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Help users in Iran reconnect to Signal

Just over a week ago, we announced that Iranian censors had started blocking all Signal traffic in the country. As an interim solution to help people in Iran get connected again, we’ve added support in...

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Help us test payments in Signal

The latest Signal betas are rolling out today. Inside, you’ll find performance enhancements, a slew of bug fixes, improvements to the mute settings, and if you’re in the United Kingdom, you’ll see...

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Update on beta testing payments in Signal

As the world stands today, the future of transaction privacy does not look great. The existing landscape is dominated by traditional credit companies, who over the past decade have been steadily...

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Exploiting vulnerabilities in Cellebrite UFED and Physical Analyzer from an...

Cellebrite makes software to automate physically extracting and indexing data from mobile devices. They exist within the grey – where enterprise branding joins together with the larcenous to be called...

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The Instagram ads Facebook won't show you

Companies like Facebook aren’t building technology for you, they’re building technology for your data. They collect everything they can from FB, Instagram, and WhatsApp in order to sell visibility into...

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Embrace ephemerality with default disappearing messages

As the norms for how people connect have changed, much of the communication that once took place through the medium of coffee shops, bars, and parks now takes place through the medium of digital...

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Improving first impressions on Signal

The phenomenon of unsolicited and unwanted messaging dates back to the earliest communication platforms: from prehistoric cave graffiti and postal chain letters to popup ads and robocalls. To prevent...

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Become a Signal Sustainer

Signal has no data to sell, no advertisers to sell it to, and no shareholders to benefit from such a sale. We’re building a different kind of tech – where your data stays in your hands – but we’re also...

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How to build large-scale end-to-end encrypted group video calls

Signal released end-to-end encrypted group calls a year ago, and since then we’ve scaled from support for 5 participants all the way to 40. There is no off the shelf software that would allow us to...

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New year, new CEO

It’s a new year, and I’ve decided it’s a good time to replace myself as the CEO of Signal.I have now been working on Signal for almost a decade. It has always been my goal for Signal to grow and...

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You Can Change Your Number

Millions of people worldwide rely on Signal every day for secure and private communication. Some of these people change their phone number, but want to continue using Signal without registering for a...

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Signal Your Support

People around the world count on Signal for things as simple as sharing moments of celebration like a graduation or as high stakes as coordinating a protest. We’ve got your back no matter what! As...

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Technology Deep Dive: Building a Faster ORAM Layer for Enclaves

Private doesn’t mean lonely. Signal’s mission is to help you connect with people in a secure way. This means that you need to know which of your contacts are also on Signal. This is called “contact...

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A Message from Signal's New President

On September 12 I’ll be stepping into the role of Signal’s President, a new position created in collaboration with Signal’s leadership. I am thrilled, and I can’t think of a more meaningful use of my...

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Help people in Iran reconnect to Signal – a request to our community

Signal is currently blocked in Iran. To help people in the country access Signal, we are republishing and revising a post that we originally posted in February, 2021 during a very similar situation in...

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Removing SMS support from Signal Android (soon)

For many years, the Signal app on Android has supported sending and receiving plaintext SMS and MMS messages in addition to Signal messages. SMS and MMS are standardized communication protocols that...

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Story Time

If your favorite way to update your friends about life disappears in 24 hours, we’ve got some happy news for you.Stories are now available on Signal for Android and iOS, with Desktop coming soon!

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Signal is for everyone, and everyone is different

The tech industry–its products, conceptual frameworks, linguistic conventions, and cultural norms–is largely centered in the US (and, increasingly, China. But we’re focused here on the US, where Signal...

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Standing firm against threats to private and safe communication

Signal exists to provide people everywhere with a tool for real private communication. That’s our only goal, and we take it very seriously. We’re structured as a nonprofit to ensure that market forces...

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Quantum Resistance and the Signal Protocol

The Signal Protocol is a set of cryptographic specifications that provides end-to-end encryption for private communications exchanged daily by billions of people around the world. After its publication...

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