Updated October 13, 2026 · ShieldCue Editorial Team
addy.io vs Internxt Universal Technologies SL
Internxt Universal Technologies SL
Facts checked September 26, 2026.
Where addy.io and Internxt Universal Technologies SL differ
| Compare |  addy.io |  Internxt Universal Technologies SL |
|---|---|---|
| Price from | $1 | €9.99 |
| Free plan limits | Unlimited standard aliases, 10 active shared domain aliases, 1 recipient, 2 alias domains, 10MB monthly bandwidth | 1 GB free encrypted cloud storage; Internxt Mail is only available with a premium plan |
| End-to-end encryption | No end-to-end encryption of stored mail; optional GPG/OpenPGP encryption of forwarded messages to the recipient's own public key, including attachments and optional encrypted subject | 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 | GB | ES |
| Custom domains | Yes | Not confirmed |
Same on both: Open source (Yes).
We earn a commission when you sign up through links on this site. Partner status can affect where a brand appears in our rankings.
Key differences
- Support channels: only Internxt Universal Technologies SL offers Chat.
- Pricing model: only addy.io offers Budget.
Our verdict on each
addy.io
addy.io suits people who want a fresh address for every site without a new mailbox for each one, and it starts on a free plan. Paid tiers begin at $1, under the €4.38 secure email median, though stored mail is not end-to-end encrypted.
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 | addy.io | Internxt Universal Technologies SL |
|---|---|---|
| Cost | 9.9Entry is $1 against a €4.38 secure email median, and the free plan covers unlimited standard aliases. | Not confirmed |
| Offer | 9.1Higher | 8.6 |
| Privacy | 9.5Higher | 8.6 |
Where they rank in our lists
| Ranking | addy.io | Internxt Universal Technologies SL |
|---|---|---|
| Privacy tools | 63 of 280 | 57 of 280 |
| Secure email and messaging | 13 of 60 | 11 of 60 |
Licences and countries
| Country | addy.io | Internxt Universal Technologies SL |
|---|---|---|
| Headquarters | United Kingdom | Spain |
Every fact side by side
| Fact | addy.io | Internxt Universal Technologies SL |
|---|---|---|
| Pricing model | Free, BudgetCovers more | Free |
| Legal entity | Not confirmed | Internxt Universal Technologies SL |
| Headquarters | United Kingdom | Spain |
| Founded | Not confirmed | 2020 |
| Support channels | Email, Help centre, Community | Email, Chat, Help centre, CommunityCovers more |
Privacy tools
| Fact | addy.io | Internxt Universal Technologies SL |
|---|---|---|
| Free plan | Yes | Yes |
| Platforms | iOS, Android, Web, Chrome, Firefox, Edge, Safari, Raycast | Google Chrome extension on Windows and macOS |
| Logging policy | Self-hosted Umami analytics with no cookies or personal data, no Google Analytics; Nginx access and error logs record IP addresses, rotated daily and retained 3 days, used only to improve the service and prevent abuse | Zero-knowledge: passwords and user data are not stored, data encrypted in transit and at rest |
Encrypted storage
| Fact | addy.io | 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 |
Pros and cons
addy.io
Pros
- The free plan allows unlimited standard aliases, plus shared domain aliases and alias domains, so building a large set of addresses costs nothing.
- Custom domains are supported, so aliases can sit on a domain you already own instead of a shared one.
- Open source, so the alias and forwarding logic can be read and checked by anyone.
Cons
- Support runs on email, help centre and community, so anything urgent waits for a written reply or a community thread.
- The free plan's recipient limit and monthly bandwidth allowance are tight, so more than light forwarding means paying.
- Jurisdiction is GB, which puts the contract and any dispute under a single country's rules.
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
addy.io
Who it suits
- People signing up to lots of sites who want a new alias for each and can begin on the free plan.
- Readers who want custom domains on an address they own, with apps across browsers rather than a system-level setting.
- Users happy to forward mail onward and who judge the service on open source and price rather than on encrypted storage.
Who should look elsewhere
- Anyone who needs end-to-end encrypted mail storage: addy.io encrypts only forwarded messages, and Posteo at €1 is the other option here at a close entry price.
- Apple users already set up inside that ecosystem, where Apple's alias generator at $0.99 is the shorter path, while addy.io's $1 buys open source aliases across iOS, Android and Web.
Internxt Universal Technologies SL
Who it suits
- People seeking zero knowledge storage and mail
- Shoppers valuing open source privacy tools
Current offers
addy.io
Current offer
Discount code
Notesnook 25% off first year: 25% off first year
addy.io paid subscribers (Lite, Pro, Duo or Family) only; no commission received by addy.io
Source, checked September 26, 2026
Free trial
Windscribe 3 month Pro trial then annual Pro plan: 3 month Pro trial, then 49 USD per year
addy.io paid subscribers only
Source, checked September 26, 2026
Free trial
Kagi 3 months of Professional plan free: 3 months free
addy.io paid subscribers only
Source, checked September 26, 2026
Discount code
Tuta 25% off first year: 25% off first year
addy.io paid subscribers only
Source, checked September 26, 2026
Discount code
EasyOptOuts 25% off for life: 25% off for life, 5 sign-ups per coupon
US customers only; addy.io paid subscribers only
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
addy.io
Is there a free plan, and what comes with it?+
Yes. The free plan allows unlimited standard aliases, and adds shared domain aliases, alias domains, a recipient limit and a monthly bandwidth allowance. That is enough for light use without paying anything. Beyond that, paid plans in the free and budget range start at $1.
How much does addy.io cost at the entry point?+
Entry is $1, which sits under the €4.38 median for secure email brands and below the €8.94 upper marker. You can also stay on the free plan as long as the allowance suits, which is the practical way to judge the service first.
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.