Semrush Acquires Third Door Media (Search Engine Land, SMX, MarTech)

Moving Traffic Media Acquires SpiderBoost

October 27, 2025

Marketing & Advertising

Moving Traffic Media has acquired SpiderBoost, a Miami-based digital agency, to integrate SpiderBoost’s web development and technical SEO capabilities into MTM’s performance media and enterprise SEO offerings. The acquisition is intended to expand MTM’s ability to deliver end-to-end, AI-ready search and web experiences for clients across healthcare, ecommerce, and nonprofit sectors.

Semrush Acquires Backlinko

January 19, 2022

Cloud & SaaS

Semrush, the Boston-headquartered online visibility management SaaS platform, has acquired SEO training site Backlinko to bolster its digital marketing education offerings. Backlinko, founded by Brian Dean and drawing over 500,000 monthly non-paid visits, will join Semrush Academy with Dean and his team continuing to produce content.

Six Red Marbles Acquires Triple SSS Press Media Development, Inc.

September 1, 2020

Education

Six Red Marbles (SRM) has acquired Triple SSS Press Media Development, Inc., a provider of higher-education content and courseware development. Founder Susan Simpfenderfer will join SRM as Executive Director of Higher Education Content to expand SRM's higher-education content development capabilities and client offerings.

Stage Acquires ThirdChannel

December 9, 2020

Cloud & SaaS

Stage, a Denver-based growth venture fund, has acquired ThirdChannel, a Boston-based SaaS provider of retail execution and in-store customer experience management. The acquisition brings ThirdChannel's field agent network, field management system, and analytics platform into Stage's portfolio to accelerate growth and expand Stage's capabilities in retail-focused SaaS and tech-enabled services.

SmartBug Media Acquires Chair 10 Marketing

May 17, 2023

Marketing & Advertising

SmartBug Media has acquired Chair 10 Marketing, a Seattle-based performance marketing agency and Google Premier Partner, to deepen its paid media, paid social and local SEO capabilities. The acquisition expands SmartBug's B2C and multi-location franchise expertise and integrates Chair 10's recurring paid-media services into SmartBug's broader inbound, e-commerce and revenue operations offerings.

Semrush Acquires Kompyte

February 28, 2022

Cloud & SaaS

Semrush, the Boston-based online visibility management SaaS provider, has acquired Kompyte, an Austin-headquartered AI-driven competitive intelligence and sales enablement platform. The deal expands Semrush's competitive intelligence and sales enablement capabilities and creates upsell opportunities to Semrush's existing customer base.