FlowCrypt: Encrypt Gmail with PGP

Simple end-to-end encryption to secure email and attachments on Google.

Users70K

Rating4.7

Reviews361

Manifest versionV3

7-day growth0

7-day growth rate0%

Preview

FlowCrypt: Encrypt Gmail with PGP Media preview

6 assets

Trend

30-day user trend

Review user movement over the last 30 days.

User Growth Over Time

Rating trend

30-day rating change

Track rating movement over time to see whether quality signals remain stable.

30-day rating change

Start

4.72

Latest

4.72

30-day rating change

0.00

2026年5月28日2026年6月3日

Growth overview

Daily, weekly, and monthly growth

Compare 1-day, 7-day, and 30-day net growth and growth rate.

1-day growthFlat

00%

7-day growthFlat

00%

30-day growthDeclining

-10K-12.5%

Technical snapshot

Version, languages, and crawl freshness

Review publication date, version, supported languages, and crawl timestamps.

Version8.5.13

ManifestV3

Size3.64MiB

Languages1English

Published--

Store updated--

Last crawled--

Overview

Product summary

Review the store description, core capabilities, and common use cases.

🟢 A simple end-to-end encryption to secure your emails and attachments on Google, including Google Workspace, Business, and Enterprise using OpenPGP.

🟢 FlowCrypt lets you use PGP encryption by generating a private and public key. It uses the recipient’s public key to encrypt the email, and only the recipient’s private key can decrypt the message and reveal its content.

🟢 Adds a Secure Compose button to Gmail, allowing you to send private PGP-encrypted emails when you choose to.

🟢 We update the extension regularly (see the "Updated" field to the right).

FlowCrypt allows you to:

✔ Set up the extension in just a few clicks.

Reviews

Recent review snapshot

Inspect the latest comments and rating distribution.

The Chrome Web Store shows 361 reviews, but only 0 review bodies have synced into ExtScope so far. Showing the synced reviews available right now.

5★

4★

3★

2★

1★

Similar and related extensions

Review related products from the Chrome Web Store detail page.

Mailvelope - Secure your email with PGP

Communication

Protect your email conversations and attachments on Gmail, Nextcloud, Outlook & more with PGP and end-to-end encryption.

Simplify Gmail

Workflow & Planning

Make Gmail simpler, more capable, and more respectful

SimpleLogin by Proton: Secure Email Aliases

Workflow & Planning

Easily create a different email for each website to hide your real email. Protect your inbox against spams, phishing, data breaches

Virtru Email Protection

Privacy & Security

Surprisingly easy email protection and control for Gmail.

SendSafely Encryption for Chrome and Gmail

Communication

Chrome extension that provides end-to-end encryption for Gmail. Encrypt private emails and securely share files up to 10GB.

Encrypt any email with CipherMail

Privacy & Security

Encrypt any email message using the S/MIME and certificates technology with CipherMail

AI product read

PGP end-to-end email encryption for Gmail via a Chrome extension

Enables users to send and receive PGP-encrypted emails and attachments directly within Gmail, securing email communications against interception

User installs extension → authenticates with Google OAuth → extension generates or imports PGP keys → user composes email in Gmail → clicks Secure Compose button → extension encrypts message with recipient's public key → recipient decrypts with their private key. The extension injects content scripts into mail.google.com to add encryption UI directly in Gmail's interface.

Target users: Gmail users who need end-to-end email encryption / Google Workspace/Enterprise users handling sensitive communications / Privacy-conscious individuals and organizations

The changelog.txt references historical subscription and checkout functionality from 2017-2018 that appears to have been removed from the current codebase - could not verify if FlowCrypt has external paid plans on their website that integrate with the extension

Monetization

No paid features detected

No evidence of paid feature gating within the extension. Searches for 'premium', 'subscription', 'payment', 'billing', 'checkout', 'upgrade', 'stripe' in the source code returned no meaningful results (only HTTP status code constants, library wordlists, and historical changelog entries). The extension is open-source on GitHub (FlowCrypt/flowcrypt-browser). FlowCrypt may offer enterprise plans on their website, but the extension itself does not gate features behind payment or call any billing/license APIs.

Confidence: 90
Payment platform: --
Source: AI / High
Login required: Yes
Reason: The extension requires Google OAuth authentication to access Gmail for sending/receiving encrypted emails. The manifest requests the 'identity' permission, and the source code implements full Google OAuth flow (GoogleOAuth.newAuthPopup) with scopes for gmail.compose, gmail.modify, email, openid, and profile. The setup flow requires acctEmail and idToken, and the popup redirects to setup if no account is configured. The core workflow of encrypting/decrypting Gmail messages requires being authenticated with a Google account.

Permission risk

Medium-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：storage、tabs、scripting
站点访问范围较广（8 项）
同时具备浏览数据与站点访问能力

Publisher

flowcrypt-release

Tomas Holub

Email: [email protected]
Phone: +420799558821
Address: Londynska 7 Praha 2 12000 CZ

Public contact fields are shown above. Developer portfolio pages are available on paid accounts.

View developer portfolio

Permissions

Host access