Social Media Agency vs In-House for B2B: The Real Math

Channel work that converts is senior work: community-voice writing, moderator-safe judgment, substantive replies. Done daily across even one channel, that's 1.5–3 focused hours a day. Price it honestly: the Editorial Freelancers Association's rate survey puts business and marketing ghostwriting at $87.50–125/hour, so 30–60 senior hours a month is $2,600–7,500 of labor at market rates, before strategy, monitoring or reporting. "Just post" assigned to whoever is free ignores that math, which is why it produces the standard corpse: six posts, then silence, then a channel your buyers can see was abandoned.

Four honest cases. The founder genuinely likes writing and will protect 5–7 hours a week for it. Someone on the team already lives on the target channel and knows its norms natively. The brand voice is inseparable from daily product work (deep technical content, regulated nuance). Or you only need one channel and can staff it properly. In-house's real edge is proximity: the raw material (what shipped, what broke, what the customer said) is in the room, in real time. If you have the writer and the hours, that proximity beats any agency.

The content mill: generic posts generated from your website and a trending-formats calendar, zero engagement work, and a monthly report of impressions. The tells are checkable before you sign. No recurring call with you means no extraction, which means generic output (the mechanism is in our LinkedIn cost guide). No engagement deliverables (commenting, replies, DM handling) means you're buying words, not distribution. And pods or automation mean rented reach that platforms are actively shutting off: LinkedIn's policies prohibit pre-arranged engagement, and it has said publicly it wants pods "entirely ineffective".

What you're actually buying at a good agency: a system (positioning, target lists, cadence, reporting) instead of improvisation; bench, so the channel doesn't go quiet during your product crunch or their writer's holiday; and pattern recognition across accounts, so your program skips the mistakes each channel punishes. There's also the key-person risk you avoid: an in-house person who gets good at this becomes hireable, and the skill leaves with them. The economics only work if the price beats the senior-hours math above; a flat $2,000–2,500 per channel does, which is the point of productizing it.

Founder supplies the substance, agency runs the system. In practice: a 30–45 minute weekly call where the raw material gets pulled out of you (what you shipped, what you disagree with, what surprised you), then everything else (writing, daily engagement, monitoring, reporting) happens without you. That division is exactly how RouterGrowth's services are built, and it's also a fair test for any provider: whoever isn't asking for recurring time with you is planning to write near you, not as you.