Mosaic (@Mosaic_VC) — Twitter Score 21 out of 1000

Mosaic is an early-stage European venture capital firm that backs founding teams at Seed and Series A with investments of $1-10 million. Mosaic's Twitter Score is 21 out of 1000 as of October 2026, ranking #47,811 (top 10%) among 497,973 tracked accounts.

Mosaic was co-founded by Simon Levene, Toby Coppel, and Mike Chalfen as a thesis-driven boutique partnership focused on European founders building ambitious companies. The firm announced its first fund of $140 million and later closed a second fund, Mosaic II, at $150 million in 2018, shifting its primary focus toward Series A investing. Mike Chalfen departed the firm in 2018 to invest independently, though he indicated he would continue serving on Mosaic portfolio-company boards and remain available as an advisor.

Mosaic has made several notable investments in crypto and blockchain. Its first announced investment was a Series A in Blockchain.com, a Bitcoin-wallet provider, co-led with Lightspeed Ventures. The firm also participated in Blockstream's $55 million Series A financing. Mosaic has 1,590 posts on the platform and has been mentioned by 70 accounts a total of 148 times.

Mosaic's portfolio includes MultiChain and Manas.

Who follows Mosaic on X?

The accounts that follow Mosaic include 116 founders, 33 angel investors, 6 influencers and 33 VCs. Among them are Kyle Samani, Adam Back, Matthew Graham, Emilie Choi, Vinny Lingham and VCs Congratulating Themselves.