7 Inbound Marketing Agencies for B2B SaaS, Vetted for AI Search

An inbound marketing agency for a B2B SaaS company has one job. It gets buyers to find you, trust you and ask for a demo or start a trial without a sales rep chasing them first. In 2026 that discovery happens in two places. Buyers still search Google. They also ask ChatGPT, Perplexity, Gemini and Google's AI Mode which tools to shortlist.

G2 surveyed 1,076 B2B software buyers in March 2026. 51% said they now start research with an AI chatbot more often than with Google, up from 29% a year earlier. 69% said they picked a different vendor than planned because a chatbot recommended it (G2). An inbound agency that only writes blog posts for Google rankings misses the place where half of these buyers now start.

I run Flying Cat, so I have a stake in this list. I put my agency first and say so openly. For every other agency I checked its own website in October 2026 for current services, named clients, location and pricing. Where a site does not state something, I say that instead of guessing. I left out tools, directories and agencies whose main offer is paid media or PR.

How I vet an inbound marketing agency

I have hired, replaced and worked alongside agencies and freelancers for more than 15 years. These are the checks I run before I would trust anyone with a B2B inbound budget, including the questions I expect prospects to ask Flying Cat.

They report on demos, signups and pipeline

Ask for a sample monthly report. The first numbers should be demo requests, trial signups, sales-accepted opportunities or pipeline from organic search and AI assistants. Traffic, rankings and impressions belong lower down as leading indicators. Leapsome's team made sales-accepted opportunities (SAOs) its main metric in 2024. Its organic and AI-sourced SAOs grew 48% from the first half to the second half of 2025, even as non-branded clicks fell (Leapsome case study). An agency that leads with traffic would have reported that year as a decline.

They know which pages convert

Ask the agency to show conversion rates by page type from a past client. At an enterprise procurement platform we work with, one decision-stage page converted at 17%. High-traffic educational pages converted at 0.24% (case study). That comparison decided where the content budget went. A good agency starts with comparison, alternatives, pricing and use-case pages before it fills the top of the funnel.

They measure AI visibility with a prompt set

Ask how they would track your brand in AI answers. I expect an agreed list of buying prompts, run repeatedly across several assistants, with your mention rate and citations reported against named competitors. I also expect a "Where did you hear about us?" field on demo and signup forms. AI referrals often land in analytics as direct traffic, so self-reported attribution fills in what GA4 cannot see. Our guide to measuring AEO shows the setup.

They plan for clicks you will not get

Seer Interactive studied 3,119 informational queries across 42 client organizations. On queries with an AI Overview, organic click-through rate averaged 0.61% in September 2025, down from 1.76% in June 2024. Brands cited inside the AI Overview earned about 35% more organic clicks than brands left out (Seer Interactive). Ask the agency how it adjusts the content mix for that drop. The answer should cover fewer generic explainers, more decision-stage pages and work to get cited in the answer itself.

They work off-site as well as on-site

AI assistants build shortlists from third-party roundups, review sites and publications as well as your own site. Ask how the agency earns placements on the pages that AI answers cite for your category. D2L's outreach moved from general link building to exactly those roundups (D2L case study). Your own comparison content helps too. In my research for The Search Spot, vendors whose own listicle was cited in an AI answer were named in 45.4% of those answers, against 16.3% when it was not cited (The Search Spot).

A senior strategist stays on your account

Ask who sets the strategy after the contract is signed and how many accounts that person carries. Ask also who writes your content and whether those writers know your vertical. Get the answer in the contract, with the strategist named.

Their platform skills fit your stack

HubSpot partner tiers tell you about CRM, automation and website skills. They say little about search strategy or content quality. If you need both, check each separately, or hire two partners with clear owners.

They tell you what happens in the first 90 days

Ask for the deliverables, owners and dates of the first three months in writing. I expect research, a prioritized page plan, tracking fixes and the first published pages inside that window. Ask also about minimum terms. A six- or twelve-month lock-in with no early milestones puts all the risk on you.

Inbound marketing agencies compared

1. Flying Cat

Best for: B2B SaaS companies that want search and AI assistants to drive demo requests and signups, in English, French, German, Italian or Spanish.

Flying Cat is the founder-led boutique I run. I lead strategy on every account and work with freelance specialists who know the client's vertical. We sell SEO and AI search programs for B2B SaaS, built around the pages and placements that bring in demos and signups. Content, technical fixes and off-site work all serve that goal.

These results come from published case studies.

