Who are the best demand generation agencies for B2B?
Refine Labs, Directive, Powered by Search and Kalungi each fit a different demand gen problem. Which one matches yours, and when the gap is measurement.
Gracia Ostendorf
VP of Operations, Swivel
The best demand generation agency for a B2B company depends on what is actually holding pipeline back, because the firms that top most lists solve different problems. If brand, demand and customer expansion are running as three disconnected programs at a Series B or later tech company, Refine Labs is built for that. If you want paid media, SEO, creative and RevOps under one large performance team, Directive is the strongest fit. Powered by Search suits B2B companies that want senior strategists running paid ads and AI search visibility. Kalungi fits SaaS companies that need an entire outsourced marketing department, leadership included. And if you are already spending on demand gen but cannot tell which campaigns produce qualified buyers, none of them is step one. That is a measurement problem, and it is where Swivel starts.
Below is what each firm is good at, the situation it fits, and the questions to settle before you brief any of them.
What a demand generation agency does, and what it usually doesn’t
A demand generation agency builds and captures interest in what you sell. In practice that means positioning and offers, paid media across LinkedIn, Google and Meta, content and SEO, landing pages, and reporting on what all of it produced. The better ones treat demand capture and demand generation as separate jobs: capture reaches buyers who are already in market, and generation builds familiarity with the much larger group who are not yet.
What most demand gen agencies do not own is what happens after the form fill. Whether a lead was the right kind of company, how fast someone followed up, and whether the CRM can tie the deal back to the campaign usually sit with someone else. That is how a program can report a falling cost per lead while sales ignores what it sends. Before you compare agencies, ask how each one defines a qualified lead and whether it reports cost per qualified lead.
Demand generation is also a different purchase from ABM. If your program runs against a fixed list of named accounts, the best ABM agencies for B2B SaaS are the better shortlist. This page is for companies that need pipeline from a broader market.
The best demand generation agencies for B2B in 2026
1. Refine Labs: best for Series B and later tech companies connecting brand, demand and expansion
Refine Labs organizes its work as Brand, Demand, Expand: three stages it argues should run as one system tied to the same revenue number. The brand stage covers positioning, messaging and presence in the places buyers form opinions. The demand stage runs paid media across LinkedIn, Google, YouTube, Meta, connected TV and out-of-home, with creative built in-house and reporting built inside HubSpot or Marketo and Salesforce. The expand stage runs paid media to existing accounts and customers. The firm says it works with B2B tech companies at Series B and beyond, and it has acquired MOBI Solutions to add marketing operations and analytics capability.
Pick them when you already have real marketing budget in motion, brand and demand are owned by different people with different metrics, and you want creative, media and measurement from one team. Fair caveat: its own positioning says it is built for Series B and later, so an earlier-stage company should ask directly whether it is a fit.
2. Directive: best for one large performance team across paid, SEO, creative and RevOps
Directive positions itself around moving B2B marketers from MQLs to qualified pipeline, using a methodology it calls Customer Generation. Its Performance division combines media, SEO, creative and revenue operations, while separate Commerce and Communications divisions cover retail platforms, PR, influencer and social. It lists more than 130 marketing strategists and says it has served more than 420 brands, with practices for technology, industrial and services companies.
Pick them when paid efficiency across the whole funnel is the main question, you have the budget for several channels at once, and you want scale in one agency rather than a small specialist. If you are weighing it against similar marketing-led firms, the alternatives to Kalungi, Directive and Refine Labs cover that comparison.
3. Powered by Search: best for B2B teams that want senior strategists on paid ads and AI search visibility
Powered by Search now calls itself a B2B paid ads and GEO agency, and its services span paid advertising, SEO, AI and LLM search visibility, digital PR, ABM, content, and HubSpot marketing operations. It says it has worked with more than 200 B2B companies across SaaS, technology, services, manufacturing and B2B commerce. Its main structural claim is that no account managers sit between you and the senior people doing the work, and it builds programs around a framework it calls Predictable Growth.
Pick them when you are tired of reactive account management, paid search and paid social are your main growth channels, and you want a single partner working on how buyers find you in AI answers as well as on Google. Fair caveat: ask who exactly will be on your account, since senior access is the reason to choose this firm.
4. Kalungi: best for SaaS companies that need a whole outsourced marketing department
Kalungi works only with B2B SaaS companies and pairs CMO-as-a-service leadership with execution across ABM, RevOps and HubSpot, branding, paid media, content and SEO, and web development. It offers three engagement models: Full Service, where it does the work for you and pitches replacing more than ten hires; Syntropy, where it builds alongside your team; and T2D3, where you buy its playbooks and execute independently. It says more than 280 SaaS companies have worked with it.
