Fastmail vs Mailbox.org Comparison

Feature	Fastmail Visit →	Mailbox.org Visit →
Overview
Rating	6.8	6.8
Pricing	$5.00/moIndividual (monthly) $5.00/moIndividual (annual) $8.00/moDuo (annual) $11.00/moFamily, up to 6 (annual) Show billing detailsHide billing details Individual (monthly): US$5/mo Individual (annual): US$60 for 12 months Duo (annual): US$96 for 12 months Family, up to 6 (annual): US$132 for 12 months	$1.00/moLight (individual, annual) $3.00/moStandard (individual, annual) $9.00/moPremium (individual, annual) Show billing detailsHide billing details Light (individual, annual): EUR 12/year billed annually Standard (individual, annual): EUR 36/year billed annually (EUR 4/month if billed monthly) Premium (individual, annual): EUR 108/year billed annually (EUR 12/month if billed monthly)
Free tier	Paid only	Paid only
Established	1999	2014
Platforms	WindowsmacOSLinuxAndroidiOS	Not specified
Privacy
Jurisdiction	Australia Show detailsHide details Fastmail Pty Ltd, PO Box 234, Collins St West, VIC 8007, Australia, ABN 31 142 646 580, headquartered in Melbourne. Also operates Fastmail US LLC, a satellite office at 1429 Walnut Street, 12th Floor, Philadelphia, PA 19102, USA. Independent and employee-owned — not venture-backed or acquired by a larger group.	Germany Show detailsHide details Heinlein Hosting GmbH, Schwedter Strasse 8/9A, 10119 Berlin. Registered at the District Court of Berlin-Charlottenburg, HRB 220010 B. Managing director Peer Heinlein, also CEO of the parent Heinlein Group, founded 1989.
Independent security audit	None on record	None on record
Source code	Partly open source	Partly open source
Zero-access encryption	No	No
Intra-provider E2EE	No	No
External PGP	Manual import	Native
Past data breach	No	No
Telemetry	On unless you opt out	On unless you opt out
Features
Hosting	Cloud	Cloud
Custom domain support	Yes	Yes
Aliases	Unlimited	Limited
Anti-spam approach	Connection-level blocking of known spam-sending infrastructure before a message is accepted, followed by content-based scoring of accepted mail with a threshold that routes high-scoring messages to Spam; the filter adapts per user from Report spam / Not spam / delete / archive actions. Documented on the vendor's own Stop Spam help page as analysing message content server-side, consistent with a provider that holds the encryption keys and makes no zero-access claim.	Multi-stage malware and spam scanning at mail transport time, before any optional PGP encryption is applied, combined with SPF, DKIM, DMARC, DNSSEC, DANE and MTA-STS at the protocol level; no content-scanning of already-encrypted mailbox data is described.
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