GoldKey Mail vs FlowCrypt
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GoldKey Mail
This service offers secure, cloud-based email access across all your devices. It features a spam-free inbox, a secure calendar for event management and sharing, and tools for group communication and data sharing. You can also use your own domain name for encrypted email.
- Cloud-encrypted email
- Syncs across devices
- Secure calendar
- Spam-free inbox
- Group mail and sharing
- Custom domain support
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The GoldKey Mail service is secure, fast, easy to use, and has been optimized to help you better read, organize, and send email. Note: You must have an active GoldKey subscription to use this service. Access Email on All Your Devices Securely access your email from your computer, phone, or tablet. Since GoldKey Mail is cloud-based, all your devices stay in-sync automatically. Secure Calendar GoldKey Mail includes a secure calendar that makes it easy to keep track of personal and work-related events across all of your devices. Create reoccurring or one-time events, with or without attachments, and share them securely with co-workers. The people you invite will have the ability to accept or decline your invitation and you’ll be kept informed about their decisions as they are made. SPAM-Free Inbox With GoldKey Mail, your inbox can only be reached by invitation or by another secure email account. When email arrives from an unverified source, it is placed in the Junk folder to ensure that the only mail reaching your inbox is mail you want to receive. When you find an important email in the Junk Folder, you can mark the sender address or the entire domain as “not junk.” Once you mark the message, it will be moved to your inbox and future email from that sender will be delivered directly to your inbox. Group Mail, Sharing, & Collaboration Emails can be easily sent to entire groups of contacts using GoldKey Groups. GoldKey provides a way to easily create user groups and invite people to them. These groups are used for securely sharing data, both in GoldKey Vaults and in your inbox. Use Your Own Domain Name Get encrypted email @yourcompany.com. GoldKey Mail makes it easy to set up email accounts using your own private domain.
FlowCrypt
Easily encrypt your emails and attachments with PGP for enhanced privacy on Gmail. This app simplifies end-to-end encryption, making it accessible even without technical knowledge of cryptography. Secure your communications and files effortlessly.
- End-to-end PGP email encryption
- Secure attachment encryption
- Key generation and secure storage
- Encrypted drafts
- Password-protected encrypted messages
- Compatibility with OpenPGP standards
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Simple end-to-end encryption to secure email and attachments on Gmail. - Sets up in a few taps - Lets you use PGP encryption by generating a private and public key directly on your iPhone or iPad - Your keys are stored securely in iOS Keychain - You can choose to save your key passphrase on device or enter it as needed - Drafts are encrypted before saving to Gmail - Send messages encrypted with password to users who don't have PGP There are a few ways this encryption app stands out: - Easy email encryption that just works. - Anyone can use it. We've worked to ensure every single way possible that email encryption can be confusing has been removed, so that more people can encrypt Gmail. - You can send encrypted attachments. Text files, powerpoint slides, excel documents, image files, any and all files and attachments can be sent privately. - No understanding of cryptography needed. Don’t know what a public key is? You don’t need to know to secure your email with FlowCrypt. Power users with an existing public key are also served. Whether you have struggled with other ways to encrypt email or you are trying email encryption for the first time, you will find this a very simple secure email solution thanks to PGP. PGP stands for Pretty Good Privacy it's the standard for secure email encryption. This Gmail end-to-end encryption app lets you encrypt Gmail messages anytime your email security and privacy matters, without having to think about it. Most email providers don't give you the level of privacy that we should expect. That is why we created the FlowCrypt app that lets you encrypt google email without needing to learn anything new. Email PGP encryption has been historically a very difficult area, which few people used because there was no easy PGP solution around. If you were asked for a Public Key or a PubKey so that others can encrypt messages for you, just install FlowCrypt and you will find your new Public Key in the settings. Also, file encryption is fully supported. To encrypt an attachment just open a compose screen, add the recipient's email, and attach a file. If they have encryption set up on their end, that's it - just send the encrypted email out. PGP or the OpenPGP is a standard for encrypted communication used by more than 10 million people. FlowCrypt is compatible with most OpenPGP software out there. Looking forward to your feedback! Email us at human@flowcrypt.com as we're improving the app every day. Website: https://flowcrypt.com/ Source code: https://github.com/FlowCrypt/ Documentation: https://flowcrypt.com/docs/
Screenshots
Verdict
The clearest difference is rating: GoldKey Mail at 5.0 against FlowCrypt's 3.3. GoldKey Mail also leads on ratings volume (13 vs 4) and iOS requirement (9.0 vs 15.0). FlowCrypt's advantage is monetization model (free vs subscription). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
GoldKey Mail holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 13 and 4 respectively.
GoldKey Mail ships an update every 2 months, FlowCrypt every 4 months. The most recent releases landed on November 2, 2026 and November 14, 2026 respectively.
| Parameter | GoldKey Mail | FlowCrypt |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (13 ratings) — better | 3.3 (4 ratings) |
| Positive reviews | — | 50.0% of reviews |
| Number of ratings | 13 — better | 4 |
| Update frequency | Every 2 months — better | Every 4 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 8 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | GoldKey Security Corporation | FlowCrypt a. s. |
Customer experience
GoldKey Mail
FlowCrypt
In-app purchases
GoldKey Mail
No in-app purchases
FlowCrypt
No in-app purchases









