Updated October 13, 2026 · ShieldCue Editorial Team
Fastmail vs Internxt Universal Technologies SL
Internxt Universal Technologies SL
Facts checked September 26, 2026.
Fastmail vs Internxt Universal Technologies SL: the differences
| Compare |  Fastmail |  Internxt Universal Technologies SL |
|---|---|---|
| Price from | €4Lower | €9.99 |
| Free plan limits | No free plan; 30-day free trial | 1 GB free encrypted cloud storage; Internxt Mail is only available with a premium plan |
| End-to-end encryption | No end-to-end encryption in Fastmail's own apps; PGP or S/MIME only via third-party apps | Emails and attachments in Internxt Mail are end-to-end encrypted with post-quantum and zero-knowledge encryption, so only the user can read them |
| Jurisdiction | AU | ES |
| Open source | No | YesHas it |
| Custom domains | Yes | Not confirmed |
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Key differences
- Price from is lower at Fastmail: €4 vs €9.99.
- Support channels: only Internxt Universal Technologies SL offers Chat, Community.
- Open source: only Internxt Universal Technologies SL.
- Founded is lower at Fastmail: 1999 vs 2020.
Our verdict on each
Fastmail
Fastmail suits readers who want a custom domain and a quick mailbox at a mid-range price, not a privacy-first service with end-to-end encryption in its apps. It ranks 15 on price from among the brands compared here, and its own apps carry no end-to-end encryption.
Internxt Universal Technologies SL
Internxt Universal Technologies SL differs from trust based services by centering control with the user through zero knowledge encryption and open source review. It serves privacy minded people wanting encrypted storage and mail with a no logs approach under one account.
Score breakdown
| Area | Fastmail | Internxt Universal Technologies SL |
|---|---|---|
| Cost | 9.3 | Not confirmed |
| Offer | 8.7Higher | 8.6 |
| Privacy | 8.9Higher | 8.6 |
Cost in a real example
A year on the entry plan
Fastmail
€48
12 × €4
Internxt Universal Technologies SL
€119.88
12 × €9.99
Fastmail costs €71.88 less.
Worked out from the stated prices and rates; your own total depends on how you use it. Facts checked September 26, 2026.
Choosing between them
Pick Fastmail if privacy and price from matter most.
Pick Internxt Universal Technologies SL if open source matter most.
Where they rank in our lists
| Ranking | Fastmail | Internxt Universal Technologies SL |
|---|---|---|
| Privacy tools | 37 of 280 | 57 of 280 |
| Secure email and messaging | 6 of 60 | 11 of 60 |
Licences and countries
| Country | Fastmail | Internxt Universal Technologies SL |
|---|---|---|
| Headquarters | Australia | Spain |
Where these facts come from
Fastmail
- fastmail.com: 10 facts, checked September 26, 2026
Internxt Universal Technologies SL
- internxt.com: 9 facts, checked September 26, 2026
- chromewebstore.google.com: 1 fact, checked September 26, 2026
Every fact side by side
| Fact | Fastmail | Internxt Universal Technologies SL |
|---|---|---|
| Pricing model | Not confirmed | Free |
| Legal entity | Fastmail Pty Ltd | Internxt Universal Technologies SL |
| Headquarters | Australia | Spain |
| Founded | 1999Lower | 2020 |
| Support channels | Email, Help centre | Email, Chat, Help centre, CommunityCovers more |
Privacy tools
| Fact | Fastmail | Internxt Universal Technologies SL |
|---|---|---|
| Free plan | No | YesHas it |
| Platforms | Web, iOS, Android | Google Chrome extension on Windows and macOS |
| Logging policy | Logs technical data such as IP addresses and client identifiers for security, troubleshooting and auditing; IP logs retained for up to one year | Zero-knowledge: passwords and user data are not stored, data encrypted in transit and at rest |
Encrypted storage
| Fact | Fastmail | Internxt Universal Technologies SL |
|---|---|---|
| Free storage | Not confirmed | 1 |
| Zero-knowledge encryption | Not confirmed | Yes |
| Compliance certifications | Not confirmed | ISO 27001:2022, HIPAA, GDPR, SOC 2 |
Where each stands against the rest
| Fact | Fastmail | Internxt Universal Technologies SL | Median |
|---|---|---|---|
| Price from | €4below the median | €9.99above the median | €5.30 |
Median across 15 listed providers.
Pros and cons
Fastmail
Pros
- Custom domains: yes, so mail runs on an address you own rather than a provider address.
- Platform coverage of web, ios and android means a single account works in a browser and on both mobile platforms.
- Founded in 1999 and headquartered in Australia, Fastmail Pty Ltd operates under AU terms.
Cons
- Technical data such as IP addresses and client identifiers is logged for security, troubleshooting and auditing, and IP logs are kept for a retention period.
- Phone support is not among its email and help centre.
Internxt Universal Technologies SL
Pros
- Zero knowledge design keeps passwords and stored content unreadable to others
- Open source code allows public review of privacy and security claims
- End to end encryption protects mail messages and file attachments
Who each suits
Fastmail
Who it suits
- Readers who want mail on a domain they own, since custom domains are supported.
- People who want a single account on web, ios and android and a price to plan around at entry and again at renewal.
Who should look elsewhere
- Readers who compare entry prices with addy.io at $1 or Apple Hide My Email at $0.99 and want the smaller starting figure.
- Anyone who needs a standing no-cost tier, since the free plan is no and the only introductory offer is a trial.
Internxt Universal Technologies SL
Who it suits
- People seeking zero knowledge storage and mail
- Shoppers valuing open source privacy tools
Current offers
Fastmail
Current offer
Free trial
30-day free trial: 30 days free
Try free for up to 30 days; no refunds for unused subscriptions
Source, checked September 26, 2026
Internxt Universal Technologies SL
Current offer
Discount code
Christmas savings - Save 80%: 80% off
Promotional banner applied on the deals and pricing pages; for new customers, free-account customers or lifetime-plan upgraders, no code shown
Source, checked September 26, 2026
Questions about each
Fastmail
How much does Fastmail cost to start?+
The entry plan starts at €4. The free plan is no, and the free plan limits read No free plan; 30-day free trial, so the trial is the only no-cost look. Budget for the paid plan at entry and again at renewal.
Is there a free plan or a free trial?+
The free plan is no, and the free plan limits read No free plan; 30-day free trial, which lists the trial as the only no-cost entry. Nothing carries into a standing account at no charge, so readers who compare services on a permanent no-cost tier should set this one aside.
Internxt Universal Technologies SL
What does Internxt Universal Technologies SL provide?+
Internxt Universal Technologies SL provides encrypted cloud storage plus encrypted mail with attachment support. Stored content receives encryption in transit and at rest under zero knowledge handling. A no logs approach keeps provider access away from user activity.
How does its encryption work?+
Emails and attachments receive end to end encryption with post quantum and zero knowledge protection. Passwords stay outside provider reach because decryption rests with the account holder. Stored files remain encrypted in transit and at rest.