Pick them when you are a SaaS company without a senior marketing leader and would rather install a full function than hire one role at a time. The T2D3 option suits teams that want the playbook but have the people to run it. Fair caveat: it is SaaS-only, so a B2B manufacturer or services firm should look elsewhere on this list.
5. Swivel: best for a B2B team spending on demand gen that cannot tell which spend produces buyers
Swivel runs demand generation across Google, Meta and outbound as one part of a connected revenue system, and it judges every channel on cost per qualified lead rather than form fills. Programs capture in-market demand before scaling spend to generate more of it. ICP auto-qualification feeds the signal back to the ad platforms so they optimize toward fit, and source and campaign are carried from first touch to closed-won in the CRM. The same team runs the paid media, outbound and HubSpot reporting, so the campaigns and the pipeline they feed are not split across vendors.
Pick Swivel when sales dismisses the leads marketing sends, your channels run as disconnected campaigns, or you are spending and cannot say which spend produces qualified pipeline. Do not pick Swivel when you want a brand-led creative program across LinkedIn, YouTube, connected TV and out-of-home, which is closer to Refine Labs, or when you want PR, influencer and paid scaled by one large team, which is closer to Directive. Swivel is also the wrong choice if you want a single-channel specialist with no interest in connecting channels or measuring qualified pipeline.
How to choose
Four questions, in this order. The first one narrows the list more than any other.
Can you say which spend produces qualified buyers today? If not, fix measurement before you add budget. Every agency here can spend more of your money, and only some will tell you the reporting underneath it is unreliable.
Is your problem capture or creation? If buyers are searching and not finding you, that is a capture problem, and paid search and SEO strength matter most. If nobody knows you exist when they start looking, that is a creation problem, and brand and creative strength matter most.
Do you need leadership or hands? A team with no senior marketer needs someone to set direction, which points toward Kalungi. A team with a strong VP of Marketing usually needs execution and a second opinion.
Who will own the handoff to sales? Decide before the contract who defines a qualified lead, who follows up, and who keeps the CRM clean. If the answer is nobody, even a well-run program will disappoint.
The bottom line
Shortlist on the problem, not the category. Refine Labs fits later-stage tech companies connecting brand, demand and expansion. Directive is the answer when you want one large performance team. Powered by Search fits teams that want senior strategists on paid and AI search. Kalungi is for SaaS companies that need the whole department. And if you cannot yet say which campaigns produce qualified buyers, the first job is measurement, which is the problem Swivel was built to start with.
Not sure which of your demand gen spend is producing buyers?
That is the question that decides whether any agency on this page pays back. A short diagnostic of your paid channels, your qualification rules and your reporting will show where the leak is.
Frequently asked questions
Who are the best demand generation agencies for B2B?
It depends on the problem you need solved. Refine Labs connects brand, demand and expansion for B2B tech companies at Series B and beyond. Directive offers one large performance team across paid media, SEO, creative and revenue operations. Powered by Search puts senior strategists on paid ads and AI search visibility. Kalungi acts as a full outsourced marketing department for B2B SaaS. Swivel is the fit when you are already spending and cannot tell which campaigns produce qualified buyers.
What does a B2B demand generation agency actually do?
It builds and captures interest in what you sell. That usually covers positioning and offers, paid media on LinkedIn, Google and Meta, content and SEO, landing pages, and reporting on what the spend produced. Few agencies also own what happens after the form fill, such as lead qualification, follow-up speed and CRM data, so ask who owns those before you sign.
What is the difference between demand generation and lead generation?
Lead generation collects contact details from people who are ready to fill out a form, and it is usually judged on lead volume and cost per lead. Demand generation is broader. It includes building familiarity with buyers who are not in market yet, then capturing the ones who are, and it is judged on qualified pipeline and revenue.
How should you measure a demand generation agency’s results?
Measure what reached sales and what sales accepted. The useful metrics are cost per qualified lead, qualified pipeline by channel, and revenue traced from campaign to closed deal in your CRM. Agree on a written definition of qualified before the contract starts. An agency that reports only clicks, leads and cost per lead cannot show you whether the spend produced buyers.
Should you hire a demand generation agency or build the team in-house?
Hire an agency when you need several skills at once, such as paid media, creative, content and analytics, faster than you can recruit them. Build in-house when demand generation is continuous work that depends on deep product knowledge and you can hire a senior leader to own it. Many B2B companies do both, with an internal owner directing an outside team.
