a16z leads $21M Series A into AI-native tax compliance software Sphere |

As Nicholas Rudder built his last startup, aneducational marketplacecalledScholarSite, he kept running into the same problem: tax. “Marketplaces are liable for tax on their entire…

Backed by $21M, Ciroos Emboldens its Extensible, Multi-Agent SRE AI Companion

Jun 3, 2025 By Sydney Blanchard Ciroos, a pioneer in AI-powered operations, is announcing that it has raised $21 million in its latest funding round…