Danielle Morrill is a startup founder and operator who co-founded Groupthink and Ineffable VC, and previously founded Mattermark, a company-data platform for tracking fast-growing companies that was acquired after participating in Y Combinator's Summer 2012 batch. Danielle Morrill's Twitter Score is 147 out of 1000 (an Excellent rating) as of July 2026, ranking #4,253 (top 1%) among 531,432 tracked accounts.
Danielle Morrill currently serves as cofounder and CEO of Groupthink, which describes itself as a note-taking and relationship-intelligence product that organizes notes, deliverables, meeting context, and professional relationship records, and is operated under the legal entity Firstparty Labs, Inc. She also co-founded Ineffable VC, where she serves as cofounder and CEO. Earlier in her career, she previously worked at Twilio, GitLab, and Meltano.
Danielle Morrill has published 4,898 posts on the platform and has 212,734 followers as of July 2026. She has been mentioned by 429 accounts, with 1,373 total mentions.
Who follows Danielle Morrill on X?
The accounts that follow Danielle Morrill include 789 founders, 189 angel investors, 131 influencers and 98 VCs, among them Balaji, Chris Dixon, Marc Andreessen, jesse.base.eth, Sam Altman and Erik Voorhees.