2019 | API | Website | ||
 |
Epicenter | Summer 2025 | API | Website | ||
 |
Expected Parrot | Fall 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 | ||
 |
Mem0 | Summer 2024 | API | Website | ||
 |
Mentra | Winter 2025 | API | Website | ||
 |
Metorial | Fall 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 | ||
 |
OpenBuilder | Fall 2025 | API | Website | ||
 |
OpenInt | Winter 2023 | API | Website | ||
 |
Opslane | Summer 2024 | API | Website | ||
 |
Optic | Summer 2018 | 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 | ||
 |
SF Tensor | Fall 2025 | API | Website | ||
 |
Sourcebot | Fall 2025 | API | Website | ||
 |
Stackup | Summer 2022 | API | Website | ||
 |
stagewise | Summer 2025 | API | Website | ||
 |
Standard Cyborg | Winter 2015 | 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 | ||
 |
Ukama | Summer 2020 | API | Website | ||
 |
Unsloth AI | Summer 2024 | API | Website | ||
 |
Velum Labs | Fall 2025 | API | Website | ||
 |
Vibe Kanban | Summer 2021 | API | Website | ||
 |
Wasp | Winter 2021 | API | Website | ||
 |
Zero | Spring 2025 | API | Website |