Sieve — Funding & Company Data
Financial overview and investor data for Sieve.
Founded
2021
Stage
Series a
Total Raised
$11.5M
HQ
San Francisco, CA
Team
11-50
Model
usage-based
Analyst Take
Sieve's funding trajectory is a classic example of a promising startup executing its early-stage playbook effectively. After graduating from the prestigious Y Combinator accelerator in Winter 2022 with $500K in seed funding, the company focused on building its core infrastructure for AI-powered video and audio data processing. The subsequent $11 million Series A round in April 2025, led by reputable firms like Matrix Partners, is a strong validation of their progress and the market's demand for developer-centric AI tools.
This level of funding provides Sieve with a multi-year runway to tackle the computationally expensive challenges of video and audio analysis at scale. It allows them to compete for top engineering talent and invest heavily in R&D to stay ahead in the rapidly evolving AI landscape. The backing by Matrix Partners, a firm with a history of supporting foundational technology companies, suggests a long-term vision rather than a quick flip.
For potential users, this financial backing reduces platform risk. It indicates that Sieve is well-capitalized to support enterprise clients and is unlikely to disappear overnight. The company's focus on serving both frontier AI labs and Fortune 100 companies suggests a robust and scalable architecture, financed to meet demanding uptime and performance requirements. This financial stability is a critical factor for developers considering building their applications on Sieve's infrastructure.
Stability
With a recent $11 million Series A from a top-tier VC, Sieve's financial stability is high for a company at its stage. It is very likely to be a reliable, operational company for the next 2-3 years.
Growth
The company is in a high-growth phase, evidenced by its significant Series A funding in 2025 and a team size that has grown to the 11-50 employee range. This indicates active scaling of operations and product development.
For Buyers
For a developer or company considering Sieve, the recent, substantial funding round significantly de-risks the decision to commit to the platform. It signals longevity and the financial resources to scale and support production workloads.
Funding Timeline
Investors: Matrix Partners, Swift Ventures
Investors: Y Combinator