• Operto: We started with bottom-funnel pages such as "buy hotel door lock", then built clusters for each hospitality vertical. Operto grew ARR 400% in 12 months and tripled inbound leads in 11 months. Organic search became its top driver of inbound revenue (Operto case study).
• Mixmax: We wrote each article to rank on Google and to work on LinkedIn, with quotes from Mixmax's team and industry experts. Blog-assisted demo requests grew 500% in ten months (Mixmax case study).
• D2L: Demo requests from organic search and LLMs grew 73% in D2L's first year with us. Demo requests from ChatGPT grew 3.2x year over year. One higher education deal closed in 11 days after the provost had asked ChatGPT how Brightspace compared with the incumbent (D2L case study).
• Leapsome: We picked pages by their MQL-to-SAO conversion rate instead of by traffic. Organic and AI-sourced SAOs grew 48% from the first half to the second half of 2025. A non-branded click became 2.3x more likely to turn into an SAO (Leapsome case study).

Services: SEO strategy, content creation, GEO and AEO, technical SEO, international SEO in French, German, Italian and Spanish, and link building and placements inside full programs.

Pricing: Every program starts with a $5,000 Strategy Launch that takes 3 to 5 weeks. Advisory starts at $2,000 a month, programs at $4,000 a month and full-service SEO at $7,000 a month.

Clients with published case studies: Operto, Mixmax, D2L, Leapsome, Softr, Bizzabo, ActiveCampaign.

2. SmartBug Media

Best for: Mid-market B2B companies on HubSpot that want strategy, content, paid media and CRM work from one large team.

SmartBug Media describes itself as a full-service digital agency and its demand generation work as built on inbound principles. Its site lists content, SEO, paid media, PR, revenue operations, sales enablement, website development and a full HubSpot practice. It also sells AEO and AI services, including AI agent development and Breeze AI onboarding. SmartBug is a HubSpot Elite Partner with eight HubSpot accreditations. It says HubSpot named it 2025 North American Partner of the Year. Ryan Malone founded it in 2007. The company is remote-first with nearly 300 people. Adam Bleibtreu became CEO in July 2025 (SmartBug about page). Industries on its site include SaaS, healthcare, manufacturing, finance and education. Named case studies include Ashling Partners and MW Components, with testimonials from TestMonitor and Healthcare Bluebook.

3. New Breed

Best for: B2B companies that want inbound marketing and the HubSpot and revenue operations setup behind it.

New Breed calls itself a full-service growth agency and HubSpot consultancy for B2B companies. It says it has worked with HubSpot for almost two decades. Its site describes it as an Elite HubSpot Solutions Partner and a three-time HubSpot Top Partner in North America. Listed expertise covers inbound sales and marketing, demand generation, account-based marketing, content, SEO and AEO, paid advertising, website development and revenue operations. It also sells a lead routing app called Distributely. The homepage names Talmundo, an employee onboarding provider, in a case study and shows other client logos without labels. The site does not state a location.

4. Lean Labs

Best for: Seed to Series C B2B SaaS and tech companies on HubSpot that want AI search work tied to a lead generation website.

Lean Labs focuses on B2B SaaS and tech companies, with AI, fintech, healthcare and security among the categories it lists. Answer engine optimization is a core service. Its approach starts from a baseline score of how often each AI engine mentions you against competitors, then adds schema, answer hubs, expert placements and mention monitoring. It also builds lead generation websites and runs HubSpot setups and migrations. The site lists it as a HubSpot Diamond Solutions Partner, founded in 2013 and based in Land O' Lakes, Florida, with a remote team. Clients named in testimonials and case studies include Qualio, ConnectPay, Predictive Index, Exit Five and ZenPilot. Lean Labs publishes its prices, which I cover in the cost section below.

5. Kalungi

Best for: Early-stage B2B SaaS companies that need a marketing leader as well as execution.

Kalungi works only with B2B SaaS companies and says it has worked with more than 280 of them. It sells CMO-as-a-service alongside content and SEO, paid media, account-based marketing, RevOps and HubSpot work, branding and web development. Clients choose between a done-for-you model, a model embedded with the client's team and a self-run playbook based on its T2D3 framework. Packages are matched to ARR stage from pre-product-market fit to $10 million. Its case studies report a 164% increase in organic MQLs in six months for One Click Contractor and 63% organic traffic growth for Beezy. Kalungi is based in Kirkland, Washington. Its homepage does not mention AI search services.

