Sequence announces $20 million Series A led by 645 Ventures

Sequence announced its Series A on December 16, 2025, led by 645 Ventures. The company reported a $20 million round with participation from a16z, Firstminute Capital, Vor Capital, Passion Capital and Dig Ventures, as well as founders and finance executives. Sequence develops tools for quoting, billing, invoicing, accounts receivable and revenue recognition, including artificial intelligence agents for contract intake, invoice review and collections. It said the funding brought cumulative capital raised to $38 million. The company plans to expand revenue automation while retaining human oversight and deterministic billing calculations. The announcement identifies the lead investor and the round total, but does not disclose 645 Ventures’ individual contribution or ownership stake.