David Gu

We've raised our $38M Series B, led by @BessemerVP, with HubSpot Ventures and @SalesforceVC joining. Over 2,000 companies (including @HubSpot, @clickup, @useapolloio) build on @recallai, the API for meeting recording.

@gdb Use recall.ai to bring your agent into any meeting like ClickUp and Monday.com do

aws just silently added 1,500 new ec2 quotas, stay safe out there folks

@zeeg you've got to eat them fresh at the store. Even 5 min in the bag is too much

imagine thinking fries from In-N-Out are good

Thankfully the audio and video are fully encrypted. You may be wondering “doesn’t WebRTC use DTLS for UDP traffic?”. The answer is sort of. DTLS is used to establish the keys for RTP payloads but the RTP is still sent directly over UDP so you end up with the headers in plaintext! Yet they call this SRTP 🤷

RTP headers are sent in plaintext and are rich in metadata. The SSRCs identify who is speaking or sharing their webcam. Header extensions expose more, they often signal the volume of audio or the orientation of video, just to name a couple.

On any network, you can see who is on a video call, their movements or speech patterns by sniffing the RTP headers. Even if your browser shows as “secure”, RTP headers are completely unencrypted over the wire. Here's what's leaking 🧵

We asked a dozen DevTool founders from companies like @RevenueCat, @greptile, @firecrawl, @infisical, @ollama, @resend, @mintlify, @UnslothAI, @porterdotrun, and @recallai, about the state of AI agents and the future of software engineering. In this episode of Founder FAQ, we covered everything from agents as customers and the end of coding, to advice for founders starting out and what they're most excited about going forward. Their answers might surprise you. 00:00 – Meet the Founders 03:00 – Building for Agents First 04:22 – Biggest Early Mistakes 07:15 – Do Founders Still Write Code? 09:22 – Most Unexpected AI Discoveries 12:09 – What's Underrated Right Now 14:38 – Predictions & What's Next

when you run 100M ec2 instances per month you get these notifications very often

EC2 out here tanking your latency with serial ports

If you want read more about how we debugged this in production we wrote about it on our blog recall.ai/blog/debugging… We are growing rapidly and hiring systems engineers in SF!

The really crazy part is that none of this behaviour is documented or trivially observable. We had to piece it together from extensive monitoring, millions of EC2 instances and obscure github threads. #issuecomment-424652979" target="_blank" rel="nofollow noopener">github.com/amzn/amzn-driv…

ec2 could be spiking your api’s p99 and you may not even realise it’s happening

@Vapi_AI amazing! huge congrats on the round!!

We've raised a $50M Series B to keep making everyday calls extraordinary. After 1,000,000,000 calls and 10x enterprise ARR growth, Vapi's platform approach to voice agents is becoming the standard for businesses building human interfaces.

@QuinnyPig it makes an excellent slack emoji

@davidgu That datadog image is incredible.

getting to the scale where running a load test costs real money

best money i've ever spent