We'll tell you when anything you want happens, news moves your stocks, the price drops, a new paper is out, applications open, tickets go on sale, the deal closes.
Stop checking every day. Tell us what to watch in plain words, and we'll message you the moment it happens.
Free for now. Works in Slack, Discord, Telegram and email.
Fastest of 8 alerts in a live raceSee the leaderboardTell it once. It tells you when.
Say what to watch in Slack, Discord, Telegram or email. Change it by replying, and hear when it happens.
Most AI waits for you to ask
A chatbot answers when you think to ask, and by then the news is old and the price has moved. Tellwhen works the other way round.
Tell it once what matters, and it speaks first.
5 hours after Alphabet's results
Alphabet reported Q3 2026 revenue of $127.6 billion, up 25% from $102.3 billion a year ago.
6 minutes after Alphabet's results
The same news, but the email came while the market was still reacting.
One message sets it up
Say what you want to hear about, by email or in a chat. You get a reply listing your alerts, then a message when one happens.
Please alert me about: 1. Tech acquisitions Worth an email only when: deals over $1 billion How fast: the moment it happens 2. Startup funding Worth an email only when: rounds over $100M How fast: the moment it happens 3. Big tech layoffs Worth an email only when: a major round of cuts How fast: same day Never send me: rumors, opinion pieces
The setup, shown as it works today, then a real alert.
Done. You're now following 3 things.
Your alerts
1. Tech acquisitions over $1BA tech company announces or completes an acquisition valued at more than $1 billion.Watching news feeds every minute or two and Google News every 5 minutes; sent as soon as it's found.
2. Big startup funding over $100MA major startup announces a funding round of over $100M (exactly $100M doesn't count).Watching news feeds every minute or two and Google News every 5 minutes; sent as soon as it's found.
3. Big tech company layoffsA major tech company announces a significant round of layoffs.Watching news feeds every minute or two and Google News every 5 minutes; sent as soon as it's found.
The setup, shown as it works today, then a real alert.
Marvell Technology has announced a deal to acquire optical components maker Lumentum in an all-stock transaction valued at $115 billion. The combination is aimed at creating a leading position in AI data-center connectivity, where Lumentum's laser and optical module technology plugs into Marvell's silicon and networking portfolio. Lumentum's sales more than doubled over the past year, reflecting surging demand for high-speed optical links inside AI clusters.
First reported today, 7:05 am ET.
Source
Marvell to buy Lumentum in $115 billion deal in AI data-center bet reuters.com
This is your “Tech acquisitions over $1B” alert. Reply “stop” to pause it, or tell me what to skip, like “no rumors”.
A real alert: Marvell announced 6:56 AM · Business Wire 7:05 AM · Tellwhen 7:17 AM
Watch for anything
If you can say it in a sentence, you can get an email when it happens.
Know what moves your stocks
Name the companies you hold and what would change your mind, like a deal falling through, a lost customer or new guidance. We email you when it happens.
Meta reported Q3 2026 revenue of $64.6 billion, up 26% year-over-year, with diluted EPS of $3.83 (up 265%).
Never miss a paper in your field
Describe the problem you work on in your own words. New papers and conference news are checked against what you said matters.
A new arXiv paper posted October 19 shows that agent decision models systematically trust their own action logs over environmental observations when the two conflict.
Follow funding rounds above your bar
Set the bar in your own words, like over $100M. Smaller rounds, rumors and old news are left out.
DeepSeek, the Hangzhou-based AI startup, has raised about 100 billion yuan ($15 billion) in its latest funding round, one of the largest in Chinese history.
Hear about openings at the companies you want
Name the companies and the kind of role. When a new one is posted, you'll know.
Amazon – Software Development Engineer 1, AI/ML Network Infrastructure (Cupertino, CA) NVIDIA – Software Engineer New Grad, Agent Performance Modeling (Santa Clara, CA)
Know when big companies cut jobs
Name the companies, or a group like big tech. When one announces layoffs, you'll know.
eBay announced it will lay off approximately 9% of its workforce, according to an internal memo reported by Reuters today.
Anything you can put in a sentence
Say what you'd hate to miss, in your own words, and we'll keep watch.
We read over a hundred newsrooms, regulators and research feeds, and search the web for each alert.
Reply anytime, in plain words
Two replies from the creator's inbox, as Tellwhen handles them today. It answered each in about a minute.
Swap one out · Oct 13
You2:16 AMdrop 3 and add new Nvidia chip announcements
Tellwhen2:17 AMRemoved the FDA obesity drug alert. Added a new alert for Nvidia chip announcements.
Your alerts:
…
3. New Nvidia chip announcementsNvidia announces a new GPU, processor, or chip product.
Change an alert · Oct 16
You1:33 PMchange this alert to all top startups, not just AI startups
Tellwhen1:33 PMDone: changed 1.
Your alerts:
1. Big startup funding over $100MA major startup announces a funding round of over $100M (exactly $100M doesn't count).Watching news feeds every minute or two and Google News every 10 minutes; emailed the same day.
…
Also on Slack, Discord and Telegram
Start in a chat or by email, then connect them into one account.
SlackAdd to SlackAdd Tellwhen to your workspace once, and anyone there can message it in a private chat. Alerts arrive in that chat.
Slack will show “App not approved by Slack” because Tellwhen isn't in its directory yet.
DiscordJoin DiscordJoin the Tellwhen server, click the Tellwhen bot in the member list and message it. That opens a private chat. Alerts and replies stay there, and nothing is posted in the server.
TelegramOpen TelegramOpen Tellwhen on Telegram and tap Start. Say what you want in your own words, like “tell me when Nvidia announces a new chip”. Alerts arrive in that chat.
Connect your accounts
From email, Slack, Discord or Telegram, say “connect slack”, “connect discord”, “connect telegram” or “connect email”, then follow the steps in the reply. Your alerts then reach every connected place, you can see, change or remove them from any of them, and answers stay where you asked.
- The code in the reply works once, for one hour. Keep it private: whoever uses it can manage your alerts.
- If both sides already had alerts, they're combined and nothing is lost. Combining can't be undone.
- To unlink a place, say “disconnect” in a chat, or “disconnect telegram” or “disconnect discord”. Combined alerts aren't split.
- In any chat, say “stop” to pause an alert, or “stop all” to turn everything off.
Hi, I'm Zanwen
I buy stocks, but I don't have time to follow the news every day.
Last year I spotted a company early, then missed its IPO. This year bad news hit it. I missed that too, and didn't sell in time.
So I built Tellwhen. Tell it what matters to you, and you won't miss it again.
Before this: VYNN AI, Robinhood, AutoCodeRover (acquired by Sonar) and Binance.