Proton Mail vs Lark
In short: Proton Mail wins on privacy, Proton Mail wins on price, and they tie on features. The full comparison is below, last checked 23 October 2026.
Should you pick Proton Mail or Lark?
- Proton Mail suits you best if you want end-to-end encryption built in; your mail kept in Switzerland; and the lower price ($3.99 a month, yearly ($4.99 monthly)).
- Lark suits you best if you want to read your mail in any app, such as Apple Mail, Outlook or Thunderbird.
| Feature | Proton Mail | Lark |
|---|---|---|
| Overall | 4.5 | 2.0 |
| Privacy | 5.0 | 0.5 |
| Price | 4.0 | 3.0 |
| Features | 4.5 | 4.5 |
| Cheapest plan | Mail Plus $3.99 a month, yearly ($4.99 monthly) | Basic $6 a user a month, yearly |
| Free plan | Yes, 1 GB, no own domain | Yes, Starter (up to 20 users) |
| Storage | 15 GB | Not confirmed |
| Your own domain | ✓ 1 | ✓ Yes |
| End-to-end encryption | ✓ Built in | No |
| Company based in | Switzerland | Singapore |
| Your data is kept in | Switzerland | Not confirmed |
| Founded | 2014 | Unknown |
| Free trial | Free plan; 30-day refund on paid plans | Free Starter plan |
| Funded by advertising | No | No |
| Works in any mail app | With Proton Bridge on paid plans | ✓ IMAP and SMTP |
| Calendar and contacts | ✓ Yes | ✓ Yes |
| Aliases | 10 addresses | Yes |
| Open-source apps | ✓ Yes | No |
| Sign up without ID | ✓ Yes | No |
| White label | No | Unknown |
| Reader offer | Offer Proton's current deals | None |
| Last checked | 23 October 2026 | 22 October 2026 |
Want to add another? Open this in the compare tool.
How Proton Mail and Lark differ
- Cheapest plans: Proton Mail Mail Plus, $3.99 a month, yearly ($4.99 monthly). Lark Basic, $6 a user a month, yearly.
- For free, Proton Mail gives you a free plan (1 GB, no own domain), and Lark a free plan (Starter (up to 20 users)).
- Proton Mail comes with 15 GB of storage and Lark with storage not confirmed.
- Proton Mail keeps your mail in Switzerland, while Lark keeps it in Not confirmed.
- Proton Mail is based in Switzerland and Lark in Singapore, so different privacy laws apply.
- Proton Mail encrypts mail end to end; Lark doesn't encrypt mail end to end.
- Proton Mail works in other mail apps through Proton Bridge on paid plans, and Lark works in any mail app over IMAP.
- For extra addresses, Proton Mail has 10 addresses and Lark has yes.
Common questions
Which is more private, Proton Mail or Lark?
Proton Mail scores 5 out of 5 for privacy and Lark 0.5. Proton Mail gives you end-to-end encryption built in, your mail kept in Switzerland and open-source apps.
Which is cheaper, Proton Mail or Lark?
Proton Mail is cheaper. Its Mail Plus plan is $3.99 a month, yearly ($4.99 monthly), against $6 a user a month, yearly for Lark's Basic. Proton Mail and Lark also have a free plan. Check the renewal price before you pay, as some first-year prices go up.
Do Proton Mail and Lark work with my own domain?
Yes, both do. Proton Mail: 1 domain on its cheapest plan that allows one. Lark: Yes.
Where do Proton Mail and Lark keep my email?
Proton Mail keeps it in Switzerland. Lark keeps it in Not confirmed.
Do Proton Mail and Lark work in other mail apps?
Proton Mail works in other mail apps through Proton Bridge on paid plans. Lark works in any mail app over IMAP.
Prices and the latest news
I haven't seen either change its price since I started checking on 22 October 2026.
The latest headlines: Proton Mail news · Lark news.
Alternatives to Proton Mail and Lark
Proton Mail vs Tuta · Lark vs Tuta · Proton Mail vs mailbox.org · Lark vs mailbox.org · Proton Mail vs Posteo · Lark vs Posteo
Moving your email
Moving to Proton Mail · Moving from Proton Mail. Or see all my switching guides.