Two Good Agencies.
Different in the Right Ways.
Metric Theory is a San Francisco-based performance digital marketing agency, now part of Media.Monks. They specialize in paid search, paid social, shopping and feed management, Amazon advertising, programmatic media, and audience management for B2B, retail, e-commerce, and technology companies.
This comparison exists to help you decide. We'll tell you what they do well, where we differ, and which option is likely the better fit for your situation. We'd rather you make the right choice — even if that's not us.
What They Offer
Performance marketing and data-driven media at scale
Metric Theory specializes in performance marketing — paid search, paid social, Amazon, programmatic — with a data-driven methodology. As part of Media.Monks, they have access to a global network of tools and capabilities for performance-first digital programs.
Amazon advertising specialization
Metric Theory offers Amazon advertising management as a distinct service. For e-commerce businesses selling through Amazon, that channel-specific expertise is a practical differentiator.
Where Sidestreet Is Different
In-house video production and photography
Metric Theory is a performance digital marketing agency — paid media, SEO, and audience management. Sidestreet adds broadcast-trained video production, commercial photography, and drone aerial alongside digital marketing.
PR and crisis communications
Metric Theory doesn't offer PR or earned media services. Sidestreet operates a dedicated communications practice from a broadcast journalism background.
Part of a large global holding company
Metric Theory is now part of Media.Monks (a S4 Capital company). Sidestreet is independently owned and operated. For clients who prefer working with independent agencies where accountability sits with the people doing the work rather than a holding company structure, that's a meaningful difference.
Church media specialization
Sidestreet operates a church media practice for faith communities. Metric Theory serves commercial B2B and e-commerce clients exclusively.
How to Decide
Metric Theory is probably the right choice if: you're an e-commerce, retail, or B2B technology company that primarily needs performance paid media, Amazon advertising, and audience management at scale.
Sidestreet is probably the right choice if: you need production alongside digital marketing, want PR/crisis communications, prefer an independent agency, serve a faith community, or are outside e-commerce and B2B tech.
If you're genuinely unsure, talk to both of us before committing. Any agency worth working with will give you a straight answer about whether they're the right fit — and so will we.