Run a small B2B company? Then you probably know how this goes. Most of your customers came from referrals, or from the founder’s network, or from that one trade show three years ago. It works. Until it doesn’t, and suddenly you’re looking at agency websites full of Fortune 500 logos and retainers that cost more than your whole marketing budget.
So what does demand generation even mean at your size? In plain words, it’s everything that has to go right before a stranger decides to book a call with you: they find you, they come to trust you, and they still remember you when the budget finally opens up.
I put this list together for companies of roughly a handful of people up to a hundred or so, selling to other businesses rather than consumers, where one new client can be worth tens of thousands, and where you can’t afford to spend six months on an agency that turns out to be built for someone else.
How did I pick these seven?
I looked for agencies that clearly work with smaller B2B firms, or at least say plainly which stage they’re built for. Then I asked three questions of each one. Is it obvious who they’re for? Can they show real results with real numbers? And will you have a rough idea of the cost before your first call?
Every claim below comes from each agency’s own website as it read in late October 2026. If I couldn’t confirm it there, I left it out.
One more thing before we start. Content RevOps is my company, and it’s first on this list. You should know that, and you can weigh my opinion of it accordingly.
How do they compare at a glance?
| Agency | What they mainly do | Best for | Prices on the site? |
|---|---|---|---|
| Content RevOps | Content plus the CRM and tracking behind it | Small B2B firms tired of living on referrals | Yes, from $2,000 a month |
| Market Veep | HubSpot, lead generation, and sales enablement as one system | Small firms already on HubSpot or about to be | Point pricing, no figures |
| Kalungi | An outsourced marketing team for SaaS | SaaS companies from seed up to about $10M in annual recurring revenue | Packages by revenue band, no figures |
| Sagefrog | Full-service B2B marketing | Healthcare, tech, industrial, and professional services firms | No |
| Hey Digital | Paid ads for B2B SaaS | SaaS teams ready to put real money into ads | No |
| SalesHive | Cold calling, cold email, appointment setting | Firms that need meetings booked soon | One flat monthly fee, amount not listed |
| Callbox | Managed outbound across phone, email, LinkedIn, and events | B2B firms selling into larger accounts | No, cost depends on scope |
1. Content RevOps
Who it suits: small B2B companies that have outgrown referrals but don’t want to burn money on ads that stop working the day you stop paying.
I started the company in 2024 after seeing the same setup again and again. In most small firms, marketing sits with a freelancer. The tech side, so the website and the CRM, sits with an IT person or a CRM consultant. And those two people have never once spoken to each other. So the blog posts get written, the leads get captured somewhere, and nobody can tell you which article brought in which client.
We’re a demand generation agency that does both halves. We write the content your buyers want to read before they’ll talk to you, and we build the wiring underneath it: CRM, website, tracking. One caller described it to me as bridging the IT and marketing gap, which is better than anything I’d come up with. The technical work you’d normally pay a developer for just gets built into ordinary marketing.
What has that looked like for small clients?
- Radius, an early-stage startup with a team of two, took cost per lead from $150 to about $45, cut paid spend in half while leads went up, and added $15k in new monthly recurring revenue from organic sign-ups.
- Behavior Advantage, a small expert-led firm, went from around $500 per lead to $10, and customer acquisition cost fell from $2,500 to $600.
- Banking Crowded, a boutique fintech research firm, went from about 15 inbound leads a month to between 120 and 150, and about 22% of their inbound traffic now comes from AI assistants like ChatGPT.
Pricing is on our site, which I think more agencies should do. Small companies and startups pay about half our standard rates. Consulting, where we design the system and your team runs it, starts at $2,000 a month. Month to month, no lock-in.
Worth knowing: we’re young, founded in 2024, so there aren’t many reviews yet (5.0 on Google from five, 5.0 on Clutch from one). And we only work with B2B companies where the sale takes a while and trust matters. If you sell to consumers, we’re not your people.
2. Market Veep
Who it suits: small B2B firms that live in HubSpot (or keep meaning to move there).
You’ll see the words HubSpot Diamond Partner on their homepage within about two seconds. Their whole idea is that lead gen, sales enablement, and HubSpot shouldn’t be three separate projects, they should run as one thing. If your sales people and your marketing already share a CRM, I can see why that’d appeal.
What I liked more is who’s in their case studies. Oil, manufacturing, regional businesses. So many agency lists are SaaS all the way down, so this was a nice change. Whatley Oil, a regional oil supplier in the southeastern US, pulled in 5,781 leads in year one off a geo-targeted site and paid campaigns (Facebook ads did most of the heavy lifting there, oddly enough). A manufacturer’s site redesign tripled its organic traffic.
Two smaller things caught my eye. Pricing works on points, so if you want to shift budget from the website to ads next month, you can do that without paying more. And they say they’ll waive HubSpot’s $3,000 onboarding fee, which for a small team isn’t nothing.
Worth knowing: you won’t find a dollar figure anywhere, so it’s a call before you know the cost. And if you’re not on HubSpot and have no plans to be, a lot of the point falls away.
