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Martti Malmi

From Satoshipedia, the Satoshi Mail encyclopedia

Martti Malmi, known online as sirius, is a developer from Finland who volunteered to help Satoshi in May 2009. He exchanged more emails with Satoshi than anyone else in this archive.

Working with Satoshi

Malmi wrote to Satoshi in May 2009 after promoting Bitcoin on a forum. Satoshi replied that “your understanding of bitcoin is spot on” and asked for help: “What we need most right now is website writing. My writing is not that great, I'm a much better coder.” (the conversation).

Over the next two years Malmi worked on the bitcoin.org website and FAQ, set up the forum that became BitcoinTalk (“Forum”) and organised translations (“Translation”). In December 2009 he told Satoshi he planned a small exchange service that would take PayPal at first (the email). They corresponded until February 2011.

Publication

Malmi published the emails on his own GitHub page, and nakamoto-archive keeps a copy.[1] Satoshi Mail shows them under his label (open the label).

In the archive

175 messages in 76 conversations with Satoshi.

See also

References

  1. nakamoto-archive, “Complete archive of Satoshi Nakamoto's writings and productions”, GitHub. The README lists each source file with its origin, date and SHA-256 hash.

Primary sources

The messages and commits this article draws on, in Satoshi Mail and where they were first published.

  1. Re: Bitcoin, Private email with Martti Malmi (sirius-m), 2 May 2009. Original source
  2. Forum, Private email with Martti Malmi (sirius-m), 5 November 2009. Original source
  3. Translation, Private email with Martti Malmi (sirius-m), 8 February 2010. Original source
  4. Bitcoin stuff, Private email with Martti Malmi (sirius-m), 22 December 2009. Original source

Published by Tyler Howell for Satoshi Mail. Written with AI assistance from the sources listed above and checked against them. Last updated 22 October 2026. Spotted an error? Email itstylerhowell@gmail.com (how articles are made).

Categories: People · Developers · Correspondents