A Completely Reimagined Inbox
Finally, an email client designed to make things easy.
Just sign in with your existing Gmail account.
A World Without Robots
Can't find what you're looking for in a sea of corporate spam?Just use Sigma's "Robot Filter" to temporarily hide all the noise.
Easily hide senders with mute and block
No need to track down "unsubscribe" links or make email rules.
An Instantly Organized Inbox
Easily combine filters to cut through the noise
Privacy In Everything We Do
Every feature is built with security and privacy as a top priority.
Your Data Stays Yours
All emails are encrypted and stored on your device, not our servers.
Tracker Protection
JavaScript and web trackers in your emails are blocked.
No Secret AI Training
Your email data is never shared or exploited without asking your permission.
CASA Tier 2 Certified
We passed Google's rigorous third-party security audit for data protection.
Connect With Our Team
Talk directly to the founders. Be heard.
Join Our Discord
Connect with our community, get support, and share your feedback in real-time.
Come hang out!Free Early Access
While we will probably charge for premium features in the future, our commitment is to keep the core functionality free, powerful, and accessible to everyone.We believe that everyone deserves a better email experience.
Free
Everything you need for better email management
- Powerful email management tools
- 100% ad-free experience
- No data collection
- Your data stays private
No credit card needed, just jump in
Frequently Asked Questions
If you can't find what you're looking for, send us an email.
Sigma is an email client for Gmail (other providers coming soon!) that aims to make email management extremely easy.
We believe that email overwhelm is not a personal problem, it's a software problem. Becoming "faster", more "productive", or following "systems" (Inbox Zero, GTD, email rule whack-a-mole, etc) is not going to solve the fundamental problem - existing email tools are not doing everything they can to make it easy for you.
No, currently we only support Gmail.
We do have plans to release support for other common email services.
Yes. We have met or exceeded a CASA Tier 2 security audit required by Google in order to access your Gmail account. We are also backed by Gmail security for things such as 2FA, SSO, and malicious email filtering.
Your email data is encrypted and stored on your device. Sigma servers do not retain your emails. In other words, your email data is yours.
No. We do not touch your Gmail inbox. However, if you choose to send email through Sigma, we send those emails from your Gmail account and they will appear in your Gmail sent folder. If you decide to leave us, your Gmail inbox will be exactly how you left it.
No. Sigma uses your existing email address.
No. Sigma employees do not have access to any of your emails.
They are accessed through the Gmail API and then stored on your device. Sigma servers only retain minimal information required to run the service.
You have the same storage limits as your Gmail account.
Sigma adheres to the Google API Services User Data Policy, including the limited use requirements. For specific information on how data is collected and stored, please see our Terms of Service and Privacy Policy.
We are very sad to see you go. You can delete your account from the account management page inside of Sigma, or you can contact us at matt.gogan@pocketcity.app to have your account and data deleted.