Open source focus

Open Source Alternatives to Dappemail

26 open source Decentralized Email options similar to Dappemail, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Every company listed publishes its source: each one carries an open source sector tag and a public GitHub repository.

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Open Bitcoin Tracker23
Fintech
A privacy-focused, open-source Android app to track Bitcoin value without accounts or analytics.
Open source · Self-hostable
Blockmesh Network31
BlockchainIsrael, Israel
Decentralized data infrastructure and AI framework for AI training, inference, and ecosystem intelligence.
Open source · Self-hostable
DIMO59
Connected VehiclesBrooklyn, United States$20.5M
DIMO is a decentralized vehicle data network that empowers car owners to collect, control, and monetize their vehicle data, enabling developers to build mobility applications.
Open source
ChainSafe Systems57
Web3Toronto, Canada$18.8M
Leading Web3 infrastructure firm specializing in protocol engineering, cross-chain interoperability, and Web3 gaming.
Open source · Self-hostable
Akash Network56
DePINSan Francisco, United States$2.0M
Decentralized cloud marketplace for compute resources, leveraging blockchain technology (DePIN).
Open source · Self-hostable
Cardano55
Blockchain
A secure, scalable, and sustainable proof-of-stake blockchain platform for decentralized applications and smart contracts.
Open source · Self-hostable
Archimedes52
Fintech$7.3M
Open-source lending protocol for superior capital efficiency in Decentralized Finance (DeFi).
Open source · Self-hostable
Mycroft AI38
Voice AssistantKansas City, United States$4.0M
Open-source, privacy-focused voice assistant and AI platform.
Open source · Self-hostable
Faremeter22
Fintech
Open-source framework enabling autonomous AI agents to make frictionless web3 payments via web2 infrastructure.
Open source · Self-hostable
Manyverse21
Decentralized Social Network
Manyverse is a social network client that uses a peer-to-peer protocol, allowing users to create and share content offline and without central servers.
Open source · Self-hostable
Novapanda20
Fintech
VDC verifiable delivery certificates with open protocols, open source specifications, and mock trial nodes online.
Open source
x402scan10
Fintech
An ecosystem explorer and analytics platform for the x402 protocol and agentic commerce.
Open source · Self-hostable
Signal9
MessagingWashington, United States
End-to-end encrypted messaging and voice calling app focused on privacy and security.
Open source
Off Grid9
Edge AI
Off Grid runs AI models directly on your phone, ensuring privacy and local processing.
Open source · Self-hostable
Kryptvakt8
Cybersecurity
Kryptvakt offers a secure, decentralized platform for managing and sharing sensitive data.
Open source
GrapheneOS
Operating SystemToronto, Canada
A privacy and security-focused mobile operating system based on Android.
Open source · Self-hostable
Nous Research63
Artificial IntelligenceSan Francisco, United States$145.0M
Open-source AI research lab training decentralized large language models on Solana blockchain
Open source · Self-hostable
Mozilla Firefox54
InternetSan Francisco, United States$2.3M
Open-source web browser focused on privacy, user control, and an open internet.
Open source · Self-hostable
Archestra.AI50
Artificial IntelligenceLondon, United Kingdom$10.0M
An open-source platform enabling enterprises to securely connect sensitive data to AI agents.
Open source · Self-hostable
Velum Labs49
Machine LearningSan Francisco, United States$500K
Firewall that controls access to information across AI and humans
Open source · Self-hostable
Pomvox21
Voice AI
Press a key, talk, and clean text appears at your cursor, transcribed on the Apple Neural Engine. Free, open source, and fully private.
Open source
Linux Foundation15
Open SourceSan Francisco, USA
A non-profit technology consortium supporting the development of Linux and other open-source software projects.
Open source · Self-hostable
Openmetaverse11
Metaverse Interoperability
A non-profit organization dedicated to fostering open standards and software for a scalable, interoperable, and vendor-neutral metaverse.
Open source
Codius AI10
Smart ContractsSan Francisco, United States
An open-source hosting protocol for smart programs and decentralized applications.
Open source
Plainva9
Open Source
A local-first, open-source Markdown editor that syncs notes through your own cloud storage.
Open source
Whonix9
Operating System
A free, open-source, and hardened Linux distribution for advanced anonymity and security online.
Open source

