Sam Bhagwat

building @mastra. author principles of building ai agents, the "most popular book in SF right now". prev cofounder @gatsbyjs

[Sam Bhagwat @calcsam]

We’re excited to announce today that @mastra has raised a $22M Series A led by Spark Capital.

This brings our total capital raised to $35M:

[Sam Bhagwat @calcsam]

mastra has entered the signals era

[Tyler Barnes @tylbar]

🚨We shipped a new context engineering primitive @mastra today, Agent Signals! (alpha)
🔓Unlocks: multiplayer steering, dynamic cacheable system prompts, agent notifications (gh/email/etc), and automatic behavior guidance 🧵

[Sam Bhagwat @calcsam]

@mattrickard i have a history with this term https://t.co/GFClfv9ffZ

[Sam Bhagwat @calcsam]

welcome to the agent mesh

[Paul Klein IV @pk_iv]

every agent platform needs to offer:

1. sandbox
2. model router
3. observability
4. ???

what am i missing?

[Sam Bhagwat @calcsam]

@Infoxicador 🤣

[Sam Bhagwat @calcsam]

keynote driven development

[Sam Bhagwat @calcsam]

@smthomas3 yes!!

[Tyler Barnes @tylbar]

🚨We shipped a new context engineering primitive @mastra today, Agent Signals! (alpha)
🔓Unlocks: multiplayer steering, dynamic cacheable system prompts, agent notifications (gh/email/etc), and automatic behavior guidance 🧵

[Sam Bhagwat @calcsam]

@davecyen v interesting

[Sam Bhagwat @calcsam]

@Kyriakos_Pelek hire the right team

[Sam Bhagwat @calcsam]

The real agentic engineering hack is to user-feedback-maxx

Through channels that persist: shared Slacks, Discord, Fireflies.

Then turn your agents loose and instantly ship fixes

[Peter Yang @petergyang]

Matt's guide is great but this line is pretty funny:

"They're so lit up by being able to build anything that they don't do anything else. Then they launch and there are no users." 😆

[Sam Bhagwat @calcsam]

@matiasdev_ @mastra 🚀🚀🚀

[Sam Bhagwat @calcsam]

build your in app agent with mastra

and you too can raise 150m at a 2.5b

[Seb Johnson @SebJohnsonUK]

BREAKING: Spanish @factorialapp has JUST raised a WHOPPING $150m Series D at $2.5bn valuation! 🇪🇸

The round was led by @generalcatalyst (@pranavsinghvi), who have also committed an additional $540m through its Customer Value Fund.

This is AMAZING news for one of the top companies coming out of Spain.

I spoke to Founder and CEO Jordi and discussed:

0:00 - Introduction
0:21 - General Catalyst invests $150m in Factorial
1:10 - Why raise capital now?
2:28 - The relationship with General Catalyst
3:55 - How the Customer Value Fund works
5:24 - From HR software to AI-native workforce operations
9:00 - Leading AI transformation inside a company
11:18 - Why Europe is a great place to build
13:16 - Barcelona’s startup ecosystem
15:52 - Lessons from Silicon Valley
18:21 - Building a company for the long term
19:57 - What Factorial looks for when hiring

Congrats @jordiromero, @bernatfarrero, Pau Ramon Revilla, and the rest of the Factorial team!

[Sam Bhagwat @calcsam]

@MejiasDev yup!

[Sam Bhagwat @calcsam]

@markessien Mark I have bad news for you

Boards have AI psychosis worse than CEOs

[Sam Bhagwat @calcsam]

@SherryYanJiang @JinjingLiang sam also publicly admitting it’s bad at ui is another sign

[Sam Bhagwat @calcsam]

@rahulx004 @mastra @OpenAI Yes please do!!

[Sam Bhagwat @calcsam]

@nbaschez This is an awesome video.

[Sam Bhagwat @calcsam]

@pk_iv integrations

[Sam Bhagwat @calcsam]

@pk_iv web research