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 183 out of 1000 (an Excellent rating) as of September 2026, ranking #2,677 (top 1%) among 486,860 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 5,541 posts on the platform and has 283,352 followers as of September 2026. She has been mentioned by 430 accounts, with 1,374 total mentions.
Who follows Danielle Morrill on X?
The accounts that follow Danielle Morrill include 918 founders, 282 angel investors, 100 influencers and 113 VCs, among them Balaji, Chris Dixon, Erik Voorhees, Marc Andreessen, jesse.base.eth and Sam Altman.