From Palantir SVP to founder: building Mosaic after 50 rejections

Executive overview

Finance teams at fast-growing startups spend days answering questions the business needs answered in hours. After seven years scaling Palantir's finance function using spreadsheets, Bijan Moallemi left to build Mosaic — software that automates the manual data work so finance can focus on strategy.

Facing 50+ sales rejections and a seed-round no from his master bedroom closet, Moallemi treated each setback as a feedback loop, not a failure. That same investor returned unsolicited to lead the Series A.

Persistence without learning is failure; mistakes you learn from are just part of the journey.

The problem Mosaic solves

• Palantir's finance team ran on Excel — pulling, cleaning, and mapping data before any analysis could start
• A single business question could take two weeks to answer; by then, it was irrelevant
• Most companies lack both the balance sheet and the technical staff that gave Palantir an advantage
• Finance is the last business function still dominated by spreadsheets after 40 years

Building the company

• The name Mosaic comes from the tile metaphor: one data source is limited; all sources together paint a complete picture
• Moallemi and co-founders each served as CFOs at high-growth VC-backed companies after Palantir — validating the problem was universal
• Early sales were hard: neither founder was naturally outgoing; it took 50–60 rejections to develop the pitch
• A seed-round no from a tight investor process, taken from a bedroom closet with seven people in the next room, drove the team to accelerate product and growth
• That investor came back unprompted for the Series A

Customer focus and product discipline

• Champion the customer is Mosaic's first core value
• The right customer changes over time — early SMB feedback guided early builds, but mid-market and upper-mid-market now set the roadmap direction
• Danger: letting one large customer bend the roadmap for everyone else
• Rapid response team — a small group of engineers — handles smaller feature requests without derailing the main roadmap
• Startup focus is defined more by what you choose not to build than what you build

Mindset: the tennis framework

• Moallemi trained in sweatpants in 100-degree Palm Springs heat to prepare for summer tournaments — outworking talent was the strategy
• In tennis, dwelling on a lost point costs the next one; the same applies to startup setbacks
• Founders feel the highs and lows at a much higher amplitude than anyone else on the team
• The core question before starting: are you ready to be persistently resilient for many years?