Company	Sector	License	HQ	Funding	Score
Open Bitcoin TrackerA privacy-focused, open-source Android app to track Bitcoin value without accounts or analytics.	Fintech	Open source · Self-hostable	—	—	23
Blockmesh NetworkDecentralized data infrastructure and AI framework for AI training, inference, and ecosystem intelligence.	Blockchain	Open source · Self-hostable	Israel, Israel	—	31
DIMODIMO is a decentralized vehicle data network that empowers car owners to collect, control, and monetize their vehicle data, enabling developers to build mobility applications.	Connected Vehicles	Open source	Brooklyn, United States	$20.5M	59
ChainSafe SystemsLeading Web3 infrastructure firm specializing in protocol engineering, cross-chain interoperability, and Web3 gaming.	Web3	Open source · Self-hostable	Toronto, Canada	$18.8M	57
Akash NetworkDecentralized cloud marketplace for compute resources, leveraging blockchain technology (DePIN).	DePIN	Open source · Self-hostable	San Francisco, United States	$2.0M	56
CardanoA secure, scalable, and sustainable proof-of-stake blockchain platform for decentralized applications and smart contracts.	Blockchain	Open source · Self-hostable	—	—	55
ArchimedesOpen-source lending protocol for superior capital efficiency in Decentralized Finance (DeFi).	Fintech	Open source · Self-hostable	—	$7.3M	52
Mycroft AIOpen-source, privacy-focused voice assistant and AI platform.	Voice Assistant	Open source · Self-hostable	Kansas City, United States	$4.0M	38
FaremeterOpen-source framework enabling autonomous AI agents to make frictionless web3 payments via web2 infrastructure.	Fintech	Open source · Self-hostable	—	—	22
ManyverseManyverse is a social network client that uses a peer-to-peer protocol, allowing users to create and share content offline and without central servers.	Decentralized Social Network	Open source · Self-hostable	—	—	21
NovapandaVDC verifiable delivery certificates with open protocols, open source specifications, and mock trial nodes online.	Fintech	Open source	—	—	20
x402scanAn ecosystem explorer and analytics platform for the x402 protocol and agentic commerce.	Fintech	Open source · Self-hostable	—	—	10
SignalEnd-to-end encrypted messaging and voice calling app focused on privacy and security.	Messaging	Open source	Washington, United States	—	9
Off GridOff Grid runs AI models directly on your phone, ensuring privacy and local processing.	Edge AI	Open source · Self-hostable	—	—	9
KryptvaktKryptvakt offers a secure, decentralized platform for managing and sharing sensitive data.	Cybersecurity	Open source	—	—	8
GrapheneOSA privacy and security-focused mobile operating system based on Android.	Operating System	Open source · Self-hostable	Toronto, Canada	—	—
Nous ResearchOpen-source AI research lab training decentralized large language models on Solana blockchain	Artificial Intelligence	Open source · Self-hostable	San Francisco, United States	$145.0M	63
Mozilla FirefoxOpen-source web browser focused on privacy, user control, and an open internet.	Internet	Open source · Self-hostable	San Francisco, United States	$2.3M	54
Archestra.AIAn open-source platform enabling enterprises to securely connect sensitive data to AI agents.	Artificial Intelligence	Open source · Self-hostable	London, United Kingdom	$10.0M	50
Velum LabsFirewall that controls access to information across AI and humans	Machine Learning	Open source · Self-hostable	San Francisco, United States	$500K	49
PomvoxPress a key, talk, and clean text appears at your cursor, transcribed on the Apple Neural Engine. Free, open source, and fully private.	Voice AI	Open source	—	—	21
Linux FoundationA non-profit technology consortium supporting the development of Linux and other open-source software projects.	Open Source	Open source · Self-hostable	San Francisco, USA	—	15
OpenmetaverseA non-profit organization dedicated to fostering open standards and software for a scalable, interoperable, and vendor-neutral metaverse.	Metaverse Interoperability	Open source	—	—	11
Codius AIAn open-source hosting protocol for smart programs and decentralized applications.	Smart Contracts	Open source	San Francisco, United States	—	10
PlainvaA local-first, open-source Markdown editor that syncs notes through your own cloud storage.	Open Source	Open source	—	—	9
WhonixA free, open-source, and hardened Linux distribution for advanced anonymity and security online.	Operating System	Open source	—	—	9