The most-represented brand on this list — and it isn't close.

Rove built its name on a single promise: "Honest Oil." Every Rove vape carries a scannable QR code that pulls up independent lab results, so the potency on the box is potency you can verify yourself. Their Melted Diamond Live Resin line — which fills twelve of the twenty slots here — blends live resin with THCA diamonds, pairing 90%+ THC with the full terpene profile of the original strain. You will see two formats: "Ready-To-Use" is a complete all-in-one device, while "Reload" is a 510-thread cartridge that screws onto a battery you already own.

A California original that still tests at the very top.

Kingpen (710 Kingpen) has been making vape cartridges since 2014, which makes it one of the oldest and most awarded names in California cannabis. The brand uses a proprietary distillation process with strain-specific terpene formulations, and its 1g cartridges sit at the head of this leaderboard: Granddaddy Purple (92.64%), Durban Poison (92.14%) and Cali-O (91.03%) are the three highest-testing vapes we carry. Classic strain names, classic potency.

The best-selling cannabis brand in the country.

Founded in Los Angeles in 2017 by Army veteran James Kim, STIIIZY grew from a single pod-and-battery system into the best-selling cannabis brand in the United States. On this list it is represented by the Birthday Cake Liiil — a compact 0.5g all-in-one disposable testing at 90.16% THC. The Liiil is the grab-and-go version of STIIIZY's lineup: no pod to click in, no battery to charge, just a small device that's easy to pocket on your way through LAX.

LA-made vapes built around simplicity.

dompen was founded in Los Angeles in 2015 with a straightforward idea: a vape pen with no buttons and no charging — you open it and it works. The brand designs around the effect you want rather than just the strain name, and it runs domGREEN, a recycling program that takes back used pens. Two dompen products make this list: the Peach Ringz cartridge ($25) and the Mango Haze All-In-One ($40), both above 90% THC — and that $25 cart is tied for the lowest price in the entire Top 20.

The newcomer punching well above its price.

CIZI is the youngest brand on this leaderboard — a California company that launched in 2023 in Orange County and expanded statewide within a year. Its pitch is potent, clean, consistent oil without a premium price tag. The Cizi AIO in Pineapple Upside Down Cake proves the point: a full 1-gram all-in-one disposable testing at 91.77% THC for $32 — one of the strongest-per-dollar vapes on this entire list.