About Seastream
Built by agency people, for agency people.
Seastream was not founded by an outsourcing company looking for clients. It was founded by someone who spent twelve years inside one of Europe's largest independent agency groups, seven of them running its Belgian media agency, and who saw what was breaking from the inside.
The gap we were built to close.
Agencies are delivering more scope on less budget. Clients cut spend without cutting ambition. Production teams are asked to hold output while margins shrink.
Conventional outsourcing answers that with commodity talent, a surface-level service and no real grasp of how an agency actually works — which is why it so often ends up costing more in supervision than it saves in rates. We were built specifically against that failure mode: the specification is captured, the approvals are explicit, and the supervision is ours rather than yours.
Régis Watrisse
Founder. Over twenty years in digital marketing, advertising and entrepreneurship — twelve inside the Serviceplan Group, seven as Managing Partner of its Belgian media agency.
He spent twelve years inside the Serviceplan Group, one of Europe's largest independent agency networks. He co-founded Mediascale and ran it under that name for six years. Mediascale then acquired Mediaplus and took its name, and he remained Managing Partner of the Belgian agency until October 2023.
Before that he was Digital Marketing Director at Plan.Net, another Serviceplan division, working across media planning, performance marketing, social and web development for four years.
He had also built and run his own ventures before joining the group — an e-commerce business operating across the Benelux, France and England, and a digital marketing consultancy for smaller companies — with two years advertiser-side in between. That matters to how Seastream runs: a founder-led business, with the rigour of someone who has delivered at agency-group scale.
Two locations, each for a reason.
The structure is deliberate: contract in Europe, deliver where the talent and the languages are.
Brussels region
Seastream Media Europe, Pegasuslaan 5, 1831 Machelen. Contracting, commercial relationship and data protection sit with a European entity, under European law. For an agency procurement team that is usually the first question, and it is the reason the entity exists.
Production and operations
Seastream Media Ltd (BRN C24204530). Creative production, media operations and development are delivered from Mauritius — a genuinely bilingual French and English market, in a time zone that gives around five hours of overlap with Central European Time and hands European mornings completed work.
Delivery is in Mauritius. We do not present it as anything else, and we do not claim a presence we do not have — an earlier hub in Algeria has been discontinued and is not part of how we deliver.
Four commitments we are prepared to be held to.
We say what we can and cannot do
If a capability is not ready, we say it is not ready. You will find that stated in several places on this site, including where it costs us a sale.
We work under your brand where asked
White-label engagements are normal. Your client deals with your agency, and nothing we produce says otherwise.
We treat confidentiality as structural
Everyone handling client material works under a non-disclosure agreement, and access is scoped to the role that needs it.
We own recurring errors
A correction that keeps recurring is a defect in our specification, not an individual's mistake. Fixing it is our cost, not yours.
A conversation, not a pitch.
Tell us where delivery is hurting. If we can help, we propose a scope. If we cannot, we say so and tell you what would.