Upstream

upstreamsystems.com

information technology & services

upstreamsystems.com

England, United Kingdom

201-500 employees

89400000 revenue

LinkedIn Profile

About Upstream

digital subscriptions, operator billing, emerging markets, internet access, cybersecurity, digital services, ad fraud protection, mobile commerce, digital acquisition, mobile marketing, carrier billing protection, software development, customer retention, telecommunications, campaign automation, mobile advertising technology, mobile advertising security, services, mobile user experience, d2c

Upstream's Tech Stack

Decision Makers at Upstream

5 contacts

Natalia Mila

Chief Technology Officer

m***@upstreamsystems.com Sign up to view

Michalis Ergazakis

Cloud Platform Engineering Manager

e***@upstreamsystems.com Sign up to view

Antonis Thodis

Director of Software Engineering

a***@upstreamsystems.com Sign up to view

Elli Leno

Performance Marketing Director

e***@upstreamsystems.com Sign up to view

Rodrigo Mello

Sales Director LATAM

r***@upstreamsystems.com Sign up to view

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13 technologies detected · 5 decision makers · Emails available

Sales Outreach Angle

HubSpot users typically run inbound-led sales motions. Products that integrate with HubSpot (email automation, CRM enrichment, ABM platforms) are natural fits.

Upstream's Position in the StackWho Database

• Upstream is 1 of 194,140 information technology & services companies tracked in StackWho.
• 193,618 information technology & services companies in our database have verified decision-maker emails (100% of the cohort).
• 47,721 companies in England are in the StackWho database.
• 4,373 information technology & services companies are in the 201-500 employee range (same size as Upstream).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated August 2026.

Frequently Asked Questions

What technology does Upstream use?

Upstream uses Gmail, Google Apps, MailChimp SPF, Microsoft Office 365, WP Engine, Atlassian Cloud, and 7 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at Upstream?

StackWho has verified email addresses for 5 decision makers at Upstream. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Upstream directly for sales, recruiting, or partnerships.

What industry is Upstream in?

Upstream operates in the information technology & services industry, headquartered in England, United Kingdom. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export Upstream's contact data?

Yes. StackWho Pro members can export decision maker contact data for Upstream and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.