Rainforest, a startup that embeds payment processing into other software platforms, has raised $29 million in a Series B funding round, the company told Crunchbase News exclusively. Matrix Partners and Infinity Ventures co-led the financing for the Atlanta-based company, which also included participation from Accel and Tech Square Ventures. All are repeat backers. In total, Rainforest has raised $57.5 million since its 2022 inception. Rainforest, which is a self-described challenger to fintech g...