The top 10 vaping companies can vary based on factors like revenue, market share, and brand recognition. Here’s a list of some prominent vaping companies that have been influential in the industry:

1. Juul Labs: Juul is one of the most recognizable names in vaping, particularly known for its sleek and discreet e-cigarettes. It gained significant market share in the United States and faced scrutiny over its marketing practices, especially regarding youth appeal.
2. British American Tobacco (BAT): BAT is a major player in the tobacco industry and has expanded its presence in the vaping market with brands like Vype and Vuse. It operates globally and offers a range of vaping products.
3. Imperial Brands: Imperial Brands, formerly known as Imperial Tobacco, is another tobacco giant that has diversified into vaping. It owns blu, a well-known vaping brand with a presence in multiple countries.
4. Altria Group (formerly Philip Morris Companies): Altria is one of the largest tobacco companies globally and owns a significant stake in Juul Labs. It also markets its own vaping products under brands like MarkTen and Green Smoke.
5. NJOY: NJOY is an independent vaping company known for its early entry into the market with rechargeable and disposable e-cigarettes. It operates primarily in the United States.
6. SMOK: SMOK is a Chinese manufacturer that has gained popularity for its wide range of vaping devices, including mods, tanks, and starter kits. It has a strong presence in both domestic and international markets.
7. Aspire: Aspire is another prominent Chinese vaping company known for its innovative products and high-quality vaping tanks and atomizers. It caters to both beginner and advanced vapers.
8. Vaporesso: Vaporesso, also based in China, is known for its advanced vaping devices, including mods with advanced features like temperature control and customizable settings. It has a global presence.
9. J Well: J Well is a French vaping company known for its stylish designs and premium vaping products. It has a strong presence in Europe and offers a wide range of e-liquids and devices.
10. Joyetech: Joyetech is one of the earliest vaping companies and is based in China. It offers a diverse range of vaping devices, from beginner-friendly starter kits to advanced mods, catering to vapers of all experience levels.

Please note that the vaping industry is dynamic, and rankings may change over time due to various factors such as market trends, regulatory developments, and company performance.