State law applies here too. Where both cover a rental, the stricter city rule usually wins; each rule below says so.
Santa Ana lawIn force
Santa Ana ban on algorithmic rent-setting software
Can landlords use software to set my rent?
Not with rivals' private data; that's banned.
Landlords can't share private rent data through an app to set prices.
Who it covers
Exemptions: Pricing software relying solely on publicly available data, aggregate historical data, or tools used to comply with affordable housing program requirements.
Santa Ana Ord. NS-3090 · morganlewis.com · Retrieved Oct 3, 2026
Quote checked word for word
California lawIn force
AB 325 / SB 763 – Common pricing algorithm prohibition (Cartwright Act)
Can landlords use software to set my rent?
Not as part of price-fixing between landlords.
Using a shared pricing tool to collude, or pushing others to use its prices, is illegal.
Who it covers
Covers: Any person using or distributing a common pricing algorithm; not limited to housing; excludes end consumers.
In force since
Jan 1, 2026
Enacted
Oct 6, 2025
The law, word for word
“It shall be unlawful for a person to use or distribute a common pricing algorithm as part of a contract, combination in the form of a trust, or conspiracy to restrain trade or commerce in violation of this chapter …”