Overview
Sphere, based in San Francisco, United States, has raised $21M in a Series A round on Nov 18, 2025, with participation from a16z. The company the Only AI-Native Tax Engine. The round will be used to accelerate product development, expand the team, and scale go-to-market operations.
Operating in the software development sector, Sphere is positioned to capitalize on growing demand for innovative solutions in this space. The company was founded in 2021 by Nicholas Rudder. Nicholas brings deep domain expertise and a track record of execution that attracted investor confidence in this round. With fresh capital, the company is expected to invest heavily in R&D and talent acquisition, signaling a period of aggressive growth ahead.
Market Outlook
This funding positions Sphere as one to watch in the software development landscape. As the company scales, it will likely become an increasingly attractive partner — and customer — for B2B vendors looking to sell into well-funded, growth-stage companies. The post-raise window of 60-90 days is typically when startups are most receptive to new tools, services, and partnerships.
Why contact Sphere now
Sphere just closed $21M in Series A funding — which means they're actively scaling their team, upgrading their tech stack, and looking for vendors who can help them move fast. Companies at this stage typically make purchasing decisions within 60-90 days of closing a round. If you sell to software development companies, this is your window to reach out before competitors do.
Founders & Contacts
Investors
Company Facts
| Company | Sphere |
| Amount Raised | $21M |
| Funding Round | Series A |
| Date Raised | Nov 18, 2025 |
| Founded | 2021 |
| Industry | Software Development |
| Founders | Nicholas Rudder |
| HQ Location | San Francisco, United States |
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