A startup out of Paris that began life building marketing tools has raised $22 million after making a successful pivot into billing — a space it discovered was even more broken among potential customers. Lago, developer of an open source billing platform, has picked up the funding across two rounds of funding it’s revealing to coincide with its official launch. It’s launching today, but it has been in business in closed beta for some time, during which it’s picked up a number of notable startups...