5 best TikTok marketing agencies in 2025

In late 2021, TikTok surpassed 1 billion monthly users, making it one of the internet’s favorite applications. Gen Z popularized TikTok, but the app has become a multi-generational channel where even senior influencers have entered the space.

And with consumer preferences leaning towards short-form video, the demand for agencies who specialize in TikTok marketing remains high. In this article, we’ll walk through case studies from top certified TikTok marketing agencies to show how they use TikTok to grow their clients’ brands, building a business case for more agencies to expand their services.

5 top TikTok marketing agencies (with case studies)

Before we get started, here is a tip: learn from the agencies who’ve already branched into TikTok by looking at TikTok’s official marketing partners directory. The directory features a range of marketing agencies and other companies that provide a variety services, including popular ones like creative, commerce, sound and campaign management services.

To narrow down your research, we’ve created a list of some of the best TikTok marketing agencies and share how they’ve approached building successful campaigns with clients:

1. Byte/Dept

Who they are: Byte/Dept is a marketing technology agency based in London, New York and Berlin. Byte was acquired by Dept in February 2021.

They provide a variety of services for analytics, technology, creative and media services. Some examples of Byte’s services include chatbot creation and augmented reality. They are an official Snapchat Lense Partner as well.

Case study: ASO

Byte/Dept worked with ASOS to create the British online fashion retailer’s first TikTok campaign. The branded hashtag challenge #AySauce encouraged users to show off their outfits in the United States and the United Kingdom.

The three-week campaign featured a branded TikTok sound, in-feed ads, an interactive augmented reality experience and a diverse trough of talent including Holly H, the Neffati Brothers, Michael Le, Jordan Fisher and Luke Trotman from Love Island to name a few.

3 sauce looks…which is your fave? A, B or C? 🔥🔥 @asos #AySauceChallenge #ASOS #Ad

♬ Ay Sauce ' Cashino