From their own website:
Our mission is to enrich consumer experiences online by enabling access to content anytime, anywhere. To this end, RhythmOne connects audiences with premium content and advertising across the web. We work with advertisers, publishers and content providers to provide value through:

*Fully integrated advertising solutions, spanning desktop and mobile video, rich media, display, social and native formats.
*Cross-screen targeting - following audiences as they migrate across devices.
*Massive reach, delivered through our owned and operated channels, and quality distributed partners.
*Video content distribution that enhances web experiences for publishers and consumers.
The aim of RhythmOne is to streamline the campaign planning experience, making it a more consolidated and efficient process. By understanding the target audience, the advertising goal, and the spend amount, we can collaborate with brands to optimize the campaign and maximize ROI by using the appropriate formats across the appropriate screens.

https://www.rhythmone.com/

As of 14 April, 2015, Burst Media LLC was acquired by RhythmOne, LLC. Burst Media LLC offers online video advertising solutions to web publishers. The company offers multi-platform solutions in the areas of rich media, online video, social media, mobile, and sponsorships that connect brands with targeted and influential audiences through specialized content on various Websites and influencer blogs. It also markets AdConductor, an advertisement management platform to advertisement-supported businesses, such as advertisement networks, technology providers, portals, and individual Web sites. In addition, the company publishes Online Insights, a research series that highlights emerging trends in online media and ecommerce based on online surveys fielded across a collection of the company’s sites. Its solutions allow brands to leverage creative formats, social media, and content distribution channels to engage consumers across connected devices.
Subsidiaries include : ANYSTREAM, ADKARMA, LYFE MOBILE, ALL MEDIA NETWORK, PRIME VISIBILTY NETWORK Grp.

StockMarketWire.com
Advertising technology company RhythmOne said it had formed an early collaborative partnership with Pixalate.

The coupling would involve RhythmOne integrating Pixalate's traffic-detection and filtration technology into its platform offering.

The Pixalate solution would work in conjunction with RhythmOne's own brand safety technology.

StockMarketWire.com
Advertising technology company RhythmOne said it had formed a partnership with location-driven insights group Place.

RhythmOne would offer Placed's clients with a new measurement solution that quantified the impact of digital and linear TV campaigns in driving consumers to retail stores.

It would integrate Placed's TV measurement solution, which leveraged in-store attribution data to match linear TV ad exposure with desktop, mobile, and connected TV ad exposures.