Slope, a B2B payments platform for enterprise companies, announced a $30 million equity round led by Union Square Ventures, with major participation from OpenAI's Sam Altman, bringing Slope's combined equity and debt funding to $187 million.

Additional participants include monashees, Y Combinator and Y Combinator-backed startups, including Jack Altman from Lattice, Alex Bouaziz from Deel, Mathilde Collin from Front, Michael Tannenbaum from Brex, and Rujul Zaparde from Zip.