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About Synonym
Synonym is a Bitcoin ecosystem developer focused on building decentralized alternatives to Big Tech and traditional finance. Its core business centers on three products: Bitkit, a self-custodial Bitcoin and Lightning Network wallet; Slashtags, a protocol for portable identity and data; and Blocktank, a Lightning service provider offering instant channel and liquidity solutions.
The core narrative is the "Atomic Economy" — a vision where individuals own their identity, money, and data through cryptographic keys, without relying on intermediaries. The pain points addressed include centralized control over digital identity, censorship of data, and the complexity of using Lightning Network for payments. Synonym solves these by providing open-source tools that enable self-sovereign identity, peer-to-peer payments, and easy Lightning integration for businesses.
In the past six months (2026-03-12 to 2026-09-12), Synonym has focused on maturing its product suite. Pubky, its self-sovereign identity and social graph protocol, has seen active development with the Pubky Core open-sourced and Pubky Ring (a mobile keychain) released. Bitkit has continued to evolve as a mobile wallet, while Blocktank has expanded its Lightning infrastructure services. The team has also promoted peer-to-peer credit systems like PearCredit, aiming to broaden Bitcoin's utility beyond simple payments.
In the past six months, Synonym focused on user adoption. In April 2026, the team held a marketing hackathon in Prague to explore how to bring self-sovereign identity and Bitcoin tools to a broader audience. Experiments fell into four buckets: onboarding (one-click login, Bitkit milestone incentives), distribution (embeddable comment widget, link-in-bio pages, invite-a-friend), identity & ownership (censorship-resistant payment pages, data monetization), and content marketing (short film, quiz sites, cross-posting integrations). The key-as-domain DNS installer hit Hacker News after launch; the link-in-bio page and one quiz site are live. The official future focus is no longer just building tech but driving network effects, getting existing users to bring in the next ones, and ensuring credible alternatives exist when users face censorship or deplatforming.
John Carvalho, co-founder and CEO of Synonym (Twitter: @BitcoinErrorLog), is a prominent Bitcoin and Lightning Network advocate. He previously supported reducing Bitcoin's block size to 300KB to drive Lightning adoption, but now favors moderate block size increases, arguing high fees cause centralization. Under his leadership, Synonym develops Bitkit, Pubky, and Blocktank, advancing the 'Atomic Economy' vision. Founded in 2020 and headquartered in Lisbon, Synonym operates with a remote team across 20+ countries. No reliable public information is available for other co-founders or core executives.