6. 310 Creative

Best for: B2B companies that want inbound, account-based marketing and outbound prospecting run by one team.

310 Creative organizes its inbound service around the attract, convert, close and delight stages, with content, SEO, paid media and marketing automation. It also offers account-based marketing, outbound lead generation through LinkedIn and site-visit outreach, HubSpot and WordPress websites and sales enablement. Its client page lists software companies such as GetResponse, Lawmatics, HammerTech and ZeroBounce, alongside manufacturing, professional services and media clients (310 Creative clients). Its homepage does not mention AI search services or a location. 310 Creative also publishes its own inbound agency list, which ranks first for this keyword and puts 310 Creative at the top.

7. Single Grain

Best for: Growth-stage companies that want SEO, AI search and paid acquisition from the same agency.

Single Grain is led by founder and CEO Eric Siu, who bought the agency in 2014. Its service list covers SEO, AEO and generative engine optimization, inbound and content marketing, paid search and social, conversion rate optimization and video. The agency describes itself as remote-first. Its site says it is trusted by teams at Amazon, Uber, Salesforce and Airbnb. B2B testimonials come from Nextiva and Lever (Single Grain about page). Pick Single Grain when paid media sits alongside organic in the same plan.

What an inbound marketing agency does in 2026

The classic inbound model of attract, convert, close and delight still describes the funnel. The work inside each stage has changed for B2B SaaS.

• Research: prompt research for AI assistants sits next to keyword research. The agency finds the questions buyers ask ChatGPT and Perplexity when they build a shortlist. Our guide to prompt research covers the method.
• Content: decision-stage pages come first. Comparison pages, alternatives pages, pricing explainers, integration pages and use-case pages convert at many times the rate of top-of-funnel posts.
• Off-site visibility: placements on the roundups, review sites and publications that AI answers cite for your category. Classic links still support Google rankings.
• Technical health: AI crawlers read raw HTML, so key pages need content in the server response. Our guide to whether AI can read your site explains the test.
• Conversion and attribution: forms, CTAs and tracking tie each page to demo requests, signups and pipeline.
• International: localized pages and native-language content for buyers outside the US.

Lead magnets, gated ebooks and email nurture still have a place. They now sit behind search and AI visibility instead of leading the program.

How much an inbound marketing agency costs

Only a few agencies on this list publish prices. These figures come from their own sites in October 2026.

310 Creative publishes general market estimates in its own guide. It puts small-business inbound retainers at $4,000 to $12,000 a month and mid-market programs at $15,000 to $30,000 or more (310 Creative). Three things move the price. They are how much content the agency produces each month, whether it also runs paid media or CRM work, and how many languages it covers. Ad spend, software and publisher fees usually sit outside the retainer. At Flying Cat, publisher fees for placements pass through at cost.

When an inbound agency fits better than hiring

An agency fits when you need several specialists at once, such as a strategist, writers who know your vertical, a technical SEO and an outreach lead, and cannot hire them all. It also fits when you need results inside two quarters and have no time to recruit. Hiring in-house fits better once the strategy works and the main task is producing more of the same. Leapsome ran this kind of hybrid. Its in-house content team owned the program. Flying Cat added quarterly reviews, AI search tracking and link building to priority pages. Our comparison of agency and in-house content teams goes deeper.

FAQ

What is an inbound marketing agency?

An inbound marketing agency attracts buyers to a company through content, search and AI visibility, then turns that attention into leads and pipeline. For B2B SaaS, the work usually covers SEO, AI search optimization, content, conversion paths and attribution. Some agencies also run marketing automation and CRM setup.

How much does an inbound marketing agency cost?

Published prices on this list start at $2,000 a month for advisory and around $4,000 to $5,000 a month for ongoing programs. 310 Creative estimates mid-market programs at $15,000 to $30,000 or more a month. Content volume, paid media, CRM work and languages drive the total.

How long does inbound marketing take to work?

Technical fixes and decision-stage pages can move signups within two months. Softr's paid signups rose 125% in the first two months from technical fixes alone (Softr case study). AI visibility tends to move within the first 60 days. Compounding growth from content usually takes six to twelve months.

Is a HubSpot partner agency the same as an inbound agency?

A HubSpot partner tier reflects CRM, automation and website skills on HubSpot. It does not certify search or content results. Several agencies on this list hold high HubSpot tiers and also run inbound programs. Check both skills separately.

If you want search and AI assistants to bring in more demos, book a call. I will look at where your demand comes from today and show you what we would build first.