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Signal is a cross-platform encrypted messaging service. It uses the Internet to send one-to-one and group messages, which can include files, voice notes, images and videos. It can also be used to make one-to-one and group voice and video calls.
Full Outage Map
MultimediaProblems in the last 24 hours
The graph below depicts the number of Signal reports received over the last 24 hours by time of day. When the number of reports exceeds the baseline, represented by the red line, an outage is determined.
At the moment, we haven't detected any problems at Signal. Are you experiencing issues or an outage? Leave a message in the comments section!
Most Reported Problems
The following are the most recent problems reported by Signal users through our website.
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Messaging (59%)
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Connection (28%)
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App Crashing (7%)
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Sign in (2%)
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Multimedia (2%)
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Glitches (2%)
Live Outage Map
The most recent Signal outage reports came from the following cities:
| City | Problem Type | Report Time |
|---|---|---|
 Jewar |
App Crashing | |
| Noida |
Glitches | |
 Sterling |
Video | |
 Quito |
Glitches | |
| Canelos |
Sign in | |
 Lyon |
Messaging |
Full Outage Map
Community Discussion
Tips? Frustrations? Share them here. Useful comments include a description of the problem, city and postal code.
Beware of "support numbers" or "recovery" accounts that might be posted below. Make sure to report and downvote those comments. Avoid posting your personal information.
Signal Issues Reports
Latest outage, problems and issue reports in social media:
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deetothab
(@deetothab) reported
@ammaradurrani @mer__edith @signalapp Isn’t business insider a paid “news” service
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NAlaveras
(@NAlaveras) reported
Is the @signalapp network down?
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Raving Sombra
(@RavingSombra) reported
@sudobunni @signalapp Realistically? It's impossible unless a lot of other people also start using Signal. Best chance is to tell them to install it as a backup for whenever whatsapp has an outage
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ZOGE
(@thezoge) reported
If you bought @zcash but are not using @signalapp or @ThreemaApp something is broken in your reasoning.
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iambighead
(@iambighead168) reported
is it just me or Signal is down in Singapore. My whole family can't send msg using the Signal mobile or desktop app. Internet is okay (like X here) for web surfing. @signalapp
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SighGuy
(@CryptoSiGuy) reported
@m4rio_eth @signalapp down for me in Asia
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Sooraj Sathyanarayanan
(@iAnonymous3000) reported
.@signalapp just rolled out quantum-resistant messaging to billions of people. This is a big deal. Let me walk you through what's happening and why I think this matters. For non-cryptography folks: the simple version: You know how we worry about hackers? Well, future quantum computers will be like super-hackers that can break most of today's encryption. Governments are already recording encrypted messages now, planning to decrypt them later when quantum computers exist. Signal just made your messages immune to this - and you didn't have to do anything. No app update to install, no settings to change. It just... works. That's it. If you don't care about the technical details, you can stop reading here. For everyone else: what's actually happening Signal added a new layer called SPQR (Sparse Post-Quantum Ratchet) to their existing Double Ratchet. Instead of replacing the current protocol, they're running both in parallel and mixing the keys together - hence "Triple Ratchet." The clever bit: an attacker now has to break BOTH elliptic curve crypto AND ML-KEM to read your messages. You get quantum resistance without giving up any of your current security. The engineering problem they solved Here's where it gets interesting. ML-KEM keys are massive - 1184 bytes versus 32 bytes for ECDH. That's a 37x increase. On mobile networks where every byte costs money, this could've been a disaster. Their solution involves three things: 1. Erasure coding - They split keys into chunks and spread them across multiple messages. You only need any N chunks to reconstruct the key, not specific ones. This means an attacker can't just drop the "key message" - they'd have to drop ALL messages, causing obvious DoS. 2. ML-KEM Braid - They dug into the ML-KEM internals and realized they could send parts of it in parallel instead of sequentially. Turns out you can extract a 32-byte seed early and generate most of the ciphertext from that, allowing both sides to transmit simultaneously. Gets them to ~95% bandwidth utilization. 3. Slower is sometimes better - This one surprised me. They simulated a dozen different state machines and found that generating keys too aggressively actually makes things LESS secure during device compromise. If you're generating keys faster than your partner is confirming them, you're storing more decryption keys locally, giving an attacker more epochs to crack. They deliberately throttled it. What I think about all this I'm genuinely impressed. Here's why: The gap between "we proved this in a paper" and "we deployed this to 2 billion people" is enormous. Most cryptographers never cross it. Signal did. They didn't just bolt PQ crypto on top and call it a day. They actually optimized it, simulated it, found the edge cases, and made hard tradeoffs. The "slower is better" insight? That's the kind of thing you only learn by actually building and testing, not just theorizing. The formal verification setup is how this SHOULD be done but almost never is. They used ProVerif during design (not after), and they're running hax/F* verification on every commit. Their codebase is provably panic-free. When's the last time you saw that in production crypto code? The backward compatibility story is clean. SPQR data gets attached to messages but not mixed into keys initially. If the other side doesn't understand it, they ignore it and everything still works. After the first round-trip, SPQR locks in and can't be downgraded. Simple, elegant, secure. Why this actually matters Look, most "quantum-safe" announcements are vaporware. Companies slap "PQ-ready" on their marketing and call it a day. Signal shipped actual code that's protecting actual messages right now. WhatsApp, iMessage, and everyone else using Signal Protocol variants now have to catch up. The competitive pressure is real. And here's the thing that keeps me up at night: how many of your messages from the last 5 years are sitting in some government database waiting for quantum computers? If you were using Signal, you're good going forward. Anything else? Good luck. The academic foundation This came out of two papers - one at Eurocrypt '25 introducing the Triple Ratchet concept and proving it secure, another at USENIX '25 analyzing six different protocol designs to find the optimal one. Collaboration with PQShield, AIST, and NYU. This is how it should work: academia and industry actually talking to each other, not just publishing papers that never get implemented. What happens now For users: absolutely nothing. You're already protected and you didn't have to think about it. For other messaging apps: you're officially behind. Clock's ticking. For protocol designers: study this implementation. The combination of erasure coding + ML-KEM optimization + hybrid construction is a template worth copying. For the crypto community: this raises the bar. We can't keep publishing "quantum-safe" proposals that ignore real-world constraints like bandwidth, battery, and backward compatibility.
