Spark Capital

Our biggest round yet: K2 Space Corporation has raised a $500M Series D at a $6.8B post-money valuation. The round was led by Kleiner Perkins and ICONIQ, with participation from CapitalG, Lightspeed, Altimeter, Spark Capital, Sands Capital, ARK Investment Management LLC, T. Rowe Price, and other existing investors.   "Scaling” is probably the word I’ve used most often the past few months in conversations with our investors, customers, and employees when talking about what’s next for K2 Space in 2027 and beyond:  --We’re going to continue to scale up mass production, to deliver against the $1B+ in contracts we’ve won to-date. --We’re going to scale up the satellite itself, from the 20kW Mega to the 100kW class Giga. Its no longer just 100kW, but we’ll save that update for another day.   The capital from the Series D will turbocharge this scaling.     Thanks to everyone who has been on this journey with us for the last four years – let's keep building bigger. 

Transformative news from Chainguard and a coalition uniting the leaders of the U.S. financial system, critical infrastructure, and enterprise — with many more coming. There is no guarantee of a panacea, but what we can guarantee is that no one on earth has spent more time thinking, predicting, preparing, and solving for this day than Dan Lorenc and Matt Moore, and we are very lucky to have them on the front lines of one of the most critical challenges in the age of AI.

Transformative news from Chainguard and a coalition uniting the leaders of the U.S. financial system, critical infrastructure, and enterprise — with many more coming. There is no guarantee of a panacea, but what we can guarantee is that no one on earth has spent more time thinking, predicting, preparing, and solving for this day than Dan Lorenc and Matt Moore, and we are very lucky to have them on the front lines of one of the most critical challenges in the age of AI.

Today we're launching Index: a platform that helps content owners understand how AI agents use their work and participate in the economics of that use. AI agents are the web's second user. They'll use it 1000x more than humans ever have and create enormous value as a result. But the economic model of the web, built for human users, doesn't work when the user is an agent. Index is a new, incentive-aligned model for the agentic web. It gives content owners two things: Analytics on how agents discover, cite, and rely on their content. And compensation tied to that use, calculated using each source's Shapley value — its contribution to the work an agent performs at the moment of inference. Content that is uniquely valuable, hard to replace, or used on high-value agent work earns more. Launch partners span premium publishers The Atlantic, Fortune, PR Newswire, business intelligence and data providers PitchBook, ZoomInfo, Tracxn, RocketReach, Enigma Technologies, Inc., Fiscal AI, and leading independent creators Sources, Exponential View, The Generalist, Every Inc., and Not Boring. Enter your domain at index.parallel.ai to see how agents are using your content. Join the Index.

The web’s second user is coming online. Our customers are building at the frontier - shaping every corner of the economy. To build the infrastructure they need, we've raised a $100M Series B led by Sequoia Capital, valuing Parallel Web Systems at $2.0B. Every existing investor doubled down: Index Ventures, Kleiner Perkins, Spark Capital, Khosla Ventures, First Round Capital, Terrain, and Abstract.

Thrilled to announce Spark Capital is leading Mastra's $22M Series A. We couldn't be more excited to support Sam Bhagwat, Abhi Aiyer, Shane Thomas, and their team in building the default framework for TypeScript agents. 🚀 As models get better, the infrastructure around them matters more, not less. The interesting work is moving up the stack into the orchestration layer — how teams manage context, memory, tool calls, evals, observability. And production teams don't want to lock themselves into a single model provider. Mastra is the open-source TypeScript framework that gives teams full control of this layer. It's model-agnostic, batteries-included, and already in production at companies like Brex, MongoDB, Workday, Salesforce, and Replit. Last year TypeScript overtook Python as the #1 language on GitHub. Agents are becoming features inside normal web applications, and normal web applications run on TypeScript. Sam, Abhi, and Shane carry deep OSS instincts and hard-won learnings from building Gatsby, and you can feel it in the docs, the community, and how they earn developer trust at Mastra. In a market where the ground shifts every few weeks, you must ship constantly. Last week the team launched the Mastra Platform — Studio, Server, and Memory Gateway — alongside their fundraise. Congrats to the entire Mastra team and welcome to the Spark family!