SiriusDecisions
SiriusDecisions's Overview
SiriusDecisions was a prominent global research and advisory firm dedicated to empowering B2B sales, marketing, and product leaders with operational intelligence and data-driven insights. Renowned for pioneering practical frameworks such as the Demand Waterfall®, SiriusDecisions provided actionable strategies, benchmarks, and tools to help organizations optimize performance and drive growth. In January 2019, Forrester Research acquired SiriusDecisions, integrating its expertise and offerings into Forrester's comprehensive portfolio serving business and technology leaders.
Where is SiriusDecisions's Headquarters?
HQ Function
Served as the primary center for research development, strategic planning, client advisory services, and global corporate operations for SiriusDecisions prior to its acquisition.
Notable Features:
The headquarters was situated in a modern corporate office park, providing a functional and collaborative workspace. Specific unique architectural highlights were not its primary focus, prioritizing an environment conducive to research and client support.
Work Culture:
SiriusDecisions was known for an intellectually stimulating, data-centric, and collaborative work culture. It attracted experts in B2B disciplines, fostering an environment of continuous learning, innovation, and a strong client-first approach.
HQ Significance:
The Wilton headquarters was pivotal as the birthplace of many influential B2B methodologies and frameworks that became industry standards. It was the nerve center for the company's thought leadership and operational execution globally.
Values Reflected in HQ: The headquarters' design and atmosphere likely reflected SiriusDecisions' core values of research excellence, practical application, professionalism, and collaborative problem-solving.
Location:
Prior to its acquisition by Forrester, SiriusDecisions had established a strong global presence, serving B2B organizations across North America, Europe, and Asia-Pacific. Key global functions included the delivery of subscription-based research and advisory, execution of major industry summits and forums, provision of bespoke consulting services, and offering data and analytics products. Its renowned models and frameworks were utilized by multinational corporations to standardize and improve their sales, marketing, and product operations worldwide.
Street Address:
200 Danbury Road
City:
Wilton
State/Province:
CT
Country:
USA
SiriusDecisions's Global Presence
London, UK
Address: The Leather Market, Unit G.06, Weston Street, London, SE1 3ER, UK (Pre-acquisition address)
EMEA client engagement, localization of research and frameworks, sales operations, and support for SiriusDecisions' growing European client base.
Singapore
Address: 20 Cross Street, #02-08/09 China Square Central, Singapore 048422 (Pre-acquisition address)
APAC market development, client service for regional HQs and local enterprises, and tailoring global B2B strategies to diverse Asian business environments.
Austin, TX, USA
Address: 301 Congress Ave, Suite 2200, Austin, TX 78701 (Pre-acquisition address)
Regional client support, particularly for technology and high-growth companies in Texas and surrounding states, contributing to national research and client events.
Buying Intent Signals for SiriusDecisions
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Executive Team of SiriusDecisions
As of April 2025, SiriusDecisions' leadership includes:
Investors of SiriusDecisions
SiriusDecisions has been backed by several prominent investors over the years, including:
Executive New Hires/Exits in the Last 12 Months
In its final year of independent operation (late 2017-late 2018), SiriusDecisions' executive team was largely stable, focusing on growth and innovation. The most significant executive event was the subsequent acquisition by Forrester, announced in November 2018 and completed in January 2019, which led to the integration of its leadership into Forrester or their departures.
Departures
New Appointments:
Technology (Tech Stack) used by SiriusDecisions
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SiriusDecisions Email Formats and Examples
Prior to its acquisition by Forrester, SiriusDecisions utilized common corporate email address formats. The most frequently used patterns included [first_initial][last_name]@siriusdecisions.com and [first_name].[last_name]@siriusdecisions.com. These domains are no longer active for new email communications.
[first_name].[last_name]@siriusdecisions.com (e.g., john.doe@siriusdecisions.com) and [first_initial][last_name]@siriusdecisions.com (e.g., jdoe@siriusdecisions.com)
Format
jane.doe@siriusdecisions.com
Example
0 (domain is no longer active for new emails post-acquisition)%
Success rate
News and media
Forrester Press Release • November 27, 2018
SiriusDecisions News: Forrester Acquires SiriusDecisions To Create The Leading Platform For Business And Technology Leaders
Forrester announced a definitive agreement to acquire SiriusDecisions for $245 million in cash. This strategic move aimed to combine Forrester's strength in serving business and technology leaders with SiriusDecisions' deep expertise in B2B sales, marketing, and product functions, creating a formidable research and advisory platform....more
Forrester Press Release • January 3, 2019
SiriusDecisions News: Forrester Completes Acquisition Of SiriusDecisions
Forrester officially announced the completion of its acquisition of SiriusDecisions. The integration process began, combining the talent, methodologies, and client bases of both organizations to offer enhanced value and a broader set of solutions to B2B leaders globally....more
Forrester Events • May 6, 2019
SiriusDecisions News: Forrester Unveils First Joint Summit Post-SiriusDecisions Acquisition
Forrester hosted its first major B2B Summit following the acquisition of SiriusDecisions, showcasing the combined entity's vision. The event highlighted the integration of SiriusDecisions' renowned models with Forrester's research to arm B2B marketing, sales, and product leaders with strategies for customer-obsessed growth....more
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