3. Kalungi
Who it suits: small SaaS companies that need a whole marketing department and can’t hire one yet.
Kalungi calls itself a full-service B2B SaaS marketing agency, and they’re specific about stage, which I appreciate. They split their offer by revenue. Pre-product-market-fit or seed companies (up to $1M in annual recurring revenue) get their systems and coaching. Teams between $1M and $5M get senior marketing leadership working alongside them. Companies at $5M to $10M get a full done-for-you team, and they say pay-for-performance is available there.
The results on their homepage are solid and named. DataGuard went from no marketing to $4M in pipeline in under six months. Avid grew from under $300K to more than $3M in annual recurring revenue. One Click Contractor saw a 164% jump in organic leads after a website and content rebuild. They say they’ve worked with more than 280 SaaS companies.
Worth knowing: SaaS only. If you’re a consultancy, a manufacturer, or a services firm, look elsewhere on this list. No prices published.
4. Sagefrog
Who it suits: healthcare, life sciences, tech, industrial, and professional services firms that would rather have one agency do the lot.
They’ve been going 23 years, apparently. Team of 35, more than 650 clients over that time, and they put retention at 95%. It’s a proper full-service shop, so branding, websites, content and inbound, plus old-school traditional marketing too (I didn’t expect to see that on a B2B agency menu in 2026, but here we are).
Why’d I put them on a small-business list? Industry knowledge, mostly. Say you sell medical devices or industrial kit. An agency that already gets how engineers and procurement teams pick through a website saves you months of explaining your own market to them.
Worth knowing: doing everything means they’re broad. Need pipeline from just one channel? A specialist could get you there quicker. Pricing isn’t on the site.
5. Hey Digital
Who it suits: B2B SaaS companies ready to spend properly on paid ads and wanting proof it’s working.
Hey Digital only does paid media, and only for B2B SaaS. They say they’ve worked with more than 200 SaaS companies and manage over $2.3M in monthly ad spend. The angle I liked is that they talk about pipeline and revenue rather than clicks. One client quote on their site says they helped prove paid ROI to the company’s CRO and leadership. Another client grew sign-ups 119% while cutting cost per acquisition 54%. PostHog is one of their named clients.
Worth knowing: this is ads, full stop. Once you stop spending, the leads stop too, so it pairs best with something that builds over time. And at very small budgets, the agency fee can eat a big share of what you spend. No prices on the site.
6. SalesHive
Who it suits: small B2B teams that need meetings on the calendar this quarter, not next year.
SalesHive does outbound: cold calling, cold email, and appointment setting, with US-based sales reps and their own AI tools doing the list building and personalisation. They say they’ve launched more than 1,500 client accounts and booked over 106,000 qualified meetings. To their credit, they note those are meetings booked, not meetings attended or deals closed.
For a small firm, the commercial terms matter as much as the results. They charge one flat monthly fee covering the reps, a strategist, data, and tools, with no setup fee. Month-to-month plans are available, and you don’t pay anything until you approve the campaign for launch. One of their case studies is an independent commercial insurance agency that booked 596 meetings over nearly four years, which is about as small-business as it gets.
Worth knowing: outbound gets you conversations, but it doesn’t build anything that lasts once you stop. The monthly fee isn’t listed on the site.
7. Callbox
Who it suits: B2B firms going after bigger accounts who want outbound running on several fronts at once.
Callbox does managed lead gen. The AI picks and ranks the accounts; real humans then pick up the phone, figure out if there’s interest, and get the meeting booked. They’ll come at a prospect by phone, email, LinkedIn, chat, even events, and in more than one language if you sell abroad. Reviews look good too: 100+ on Clutch at 5.0 and 85+ on Google at 4.5, according to their site. One campaign on their site got 146 sales appointments in four months.
Worth knowing: Google and Microsoft are on their logo wall, so it’s fair to ask whether they’ve done this for someone your size. Price depends on your market, the channels, and how many languages, which means you’ll be on a scoping call before you see a number.
So which one should a small B2B business pick?
I’d start with where your next ten customers are most likely to come from.
If you need meetings next month, SalesHive or Callbox will get you conversations faster than anyone else here. If you’re SaaS and want a full team, Kalungi. If ads are already working and you want them working harder, Hey Digital. If HubSpot is the centre of your world, Market Veep. And if you’re in a specialist industry and want one agency for all of it, Sagefrog.
But if your real problem is that every new client still comes from someone you already know, and the website, the CRM, and the content have never actually been connected, that’s the gap I started Content RevOps to close.
Whoever you talk to, ask them one question early. What will I be able to measure in 90 days that I can’t measure today? You’ll learn a lot from how quickly they answer.
Usama Bin Qasim is an SEO expert and content writer with 6+ years of experience in SEO and digital marketing. He writes practical SEO guides, SaaS and software reviews, tool comparisons, and digital marketing content based on hands-on research and real-world experience.
