The fastest-growing open-source startups in Q1 2021

Key	Company	Country	City	Founded	Raised	Repo	Language	Stars	Forks	Stars AGR	Forks AGR	SG	FG
dolthub/dolt	DoltHub	USA	Los Angeles	2018	5.0	dolthub/dolt	Go	8,342	207	21,500	6,365	215.0	63.7
lbryio/lbry-desktop	Lbry	USA	Manchester	2015	0.5	lbryio/lbry-desktop	JavaScript	3,806	352	5,061	34	50.6	0.3
penpot/penpot	Penpot	Spain	Madrid	2019		penpot/penpot	Clojure	3,734	177	4,562	1,613	45.6	16.1
athensresearch/athens	Athens Research	USA	San Francisco	2020	0.1	athensresearch/athens	Clojure	3,887	223	1,244	740	12.4	7.4
infracost/infracost	Infracost	UK	Edinburgh	2020	0.1	infracost/infracost	Go	2,747	105	762	305	7.6	3.1
appwrite/appwrite	Appwrite	Israel	Tel Aviv	2019		appwrite/appwrite	JavaScript	6,355	625	632	56	6.3	0.6
appsmithorg/appsmith	Appsmith	India	Bengaluru	2019		appsmithorg/appsmith	TypeScript	2,086	286	582	244	5.8	2.4
papercups-io/papercups	Papercups	USA	San Francisco	2020	0.1	papercups-io/papercups	Elixir	3,794	240	548	279	5.5	2.8
supabase/supabase	Supabase	Singapore	Singapore	2020	6.1	supabase/supabase	TypeScript	7,058	296	462	819	4.6	8.2
paritytech/polkadot	Parity Technologies	UK	London	2015	5.8	paritytech/polkadot	Rust	2,871	608	419	265	4.2	2.7
ory/kratos	ORY	Germany	Munich	2015		ory/kratos	Go	2,849	247	395	163	4.0	1.6
jina-ai/jina	Jina AI	Germany	Berlin	2020	7.4	jina-ai/jina	Python	2,672	403	393	168	3.9	1.7
dendronhq/dendron	Dendron	USA	Seattle	2019	2.0	dendronhq/dendron	TypeScript	1,572	54	387	232	3.9	2.3
plausible/analytics	Plausible	Estonia	Tartu	2018		plausible/analytics	Elixir	7,116	310	371	224	3.7	2.2
projectdiscovery/nuclei	Project Discovery	India	Mumbai	2019	1.7	projectdiscovery/nuclei	Go	3,537	446	362	323	3.6	3.2
tailwindlabs/headlessui	Tailwind Labs	Canada	Cambridge	2017		tailwindlabs/headlessui	TypeScript	5,580	159	359	565	3.6	5.7
vectorizedio/redpanda	Vectorized	USA	San Francisco	2019	15.5	vectorizedio/redpanda	C++	1,917	88	315	940	3.2	9.4
coinalpha/hummingbot	Hummingbot	USA	Mountain View	2017	5.1	coinalpha/hummingbot	Python	1,522	650	299	197	3.0	2.0
heartexlabs/label-studio	Heartlex	USA	San Francisco	2019	0.2	heartexlabs/label-studio	Python	5,431	504	285	213	2.9	2.1
modulz/stitches	Modulz	Ireland	Dublin	2019	5.4	modulz/stitches	TypeScript	2,255	71	282	199	2.8	2.0

