Startmail vs Fastmail: Privacy Comparison
This in-depth comparison weighs Startmail against Fastmail along six decisive privacy dimensions: how data is collected, how encryption is implemented, how data is shared with third parties, what privacy controls users get, how transparent each service is, and what their historical track record looks like. The two cover much the same ground, yet they handle user privacy in very different ways. What our review shows is that Startmail delivers a clearly stronger privacy experience on balance, even though each option has its own relative pluses and minuses that are worth examining closely.
Who Wins, and Why
The most useful starting point is the overall tally and the single dimension that decided it. Across the six privacy dimensions we score, Startmail finishes ahead of Fastmail, 41/60 to 35/60. That total reflects a side-by-side review in which one service is consistently the more privacy-respecting choice, even though both cover the same functional ground.
The largest single-dimension gap is in Data Collection, where Startmail leads by 1 point -- Startmail 6/10 to Fastmail 5/10. On Data Collection the margin nearly vanishes: Startmail 6/10 against Fastmail 5/10. The deeper analysis that follows shows how the lead was built.
What Gets Collected
Data collection is the foundation of any privacy assessment. The extent to which a service collects, retains, and processes user data directly determines the privacy risks associated with its use. Startmail demonstrates more restrained data collection practices, gathering only the minimum data necessary for service functionality. The other service collects a broader range of data including behavioral patterns, device identifiers, and usage analytics that extend beyond core service requirements. We scored Startmail 6/10 and Fastmail 5/10 in this category. The difference reflects not just the volume of data collected but the purpose and necessity of that collection.
Encryption Standards
Encryption protects user data both in transit and at rest, and the implementation quality varies dramatically between services. Startmail implements stronger encryption measures, including more robust protocols for data in transit and better protection for stored data. The specific encryption implementations differ in their coverage (which data is encrypted), their strength (which algorithms and key lengths are used), and whether end-to-end encryption is employed (preventing even the service provider from accessing user content). Startmail scored 7/10 while Fastmail scored 6/10 for encryption.
Sharing Data With Outside Parties
A service's willingness to hand data to outside parties is a make-or-break privacy factor. That covers advertising networks, analytics providers, business partners, and what happens when governments come asking. Startmail keeps a tighter lid on who can reach user data. These sharing habits shape security as much as privacy, since every extra party granted access becomes one more way a breach could happen. Scores: Startmail 8/10, Fastmail 7/10.
User Privacy Controls
How much say people have over their own data depends on whether the privacy controls a service offers are both present and actually useful. That spans opt-out switches for data collection, the ability to download and delete information, fine-grained permission settings, and how simply users can act on the rights granted to them under relevant privacy regulations. Startmail delivers broader, easier-to-reach privacy controls. Scores: Startmail 9/10, Fastmail 8/10.
How Clearly They Explain Themselves
Transparency encompasses how clearly each service communicates its data practices. This includes the readability of privacy policies, the publication of transparency reports, responsiveness to privacy inquiries, and proactive communication about policy changes. Startmail demonstrates stronger transparency overall. Clear, accessible privacy communication is essential for informed consent and trust. Scores: Startmail 5/10, Fastmail 4/10.
What Their History Reveals
The record of privacy incidents, regulatory run-ins, and how a service answers vulnerabilities offers context you cannot ignore. Startmail holds the stronger track record here, with a smaller count of incidents and a more responsible response to the problems that did surface. More often than not, what a service did in the past is the best guide to its future privacy conduct. Scores: Startmail 6/10, Fastmail 5/10.
Overall Verdict
When the full analysis is tallied, Startmail finishes at 41/60 and Fastmail at 35/60. On privacy grounds, the overall winner is Startmail. Both products meet similar functional needs, yet the winner brings a more privacy-respecting approach to the dimensions that carry the most weight. Still, perfection is off the table for any service, so no matter which you choose you should actively set up its privacy options. Our advice is to round out your pick with additional privacy tools, a VPN, DNS-level ad blocker, and privacy-focused browser, to assemble a thorough privacy posture. Should your threat model call for the strongest privacy possible, weigh whether an even more privacy-focused alternative exists in this category beyond the two compared here.