SIGNALFIRE
SIGNALFIRE is a Pre-seed, Seed, Series A and Series B fund in the US writing $100K–$100M checks into AI, Developer Tools, Enterprise, Healthcare, Marketplaces and Security.
- Stages
- Pre-seed, Seed, Series A, Series B
- Sectors
- AI, Developer Tools, Enterprise, Healthcare, Marketplaces, Security
- Check size
- $100K–$100M
- Invests in
- US-wide
- Actively investing
- Yes
- Founded
- 2013
- Assets under management
- $3B
- Website
- signalfire.com
Thesis
Headquartered in San Francisco, California, SignalFire leverages data and proprietary AI technology, particularly its Beacon AI platform, to identify promising early-stage startups and provide them with comprehensive support. The firm has grown significantly, managing approximately $3 billion in assets under management (AUM) as of early 2026, following a substantial capital raise of over $1 billion in April 2025. SignalFire's core investment thesis is that data and technology, combined with sector expertise and operational support, can create significant advantages for early-stage startups. The firm focuses on investing in companies with technology or business models that are difficult to replicate. SignalFire operates as a tech-enabled venture firm, with a team comprising engineers, data scientists, operators, and investors. This approach allows them to identify exceptional founders early and offer robust support throughout a company's growth trajectory. The firm's strategy involves investing early and building long-term relationships with founders. SignalFire is known for its "all-in" approach, aiming to support companies from pre-seed through Series B stages. They are particularly focused on applied AI companies, with their April 2025 capital raise specifically targeting this sector. SignalFire also invests in sectors including healthcare, cybersecurity, infrastructure, consumer, and other enterprise verticals. As of early 2026, SignalFire has approximately $3 billion in AUM. The firm operates multiple funds, with Fund II closing in 2024 at $80 million, and Funds III-V collectively raising over $1 billion in April 2025. SignalFire's typical check size ranges from $250,000 to $20 million+, with a common seed investment falling between $1 million and $5 million. They have the capacity to invest up
Common questions
Does SIGNALFIRE invest at the Pre-seed stage?
Yes. SIGNALFIRE lists Pre-seed, Seed, Series A and Series B among the stages it invests in.
What check size does SIGNALFIRE write?
SIGNALFIRE writes $100K–$100M checks.
Where does SIGNALFIRE invest?
SIGNALFIRE invests in the US.