 Wiz was founded in 2020. It had been eyeing an IPO as recently as May when it achieved a valuation of $12 billion. The cost of a first-class stamp is now 73 cents. The Postal Service raised it by 5 cents yesterday. It's the second increase this year. Stamps aren't the only thing that went up. The cost for bulk mail, postcards, and packages went up, too. The price hikes are part of a 10-year plan intended to financially stabilize the Postal Service. The amount of mail handled by the Post Office has dropped significantly.