DoltHub (dolthub/dolt, 8.3K stars, 21500% AGR). Data platform with version control and collaboration tools (Git for data). Founded in 2018 in Los Angeles and raised $5M from Timothy Sehn.
Lbry (lbryio/lbry-desktop, 3.8K stars, 5061% AGR). Content sharing and publishing decentralized platform. Founded in 2015 in Manchester and raised $0.5M from Pillar VC.
Penpot (penpot/penpot, 3.7K stars, 4562% AGR). Design and prototyping platform meant for cross-domain teams. Founded in 2019 in Madrid and has no known external funding.
Athens Research (athensresearch/athens, 3.9K stars, 1244% AGR). Note-taking app (alternative to Roam Research). Founded in 2020 in San Francisco and raised $125K from Y Combinator.
Infracost (infracost/infracost, 2.7K stars, 762% AGR). Cost estimation tool for DevOps, SRE and developers . Founded in 2020 in Edinburgh and raised $125K from Y Combinator.
Appwrite (appwrite/appwrite, 6.4K stars, 632% AGR). Backend-as-a-service for web, mobile and Flutter developers. Founded in 2019 in Tel Aviv and has no known external funding.
Appsmith (appsmithorg/appsmith, 2.1K stars, 582% AGR). Framework for the building of admin panels, CRUD apps and workflows. Founded in 2019 in Bengaluru and has no known external funding.
Papercups (papercups-io/papercups, 3.8K stars, 548% AGR). Customer messaging service (open-source alternative to Intercom). Founded in 2020 in San Francisco and raised $125K from Y Combinator and Lombardstreet Ventures
Supabase (supabase/supabase, 7.1K stars, 462% AGR). RESTful APIs for PostgreSQL without a single line of code (open-source alternative to Firebase). Founded in 2020 in Singapore and raised $6.1M from Coatue and Y Combinator.
Parity Technologies (paritytech/polkadot, 2.9K stars, 419% AGR). Blockchain infrastructure developer, mostly known for its involvement in Polkadot. Founded in 2015 in London and raised $5.8M from Fenbushi Capital, Blockchain Capital, etc
ORY (ory/kratos, 2.8K stars, 395% AGR). Identity Infrastructure for cloud developers. Founded in 2015 in Munich and has no known external funding.
Jina AI (jina-ai/jina, 2.7K stars, 393% AGR). Neural search ecosystem for businesses and developers. Founded in 2020 in Berlin and raised $7.5M from GGV Capital, SAP.io, Yunqi Partners.
Dendron (dendronhq/dendron, 1.6K stars, 387% AGR). Note taking tool. Founded in 2019 in Seattle and raised $2M from Fuse VC
Plausible (plausible/analytics, 7.1K stars, 371% AGR). Web analytics (open-source alternative to Google Analytics). Founded in 2018 in Estonia and has no known external funding.
Project Discovery (projectdiscovery/nuclei, 3.5K stars, 362% AGR). Automated cloud-based reconnaissance and monitoring for IT security. Founded in 2019 in Mumbai and raised $1.7M from Accel, SignalFire, Rain Capital.
Tailwind Labs (tailwindlabs/headlessui, 5.6K stars, 359% AGR). Developer of popular US framework Tailwind CSS. Founded in 2017 in Cambridge and has no known external funding.
Vectorized (vectorizedio/redpanda, 1.9K stars, 315% AGR). Event streaming platform (replacement for Apache Kafka). Founded in 2019 in San Francisco and raised $15.5M from Lightspeed, GV
Hummingbot (coinalpha/hummingbot, 1.5K stars, 299% AGR). Bot framework for customizable crypto trading strategies. Founded in 2017 in Mountain View and raised $5.1M from Bain Capital, Collider Ventures, etc
Heartlex (heartexlabs/label-studio, 5.4K stars, 285% AGR). Platform for data labelling. Founded in 2019 in San Francisco and raised $150K from 500 Startups and Creative Destruction Lab.
Modulz (modulz/stitches, 2.3K stars, 282% AGR). Code-based tool for designing and prototyping. Founded in 2019 in Dublin and raised $5.4M from LocalGlobe, Frontline, Tiny VC.

Anyone with a featuring on ROSS Index Q1 2021 can add the badge to their own website to let site visitors know they are one of the fastest-growing open-source startups.

Visit ROSS Index to see the recent top-20 open-source startups.