Castrum
1 known investors
Find your way into Castrum
Castrum Social is a social media marketing agency that connects crypto project owners with local influencers, KOLs, and community moderators (on YouTube, Twitch, Telegram, Discord, Instagram, and Twitter) to run localized influencer marketing campaigns. It focuses on blockchain and crypto startups, working with promoters across regions including Germany, India, the Philippines, Indonesia, Nigeria, Japan, Malaysia, and South America.
Also known as Castrum Social · CS
Investors · 1
Company profile
researched Aug 2026Castrum Social (CS) is a social media marketing agency and network of influencers and local promoters serving crypto and blockchain projects. The agency positions itself as a gathering point where project owners can find representatives to organize campaigns, drawing on a roster that includes social media influencers, keynote speakers and key opinion leaders (KOLs), YouTubers, Twitch streamers, Telegram and Discord moderators, and Instagram and Twitter account administrators.
The agency's stated emphasis is on localized campaigns: it bridges crypto projects with influencers who can produce content in native languages and reach audiences in specific geographies that a project is targeting. Alongside influencer marketing, Castrum Social frames community building as a core requirement for blockchain businesses, arguing that organic community growth is a key success factor for a project's ecosystem.
Castrum Social is one of several interconnected components of Castrum Capital, a venture capital firm focused on early-stage crypto projects; other components named include Castrum Pad, Castrum Legions and Castrum Academy, alongside related entities such as Castrum Istanbul, Castrum Work and Crypto Data Space. A related Castrum Work services page lists social offerings including AMAs and podcasts, Legion support, social media content, and Twitter and YouTube work, as part of a broader service set spanning community, documentation and video, website, 3D art, PR, listing and audit.
Business model
Castrum Social operates as an agency intermediary, matching crypto and blockchain project owners with local promoters, influencers, KOLs and community moderators, and organizing campaigns on their behalf across social platforms such as YouTube, Twitch, Telegram, Discord, Instagram and Twitter.
▸Full profile — market position, go-to-market, geography, history
Market position
Castrum Social functions as the influencer- and social-marketing arm within the Castrum Capital group of components, serving the early-stage crypto sector rather than operating as a standalone agency brand.
The agency attributes its distinction to collaboration with local rather than purely global influencers, on the basis that local promoters can create content in native languages and reach audiences concentrated in the geographies a project targets. It also benefits from being embedded in the Castrum Capital group, which supplies investment, community, technical and partnership resources.
Go-to-market
Inbound contact through its website ("get in touch") and distribution through the wider Castrum Capital ecosystem, whose components provide marketing, community and partnership support to early-stage crypto startups; the group also maintains exchange, business, audit and event partners.
Crypto- and blockchain-related startups, projects and businesses seeking community growth and marketing reach, particularly early-stage teams; portfolio companies of the wider Castrum group are a natural adjacent audience.
Geography
The agency states it bridges clients with influencers in Germany, India, the Philippines, Indonesia, Nigeria, Japan, Malaysia and South America. Related group entity Castrum Istanbul is listed as headquartered in Istanbul, Turkey.
History
Castrum Social is presented as one of the components of Castrum Capital, a full-stack venture capital firm serving early-stage crypto projects, alongside Castrum Pad, Castrum Legions and Castrum Academy, with related brands including Castrum Istanbul, Castrum Work and Crypto Data Space. Castrum Istanbul is listed with Semih Başaran as founder and an employee band of 11-50 in Istanbul, Turkey.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
▸Research sources · 8
primary sources listed
- Castrumcastrum.social · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Castrum do?
- Castrum Social is a crypto-focused social media marketing agency connecting blockchain projects with local influencers and KOLs.
- Who are Castrum's investors?
- Castrum's investors include Castrum Capital.