Flobase builds outbound systems for B2B companies: ninety days of list building, email infrastructure, LinkedIn and webinar campaigns, then a handover, after which the client’s team runs the system it now owns. James Mason started it in London in 2020 and has run LinkedIn outreach on Expandi for close to four years. The brand relaunched in 2026 when his brother Harry Mason joined, after two and a half years as Head of RevOps at the GTM agency ColdIQ.

Flobase says it has installed Expandi for 165 brands, and taught 77 more through its LinkedIn and Expandi course. Every client runs on Expandi the same way: the client signs up for its own workspace, Flobase is invited in to run it, and at handover the client keeps the seat and everything in it.

Being able to use so many things on the platform is almost like having LinkedIn inside one platform, rather than having to open LinkedIn.

Company	Flobase, London, founded in 2020 by James Mason; brand relaunched in 2026 when Harry Mason joined
What it does	Outbound systems for B2B companies, built in 90 days and handed over
Clients	165 brands set up on Expandi by Flobase, from enterprise software to financial advisory; 77 more taught through its LinkedIn and Expandi course
On Expandi	Flobase’s own profile plus the client workspaces it runs
Since	James: close to four years. Harry: three years, first at ColdIQ
Why Expandi	Account safety first, then features that do what they say

Flobase builds GTM systems and sells to B2B brands looking to scale revenue without adding headcount, primarily through cold email and LinkedIn. That shapes what it needs from a LinkedIn tool. The first question every prospect asks, Harry says, is about account safety. The second problem is one he knows from the agency side: the market is full of LinkedIn tools, each with a new offer, and features that are sold but do not work once you sign up.

Harry remembers a tool with no way to control connection volume at all.

“I was using another tool before, and there was no way to control the number of connections. It just said: we’ve stayed within the limits, you can’t control them. That’s scary, because you also do your manual thing on LinkedIn.”

A warning on a client’s LinkedIn account is the one thing an agency cannot afford, James says.

We’ve had plenty of warnings with other tools, but never with Expandi. For us that is the most important thing. Imagine the amount of trust we lose if an account gets a warning, let alone anything else. Almost all of the trust is gone with a customer at that point.

Safety first, then features that work

Harry gives two reasons Flobase runs every client seat on Expandi. One: safety, because you know the limits and you control them. Two: the features do what they say, whether that is scraping event attendees, post engagers or finding emails. That makes the pitch to a new client simple.

“One of the nicest mental releases with Expandi is knowing that safety is not going to be an issue, because you’re so educated on the limits and you have so much control over them. When I have to pitch another company on installing Expandi, it becomes a much easier decision. Look, we’ve been using them for three years, no accounts banned, nothing has ever gone wrong the way it shouldn’t have. Results are one thing, but the platform is delivering exactly what it’s meant to deliver.”

James, who teaches new teams the tools, puts it more bluntly.

“After testing all the other tools out there, Expandi is the only one where, when it says it will do something, it actually gets the job done. A lot of these sites sell features that simply do not work once you sign up. For us, especially when it comes to teaching people who are brand new to this space, making sure that what you’re showing them works has been incredibly important.”

One platform instead of six

When the brothers started Flobase they could not pay for every tool in Harry’s old ColdIQ stack. LinkedIn tools all cost about the same, he says; what differs is how much each one does. Expandi scrapes event attendees and post engagers, which removed PhantomBuster from the stack, and it finds emails, which matters when a campaign goes multichannel.

For most GTM engineers, Expandi can replace about six tools. Then you have Expandi, an email sender, and maybe a database. You get the ability to run tons of plays on a very lean stack.

The client owns the workspace

Every Flobase client signs up for its own Expandi workspace and invites Flobase in to run it. When the ninety days are up, the client keeps the seat, the campaigns and the data.

Onboarding starts with the client’s voice: if they already send messages, Flobase models the hooks, calls to action and social proof they use; if not, it tests offers until one works. Then it sizes the audience in Sales Navigator, filtered to people who posted in the last thirty days or pay for LinkedIn, because the question on LinkedIn is not whether a message landed but whether the person opens the platform. Which campaign a client gets depends on where they start.

“The customer decides, at the end of the day. A lot of our clients carry over hundreds, if not thousands, of connections from their career, and it’s a complete mess. So we start with what already works: how they’re selling today, and the connections in their current network they haven’t reached out to or didn’t know they had.”

Before	Now
An SDR copy-pasting every message and hunting for a reason to reach out	Signals built in: event attendees, post engagers, job changes
A LinkedIn tool with no control over connection volume	Limits set per seat, and understood
PhantomBuster for scraping, another tool for sending	Scraping, sending and email finding in one platform
Clients handed a lead list they did not want to work by hand	Clients run the seat themselves after the handover

Over the 90 days to 2 November 2026, Flobase’s own profile sent 119 connection requests, and 57 were accepted, or 48% (median Expandi account: 25%). In the same period it logged 51 replies, a reply-to-acceptance ratio of 89% (median: 22%), and sent 554 messages to people already in its network.

165	brands set up on Expandi by Flobase
48%	of connection requests accepted on Flobase’s own profile (median: 25%)
89%	reply-to-acceptance ratio (median Expandi account: 22%)
554	messages to the existing network in 90 days
350+	calls booked for one client in six months
$3.1M	raised by that client, all through Expandi

The biggest client outcome so far belongs to Alzheimer’s Treatment Centers of America, whose investor outreach Flobase ran entirely on Expandi.

They booked over 350 calls in six months, raising $3.1 million, all through Expandi.

Asked to describe the system in a sentence, the brothers gave two.

Prospects go in, they get tiered and qualified, and leads come out the other end. Prospects in, leads out.

“Strangers go in, leads get created, calls get booked, and customers come through LinkedIn.”

Flobase already runs its cold email, call prep and CRM through agents on Grok Bot. Expandi is next: Harry wants to replicate on Expandi an experiment where he let an agent run a LinkedIn tool for a week, and James is putting close to four years of LinkedIn data to work in new ways. Harry’s advice to anyone choosing a LinkedIn tool for client work:

“I wouldn’t pick a LinkedIn tool because it has the most AI capabilities. I’d pick the one that’s the safest, most trusted and most versatile, over the new fancy tools.”