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iambighead
(@iambighead168) reported
@POLITROSO @signalapp Good to know I am not alone (or at least the issue is not localized at my place).
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Chakrit M.
(@herculesdoctor) reported
Is @signalapp down? None of my messages are going through
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آبان
(@badesardepaeez) reported
@signalapp Signal's biggest flaw is its need for the old tradition of a phone number for verification. Its structure is also a copy of WhatsApp. Could it be a solution to the problem of Signal's SMS blocking in Iran?
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Marc
(@phi50531860) reported
@jack @signalapp $ZEC #Zcash problem solved. Bitcoin is the absolute opposite of private!
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hohhle
(@hohhle) reported
@vikrantnyc @sethforprivacy @signalapp Building a custodial ln wallet is not worth the legal risk. User ln errors blamed on 🍰 with a non-custodial ln wallet is not worth the reputational risk for 🍰.
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dabadu
(@msb2k) reported
@gzabania @iambighead168 @signalapp For me it's not only the desktop app but also the iOS app having network issues.
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( ͡° ͜ʖ ͡°)
(@flyingidly) reported
is @signalapp down? #SignalApp
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drickzy🛡️🐈⬛
(@drickzy10) reported
@sondotpin @signalapp @Zcash Freedom all the way down. Nothing stopping us right now.
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Paper Baggins
(@urlocaldd) reported
@7BitShift @jack @signalapp bitcoin went down does not exist
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kathy@lovemycountry
(@kathy40459692) reported
@robhoodknight @EricLDaugh @signalapp how about that Miley publicly admitting he would tell the chinese if the US were to attack China? How about that Austin not telling anyone he was in the hospital, and he employed all that trans/woke/DEI **** in the military? Talk about a bunch of screw ups. go sit down
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Chandrapal Badshah
(@bnchandrapal) reported
Is @signalapp down?
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지분전쟁 ⚡️불꽃남자
(@Flame_of_Man) reported
@jack @signalapp Please help on this.
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ttafs
(@whentheferg) reported
@signalapp Is there an outage? Phone/Desktop can no longer connect, no matter the network.
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Kristof Bernaert
(@vanbernaert) reported
@m4rio_eth @signalapp I guess an internet outage somewhere, there are more services down.
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7Bit Shift
(@7BitShift) reported
@jack @signalapp Just one problem with bitcoin, it’s not stable, value changes too quick
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Nyet
(@hugyourstop) reported
@signalapp are you down? Messages not going through
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Rohitav Sharma
(@RohitavSharma) reported
Is @signalapp on desktop down?
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Jolly
(@TheTweetOfJolly) reported
@signalapp service is down in india
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Tech-Bore
(@techbore) reported
@privacy_guides @signalapp @WhatsApp And there lies the problem...when Signal does it, it's perfectly acceptable, but bad for everyone else.
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Bearded Old Codger
(@BeardedBob7282) reported
@Altismus @signalapp You mean, "What's the problem if you've nothing to hide?" Only a few of generations ago, Germany and the USSR, amongst others, provided PERFECT examples of why Guv'ment having too much data about your innocent activities is a bad thing.
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Rmj
(@rmjsht) reported
@signalapp Help us out and start publishing to f-droid
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investingdams.ip 🏝️
(@InvestingDams) reported
@jack @signalapp Jack i do my job and buy 4000$ more on bitcoin, need your help !
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7Bit Shift
(@7BitShift) reported
@urlocaldd @jack @signalapp That I get but say I am selling something, I got paid with bitcoin at current rate and when I decided to make payment to my distributor, bitcoin went down, now I am at loss right? It can work only if we don’t convert to dollars and commodities are priced in terms of bitcoin itself