Sources and Method
Mainstay Filing is our best overall pick. Every price comes from a provider’s own registered agent page and carries the date it was read.
Prices
Providers per state are those whose own site ranked in Google’s top 20 for “cheapest registered agent” plus that state on October 20, 2026, or that Google’s AI overview named, plus Northwest, ZenBusiness, Bizee and LegalZoom everywhere. A provider that publishes no price is left out. Prices were read on October 20, 2026; Mainstay Filing from its registered agent page and checkout.Ranking
Year-1 ranking sorts by the first-year price; renewal ranking by the renewal price; ties break on the other price. Promo and prepay prices are shown as published and flagged on their pages.State rules
Agent requirements, addresses and change fees come from statutes and Secretary of State forms, checked October 2026; citations are on each state page.